MC55i AT Command Specification A75 Siemens

User Manual: A75

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MC55i
Siemens Cellular Engine
Version: 01.003
DocId: MC55i_ATC_V01.003
AT Command Set
MC55i AT Command Set
MC55i_ATC_V01.003 Page 2 of 479 2/28/08
Confidential / Released
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GENERAL NOTES - EXCLUSION OF LIABILITY
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Copyright © Siemens AG 2008
Document Name: MC55i AT Command Set
Version: 01.003
Date: February 28, 2008
DocId: MC55i_ATC_V01.003
Status Confidential / Released
MC55i AT Command Set
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1. Introduction............................................................................................................................................ 13
1.1 Scope of the document ................................................................................................................. 13
1.2 Related documents ....................................................................................................................... 14
1.3 Document conventions.................................................................................................................. 15
1.3.1 Quick reference table..................................................................................................... 15
1.3.2 Superscript notation for parameters and values ............................................................ 16
1.4 AT Command Syntax .................................................................................................................... 17
1.4.1 Using Parameters .......................................................................................................... 17
1.4.2 Combining AT commands on the same command line ................................................. 18
1.5 Supported character sets .............................................................................................................. 19
1.5.1 GSM alphabet tables and UCS2 character values ........................................................ 21
1.5.2 UCS2 and GSM data coding and conversion for SMS text mode and Remote SAT..... 23
1.5.2.1 Implementing output of SIM data to Terminal (direction TA to TE) ................................ 23
1.5.2.2 Implementing input of Terminal data to SIM (direction TE to TA)................................... 24
1.6 Communication between Customer Application and MC55i ......................................................... 25
1.7 Unsolicited Result Code Presentation........................................................................................... 26
1.8 Errors and Messages .................................................................................................................... 27
1.9 Second Serial Interface ASC1....................................................................................................... 28
1.10 Serial Interface Flow Control ......................................................................................................... 29
1.10.1 Software Flow Control (XON/OFF Handshake)............................................................. 29
1.10.2 Hardware Flow Control (RTS/CTS Handshake) ............................................................ 29
1.11 Common PCN Handset Specification (CPHS) .............................................................................. 30
2. Configuration Commands..................................................................................................................... 31
2.1 AT&F Set all current parameters to manufacturer defaults ......................................................... 31
2.2 AT&V Display current configuration ............................................................................................32
2.2.1 AT&V responses............................................................................................................ 33
2.3 AT&W Stores current configuration to user defined profile ......................................................... 34
2.4 ATQ Set result code presentation mode ..................................................................................... 35
2.5 ATV Set result code format mode ...............................................................................................36
2.5.1 Verbose and numeric result codes ................................................................................ 36
2.6 ATX Set CONNECT result code format and call monitoring ....................................................... 37
2.7 ATZ Set all current parameters to user defined profile................................................................ 38
2.8 AT+CFUN Set phone functionality .............................................................................................. 39
2.8.1 Wake up the ME from SLEEP mode ............................................................................. 43
2.9 AT^SMSO Switch off mobile station............................................................................................ 44
2.10 AT+GCAP Request complete TA capabilities list........................................................................ 45
2.11 AT+CMEE Mobile Equipment Error Message Format ................................................................ 46
2.11.1 CME/CMS Error Code Overview ................................................................................... 47
2.12 AT+CSCS Select TE character set ............................................................................................. 51
2.13 AT^SCFG Extended Configuration Settings ............................................................................... 52
2.14 AT^SM20 Set M20 compatibility mode ....................................................................................... 62
3. Status Control Commands ................................................................................................................... 63
3.1 AT+CMER Mobile Equipment Event Reporting .......................................................................... 63
3.2 AT+CIND Indicator control .......................................................................................................... 65
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3.3 AT^SIND Extended Indicator Control.......................................................................................... 68
3.4 AT+CEER Extended Error Report............................................................................................... 74
3.4.1 Cause Location ID for the extended error report ........................................................... 75
3.4.2 SIEMENS L2 cause ....................................................................................................... 76
3.4.3 GSM release cause for L3 Radio Resource (RR).......................................................... 76
3.4.4 SIEMENS release cause for L3 Radio Resource (RR).................................................. 77
3.4.5 GSM release cause for Mobility Management (MM) or Session Management (SM)..... 77
3.4.6 SIEMENS release cause for L3 Mobility Management (MM) ........................................ 78
3.4.7 GSM release cause for L3 Call Control (CC)................................................................. 79
3.4.8 SIEMENS release cause for L3 Call Control (CC)......................................................... 80
3.4.9 SIEMENS release cause for L3 Advice of Charge (AOC) ............................................. 81
3.4.10 GSM Release cause for Supplementary Service Call ................................................... 81
3.4.11 SIEMENS release cause for Call-related Supplementary Services (CRSS) ................. 82
3.4.12 SIEMENS release cause for Session Management (SM) ............................................. 83
3.4.13 GSM cause for L3 Protocol module or other local cause ............................................. 84
3.4.14 SIEMENS release cause for GPRS API ........................................................................ 84
3.4.15 SIEMENS release cause for PPP/IP-Stack ................................................................... 84
3.5 ATS18 Extended call release report............................................................................................85
3.6 AT+CPAS Mobile equipment activity status................................................................................ 87
3.7 AT+WS46 Select wireless network ............................................................................................. 88
4. Serial Interface Control Commands..................................................................................................... 89
4.1 AT\Q Flow control........................................................................................................................ 89
4.2 AT&C Set Data Carrier Detect (DCD) Line mode ....................................................................... 90
4.3 AT&D Set Data Terminal Ready (DTR) line mode ...................................................................... 91
4.4 AT&S Set Data Set Ready (DSR) line mode............................................................................... 92
4.5 ATE Enable command echo........................................................................................................ 93
4.6 AT+ILRR Set TE-TA local rate reporting..................................................................................... 94
4.7 AT+IPR Set Bitrate of local Asynchronous Serial Interface ........................................................ 96
4.7.1 Autobauding................................................................................................................... 97
4.8 AT+CMUX Enter multiplex mode ................................................................................................ 99
4.8.1 Restrictions on Multiplex mode.................................................................................... 100
5. Security Commands ............................................................................................................................ 102
5.1 AT+CPIN PIN Authentication ....................................................................................................102
5.1.1 What to do if PIN or password authentication fails? .................................................... 104
5.2 AT+CPIN2 PIN2 Authentication ................................................................................................ 106
5.3 AT^SPIC Display PIN counter...................................................................................................108
5.4 AT+CLCK Facility lock .............................................................................................................. 112
5.5 AT^SLCK Facility lock ............................................................................................................... 117
5.6 AT+CPWD Change Password .................................................................................................. 118
5.7 AT^SPWD Change Password................................................................................................... 122
6. Identification Commands.................................................................................................................... 123
6.1 ATI Display product identification information ........................................................................... 123
6.2 AT+CGMI Request manufacturer identification......................................................................... 124
6.3 AT+GMI Request manufacturer identification ........................................................................... 124
6.4 AT+CGMM Request model identification .................................................................................. 125
6.5 AT+GMM Request model identification..................................................................................... 125
6.6 AT+CGMR Request revision identification of software status................................................... 126
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6.7 AT+GMR Request revision identification of software status ..................................................... 126
6.8 AT+CGSN Request International Mobile Equipment Identity (IMEI)......................................... 127
6.9 AT+GSN Request International Mobile Equipment Identity (IMEI) ........................................... 127
6.10 AT+CIMI Request International Mobile Subscriber Identity (IMSI)............................................ 128
7. Call related Commands....................................................................................................................... 129
7.1 Call Status Information ................................................................................................................ 129
7.2 ATA Answer a call ..................................................................................................................... 130
7.3 ATD Mobile originated call to specified number........................................................................ 131
7.4 ATD><mem><n> Mobile originated call using specific memory and index number ................. 133
7.5 ATD><n> Mobile originated call from active memory using index number ............................... 135
7.6 ATD><str> Mobile originated call from active memory using corresponding field .................... 136
7.7 ATDI Mobile originated call to ISDN number............................................................................. 137
7.8 ATDL Redial last number used ................................................................................................. 138
7.9 ATH Disconnect existing connection......................................................................................... 139
7.10 AT+CHUP Hang up call ............................................................................................................ 140
7.11 ATS0 Set number of rings before automatically answering a call............................................. 141
7.12 ATS6 Set pause before blind dialing ......................................................................................... 142
7.13 ATS7 Set number of seconds to wait for connection completion .............................................. 143
7.14 ATS8 Set number of seconds to wait for comma dialing modifier............................................. 144
7.15 ATS10 Set disconnect delay after indicating the absence of data carrier ................................. 145
7.16 ATO Switch from command mode to data mode / PPP online mode........................................ 146
7.17 +++ Switch from data mode to command mode ....................................................................... 147
7.18 AT+CBST Select bearer service type ....................................................................................... 148
7.19 AT+CRLP Select radio link protocol parameters for originated non-transparent data calls ...... 149
7.20 AT+CLCC List of current calls................................................................................................... 150
7.21 AT^SLCC Extended list of current calls .................................................................................... 152
7.22 AT+CR Service reporting control ..............................................................................................157
7.23 AT+CRC Set Cellular Result Codes for incoming call indication .............................................. 158
7.24 AT+CSNS Single Numbering Scheme...................................................................................... 159
7.25 AT^SCNI List Call Number Information..................................................................................... 160
7.26 AT^SLCD Display Last Call Duration ........................................................................................ 161
7.27 AT^STCD Display Total Call Duration....................................................................................... 162
7.28 ATP Select pulse dialing ........................................................................................................... 163
7.29 ATT Select tone dialing ............................................................................................................. 163
7.30 ATS2 Set escape sequence character...................................................................................... 164
8. Network Service Commands .............................................................................................................. 165
8.1 AT+COPN Read operator names ............................................................................................. 165
8.2 AT+COPS Operator Selection .................................................................................................. 166
8.3 AT^SOPS Extended Operator Selection................................................................................... 169
8.4 AT+CREG Network registration ................................................................................................ 171
8.5 AT+CSQ Signal quality ............................................................................................................. 174
8.6 AT^SMONC Cell Monitoring......................................................................................................175
8.7 AT^SMOND Cell Monitoring......................................................................................................177
8.8 AT^MONI Monitor idle mode and dedicated mode ................................................................... 180
8.8.1 AT^MONI responses.................................................................................................... 181
8.8.2 Service states .............................................................................................................. 182
8.9 AT^MONP Monitor neighbour cells ........................................................................................... 183
8.9.1 AT^MONP responses .................................................................................................. 184
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8.10 AT^SMONG GPRS Monitor ...................................................................................................... 185
8.10.1 AT^SMONG Cell Info Table......................................................................................... 186
8.11 AT^SALS Alternate Line Service...............................................................................................187
8.12 AT^SHOM Display Homezone .................................................................................................. 189
8.13 AT^SPLM Read the PLMN list .................................................................................................. 190
8.14 AT+CPOL Preferred Operator List ............................................................................................ 191
8.15 AT^SPLR Read entry from the preferred operators list............................................................. 192
8.16 AT^SPLW Write an entry to the preferred operators list ........................................................... 193
9. Supplementary Service Commands .................................................................................................. 194
9.1 AT+CACM Accumulated call meter (ACM) reset or query ........................................................ 194
9.2 AT^SACM Advice of charge and query of ACM and ACMmax ................................................. 195
9.3 AT+CAMM Accumulated call meter maximum (ACMmax) set or query.................................... 197
9.4 AT+CAOC Advice of Charge information.................................................................................. 198
9.5 AT+CCUG Closed User Group ................................................................................................. 199
9.6 AT+CCFC Call forwarding number and conditions control ....................................................... 201
9.7 AT+CCWA Call Waiting ............................................................................................................ 205
9.8 AT+CHLD Call Hold and Multiparty........................................................................................... 209
9.9 AT+CLIP Calling Line Identification Presentation ..................................................................... 211
9.10 AT+CLIR Calling Line Identification Restriction ........................................................................ 213
9.11 AT+COLP Connected Line Identification Presentation ............................................................. 214
9.12 AT+CPUC Price per unit and currency table............................................................................. 216
9.13 AT+CSSN Supplementary service notifications ........................................................................ 218
9.14 AT+CUSD Unstructured supplementary service data............................................................... 220
10. Internet Service Commands ............................................................................................................... 222
10.1 AT^SICS Internet Connection Setup Profile.............................................................................. 225
10.1.1 Example: Default values of a CSD connection profile ................................................. 227
10.1.2 Example: GPRS connection profile ............................................................................. 228
10.2 AT^SICI Internet Connection Information.................................................................................. 229
10.2.1 Checking Connection Profile Status ............................................................................ 230
10.3 AT^SISS Internet Service Setup Profile .................................................................................... 231
10.4 AT^SISI Internet Service Information ........................................................................................ 240
10.5 AT^SISO Internet Service Open ............................................................................................... 242
10.5.1 Example: Accepting / Rejecting Socket Connection Request from Remote Client ..... 245
10.6 AT^SISC Internet Service Close ...............................................................................................247
10.7 AT^SISR Internet Service Read Data ....................................................................................... 248
10.7.1 Example: Socket Host Reads Small Amounts of UDP Data Packets (URC Mode)..... 249
10.8 AT^SISW Internet Service Write Data....................................................................................... 251
10.8.1 Usage of parameter <eodFlag>................................................................................... 253
10.9 AT^SISE Internet Service Error Report..................................................................................... 254
10.10 Internet Service URC "^SIS" ....................................................................................................... 255
10.10.1 Information Elements Related to the Service Application............................................ 256
10.10.2 Information Elements Related to FTP Service............................................................. 257
10.10.3 Information Elements Related to HTTP Service .......................................................... 258
10.10.4 Information Elements Related to POP3 Service.......................................................... 258
10.10.5 Information Elements Related to SMTP Service ......................................................... 258
10.11 Examples of how to Configure and Use Internet Service Profiles............................................... 259
10.11.1 Selecting URC Mode or Polling Mode ......................................................................... 259
10.11.2 Configuring Socket Listener......................................................................................... 259
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10.11.3 Configuring Socket Client for Calling a Socket Listener on Another Host ................... 260
10.11.4 Socket Client Sends Data via TCP Connection (Polling Mode)................................... 260
10.11.5 Socket client sends data via TCP connection with URCs............................................ 261
10.11.6 Configuring and Using FTP Download (URC Mode) ................................................... 261
10.11.7 Configuring and Using FTP Upload (URC Mode)........................................................ 262
10.11.8 Configuring SMPT Service Profile ............................................................................... 262
10.11.9 Sending Email (URC Mode) ........................................................................................ 263
10.11.10 Sending Email (Polling Mode) ..................................................................................... 264
10.11.11 Configuring POP3 Service Profile................................................................................ 265
10.11.12 Retrieving Email (URC Mode) ..................................................................................... 266
10.11.13 Retrieving Email (Polling Mode) .................................................................................. 266
10.11.14 HTTP POST (Polling Mode) ........................................................................................ 267
10.11.15 HTTP GET (Polling Mode)........................................................................................... 268
11. GPRS Commands ................................................................................................................................ 269
11.1 AT+CGACT PDP context activate or deactivate ....................................................................... 269
11.2 AT+CGANS Manual response to a network request for PDP context activation ...................... 271
11.3 AT+CGATT GPRS attach or detach ......................................................................................... 273
11.4 AT+CGAUTO Automatic response to a network request for PDP context activation ............... 274
11.5 AT+CGEREP GPRS event reporting ........................................................................................ 276
11.6 AT+CGDATA Enter data state .................................................................................................. 278
11.6.1 Automatic deactivation of PDP context during dial-up PPP......................................... 279
11.7 AT+CGDCONT Define PDP Context ........................................................................................ 280
11.8 AT+CGPADDR Show PDP address ......................................................................................... 282
11.9 AT+CGQMIN Quality of Service Profile (Minimum acceptable) ................................................ 283
11.10 AT+CGQREQ Quality of Service Profile (Requested) .............................................................. 287
11.11 AT+CGREG GPRS Network Registration Status...................................................................... 291
11.12 AT+CGSMS Select service for MO SMS messages................................................................. 293
11.13 AT^SGAUTH Set type of authentication for PPP connection.................................................... 294
11.14 AT^SGCONF Configuration of GPRS related Parameters ...................................................... 295
11.15 ATA Manual response to a network request for PDP context activation................................... 296
11.16 ATD*99# Request GPRS service.............................................................................................. 297
11.17 ATD*98# Request GPRS IP service ......................................................................................... 298
11.18 ATH Manual rejection of a network request for PDP context activation.................................... 299
11.19 ATS0 Automatic response to a network request for PDP context activation............................. 300
11.20 Using GPRS AT commands (Examples)..................................................................................... 301
11.21 Using the GPRS dial command ATD .......................................................................................... 303
12. FAX Commands ................................................................................................................................... 304
12.1 FAX parameters .......................................................................................................................... 304
12.1.1 Summary of Fax Class 2 URCs defined by EIA PN-2388 ........................................... 306
12.2 AT+FBADLIN Bad Line Threshold ............................................................................................ 307
12.3 AT+FBADMUL Error Threshold Multiplier ................................................................................. 308
12.4 AT+FBOR Query data Bit Order ............................................................................................... 309
12.5 AT+FCIG Query or set the Local Polling ID .............................................................................. 310
12.6 AT+FCLASS Fax: Select, read or test service class................................................................. 311
12.7 AT+FCQ Copy Quality Checking .............................................................................................. 312
12.8 AT+FCR Capability to Receive .................................................................................................313
12.9 AT+FDCC Query or set capabilities .......................................................................................... 314
12.10 AT+FDFFC Data Compression Format Conversion ................................................................. 315
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12.11 AT+FDIS Query or set session parameters .............................................................................. 316
12.12 AT+FDR Begin or continue phase C Data Reception ............................................................... 317
12.13 AT+FDT Data Transmission...................................................................................................... 318
12.14 AT+FET End a page or document ............................................................................................ 319
12.15 AT+FK Kill operation, orderly FAX abort ................................................................................... 320
12.16 AT+FLID Query or set the Local Id setting capabilities ............................................................. 321
12.17 AT+FMDL Identify Product Model ............................................................................................ 322
12.18 AT+FMFR Request Manufacturer Identification........................................................................ 323
12.19 AT+FOPT Set bit Order independently ..................................................................................... 324
12.20 AT+FPHCTO DTE Phase C Response Timeout....................................................................... 325
12.21 AT+FREV Identify Product Revision ......................................................................................... 326
12.22 AT+FRH Receive Data Using HDLC Framing .......................................................................... 327
12.23 AT+FRM Receive Data ............................................................................................................. 328
12.24 AT+FRS Receive Silence.......................................................................................................... 329
12.25 AT+FTH Transmit Data Using HDLC Framing.......................................................................... 330
12.26 AT+FTM Transmit Data............................................................................................................. 331
12.27 AT+FTS Stop Transmission and Wait....................................................................................... 332
12.28 AT+FVRFC Vertical Resolution Format Conversion ................................................................. 333
13. Short Message Service (SMS) Commands........................................................................................ 334
13.1 SMS parameters ......................................................................................................................... 334
13.2 AT+CMGC Send an SMS command......................................................................................... 338
13.3 AT+CMGD Delete short message............................................................................................. 339
13.4 AT+CMGF Select SMS message format .................................................................................. 340
13.5 AT+CMGL List SMS messages from preferred store................................................................ 341
13.6 AT+CMGR Read SMS messages............................................................................................. 343
13.7 AT+CMGS Send Short Message .............................................................................................. 345
13.8 AT+CMGW Write Short Messages to Memory ......................................................................... 347
13.9 AT+CMSS Send short messages from storage ........................................................................ 349
13.10 AT+CNMA New Message Acknowledgement to ME/TE, only phase 2+ .................................. 350
13.11 AT+CNMI New short Message Indication ................................................................................. 351
13.12 AT+CPMS Preferred SMS message storage............................................................................ 354
13.13 AT+CSCA SMS Service Center Address.................................................................................. 356
13.14 AT+CSCB Select Cell Broadcast Message Indication .............................................................. 357
13.15 AT+CSDH Show SMS text mode parameters........................................................................... 358
13.16 AT+CSMP Set SMS text Mode Parameters.............................................................................. 359
13.17 AT+CSMS Select Message Service.......................................................................................... 361
13.18 AT^SLMS List SMS Memory Storage ....................................................................................... 363
13.19 AT^SMGL List Short Messages from preferred store without setting status to REC READ ..... 364
13.20 AT^SMGO Set or query SMS overflow presentation mode or query SMS overflow ................. 365
13.21 AT^SMGR Read short message without setting status to REC READ..................................... 367
13.22 AT^SSCONF SMS Command Configuration ........................................................................... 368
13.23 AT^SSDA Set SMS Display Availability .................................................................................... 369
13.24 AT^SSMSS Set Short Message Storage Sequence ................................................................. 370
14. SIM related Commands ....................................................................................................................... 371
14.1 AT+CRSM Restricted SIM Access............................................................................................ 371
14.2 AT^SXSM Extended SIM Access.............................................................................................. 373
14.3 AT^SCKS Query SIM and Chip Card Holder Status ................................................................. 375
14.4 AT^SCID Display SIM card identification number ..................................................................... 377
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14.5 AT+CXXCID Display card ID..................................................................................................... 378
15. SIM Application Toolkit (SAT) Commands........................................................................................ 379
15.1 AT^SSTA SAT Interface Activation ........................................................................................... 379
15.2 ^SSTN SAT Notification ............................................................................................................ 381
15.3 AT^SSTGI SAT Get Information ............................................................................................... 382
15.4 AT^SSTR SAT Response .........................................................................................................383
16. Phonebook Commands....................................................................................................................... 384
16.1 Sort Order for Phonebooks ......................................................................................................... 384
16.2 AT+CPBR Read from Phonebook............................................................................................. 385
16.3 AT+CPBS Select phonebook memory storage ......................................................................... 388
16.4 AT+CPBW Write into Phonebook ............................................................................................. 390
16.5 AT^SPBC Find first matching entry in sorted phonebook ......................................................... 393
16.6 AT^SPBD Purge phonebook memory storage.......................................................................... 394
16.7 AT^SPBG Display phonebook entries in alphabetical order ..................................................... 395
16.8 AT^SPBS Step through the selected phonebook alphabetically............................................... 398
16.9 AT+CNUM Read own numbers................................................................................................. 402
16.10 AT^SDLD Delete the 'last number redial' memory .................................................................... 403
17. Audio Commands ................................................................................................................................ 404
17.1 Audio programming model .......................................................................................................... 404
17.2 ATL Set monitor speaker loudness ........................................................................................... 405
17.3 ATM Set monitor speaker mode................................................................................................ 405
17.4 AT+CLVL Loudspeaker volume level........................................................................................ 406
17.5 AT+CMUT Mute control ............................................................................................................ 407
17.6 AT+VTD Tone duration ............................................................................................................. 408
17.7 AT+VTS DTMF and tone generation......................................................................................... 409
17.8 AT^SAIC Audio Interface Configuration .................................................................................... 410
17.9 AT^SNFA Set or query of microphone attenuation .................................................................. 412
17.10 AT^SNFD Set audio parameters to manufacturer default values ............................................. 414
17.11 AT^SNFI Set microphone path parameters .............................................................................. 415
17.12 AT^SNFM Set microphone audio path and power supply......................................................... 416
17.13 AT^SNFO Set audio output (= loudspeaker path) parameter ................................................... 418
17.14 AT^SNFPT Set progress tones .................................................................................................420
17.15 AT^SNFS Select audio hardware set........................................................................................ 421
17.16 AT^SNFTTY Signal TTY/CTM audio mode capability............................................................... 424
17.17 AT^SNFV Set loudspeaker volume........................................................................................... 426
17.18 AT^SNFW Write audio setting in non-volatile store .................................................................. 427
17.19 AT^SRTC Ring tone configuration ............................................................................................ 428
18. Hardware Related Commands............................................................................................................ 430
18.1 AT+CCLK Real Time Clock....................................................................................................... 430
18.2 AT+CALA Set alarm time ......................................................................................................... 431
18.3 AT^SBC Battery Charge Control............................................................................................... 434
18.3.1 Responses returned by read command....................................................................... 436
18.4 AT^SBV Battery/Supply Voltage ............................................................................................... 437
18.5 AT^SCTM Set critical operating temperature presentation mode or query temperature........... 438
18.5.1 Deferred shutdown ...................................................................................................... 440
18.6 AT^SSYNC Configure SYNC Pin.............................................................................................. 441
18.6.1 ME status indicated by status LED patterns ................................................................ 442
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19. Miscellaneous Commands.................................................................................................................. 443
19.1 A/ Repeat previous command line ............................................................................................ 443
19.2 ATS3 Set command line termination character......................................................................... 444
19.3 ATS4 Set response formatting character .................................................................................. 445
19.4 ATS5 Write command line editing character ............................................................................. 446
20. Appendix .............................................................................................................................................. 447
20.1 Restricted access to SIM data after SIM PIN authentication....................................................... 447
20.2 Star-Hash (*#) Network Commands............................................................................................ 448
20.3 Available AT Commands and Dependency on SIM PIN ............................................................. 451
20.4 Availability of AT Commands Depending on Operating Mode of ME.......................................... 458
20.5 AT Command Settings storable with AT&W................................................................................ 465
20.6 Factory Default Settings Restorable with AT&F.......................................................................... 468
20.7 Summary of Unsolicited Result Codes (URC)............................................................................. 471
20.8 Alphabetical List of AT Commands ............................................................................................. 474
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Table 1.1: Symbols used to mark the type of parameters ...........................................................................16
Table 1.2: Symbols used to indicate the correlations with other commands ............................................... 16
Table 1.3: Symbols used to mark different types of default values of parameters ..................................... 16
Table 1.4: Types of AT commands and responses .................................................................................... 17
Table 1.5: Examples for character definitions depending on alphabet ........................................................ 19
Table 2.1: Current configuration on ASC0 / MUX channel 1 (example) ...................................................... 33
Table 2.2: Current configuration on ASC1 and MUX channels 2 and 3 (example) .................................... 33
Table 2.3: Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes ................................................. 43
Table 2.4: General "CME ERROR" Codes (GSM 07.07) .......................................................................... 47
Table 2.5: General "CME ERROR" Codes (SIEMENS) ............................................................................ 48
Table 2.6: GPRS related "CME ERROR" Codes (GSM 07.07) ................................................................. 48
Table 2.7: SMS related "CMS ERROR" Codes (GSM 07.05) ................................................................... 48
Table 4.1: Availability of AT Commands on Virtual Channels .................................................................. 100
Table 4.2: Summary of AT commands with Different Behavior in Multiplex Mode ................................... 101
Table 10.1: Applicability of AT^SICS <conParmTag> values ................................................................... 225
Table 10.2: Applicability of AT^SISS <srvParmTag> values ................................................................... 231
Table 12.1: Summary of Fax Class 2 URCs defined by EIA PN-2388 ........................................................ 306
Table 18.1: Modes of the LED and indicated ME functions......................................................................... 442
Table 20.1: Star-Hash (*#) Command Overview ........................................................................................ 448
Table 20.2: Abbreviations of Codes and Parameters used in Table 20.1 .................................................. 449
Table 20.3: Star-Hash Command Response Parameters .......................................................................... 450
Table 20.4: Star-Hash Commands for Supplementary Services ................................................................ 450
Table 20.5: Available AT Commands and Dependency on SIM PIN........................................................... 451
Table 20.6: Availability of AT Commands Depending on Operating Mode of ME ....................................... 458
Table 20.7: Settings Stored to User Profile on ASC0 / MUX Channel 1...................................................... 465
Table 20.8: Settings Stored to User Profile on ASC1 / MUX Channels 2 and 3.......................................... 466
Table 20.9: Factory Default Settings Restorable with AT&F ....................................................................... 468
Table 20.10: Summary of Unsolicited Result Codes (URC) .......................................................................... 471
Table 20.11: Alphabetical List of AT Commands........................................................................................... 474
List of Tables
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Figure 1.1: Main character table of GSM 03.38 alphabet ............................................................................. 21
Figure 1.2: Extension character table of GSM 03.38 alphabet ..................................................................... 22
Figure 17.1: Audio programming model for MC55i Module .......................................................................... 404
List of Figures
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1. Introduction
1.1 Scope of the document
This document presents the AT Command Set for the Siemens Cellular Engine
MC55i Release 01.003.
Before using the Cellular Engine or upgrading to a new firmware version please read the latest product informa-
tion provided in the Release Notes [1].
More information is available at the Siemens Website: http://www.siemens.com/wm.
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1.2 Related documents
[1] MC55i Release Notes, Version 01.003
[2] MC55i Hardware Interface Description, Version 01.003
[3] Remote-SAT User's Guide
[4] GPRS Startup User's Guide
[5] Multiplexer User's Guide
[6] Multiplex Driver Developer's Guide for Windows 2000 and Windows XP
[7] Multiplex Driver Installation Guide for Windows 2000 and Windows XP
[8] Application Note 02: Audio Interface Design
[9] Application Note 16: Updating MC55i Firmware
[10] Application Note 22: Using TTY / CTM equipment with MC55i
[11] Application Note 24: Application Developer's Guide
[12] ISO/IEC10646: "Universal Multiple-Octet Coded Character Set (UCS)"; UCS2, 16 bit coding
[13] ITU-T Recommendation V.24: List of definitions for interchange circuits between data terminal equipment
(DTE) and data circuit-terminating equipment (DCE)
[14] ITU-T Recommendation V.250: Serial asynchronous automatic dialling and control
[15] 3GPP TS 100 918/EN 300 918 (GSM 02.04): General on supplementary services
[16] 3GPP TS 100 907 (GSM 02.30): Man-Machine Interface (MMI) of the Mobile Station (MS)
[17] 3GPP TS 23.038 (GSM 03.38): Alphabets and language specific information
[18] 3GPP TS 27.005 (GSM 07.05): Use of Data Terminal Equipment - Data Circuit terminating Equipment (DTE
- DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)
[19] 3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)
[20] 3GPP TS 27.060 (GSM 07.60): Mobile Station (MS) supporting Packet Switched Services
[21] 3GPP TS 51.011 (GSM 11.11): Specification of the Subscriber Identity Module - Mobile Equipment (SIM -
ME) interface
[22] 3GPP TS 11.14 (GSM 11.14): Specification of the SIM Application Toolkit for the Subscriber Identity Module
- Mobile Equipment (SIM - ME) interface
[23] 3GPP TS 22.101 (GSM 22.101): Service principles
[24] Common PCN Handset Specification (CPHS) v4.2
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1.3 Document conventions
Throughout the document, the GSM engines are referred to as ME (Mobile Equipment), MS (Mobile Station), TA
(Terminal Adapter), DCE (Data Communication Equipment) or facsimile DCE (FAX modem, FAX board).
To control your GSM engine you can simply send AT Commands via its serial interface. The controlling device
at the other end of the serial line is referred to as TE (Terminal Equipment), DTE (Data Terminal Equipment) or
plainly 'the application' (probably running on an embedded system).
All abbreviations and acronyms used throughout this document are based on the GSM specifications. For defi-
nitions please refer to TR 100 350 V7.0.0 (1999-08), (GSM 01.04, version 7.0.0 release 1998).
1.3.1 Quick reference table
Each AT command description includes a table similar to the example shown below. The table is intended as a
quick reference to indicate the following functions:
Example:
PIN: Is the AT command PIN protected?
+Yes
-No
±Usage is dependent on conditions specified for the command, or not all command types are PIN
protected (for example write command PIN protected, read command not).
Note: The table provided in Section 20.3, Available AT Commands and Dependency on SIM
PIN uses the same symbols.
ASC0: Is the AT command supported on the first physical serial interface ASC0?
+Yes
-No
ASC1: Is the AT command supported on the second physical serial interface ASC1?
+Yes
-No
MUXn: Is the AT command usable on the Multiplexer channels MUX1, MUX2, MUX3?
+Yes
-No
±AT command is usable, but under the restrictions specified in the section related to the command.
Note: The columns MUX1, MUX2 and MUX3 are relevant only when the GSM engine operates in Mul-
tiplexer mode, that is, when the first physical serial interface is partitioned into 3 virtual channels
by using the Multiplexer protocol. Usage is the same on ASC0 and MUX1.
Is the AT command supported in ALARM mode?
+Yes
-No
Charge: Is the AT command supported in CHARGE ONLY mode?
+Yes
-No
±AT command is usable, but under the restrictions specified in the section related to the command.
Last: If commands are concatenated, this AT command must be the last one.
+Yes
-No
Note: See also Section 1.4, AT Command Syntax for details on concatenated AT commands.
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + ± ± ± + - -
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1.3.2 Superscript notation for parameters and values
Table 1.1: Symbols used to mark the type of parameters
Table 1.2: Symbols used to indicate the correlations with other commands
Table 1.3: Symbols used to mark different types of default values of parameters
Parameter type Meaning
<param>(num) Parameter value must be numeric type
<param>(str) Parameter value must be string type
Parameter option Meaning
<param>(&W) Parameter value will be stored with AT&W
<param>(&V) Parameter value will be displayed with AT&V
<param>(ˆSNFW) Parameter value will be stored with AT^SNFW
<param>(+CSCS) Parameter value has to be (is) coded according to current setting of <chset> (see
AT+CSCS for details)
Value option Meaning
[x] Default value: if the parameter is omitted, the value 'x' will be assumed
x(&F) Factory default value, will be restored to 'x' with AT&F
x(P) Powerup default value of a parameter which is not stored at power down
x(D) Delivery default value of a parameter which cannot be restored automatically
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1.4 AT Command Syntax
The "AT" or "at" prefix must be set at the beginning of each command line. To terminate a command line enter
<CR>. Commands are usually followed by a response that includes "<CR><LF><response><CR><LF>". Through-
out this document, only the responses are presented, <CR><LF> are omitted intentionally.
Table 1.4: Types of AT commands and responses
1.4.1 Using Parameters
• Optional parameters are enclosed in square brackets. If optional parameters are omitted, the current settings
are used until you change them.
• Optional parameters or subparameters can be omitted unless they are followed by other parameters. If you
want to omit a parameter in the middle of a string it must be replaced by a comma. See also example 1.
• A parameter value enclosed in square brackets represents the value that will be used if an optional parameter
is omitted. See also example 2.
• When the parameter is a character string, e.g. <text> or <number>, the string must be enclosed in quotation
marks, e.g. "Charlie Brown" or "+49030xxxx". Symbols in quotation marks will be recognized as strings.
• All spaces will be ignored when using strings without quotaton marks.
• It is possible to omit the leading zeros of strings which represent numbers.
• If an optional parameter of a V.250 command is omitted, its value is assumed to be 0.
Example 1: Omitting parameters in the middle of a string
Example 2: Using default parameter values for optional parameters
AT command type Syntax Function
Test command AT+CXXX=? The mobile equipment returns the list of parameters and value
ranges set with the corresponding Write command or by internal
processes.
Read command AT+CXXX? This command returns the currently set value of the parameter or
parameters.
Write command AT+CXXX=<...> This command sets user-definable parameter values.
Exec(ution) command AT+CXXX The execution command reads non-variable parameters deter-
mined by internal processes in the GSM engine.
AT+CCUG?
Query current setting
+CCUG: 1,10,1
OK
AT+CCUG=,9
Set only the middle parameter
OK
AT+CCUG?
Query new setting
+CCUG: 1,9,1
OK
AT+CFUN=5
Activate CYCLIC SLEEP mode, don't reset ME
OK
AT+CFUN?
Query ME mode
+CFUN: 5
OK
AT+CFUN=
Set ME back to normal (default parameters: 1,0)
OK
+CFUN: 1
OK
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1.4.2 Combining AT commands on the same command line
You may enter several AT commands on the same line. This eliminates the need to type the "AT" or "at" prefix
before each command. Instead, it is only needed once at the beginning of the command line. Use a semicolon
as command delimiter.
The table below lists the AT commands you cannot enter together with other commands on the same line. Oth-
erwise, the responses may not be in the expected order.
Note: When concatenating AT commands please keep in mind that the sequence of processing may be different
from the sequential order of command input. Therefore, if the consecutive order of the issued commands and
the associated responses is your concern, avoid concatenating commands on the same line.
AT command type Comment
V.250 commands with FAX commands (Prefix AT+F)
GSM 7.07 commands with Siemens commands, Prefix AT^S)
GSM 7.05 commands (SMS) To be used standalone
Commands starting with AT& To be used standalone
AT+IPR To be used standalone
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1.5 Supported character sets
The ME supports two character sets: GSM 03.38 (7 bit, also referred to as GSM alphabet or SMS alphabet) and
UCS2 (16 bit, refer to ISO/IEC 10646). See AT+CSCS for information about selecting the character set. Character
tables can be found below.
Explanation of terms
• International Reference Alphabet (IRA)
IRA means that one byte is displayed as two characters in hexadecimal format. For example, the byte 0x36
(decimal 54) is displayed as "36" (two characters). IRA is used here for input 8-bit or 16-bit data via terminal
devices using text mode. This means only characters 'A'..F','a'..'f' and '0'..'9' are valid.
• Escape sequences
The escape sequence used within a text coded in the GSM default alphabet (0x1B) must be correctly inter-
preted by the TE, both for character input and output. To the module, an escape sequence appears like any
other byte received or sent.
• Terminal Adapter (TA)
TA is an equivalent to Mobile Equipment (ME) which stands for the GSM module described here. It uses GSM
default alphabet as its character set.
• Terminal Equipment (TE)
TE is the device connected to the TA via serial interface. In most cases TE is an ANSI/ASCII terminal that
does not fully support the GSM default alphabet, for example MS Hyperterminal.
• TE Character Set
The character set currently used by Terminal Equipment is selected with AT+CSCS.
• Data Coding Scheme (dcs)
DCS is part of a short message and is saved on the SIM. When writing a short message to the SIM in text
mode, the dcs stored with AT+CSMP is used and determines the coded character set.
When you enter characters that are not valid characters of the supported alphabets the behavior is undefined.
Due to the constraints described below it is recommended to prefer the USC2 alphabet in any external applica-
tion.
If the GSM alphabet is selected all characters sent over the serial line (between TE and TA) are in the range from
0 to 127 (7 Bit range). CAUTION: ASCII alphabet (TE) is not GSM alphabet (TA/ME) !
Several problems resulting from the use of GSM alphabet with ASCII terminal equipment:
• "@" character with GSM alphabet value 0 is not printable by an ASCII terminal program (e.g. Microsoft©
Hyperterminal®).
• "@" character with GSM alphabet value 0 will terminate any C string! This is because the 0 is defined as C
string end tag. Therefore, the GSM Null character may cause problems on application level when using a 'C'-
function as "strlen()". This can be avoided if it is represented by an escape sequence as shown in the table
below.
By the way, this may be the reason why even network providers often replace "@"with "@=*" in their SIM
application.
• Other characters of the GSM alphabet are misinterpreted by an ASCII terminal program. For example, GSM
"ö" (as in "Börse") is assumed to be "|" in ASCII, thus resulting in "B|rse". This is because both alphabets mean
different characters with values hex. 7C or 00 and so on.
When you write characters differently coded in ASCII and GSM (e.g. Ä, Ö, Ü), you need to enter escape
sequences. Such a character is translated into the corresponding GSM character value and, when output later,
the GSM character value can be presented. Any ASCII terminal then will show wrong responses.
Regardless of the selected alphabet, keep in mind that, when software flow control is activated, decimal 17 and
19 are interpreted as XON/XOFF control characters.
Table 1.5: Examples for character definitions depending on alphabet
GSM 03.38
character
GSM character
hex. value
Corresponding
ASCII character
ASCII
Esc sequence
Hex Esc
sequence
Ö5C \\5C 5C 35 43
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CAUTION: Often, the editors of terminal programs do not recognize escape sequences. In this case, an escape
sequence will be handled as normal characters. The most common workaround to this problem is to write a script
which includes a decimal code instead of an escape sequence. This way you can write, for example, short mes-
sages which may contain differently coded characters.
"22 "\22 5C 32 32
@00 NULL \00 5C 30 30
GSM 03.38
character
GSM character
hex. value
Corresponding
ASCII character
ASCII
Esc sequence
Hex Esc
sequence
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1.5.1 GSM alphabet tables and UCS2 character values
This section provides tables for the GSM 03.38 alphabet supported by the ME. Below any GSM character find
the corresponding two byte character value of the UCS2 alphabet.
(For related mapping definition see: http://www.unicode.org/Public/MAPPINGS/ETSI/GSM0338.TXT)
1) This code is an escape to the following extension of the 7 bit default alphabet table.
2) This code is not a printable character and therefore not defined for the UCS2 alphabet. It shall be treated as the accom-
panying control character.
3) As the standard GSM alphabet does not provide a backspace functionality the MC55i is designed to use the GSM char-
acter 08 (hex 0x08) as backspace. This allows the user to easily erase the last character when using an ASCII terminal.
On the other hand, this solution requires entering the escape sequence \08 for writing the "ò" character in GSM alphabet.
Figure 1.1: Main character table of GSM 03.38 alphabet
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1) This code value is reserved for the extension to another extension table. On receipt of this code, a receiving entity shall
display a space until another extension table is defined.
2) This code represents the EURO currency symbol. The code value is the one used for the character 'e'. Therefore a receiv-
ing entity which is incapable of displaying the EURO currency symbol will display the character 'e' instead.
3) This code is defined as a Page Break character and may be used for example in compressed CBS messages. Any mobile
which does not understand the 7 bit default alphabet table extension mechanism will treat this character as Line Feed.
Figure 1.2: Extension character table of GSM 03.38 alphabet
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In the event that an MS receives a code where a symbol is not represented in Figure 1.2, Extension character
table of GSM 03.38 alphabet the MS shall display the character shown in the main default 7 bit alphabet table
(see Figure 1.1, Main character table of GSM 03.38 alphabet).
1.5.2 UCS2 and GSM data coding and conversion for SMS text mode
and Remote SAT
This section provides basic information on how to handle input and output character conversion for SMS text
mode and Remote SAT if internal (TA) and external (TE) character representation differ, i.e. if the Data Coding
Scheme and the TE character use different coding.
1.5.2.1 Implementing output of SIM data to Terminal (direction TA to
TE)
Note: The ratio of SIM bytes to output bytes is given in parentheses.
Case 1
Every GSM character is sent to the TE as it is (8-bit value with highest bit set to zero).
Example: 47'H, 53'H, 4D'H → 47'H, 53'H, 4D'H, displayed as "GSM"
Case 2
Every data byte is sent to the TE as 2 IRA characters each representing a halfbyte.
Example: B8'H (184 decimal) → 42'H, 38'H, displayed as "B8"
Case 3
Every 16-bit UCS2 value is sent to the TE as 4 IRA characters.
Example: C4xA7'H (50343 decimal) → 43'H, 34'H, 41'H, 37'H, displayed as "C4A7"
Problem: An odd number of bytes leads to an error because there are always two bytes needed for each USC2
character
Case 4
Every GSM character is sent to the TE as 4 IRA characters to show UCS2 in text mode.
Example: 41'H ("A") → 30'H, 30'H, 34'H, 31'H, displayed as "0041"
Case 5
Every data byte is sent to the TE as IRA representation of UCS2 (similar to case 4).
Example: B2'H → 30'H, 30'H, 42'H, 32'H, displayed as "00B2"
Case 6
Every 16-bit value is sent to the TE as IRA representation of it. It is assumed that number of bytes is even.
Example: C3x46'H → 43'H, 33'H, 34'H, 36'H, displayed as "C346"
Used character set DCS = 7 bit
GSM
DCS = 8 bit
Data
DCS = 16 bit
UCS2
GSM Case 1
GSM (1:1)
Case 2
8 bit to IRA (1:2)
Case 3
UCS2 to IRA (2:4)
UCS2 Case 4
GSM to IRA (1:4)
Case 5
8 bit to IRA (1:4)
Case 6
UCS2 to IRA (2:4)
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1.5.2.2 Implementing input of Terminal data to SIM (direction TE to TA)
Note: The ratio between the number of input characters and bytes stored on the SIM is given in parentheses.
Case 1
Every character is sent from TE to TA as GSM character (or ASCII with standard terminal emulation, e.g. Hyper-
terminal).
Character value must be in range from 0 to 127 because of 7-bit GSM alphabet.
To reach maximum SMS text length of 160 characters in 140 bytes space characters will be compressed on SIM.
This must be set using the parameter <dcs> of AT+CSMP (add 64).
Example: "ABCDEFGH" typed is sent and stored uncompressed as → 4142434445464748'H (stored com-
pressed as 41E19058341E91'H)
Case 2
Every data byte is sent as 2 IRA characters.
Maximum text length is 280 IRA characters which will be converted into 140 bytes SMS binary user data
Example: "C8" typed is sent as 43'H, 38'H → stored as C8'H
Case 3
Every 16-bit value is sent as 4 IRA characters.
Maximum text length is 280 IRA characters which will be converted into 70 UCS2 characters (16-bit each)
Number of IRA characters must be a multiple of four because always 4 half bytes are needed for a 16-bit value
Example: "D2C8" typed is sent as 44'H, 32'H, 43'H, 38'H → stored as D2C8'H
Case 4
Every GSM character is sent as 4 IRA characters representing one UCS2 character.
Example: To store text "ABC" using UCS2 character set you have to type "004100420043".
This is sent as 30'H,30'H,34'H,31'H, 30'H,30'H,34'H,32'H, 30'H,30'H,34'H,33'H → detected as IRA representa-
tion of 3 UCS2 characters, converted to GSM character set and stored as 41'H, 42'H, 43'H.
Maximum input is 640 IRA characters repesenting 160 UCS2 characters when compression is active. These are
converted to 160 GSM 7-bit characters.
Without compression only 140 GSM characters can be stored which are put in as 560 IRA characters.
Values of UCS2 characters must be smaller than 80'H (128 decimal) to be valid GSM characters.
Number of IRA characters must be a multiple of four. Problems:
• "41" → Error, there are four IRA characters (two bytes) needed
• "0000" → Error, not an UCS2 character
• "4142" → Error, value of UCS2 character > 7F'H
• "008B" → Error, value of UCS2 character > 7F'H
This affects the maximum input length of a string)
Case 5
Every UCS2 character is sent as 4 IRA characters and is converted into two 8-bit values. This means that the
first two characters have to be '00'.
Example: UCS2 character 009F'H typed as "009F" is sent as 30'H,30'H,39'H,46'H → converted into 8-bit value
9F'H.
Maximum number of UCS2 characters is 140 which are represented by 560 IRA characters. Number of IRA char-
acters must be a multiple of four.
Case 6
Every UCS2 character is sent as 4 IRA characters each and is converted into a 16-bit value again.
Example: UCS2 character 9F3A'H typed as "9F3A" is sent as 39'H,46'H,33'H,41'H → converted into 9F3A'H.
Maximum number of UCS2 characters is 70 which are represented by 280 IRA characters. Number of IRA char-
acters must be a multiple of four.
Invalid UCS2 values must be prevented.
Used character set DCS = 7 bit
GSM
DCS = 8 bit
Data
DCS = 16 bit
UCS2
GSM Case 1
GSM (1:1)
Case 2
IRA to 8 bit (2:1)
Case 3
IRA to 16 bit (4:2)
UCS2 Case 4
UCS2 to GSM (4:1)
Case 5
UCS2 to 8 bit (4:1)
Case 6
UCS2 to 16 bit (4:2)
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1.6 Communication between Customer Application and MC55i
Leaving hardware flow control unconsidered the Customer Application (TE) is coupled with the MC55i (ME) via
a receive and a transmit line.
Since both lines are driven by independent devices collisions may (and will) happen. For example, if the TE
issues an AT command the MC55i starts sending a URC. This will probably cause the TE to misinterpret of the
URC being part of the AT command's response.
To avoid this conflict the following measures must be taken:
• If an AT command is finished (with "OK" or "ERROR") the TE shall always wait at least 100 milliseconds
before sending the next one.
This gives the MC55i the opportunity to transmit pending URCs and get necessary service.
Note that some AT commands may require more delay after "OK" or "ERROR" response, refer to the following
command specifications for details.
• The TE shall communicate with the MC55i using activated echo (ATE1), i.e. the MC55i echoes characters
received from the TE.
Hence, when the TE receives the echo of the first character "A" of the AT command just sent by itself it has
control both over the receive and the transmit paths.
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1.7 Unsolicited Result Code Presentation
URC stands for Unsolicited Result Code and is a report message issued by the ME without being requested by
the TE, i.e. a URC is issued automatically when a certain event occurs. Hence, a URC is not issued as part of
the response related to an executed AT command.
Typical events leading to URCs are incoming calls ("RING"), waiting calls, received short messages, changes in
temperature, network registration etc.
A list of all URCs can be found in Section 20.7, Summary of Unsolicited Result Codes (URC).
To announce a pending URC transmission the ME will do the following:
• The ME activates its RING line (logic "1") for 1 second, i.e. the RING line changes to the physical "Low" level.
This allows the TE to stay in power saving mode until an ME related event requests service.
If several URCs occur coincidently or in quick succession each URC triggers the RING line independently,
although the line will not be deactivated between each URC. As a result, the RING line may stay low for more
than 1 second.
If an incoming call is answered within less than 1 second (with ATA or if autoanswering is set to ATS0=1) than
the RING line will be deactivated earlier.
The "^SHUTDOWN" URC will not activate the RING line.
• If the AT command interface is busy a "BREAK" will be sent immediately but the URC will not be issued until
the line is free. This may happen if the URC is pending in the following cases:
- During the processing of an AT command (i.e. the time after the TE echoes back the first character "A" of
an AT command just sent by itself until the ME responds with "OK" or "ERROR").
- During a data call.
Please note that AT command settings may be necessary to enable in-band signaling, e.g. refer to AT+CMER
or AT+CNMI.
It is strongly recommended to use the multiplex mode to map logical communication channels onto the serial line
of the MC55i, for details refer to [5] and AT command AT+CMUX. Doing so it is possible to use one channel to still
process URCs while having a data call active on another.
For most of these messages, the ME needs to be configured whether or not to send a URC. Depending on the
AT command, the URC presentation mode can be saved to the user defined profile (see AT&W), or needs to be
activated every time you reboot the ME. Several URCs are not user definable, such as "^SYSSTART",
"^SYSSTART <text>", "^SHUTDOWN" and the Fax Class 2 URCs listed in Section 12.1, FAX parameters.
If autobauding is enabled (as factory default mode or set withAT+IPR=0), URCs generated after restart will be
output with 57600 bps until the ME has detected the current bit rate. The URCs "^SYSSTART", "^SYSSTART
<text>", however, are not presented at all. For details please refer to Section 4.7.1, Autobauding. To avoid prob-
lems we recommend to configure a fixed bit rate rather than using autobauding.
MC55i AT Command Set
1.8 Errors and Messages s
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1.8 Errors and Messages
The command result codes "+CME ERROR: <err>" and "+CMS ERROR: <err>" indicate errors related to mobile
equipment or network functionality.
The format of <err> can be either numeric or verbose and is selectable via AT+CMEE.
A result error code terminates the execution of the command and prevents the execution of all remaining com-
mands that may follow on the same command line. If so, neither "ERROR" nor "OK" result codes are returned
for these commands. A 30 seconds timeout will deliver "ERROR" when the input of a command is not complete.
Using the wrong command syntax may result in errors: For example, using the execute command syntax
although the command has no execute format, causes "ERROR" to be returned. Likewise, using the write com-
mand syntax although the command has no write format causes "+CME ERROR: <err>" to be returned.
See also:
• Section 2.11.1, CME/CMS Error Code Overview
• Section 2.5.1, Verbose and numeric result codes
• Section 3.4, AT+CEER
MC55i AT Command Set
1.9 Second Serial Interface ASC1 s
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1.9 Second Serial Interface ASC1
The second serial interface ASC1 is designed as an auxiliary interface for applications which need multiple par-
allel access to the module (e.g. to query status information on ASC1 while a data connection is in progress on
ASC0). Therefore the second interface provides only limited functionality:
• Multiplex mode according to GSM 07.10 and 3G TS 27.010 is not supported on ASC1.
• DTR, DSR, DCD, RING hardware lines do not exist on ASC1. AT commands for controlling the behavior of
these lines (AT&D, AT&C, AT&S) are not allowed and return ERROR.
• No presentation of ^SYSSTART URCs on ASC1. After restart or reset of the ME, either check that the URC
has been sent on ASC0 or wait approximately 3 seconds before entering the first AT command on ASC1.
• No CSD calls, so all related AT commands cannot be used and return ERROR, such as AT+CBST, ATS7,
AT+CRLP.
• No fax calls, so all AT+F commands cannot be used and return ERROR.
• When you set up packet switched connections take care that your application uses only AT commands,
parameters and signal lines supported on the ASC1 interface. For example, keep in mind that Microsoft Dial-
up connections are typically trying to request the DCD line status and that common modem drivers use to
send commands such as AT+CBST, ATS7 (not supported on ASC1).
• No Autobauding. The hardware is not capable of automatically detecting the baudrate on this interface, so
the AT command which selects autobauding (AT+IPR=0) is not allowed and returns ERROR.
ASC1 is disabled when the multiplexer is enabled on the first serial interface ASC0. Yet, both ASC1 and the mul-
tiplexer channel 2 are using the same parameters, and thus, the same user defined profile (if any). As a result,
a user profile stored on multiplexer channel 2 takes effect on ASC1 after closing the multiplexer and starting up
ASC1. Likewise, a user profile stored on ASC1 will be loaded on multiplexer channel 2.
This may be a problem when ASC1 is not connected, but flow control (for example AT\Q1 or AT\Q3) is stored to
the user profile on the multiplexer channel 2. In this case, flow control takes effect on ASC1, when the multiplexer
is switched off. If then for example a large amount of URCs is generated, their transmission might be stopped
due to the flow control. To avoid this problem we recommend that you do not activate flow control on multiplexer
channel 2 when you set up a user profile with AT&W.
MC55i AT Command Set
1.10 Serial Interface Flow Control s
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1.10 Serial Interface Flow Control
Flow control is essential to prevent loss of data or avoid errors when, in a data or fax call, the sending device is
transferring data faster than the receiving side is ready to accept. When the receiving buffer reaches its capacity,
the receiving device should be capable to cause the sending device to pause until it catches up.
There are basically two approaches to regulate data flow: Software flow control and hardware flow control. The
High Watermark (HWM) of the input/output buffer should be set to approximately 60% of the total buffer size, the
Low Watermark (LWM) is recommended to be about 30%. The data flow should be stopped when the buffer
capacity rises close to the High Watermark and resumed when it drops below the Low Watermark. The time
required to cause stop and go results in a hysteresis between the High and Low Watermarks.
1.10.1 Software Flow Control (XON/OFF Handshake)
Software flow control can be used to control the data flow in both directions from DTE to MC55i and from MC55i
to DTE. Software flow control uses different characters to stop (XOFF, decimal 19) and resume (XON, decimal
17) data flow. Hence, all data that represent XON or XOFF characters will be interpreted as control characters.
This applies also to characters included within the data stream to be transmitted (usually plain ASCII text files do
not inlude such characters). The only advantage of software flow control is that three wires would be sufficient
on the serial interface.
1.10.2 Hardware Flow Control (RTS/CTS Handshake)
Hardware flow control sets or resets the RTS/CTS wires. This approach is faster and more reliable, and there-
fore, the better choice. When the HWM is reached, CTS is set inactive. When the LWM is passed, CTS goes
active again. To achieve smooth data flow, ensure that the RTS/CTS lines are present on your application plat-
form.
Configuring hardware flow control
• Hardware flow control must be set on both sides: with AT\Q3 in the ME and an equivalent RTS/CTS hand-
shake option in the host application.
• The default setting of the ME is AT\Q0 (no flow control) which must be altered to AT\Q3 (RTS/CTS hardware
handshake on). The setting is stored volatile and must be restored each time after rebooting the ME.
•AT\Q has no read command. To verify the current setting of AT\Q, simply check the settings of the active
profile with AT&V.
• Often, fax programs run an intialization procedure when started up. The intialization commonly includes
enabling RTS/CTS hardware handshake, eliminating the need to set AT\Q3 once again. However, before set-
ting up a CSD call, you are advised to check that RTS/CTS handshake is set.
Buffer design considerations
• After deactivating the RTS line, the ME may still send up to 264 bytes (worst case). This can be easily handled
if the buffer of the host application is sufficiently sized, and if a hysteresis is implemented regarding its Rx
buffer. For host applications that are required to handle a large amount of data at high speed, a total buffer
capacity of 512 bytes is recommended.
MC55i AT Command Set
1.11 Common PCN Handset Specification (CPHS) s
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1.11 Common PCN Handset Specification (CPHS)
The ME provides features to implement a device following the prerequisites of the Common PCN Handset Spec-
ification (CPHS) Phase 2.
CPHS Feature Description/Remarks AT command
Alternate Line Service Using two phone numbers with one SIM card. AT^SALS
Voice Message Waiting
Indication
Indicate the receipt of a short message coded as Voice Mes-
sage Waiting Indicator as defined by the CPHS Phase 2
standard.
AT^SIND,
AT+CMER, indicators
"vmwait1" and
"vmwait2"
Operator (Service pro-
vider) name from SIM
Read specific Elementary Files (6F14h, 6F18h) from SIM. AT+CRSM
Network and Service Pro-
vider Lock
Lock/Unlock an ME to specific HPLMN and service provider. AT+CLCK,
(AT+CPIN)
Call Forwarding Get and set diverted call status. Access specific Elementary
File (6F13h) from SIM. AT+CCFC, AT+CRSM
Customer Service Profile
(CSP)
Setting services and their menu entries depending on cus-
tomer profiles. AT+CRSM
Information numbers Hierarchically structured service numbers phonebook on
SIM according to CPHS 4.2 (mandatory). AT+CRSM
MC55i AT Command Set
2. Configuration Commands s
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2. Configuration Commands
The AT Commands described in this chapter allow the external application to determine the MC55i's behaviour
under various conditions.
2.1 AT&F Set all current parameters to manufacturer defaults
AT&F sets all current parameters to the manufacturer defined profile. All defined GPRS contexts which are not
activated or not online will be undefined (see AT+CGDCONT).
Syntax
Parameter Description
[0] Set all TA parameters to manufacturer defaults
Notes
• List of parameters reset to manufacturer default can be found in Section 20.6, Factory Default Set-
tings Restorable with AT&F.
• In addition to the default profile, you can store an individual one with AT&W. To alternate between the two pro-
files enter either ATZ (loads user profile) or AT&F (restores factory profile).
• Every ongoing or incoming call will be terminated.
Exec Command
AT&F[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)
MC55i AT Command Set
2.2 AT&V s
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2.2 AT&V Display current configuration
AT&V returns the current parameter setting. The configuration varies depending on whether or not PIN authen-
tication has been done and whether or not Multiplex mode is enabled (see AT+CMUX).
Syntax
Parameter Description
[0] Profile number
Notes
• The parameters of AT^SMGO can only be displayed after the SMS data from the SIM have been read success-
fully for the first time. Reading starts after successful SIM authentication has been performed, and may take
up to 30 seconds depending on the SIM used. While the read process is in progress, an attempt to read the
parameter will result in empty values.
• The parameter of AT+CSDH will only be displayed in SMS PDU mode, see AT+CMGF.
Exec Command
AT&V[<value>]
Response(s)
ACTIVE PROFILE:
... (see Section 2.2.1, AT&V responses)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + ± + ± ± - - -
<value>(num)
MC55i AT Command Set
2.2 AT&V s
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2.2.1 AT&V responses
The following tables show four different kinds of responses depending on whether or not the PIN is entered and
whether or not the Multiplex mode is enabled (see AT+CMUX).
Table 2.1: Current configuration on ASC0 / MUX channel 1 (example)
Table 2.2: Current configuration on ASC1 and MUX channels 2 and 3 (example)
PIN authentication done No PIN authentication
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060 S8:000
S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+CRC: 0
+CMGF: 1
+CSDH: 0
+CNMI: 0,0,0,0,1
+ILRR: 0
+IPR: 57600
+CMEE: 2
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,"000000","000000"
^SLCC: 0
^SCKS: 0,1
+CREG: 0,1
+CLIP: 0,2
+CAOC: 0
+COPS: 0,0,"operator"
+CGSMS: 3
OK
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060 S8:000
S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+ILRR: 0
+IPR: 57600
+CMEE: 2
^SCKS: 0,1
OK
PIN authentication done No PIN authentication
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D0 &S0 \Q0
S0:000 S3:013 S4:010 S5:008
+CR: 0
+CRC: 0
+CMGF: 1
+CSDH: 0
+CNMI: 0,0,0,0,1
+ILRR: 0
+IPR: 57600
+CMEE: 2
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,"000000","000000"
^SLCC: 0
^SCKS: 0,1
+CREG: 0,1
+CLIP: 0,2
+CAOC: 0
+COPS: 0,0,"operator"
+CGSMS: 3
OK
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D0 &S0 \Q0
S0:000 S3:013 S4:010 S5:008
+CR: 0
+ILRR: 0
+IPR: 57600
+CMEE: 2
^SCKS: 0,1
+CGSMS: 3
OK
MC55i AT Command Set
2.3 AT&W s
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2.3 AT&W Stores current configuration to user defined profile
AT&W stores the currently set parameters to a user defined profile in the non-volatile memory.
Syntax
Parameter Description
[0] Number of profile
Notes
• The user defined profile will be restored automatically after power-up. Use ATZ to restore user profile and
AT&F to restore factory settings. Until the first use of AT&W, ATZ works as AT&F.
•AT&W stores all global settings and the current local settings of the interface, on which the command is exe-
cuted.
• A list of parameters stored to the user profile can be found in Section 20.5, AT Command Settings stor-
able with AT&W.
Exec Command
AT&W[<value>]
Response(s)
OK
ERROR/+CME ERROR <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)
MC55i AT Command Set
2.4 ATQ s
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2.4 ATQ Set result code presentation mode
This parameter setting determines whether or not the TA transmits any result code to the TE. Information text
transmitted in response is not affected by this setting.
Syntax
Parameter Description
[0](&F) DCE transmits result code
1 Result codes are suppressed and not transmitted
Exec Command
ATQ[<n>]
Response(s)
If <n>=0:
OK
If <n>=1:
(none)
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
2.5 ATV s
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2.5 ATV Set result code format mode
This command determines the contents of header and trailer transmitted with AT command result codes and
information responses. Possible responses are described in Section 2.5.1, Verbose and numeric result codes.
Syntax
Parameter Description
[0] Information response: <text><CR><LF>
Short result code format: <numeric code><CR>
1(&F) Information response: <CR><LF><text><CR><LF>
Long result code format: <CR><LF><verbose code><CR>
2.5.1 Verbose and numeric result codes
Exec Command
ATV[<value>]
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)(&W)(&V)
Verbose format Numeric format Meaning
OK 0Command executed, no errors
CONNECT 1Link established
RING 2Ring detected
NO CARRIER 3Link not established or disconnected
ERROR 4Invalid command or command line too long
NO DIALTONE 6No dial tone, dialling impossible, wrong mode
BUSY 7Remote station busy
CONNECT 2400/RLP 47 Link with 2400 bps and Radio Link Protocol
CONNECT 4800/RLP 48 Link with 4800 bps and Radio Link Protocol
CONNECT 9600/RLP 49 Link with 9600 bps and Radio Link Protocol
CONNECT 14400/RLP 50 Link with 14400 bps and Radio Link Protocol
ALERTING Alerting at called phone
DIALING Mobile phone is dialing
MC55i AT Command Set
2.6 ATX s
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2.6 ATX Set CONNECT result code format and call monitoring
ATX determines whether or not the TA detects the presence of dial tone and busy signal and whether or not TA
transmits particular result codes.
Syntax
Parameter Description
[0] CONNECT result code only returned, dial tone and busy detection are both dis-
abled.
1 CONNECT <text> result code only returned, dial tone and busy detection are
both disabled.
2 CONNECT <text> result code returned, dial tone detection is enabled, busy
detection is disabled.
3 CONNECT <text> result code returned, dial tone detection is disabled, busy
detection is enabled.
4(&F) CONNECT <text> result code returned, dial tone and busy detection are both
enabled.
Exec Command
ATX[<value>]
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)(&W)(&V)
MC55i AT Command Set
2.7 ATZ s
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2.7 ATZ Set all current parameters to user defined profile
ATZ sets all current parameters to the user profile stored with AT&W. If a connection is in progress, it will be ter-
minated.
All defined GPRS contexts which are not activated or not online will be undefined (see AT+CGDCONT).
The user defined profile is stored to the non-volatile memory.
Syntax
Parameter Description
[0] Reset to user profile
Notes
• First the profile will be set to factory default (see AT&F). If there is a valid user profile (stored with AT&W), this
profile will be loaded afterwards.
• Any additional commands on the same command line may be ignored. A delay of 300 ms is required before
next command is sent, otherwise "OK" response may be corrupted.
Exec Command
ATZ[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)
MC55i AT Command Set
2.8 AT+CFUN s
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2.8 AT+CFUN Set phone functionality
The AT+CFUN command serves to control the functionality level of the ME. It can be used to reset the ME, to
choose one of the SLEEP modes or to return to full functionality.
Intended for power saving, SLEEP mode reduces the functionality of the ME to a minimum and thus minimizes
the current consumption. Further information, particularly power supply ratings during the various operating
modes and the timing of hardware signals in SLEEP mode can be found in the "MC55i Hardware Interface
Description, Version 01.003".
SLEEP mode falls in two categories:
• NON-CYCLIC SLEEP mode <fun>=0
• and CYCLIC SLEEP modes, selectable as <fun>= 5, 6, 7, 8 or 9.
NON-CYCLIC SLEEP mode permanently blocks the serial interface. The CYCLIC SLEEP mode, however, is a
dynamic process which alternatingly enables and disables the serial interface. The major benefit of all CYCLIC
SLEEP modes is that the serial interface remains accessible and that, in intermittent wake-up periods, characters
can be sent or received without terminating the selected mode. The best choice is using <fun>= 7, 8 or 9, since
in these modes MC55i automatically resumes power saving, after you have sent or received a short message or
made a call. <fun>=5 or 6 do not offer this feature to the same extent and are only supported for compatibility
with earlier releases. In all CYCLIC SLEEP modes, you can enter <fun>=1 to permanently wake up MC55i and
take it back to full functionality. Please refer to Section 2.8.1, Wake up the ME from SLEEP mode for a summary
of all SLEEP modes and the different ways of waking up the module.
For CYCLIC SLEEP mode (<fun>= 5, 6, 7, 8 or 9) both the ME and the application must be configured to use
hardware flow control. This is necessary since the CTS signal is set/reset every time when the ME listens to a
paging message from the base station. This is the way how the module indicates to the application when the
UART is active. For detailed information on the timing of the CTS signal refer to [2]. The default setting of hard-
ware flow control is AT\Q0 which must be altered to AT\Q3. For use after restart you are advised to add it to the
user profile saved with AT&W.
If both interfaces ASC0 and ASC1 are connected, hardware flow control must be set in either application. See
notes below for further detail.
The AT+CFUN test command returns the values of the supported parameters.
The AT+CFUN read command returns the current functionality value.
The AT+CFUN write command can be used to reset the ME, to choose one of the SLEEP modes or to return to
full functionality.
Syntax
Test Command
AT+CFUN=?
Response(s)
+CFUN: (list of supported <fun>s) , (list of supported <rst>s)
OK
Read Command
AT+CFUN?
Response(s)
+CFUN: <fun>
OK
Write Command
AT+CFUN=[<fun>[, <rst>]]
Response(s)
OK
ERROR
+CME ERROR
MC55i AT Command Set
2.8 AT+CFUN s
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Unsolicited Result Codes
URC 1
^SYSSTART
Indicates that the ME has been started and is ready to operate. If autobauding is active (AT+IPR=0) the URC
is not generated.
URC 2
^SYSSTART CHARGE ONLY MODE
Indicates that the ME has entered the CHARGE ONLY mode. This occurs if the charger is connected while
the ME is in POWER DOWN mode. If autobauding is active (AT+IPR=0) the URC is not generated. In
CHARGE ONLY mode the ME is neither registered to the GSM network nor are the serial interfaces fully
accessible. Only the AT commands listed in Section 20.4, Availability of AT Commands Depending
on Operating Mode of ME can be used. For further details on charging refer to the Hardware Interface
Description [2].
Parameter Description
0 NON-CYCLIC SLEEP mode:
In this mode, the AT interface is not accessible. Consequently, after setting
<fun>=0, do not send further characters. Otherwise these characters remain
in the input buffer and may delay the output of an unsolicited result code.
The first wake-up event stops power saving and takes the ME back to full func-
tionality level <fun>=1.
[1](&F)(P) Full functionality (no power saving).
If the ME is in one of the CYCLIC SLEEP modes you can issue AT+CFUN=1
to stop power saving and return to full functionality.
Keep in mind that, unlike the reset command described below, this action does
not restart the ME but only changes the level of functionality. See parameter
<rst> for details on the reset.
5 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If char-
acters are recognized on the serial interface, the ME stays active for 2 seconds
after the last character was sent or received.
6 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If char-
acters are recognized on the serial interface, the ME stays active for 10 min-
utes after the last character was sent or received.
To ensure that power saving takes effect immediately, the ME stays active for
only 2 seconds after <fun>=6 was entered.
7 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If char-
acters are recognized on the serial interface, the ME stays active for 2 seconds
after the last character was sent or received.
The ME exits SLEEP mode only, if AT+CFUN=1 is entered.
8 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If char-
acters are recognized on the serial interface, the ME stays active for 10 min-
utes after the last character was sent or received.
The ME exits SLEEP mode only, if AT+CFUN=1 is entered.
To ensure that power saving takes effect immediately, the ME stays active for
only 2 seconds after <fun>=8 was entered.
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + ± ± ± - - -
<fun>(num)
MC55i AT Command Set
2.8 AT+CFUN s
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9 CYCLIC SLEEP mode:
In this mode, the serial interface is shortly enabled while CTS is active. If char-
acters are recognized on the serial interface, the ME stays active after the last
character was sent or received for at least the time, which can be configured
by AT^SCFG="PowerSaver/Mode9/Timeout",<psm9to> (temporary wakeup).
In contrast to SLEEP modes 5,6,7 and 8 assertion of RTS can also be used to
temporarily wake up the ME. In this case too, activity time is at least the time
set with AT^SCFG="PowerSaver/Mode9/Timeout",<psm9to>. RTS can be
activated either from ASC0 or ASC1.
The ME exits SLEEP mode only, if AT+CFUN=1 is entered.
The parameter can only be used if the serial interface is enabled.
Due to the command syntax, you need to enter parameter <fun>, followed by <rst>, where <fun> is only a
placeholder and has no effect. See examples below.
[0] Placeholder for <fun> as stated above.
1 ME resets and restarts to full functionality. After reset and restart, PIN 1
authentication is necessary (AT+CPIN). If autobauding is enabled, it is recom-
mended to wait 3 to 5 seconds before entering the first AT command. For
details on autobauding refer to Section 4.7.1, Autobauding.
Notes
• The settings made with AT+CFUN apply to both serial interfaces ASC0 and ASC1.
• CYCLIC SLEEP mode cannot be activated or resumed as long as data are buffered in one of the output buff-
ers of the ME (ASC0 or ASC1). This should be taken into account, because RTS may be unintentionally
asserted if, for example, one of the following scenarios occurs:
a) Hardware flow control is set in the ME (AT\Q3), but not in the host application (RTS/CTS handshake).
b) The two serial interfaces ASC0 and ASC1 are connected, but one of them is released, e.g. after closing or
deactivating the application connected to this interface.
In cases a) and b) data sent by the ME, such as URCs or outstanding AT command responses, will be buff-
ered in the output buffer of this interface, signalized by the active RTS line until the buffer is emptied.
Therefore, for CYCLIC SLEEP mode to work properly take care that the following requirements be met: Be
sure that data sent by the ME are collected on both interfaces. Activate hardware flow control on ME (TA) and
application side (TE). Avoid releasing one of the interfaces if any URCs are likely to occur on this interface.
• CYCLIC SLEEP mode cannot be activated or resumed as long as data is buffered in one of the output buffers
of the ME (ASC0 or ASC1). Therefore, ensure that the following requirements be met:
a) If hardware flow control is set in the ME (AT\Q3), the host must also use hardware flow control.
b) Remember that AT\Q3 takes effect only on the interface where the command was set. Therefore, if both
interfaces ASC0 and ASC1 are connected ensure to set AT\Q3 on each interface. However, if only one inter-
face shall be operated ensure that, on the unused interface, AT\Q3 is neither enabled and nor stored to the
AT&W user profile. This is necessary to avoid that URCs, outstanding AT command responses or, after restart
even the "^SYSSTART" URC might be buffered on the unused interface without being collected by the host
application.
• In Multiplex mode, the CFUN profile is shared by all multiplexer channels.
• If the ME is in Multiplexer mode, it is not recommended to activate SLEEP mode with AT+CFUN=<fun>. The
best approach to properly control SLEEP mode in this case is to issue the PSC messages described in [5],
Section "Power saving control".
• When a circuit-switched call is in progress, <fun>=7 or 8 or 9 can be activated without terminating the call.
However, setting <fun>=0, 5 or 6 during a circuit-switched call immediately disconnects this call.
• Please keep in mind that power saving works properly only when PIN authentication has been done. If you
attempt to activate power saving while the SIM card is not inserted or the PIN is not correctly entered, the
selected <fun> level will be set, though power saving does not take effect. For the same reason, power sav-
ing cannot be used if MC55i operates in Alarm mode. Furthermore, in order to accept incoming calls, SMS or
network related URCs in SLEEP mode the ME must be registered when it enters the SLEEP mode.
<rst>(num)
MC55i AT Command Set
2.8 AT+CFUN s
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• To check whether power saving is on, you can query the status with the read command AT+CFUN? only if
the module is in full functionality mode or in CYCLIC SLEEP mode. If available, you can also take advantage
of the status LED controlled by the SYNC pin (see AT^SSYNC and [2]). The LED remains "off" while the mod-
ule is in any of the SLEEP modes. However, the module can wake up temporarily from power saving without
leaving its CYCLIC SLEEP mode (without changing +CFUN "<fun>"), e.g. for a network scan after a loss of
radio coverage, or after receipt of serial data during CYCLIC SLEEP mode. During this "temporary wakeup
state" the LED will operate as if the ME was in full functionality mode.
• Recommendation: In NON-CYCLIC SLEEP mode, you can set an RTC alarm to wake up the ME and return
to full functionality. This is a useful approach because, in this mode, the AT interface is not accessible.
Examples
EXAMPLE 1
To check the level of functionality use the read command:
Remember that the AT interface is notaccessible in NON-CYCLIC SLEEP mode. Consequently, the read
command is only useful when the ME is set to full functionality or, when <fun> is set to 5, 6, 7, 8 or 9.
EXAMPLE 2
To set the ME to NON-CYCLIC SLEEP mode enter
When, for example, an SMS is being received and indicated by an unsolicited result code (URC), the ME
wakes up to full operation.
After this, you may want to verify the operating status:
EXAMPLE 3
To stop CYCLIC SLEEP mode and return to full functionality:
Remember that this approach is not applicable to the NON-CYCLIC SLEEP mode (since the serial interface
is disabled). The NON-CYCLIC SLEEP mode ends with the first wake-up event.
EXAMPLE 4
To reset and restart the ME:
AT+CFUN?
+CFUN: 1
Default mode after ME was restarted
AT+CFUN?
+CFUN: 5
CYCLIC SLEEP mode
AT+CFUN=0
OK
+CMTI: "SM",5
Note that the URC used in this example will appear only, if
AT+CNMI=1,1 was configured before.
AT+CFUN?
+CFUN: 1
Indicates that ME has entered full functionality mode.
AT+CFUN?
+CFUN: 5
OK
AT+CFUN=1
OK
AT+CFUN=1,1
or alternatively, AT+CFUN=0,1 or 5,1 or 6,1 or 7,1 or 8,1 or 9,1
OK
^SYSSTART
The ^SYSSTART URC confirms that the ME has been rebooted. Note
that ^SYSSTART appears only if AT+IPR ≠ 0. If the ME is in autobaud
mode, it is recommended to wait 3 to 5 seconds before entering the first
AT command. Remember to enter the SIM PIN after restart.
MC55i AT Command Set
2.8 AT+CFUN s
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2.8.1 Wake up the ME from SLEEP mode
A wake-up event is any event that causes the ME to draw more current. Depending on the selected mode, the
wake-up event either switches the SLEEP mode off and takes the ME back to full functionality AT+CFUN=1, or
activates the ME temporarily without terminating the selected SLEEP mode.
Definitions of the state transitions described in Table 2.3:
• Quit: ME exits SLEEP mode.
• Temporary: ME becomes active temporarily for the duration of the event and the mode-specific follow-up time
after the last character was sent or received on the serial interface.
• No effect: Event is not relevant in the selected SLEEP mode. The ME does not wake up.
Table 2.3: Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes
Event Selected mode:
<fun>=0
Selected mode:
<fun>=5 or 6
Selected mode:
<fun>=7 or 8 or 9
Ignition line No effect No effect No effect
RTS0 or RTS1 activation Quit No effect (RTS is only
used for flow control)
Mode 7 and 8: No effect
(RTS is only used for flow
control)
Mode 9: Temporary
Unsolicited Result Code
(URC)
Quit Quit Temporary
Incoming voice or data
call
Quit Quit Temporary
Any AT command (incl.
outgoing SMS, voice or
data call)
Not possible (UART dis-
abled)
Temporary Temporary
Incoming SMS (AT+CNMI
is set to 0,0 (this is the
default setting)
No effect No effect No effect
Incoming SMS (AT+CNMI
is set to 1,1)
Quit Quit Temporary
GPRS data transfer Not possible (UART dis-
abled)
Temporary Temporary
RTC alarm line Quit Quit Temporary
AT+CFUN=1 Not possible (UART dis-
abled)
Quit Quit
MC55i AT Command Set
2.9 AT^SMSO s
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2.9 AT^SMSO Switch off mobile station
AT^SMSO initiates the power-off procedure. Low level of the module's VDD pin and the URC "^SHUTDOWN" notify
that the procedure has completed and the module has entered the POWER DOWN mode. Therefore, be sure
not to disconnect the operating voltage until VDD is low or until the URC "^SHUTDOWN" is displayed. Otherwise,
you run the risk of losing data. For further details on how to turn off the module see the [2].
Syntax
Unsolicited Result Code
^SHUTDOWN
Indicates that the power-off procedure is finished and the module will be switched off in less than 1 second.
Notes
• Do not send any other AT command after AT^SMSO.
• If AT^SMSO is entered on one of the Multiplexer channels the ME closes the Multiplexer channels, terminates
the Multiplexer and deactivates all other functions. Then, the URC "^SHUTDOWN" will be issued on the phys-
ical serial interface (ASC0). The URC will be transmitted at the bit rate last activated on ASC0 for use with
the Multiplex driver.
• If both interfaces ASC0 and ASC1 are connected the URC appears on both of them.
Test Command
AT^SMSO=?
Response(s)
OK
Exec Command
AT^SMSO
Response(s)
^SMSO: MS OFF
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + + + +
MC55i AT Command Set
2.10 AT+GCAP s
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2.10 AT+GCAP Request complete TA capabilities list
AT+GCAP returns a list of additional capabilities.
Syntax
Parameter Description
e.g.: +CGSM,+FCLASS
Note
• +CGSM: The response text shows which GSM commands of the ETSI standard are supported.
Test Command
AT+GCAP=?
Response(s)
OK
Exec Command
AT+GCAP
Response(s)
+GCAP: <name>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<name>(str)
MC55i AT Command Set
2.11 AT+CMEE s
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2.11 AT+CMEE Mobile Equipment Error Message Format
AT+CMEE controls the format of the error result codes that indicates errors related to MC55i functionality. Format
can be selected between plain "ERROR" output, error numbers or verbose "+CME ERROR: <err>" and "+CMS
ERROR: <err>" messages.
Possible error result codes are listed in Table 2.4, General "CME ERROR" Codes (GSM 07.07)Table 2.5, Gen-
eral "CME ERROR" Codes (SIEMENS)Table 2.6, GPRS related "CME ERROR" Codes (GSM 07.07) and Table
2.7, SMS related "CMS ERROR" Codes (GSM 07.05).
In multiplex mode (refer AT+CMUX) the setting applies only to the logical channel where selected. The setting on
the other channels may differ.
Syntax
Parameter Description
0(&F)(D) Disable result code, i.e. only "ERROR" will be displayed.
1 Enable error result code with numeric values.
2 Enable error result code with verbose (string) values.
Example
To obtain enhanced error messages it is recommended to choose <errMode>=2.
Test Command
AT+CMEE=?
Response(s)
+CMEE: (list of supported<errMode>s)
OK
Read Command
AT+CMEE?
Response(s)
+CMEE: <errMode>
OK
Write Command
AT+CMEE=<errMode>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<errMode>(num)(&W)(&V)
AT+CMEE=2
OK
MC55i AT Command Set
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2.11.1 CME/CMS Error Code Overview
Table 2.4: General "CME ERROR" Codes (GSM 07.07)
<err> Code Text (if AT+CMEE=2)
0 phone failure
1 no connection to phone
2 phone-adapter link reserved
3 Operation not allowed
4 Operation not supported
5 PH-SIM PIN required
6 PH-FSIM PIN required
7 PH-FSIM PUK required
10 SIM not inserted
11 SIM PIN required
12 SIM PUK required
13 SIM failure
14 SIM busy
15 SIM wrong
16 Incorrect password
17 SIM PIN2 required
18 SIM PUK2 required
20 Memory full
21 invalid index
22 not found
23 Memory failure
24 text string too long
25 invalid characters in text string
26 dial string too long
27 invalid characters in dial string
30 no network service
31 Network timeout
32 Network not allowed emergency calls only
40 Network personalization PIN required
41 Network personalization PUK required
42 Network subset personalization PIN required
43 Network subset personalization PUK required
44 service provider personalization PIN required
45 service provider personalization PUK required
46 Corporate pe sonalization PIN required
47 Corporate personalization PUK required
48 Master Phone Code required
100 unknown
132 service option not supported
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Table 2.5: General "CME ERROR" Codes (SIEMENS)
Table 2.6: GPRS related "CME ERROR" Codes (GSM 07.07)
Table 2.7: SMS related "CMS ERROR" Codes (GSM 07.05)
133 requested service option not subscribed
134 service option temporarily out of order
256 Operation temporary not allowed
257 call barred
258 phone busy
259 user abort
260 invalid dial string
261 ss not executed
262 SIM blocked
263 Invalid Block
<err> Code Text (if AT+CMEE=2)
615 network failure
616 network is down
639 service type not yet available
640 operation of service temporary not allowed
764 missing input value
765 invalid input value
767 operation failed
<err> Code Text (if AT+CMEE=2)
103 Illegal MS
106 Illegal ME
107 GPRS services not allowed
111 PLMN not allowed
112 Location area not allowed
113 Roaming not allowed in this location area
148 unspecified GPRS error
149 PDP authentication failure
150 invalid mobile class
<err> Code Text (if AT+CMEE=2)
1 Unassigned (unallocated) number
8 Operator determined barring
10 Call barred
21 Short message transfer rejected
27 Destination out of service
28 Unidentified subscriber
29 Facility rejected
30 Unknown subscriber
<err> Code Text (if AT+CMEE=2)
MC55i AT Command Set
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38 Network out of order
41 Temporary failure
42 Congestion
47 Resources unavailable, unspecified
50 Requested facility not subscribed
69 Requested facility not implemented
81 Invalid short message transfer reference value
95 Invalid message, unspecified
96 Invalid mandatory information
97 Message type non-existent or not implemented
98 Message not compatible with short message protocol state
99 Information element non-existent or not implemented
111 Protocol error, unspecified
127 Interworking, unspecified
128 Telematic interworking not supported
129 Short message Type 0 not supported
130 Cannot replace short message
143 Unspecified TP-PID error
144 Data coding scheme (alphabet) not supported
145 Message class not supported
159 Unspecified TP-DCS error
160 Command cannot be actioned
161 Command unsupported
175 Unspecified TP-Command error
176 TPDU not supported
192 SC busy
193 No SC subscription
194 SC system failure
195 Invalid SME address
196 Destination SME barred
197 SM Rejected-Duplicate SM
198 TP-VPF not supported
199 TP-VP not supported
208 D0 SIM SMS storage full
209 No SMS storage capability in SIM
210 Error in MS
211 Memory Capacity Exceeded
212 SIM Application Toolkit Busy
213 SIM data download error
255 Unspecified error cause
300 ME failure
301 SMS service of ME reserved
<err> Code Text (if AT+CMEE=2)
MC55i AT Command Set
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302 Operation not allowed
303 Operation not supported
304 Invalid PDU mode parameter
305 Invalid text mode parameter
310 SIM not inserted
311 SIM PIN required
312 PH-SIM PIN required
313 SIM failure
314 SIM busy
315 SIM wrong
316 SIM PUK required
317 SIM PIN2 required
318 SIM PUK2 required
320 Memory failure
321 Invalid memory index
322 Memory full
330 SMSC address unknown
331 no network service
332 Network timeout
340 NO +CNMA ACK EXPECTED
500 Unknown error
512 User abort
513 unable to store
514 invalid status
515 invalid character in address string
516 invalid length
517 invalid character in pdu
518 invalid parameter
519 invalid length or character
520 invalid character in text
521 timer expired
522 Operation temporary not allowed
<err> Code Text (if AT+CMEE=2)
MC55i AT Command Set
2.12 AT+CSCS s
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2.12 AT+CSCS Select TE character set
The AT+CSCS write command informs the TA which character set <chset> is used by the TE. This enables the
TA to convert character strings correctly between TE and ME character sets. See also Section 1.5, Supported
character sets.
Note that when the TA-TE interface is set to 8-bit operation and the used TE alphabet is 7-bit, the highest bit will
be set to zero.
Syntax
Parameter Description
“GSM“(&F)(P) GSM default alphabet (GSM 03.38 subclause 6.2.1);
Note: This setting may cause software flow control problems since the codes
used to stop and resume data flow (XOFF = decimal 19, XON = decimal 17)
are interpreted as normal characters.
“UCS2“ 16-bit universal multiple-octet coded character set (ISO/IEC10646 [32]); UCS2
character strings are converted to hexadecimal numbers from 0000 to FFFF;
e.g. "004100620063" equals three 16-bit characters with decimal values 65, 98
and 99.
Test Command
AT+CSCS=?
Response(s)
+CSCS: (list of supported<chset>s)
OK
Read Command
AT+CSCS?
Response(s)
+CSCS: <chset>
OK
Write Command
AT+CSCS=[<chset>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 11.11 - + + + + + - - -
<chset>(str)
MC55i AT Command Set
2.13 AT^SCFG s
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2.13 AT^SCFG Extended Configuration Settings
AT^SCFG can be used to query and configure various settings of the MC55i.
The AT^SCFG read command returns a list of all supported parameters and their current values.
The AT^SCFG write command queries a configuration parameter (if no value is entered) or sets its value(s).
Input of parameter names is always coded in GSM characterset, parameter values are expected to be given as
specified via AT+CSCS.
The following error messages may be returned by the AT^SCFG write commands:
•"+CME ERROR: operation temporary not allowed"
Change of parameter value(s) temporarily not allowed.
•"+CME ERROR: invalid index"
Invalid parameter name or value(s).
•"+CME ERROR: invalid characters in text string"
Character set conversion of parameter value(s) failed.
•"+CME ERROR: memory failure"
Could not allocate necessary memory or storing a parameter failed.
•"+CME ERROR: operation not allowed"
Change of parameter value(s) not allowed
•"+CME ERROR: unknown"
Other error
Syntax
Test Command
AT^SCFG=?
Response(s)
^SCFG: "Audio/AMR", (list of supported <amr>s)
^SCFG: "Audio/Loop", (list of supported <al>s)
^SCFG: "Call/SpeechVersion1", (list of supported <csv1>s)
^SCFG: "GPRS/ATS0/withAttach", (list of supported <gs0aa>s)
^SCFG: "GPRS/RingOnIncomingData", (list of supported <groid>s)
^SCFG: "PowerSaver/Mode9/Timeout", (list of supported <psm9to>s)
^SCFG: "Radio/Band/HandOver", (list of supported <HandOverStatus>s)
^SCFG: "Tcp/IRT", (list of supported <tcpIrt>)
^SCFG: "Tcp/MR", (list of supported <tcpMr>)
^SCFG: "Tcp/OT", (list of supported <tcpOt>)
^SCFG: "Tcp/WithURCs", (list of supported <tcpWithUrc>)
^SCFG: "URC/CallStatus/CIEV", (list of supported <succ>s)
^SCFG: "URC/CallStatus/SLCC", (list of supported <sucs>s)
^SCFG: "URC/Datamode/Ringline", (list of supported <udri>s)
^SCFG: "URC/Ringline", (list of supported <uri>s)
^SCFG: "URC/Ringline/ActiveTime", (list of supported <urat>s)
OK
Read Command
AT^SCFG?
Response(s)
^SCFG: "Audio/AMR", <amr>1[, <amr>2[, <amr>3...[<amr>10]]]
^SCFG: "Audio/Loop", <al>
^SCFG: "Call/SpeechVersion1", <csv1>
^SCFG: "GPRS/ATS0/withAttach", <gs0aa>
^SCFG: "GPRS/RingOnIncomingData", <groid>
^SCFG: "PowerSaver/Mode9/Timeout", <psm9to>
^SCFG: "Radio/Band/HandOver", <HandOverStatus>
^SCFG: "Tcp/IRT", <tcpIrt>
MC55i AT Command Set
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^SCFG: "Tcp/MR", <tcpMr>
^SCFG: "Tcp/OT", <tcpOt>
^SCFG: "Tcp/WithURCs", <tcpWithUrc>
^SCFG: "URC/CallStatus/CIEV", <succ>
^SCFG: "URC/CallStatus/SLCC", <sucs>
^SCFG: "URC/Datamode/Ringline", <udri>
^SCFG: "URC/Ringline", <uri>
^SCFG: "URC/Ringline/ActiveTime", <urat>
OK
Write Command
Adaptive Multi Rate (AMR):
AT^SCFG="Audio/AMR"[, <amr>]
Response(s)
^SCFG: "Audio/AMR", <amr>1[, <amr>2[, <amr>3...[<amr>10]]]
OK
ERROR
+CME ERROR
Write Command
Configure Audio Loop:
AT^SCFG="Audio/Loop"[, <al>]
Response(s)
^SCFG: "Audio/Loop", <al>
OK
ERROR
+CME ERROR
Write Command
Query/Configure SpeechVersion1
AT^SCFG="Call/SpeechVersion1"[, <csv1>]
Response(s)
^SCFG: "Call/SpeechVersion1", <csv1>
OK
ERROR
+CME ERROR
Write Command
GPRS ATS0 with automatic attach
AT^SCFG="GPRS/ATS0/withAttach"[, <gs0aa>]
Response(s)
^SCFG: "GPRS/ATS0/withAttach", <gs0aa>
OK
ERROR
+CME ERROR
Read Command (Continued)
AT^SCFG?
Response(s)
MC55i AT Command Set
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Write Command
Ring on incoming GPRS IP data packets
AT^SCFG="GPRS/RingOnIncomingData"[, <groid>]
Response(s)
^SCFG: "GPRS/RingOnIncomingData", <groid>
OK
ERROR
+CME ERROR
Write Command
Query/Set timeout value for power saving mode 9
AT^SCFG="PowerSaver/Mode9/Timeout"[, <psm9to>]
Response(s)
^SCFG: "PowerSaver/Mode9/Timeout", <psm9to>
OK
ERROR
+CME ERROR
Write Command
Control Special Call Handover Setting
AT^SCFG="Radio/Band/HandOver"[, <HandOverStatus>]
Response(s)
^SCFG: "Radio/Band/HandOver", <HandOverStatus>
OK
ERROR
+CME ERROR
Write Command
Network selection mode
AT^SCFG="Radio/NWSM"[, <NetworkSelectionMode>]
Response(s)
^SCFG: "Radio/NWSM", <NetworkSelectionMode>
OK
ERROR
+CME ERROR
Write Command
Configuration of TCP parameter 'InitialRetransmissionTimeout':
AT^SCFG="Tcp/IRT"[, <tcpIrt>]
Response(s)
^SCFG: "Tcp/IRT", <tcpIrt>
OK
ERROR
+CME ERROR
Write Command
Configuration of TCP parameter 'MaxRetransmissions':
AT^SCFG="Tcp/MR"[, <tcpMr>]
Response(s)
^SCFG: "Tcp/MR", <tcpMr>
OK
ERROR
+CME ERROR
MC55i AT Command Set
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Write Command
Configuration of TCP parameter 'OverallTimeout':
AT^SCFG="Tcp/OT"[, <tcpOt>]
Response(s)
^SCFG: "Tcp/OT", <tcpOt>
OK
ERROR
+CME ERROR
Write Command
Configuration of Internet Service URCs:
AT^SCFG="Tcp/WithURCs"[, <tcpWithUrc>]
Response(s)
^SCFG: "Tcp/WithURCs", <tcpWithUrc>
OK
ERROR
+CME ERROR
Write Command
Configuration of URC "+CIEV: call" Call Status Indication
AT^SCFG="URC/CallStatus/CIEV"[, <succ>]
Response(s)
^SCFG: "URC/CallStatus/CIEV", <succ>
OK
ERROR
+CME ERROR
Write Command
Configuration of URC "^SLCC" Call Status Indication
AT^SCFG="URC/CallStatus/SLCC"[, <sucs>]
Response(s)
^SCFG: "URC/CallStatus/SLCC", <sucs>
OK
ERROR
+CME ERROR
Write Command
URC indication in datamode via Ring line:
AT^SCFG="URC/Datamode/Ringline"[, <udri>]
Response(s)
^SCFG: "URC/Datamode/Ringline", <udri>
OK
ERROR
+CME ERROR
Write Command
URC indication via Ring line:
AT^SCFG="URC/Ringline"[, <uri>]
Response(s)
^SCFG: "URC/Ringline", <uri>
OK
ERROR
+CME ERROR
MC55i AT Command Set
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Parameter Description
Adaptive Multi Rate
This parameter can be used to control the usage of the feature "Adaptive Multi Rate" (AMR). It is possible to
enable or disable this feature for all network operators, or to enable it for selected operators (max. 10). If the
feature is enabled for all operators, any request to enable it for a specific operator will result in a "+CME ERROR:
operation temporary not allowed".
Changes of this parameter become active with the next call.
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“enabled“(P) AMR is used for every operator.
“disabled“ AMR is not used for any operator.
00000...999999 Enable AMR for the specified operator (in BCD or IRA format; see AT+COPS).
Audio Loop Setting
This parameter can be used to configure an audio loop for performing a simple verification of audio connections.
The intention of this audio loop is for testing only.
Full audio processing will be performed. Audio parameterization capabilities remain nearly unrestricted. Micro-
phone and loudspeaker ports can be selected with random access. The audio loop cannot be used in combina-
tion with the digital audio interface. Neither a SIM-card nor a GSM network is necessary to turn the audio loop on.
Turning the audio loop on activates audio mode 0 which cannot be selected during normal operation of the mod-
ule. Turning the audio loop off activates audio mode 1. The active audio mode can be verified via AT^SNFS.
Audio mode 0 contains linear filters and neither echo canceller nor noise suppression are activated. It is also
possible to select any other audio mode. These audio modes use the parameterization set as default during nor-
mal operation of the module.
Activation of the audio loop turns sidetone off, even if sidetone is on in the selected audio mode during normal
operation.
Audio path can be selected via AT command AT^SAIC. Audio mode can be selected via AT command
AT^SNFS.
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“0“(P) No audio loop active
“1“ Audio loop active
Write Command
Duration of active RING line for URC indications:
AT^SCFG="URC/Ringline/ActiveTime"[, <urat>]
Response(s)
^SCFG: "URC/Ringline/ActiveTime", <urat>
OK
ERROR
+CME ERROR
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<amr>(str)(+CSCS)
<al>(str)
MC55i AT Command Set
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Call Speech Version1
This parameter can be used to query or configure the speech version 1 indication in the bearer capabilities in
case of voice calls (see GSM 04.08). Speech version 2 (EFR) is always enabled; speech version 3 ( AMR) is
not affected by this command.
If you try to change this parameter as long as a circuit switched call is active, the command returns the new value
and "OK", but the changes will not take effect before next call setup.
Parameter is global for the ME, volatile and will not be reset by AT&F.
“0“(P) FR and HR codecs are enabled for speech calls - full rate codec is preferred.
“1“ FR and HR codecs are enabled for speech calls - half rate codec is preferred.
“2“ Half rate codec is disabled for speech calls.
GPRS ATS0 with Attach
This parameter can be used to control the behaviour of ATS0.
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“on“(P) When the ATS0=<n> (<n>>0) command is received, the MT will attempt to per-
form a GPRS attach.
“off“ When the ATS0=<n> (<n>>0) command is received, the MT will not attempt to
perform a GPRS attach.
Ring on incoming GPRS IP data packets
This parameter can be used to control the behaviour of the RING line for incoming IP packets in GPRS online
mode.
Parameter is local for the interface, volatile and will not be reset by AT&F.
“on“ If the ME is in power saving mode 7 or 8 or 9 (see AT+CFUN) and hardware
flow control is in use (AT\Q3) and the RTS line is inactive and there are incom-
ing IP packets for a GPRS context which is online, then the RING line will be
activated once, for a time which is configured by the parameter "URC/Ringline/
ActiveTime" (<urat>). The RING line to be used can be configured with the
parameter "URC/Ringline" (<uri>).
“off“(P) RING line is not activated for incoming IP packets.
Power saving mode 9 timeout
This parameter can be used to query or configure the wake up time for power saving mode 9 (see AT+CFUN with
parameter <fun>=9).
Parameter is global for the ME, volatile and will not be reset by AT&F.
5...20(P)...36000 The granularity of the timeout value is 100ms (i.e. a value of 10 equal 1 sec-
ond). The minimum timeout value that can be applied is 5, but accuracy is only
guaranteed for timeout values greater than 20.
<csv1>(str)(+CSCS)
<gs0aa>(str)(+CSCS)
<groid>(str)(+CSCS)
<psm9to>(str)(+CSCS)
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Call Handover Status
This parameter offers a workaround to prevent problems during call handover into the 1900 MHz (or 1800 MHz)
band, caused by non-conforming configurations of the 1900 MHz (or 1800 MHz) GSM network.
“0“(P) Disable workaround.
“1“ Enable workaround. This value should be selected when handover into a 1900
MHz (or 1800 MHz) GSM network fails. If required for permanent use the value
needs to be set each time the ME is restarted.
Network Selection Mode
This parameter allows network selection without considering the MCC.
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“0“(P) Network selection compliant with the 3GPP standards.
“1“ Network selection without considering the MCC.
Initial Retransmission Timeout (IRT)
1...3(&F)(D)...60 This parameter determines the time (in seconds) the TCP/IP stack will wait
before starting the first retransmission of packets during the initial connection
establishment phase.
The TCP protocol ensures the retransmission of packets several times at
increasing intervals until some upper limit is reached.
This mechanism prevents packet loss and serious congestion problems. In
addition, the parameters <tcpMr> and <tcpOt> can be set to further optimize
this mechanism for special conditions depending on the mobile network.
Parameter is global for the ME and non-volatile. Use of default value is recom-
mended. If changed the new value takes effect the next time you start an Inter-
net service with AT^SISO.
Maximum Number of Retransmissions (MR)
1...10(&F)(D)...30 This parameter determines the maximum number of times to retransmit TCP
packets.
The value set with <tcpMr> will be assumed as default for the <srv-
ParmTag> "tcpMR" when a new service profile is created with AT^SISS. In
each service profile, you can set another "tcpMR" value which has precedence
over the global value set with AT^SCFG. Existing service profiles are not
affected when you change the global value via AT^SCFG.
Parameter is global for the ME and non-volatile. Use of default value is recom-
mended.
Overall TCP Timer for outstanding connections (tcpOT)
1...6000(&F)(D) This parameter specifies the number of seconds to wait before closing a con-
nection if TCP/IP packets are not acknowledged.
Setting the maximum value is practically equivalent to deactivating the tcpOT
mechanism because the maximum time would never be reached by the TCP/
IP stack.
The value set with <tcpOt> will be assumed as default for the <srv-
ParmTag> "tcpOT" when a new service profile is created with AT^SISS. How-
<HandOverStatus>(str)(+CSCS)
<NetworkSelectionMode>(str)(+CSCS)
<tcpIrt>(str)(+CSCS)
<tcpMr>(str)(+CSCS)
<tcpOt>(str)(+CSCS)
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ever, in each service profile, you can set another "tcpOT" value which has
precedence over the global value set with AT^SCFG. Existing service profiles
are not affected when you change the global value via AT^SCFG.
Parameter is non-volatile. Use of default value is recommended.
URC mode or polling mode for Internet service commands
This parameter enables or disables the presentation of the following URCs related to Internet service com-
mands: "^SISR" URC, "^SISW" URC and "^SIS" URC for parameter <urcCause>=0 (Internet service events).
"^SIS" URCs with <urcCause>=1 or 2 used to indicate incoming Socket connections are always enabled.
Parameter is global for the ME and non-volatile.
“on“(&F)(D) Enable URCs related to Internet service commands.
Throughout the Chapter "Internet Service AT Commands" the mode is also
referred to as URC mode.
“off“ Disable URCs related to Internet service commands.
This requires the host application to employ polling techniques when using the
Internet service AT commands: The host application is responsible to retrieve
all status information needed to control an Internet session. The method is
referred to as polling mode.
CIEV Call Status Indication
This parameter can be used to control the behaviour of URC "+CIEV: call". See also AT+CIND, AT+CMER and
Section 7.1, Call Status Information.
Parameter is global for all interfaces and will not be reset by AT&F.
“restricted“(P) URC "+CIEV: call" will be issued only when a Call Status transition ends in
state "active" or "unknown" (see Section 7.1, Call Status Information) for a call
in the list of active calls.
“verbose“ URC "+CIEV: call" will be issued when any state transition (including transi-
tions beginning or ending in state "unknown") occurs in the list of active calls,
or when a traffic channel is established.
SLCC Call Status Indication
This parameter can be used to control the behaviour of URC "^SLCC". See also AT^SLCC and Section 7.1, Call
Status Information.
Parameter is global for all interfaces and will not be reset by AT&F.
“restricted“ URC "^SLCC" will be issued only when a Call Status transition ends in state
"active" or "unknown" (see Section 7.1, Call Status Information) for a call in the
list of active calls
“verbose“(P) URC "^SLCC" will be issued when any state transition (including transitions
beginning or ending in state "unknown") occurs in the list of active calls, or
when a traffic channel is established.
URC RING line
This parameter can be used to control the behaviour of the RING line to indicate URCs (both for idle interfaces
and, if configured by the parameter "URC/Datamode/Ringline", if link is reserved) and, if configured, the indicator
for incoming IP packets (see parameter "GPRS/RingOnIncomingData" (<groid>).
Parameter is local for the interface, volatile and will not be reset by AT&F.
“off“ URC is not indicated by RING.
<tcpWithUrc>(str)(+CSCS)
<succ>(str)(+CSCS)
<sucs>(str)(+CSCS)
<uri>(str)(+CSCS)
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“local“(P) URC will be indicated by an activated RING line of the interface on which the
URC appears
“asc0“ URC is indicated by an activated RING0 line.
URC Datamode RING line
This parameter specifies whether RING or BREAK is used for the signaling of URCs when the TA-TE link is
reserved (e.g. during circuit-switched data calls, fax connections, in GPRS data mode or during the execution
of an AT command).
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“off“(P) URC will be indicated by BREAK
“on“ URC is indicated by an active RING line for a time which is configured by the
parameter "URC/Ringline/ActiveTime" (<urat>). The RING line which will be
used, can be configured by the parameter "URC/Ringline" (<uri>).
URC RING line Active Time
This parameter can be used to control how long the RING line is activated to indicate URCs (both for idle inter-
faces and, if configured by the parameter "URC/Datamode/Ringline" (<udri>), if link is reserved) and, if con-
figured by the parameter "GPRS/RingOnIncomingData", to indicate incoming GPRS IP data packets
(<groid>).
Parameter is global for all interfaces, volatile and will not be reset by AT&F.
“0“ RING line will be activated for a time between 4.6 and 9.2 ms.
“1“ RING line will be activated for about 100ms.
“2“(P) RING line will be activated for about 1s.
Note
• Parameters "GPRS/ATS0/withAttach" (<gs0aa>) and "GPRS/RingOnIncomingData" (<groid>) are avail-
able only for modules supporting GPRS.
Examples
EXAMPLE 1
Usage of "Audio/AMR":
<udri>(str)(+CSCS)
<urat>(str)(+CSCS)
AT+CSCS="UCS2"
Switch to UCS2 character set.
OK
AT^SCFG?
Query all parameters.
...
^SCFG:"Audio/AMR","0065006E00610062006C00650064"
...
OK
AT+CSCS="GSM"
OK
AT^SCFG?
...
^SCFG:"Audio/AMR","enabled"
AMR will be used for any operator.
...
OK
AT^SCFG="Audio/AMR","disabled"
^SCFG:"Audio/AMR","disabled"
AMR is disabled for any operator.
OK
AT^SCFG="Audio/AMR","23405"
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EXAMPLE 2
Usage of "URC/Ringline" and "URC/Datamode/Ringline":
^SCFG:"Audio/AMR","23405"
AMR is disabled for any operator, but enabled for
operator "23405".
OK
AT^SCFG="Audio/AMR","23203"
^SCFG:"Audio/AMR","23405","23203"
AMR is disabled for any operator, but enabled for
operators "23405" and "23203".
OK
AT^SCFG="Audio/AMR"
Query parameter "Audio/AMR"
^SCFG:"Audio/AMR","23405","23203"
OK
AT+CSCS="GSM"
Switch to GSM character set.
OK
AT^SCFG?
Query all parameters.
...
^SCFG:"URC/Datamode/Ringline","off"
While the TA-TE link is reserved URCs will be indi-
cated by BREAK.
^SCFG:"URC/Ringline","local"
URCs on this interface will be indicated by Ring line
associated to the interface (e.g. RING0 for ASC0).
...
OK
AT^SCFG="URC/Datamode/Ringline","on"
^SCFG:"URC/Datamode/Ringline","on"
While the TA-TE link is reserved URCs will be indi-
cated by an activated "local" Ring line.
OK
AT^SCFG="URC/Ringline","asc0"
^SCFG:"URC/Ringline","asc0"
URCs on this interface will be indicated by an acti-
vated RING0 no matter whether or not the TA-TE link
is reserved.
OK
AT^SCFG="URC/Datamode/Ringline","off"
^SCFG:"URC/Datamode/Ringline","off"
URCs on this interface will be indicated by an acti-
vated RING0 if the TA-TE link is not reserved and by
BREAK if the TA-TE link is reserved.
OK
AT^SCFG="URC/Ringline"
Disable any Ring line indication for URCs on this
interface.
^SCFG:"URC/Ringline","off"
OK
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2.14 AT^SM20 Set M20 compatibility mode
M20 is an earlier, widely used SIEMENS GSM engine. The AT^SM20 command selects different modes of
responses returned upon execution of the commands ATD and sms commands like e.g. AT+CMGW. Please note
that the AT^SM20 command has no effect on any other features and is not intended to adjust other differences
between M20 and MC55i.
Syntax
Parameter Description
Call setup response mode
Applies only to voice calls.
0 Set compatibility to Siemens mobile phones.
ME will return "OK" immediately after attempting a call with the ATD command.
In case of failure, additional call release indications, such as "NO DIAL TONE,
"NO CARRIER", "BUSY" will follow.
1(&F) Default call setup mode, compatible to M20.
ME will return "OK" in case of a successful connection, otherwise one of the
call release indications "NO DIAL TONE, "NO CARRIER", "BUSY" are indi-
cated.
Response mode for sending and writing short messages
Applies to the sms commands like e.g. AT+CMGS and AT+CMGW command.
0 Set compatibility to Siemens mobile phones.
ME will return +CMS ERROR: <err> when writing or sending of short mes-
sages fails.
1(&F) Default mode for sending and writing short messages, compatible to M20.
ME will return "OK", no matter whether or not sms command was successfully
executed.
Test Command
AT^SM20=?
Response(s)
OK
Read Command
AT^SM20?
Response(s)
^SM20:<CallMode>, <CmgwMode>
OK
Write Command
AT^SM20=<CallMode>[, <CmgwMode>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<CallMode>(num)
<CmgwMode>(num)
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3. Status Control Commands
The AT Commands described in this chapter allow the external application to obtain various status information
from the MC55i.
3.1 AT+CMER Mobile Equipment Event Reporting
This command controls details of the "+CIEV" URC presentation related to AT^SIND and AT+CIND. If registered
via these commands the URCs are sent whenever a value of the related indicator changes.
In addition, AT+CMER controls "^SLCC" URCs related to AT^SLCC. For details refer to Call Status Infor-
mation, AT^SLCC and AT^SCFG, parameter <sucs>.
The read command returns the URC presentation mode <mode> and among others, the indicator event reporting
status <ind>.
The write command enables and disables the presentation of "+CIEV: <indDescr>, <indValue>1[, <ind-
Value>2]" URCs. <indDescr> refers to the name of a "+CIEV" indicator and <indValue> is the new value of
this indicator. After AT+CMER has been switched on, URCs for all registered indicators will be issued. See exam-
ples provided in Section 3.2, AT+CIND and Section 3.3, AT^SIND.
Syntax
Unsolicited Result Code
+CIEV: <indDescr>, <indValue>1[, <indValue>2]
A value of an indicator has changed.
Test Command
AT+CMER=?
Response(s)
+CMER: (list of supported<mode>s), (list of supported <keyp>s), (list of supported <disp>s), (list of
supported <ind>s), (list of supported <bfr>s)
OK
Read Command
AT+CMER?
Response(s)
+CMER: <mode>, <keyp>, <disp>, <ind>, <bfr>
OK
Write Command
AT+CMER=[<mode>[, <keyp>[, <disp>[, <ind>[, <bfr>]]]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
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Parameter Description
0(&F) Discard "+CIEV" and "^SLCC" URCs.
1 Discard "+CIEV" and "^SLCC" URCs when TA-TE link is reserved, e.g. in
online data mode. Otherwise they are forwarded directly to the TE.
2 Buffer "+CIEV" and "^SLCC" URCs in the TA while TA-TE link is reserved, e.g.
in online data mode, and flush them to the TE afterwards. Otherwise they are
forwarded directly to the TE.
3Forward "+CIEV" and "^SLCC" URCs directly to the TE. If MC55i is in online
data mode, URCs are signaled via sending BREAK and stored in a buffer.
Once it is back in command mode e.g. after +++ was entered, all URCs stored
in the buffer will be output.
0(&F) Keypad event reporting is not supported by MC55i.
0(&F) Display event reporting is not supported by MC55i.
0(&F) Disable indicator event reporting.
2 Enable indicator event reporting.
0(&F) TA buffer of URCs defined within this command is cleared when <mode> 1..3
is entered.
Name of indicator; for a list of all supported indicators please refer to AT+CIND and AT^SIND.
Value of indicator; for a list of all values for the supported indicators please refer to AT+CIND and AT^SIND.
Note
• If the ME operates on different instances (MUX channels 1, 2, 3 or ASC0/ASC1) avoid different settings for
routing and indicating SMS. For example, if messages shall be routed directly to one instance of the TE (set
with AT+CNMI, AT^SSDA), it is not possible to activate the presentation of URCs with AT+CMER or AT+CNMI
on another instance. Any attempt to activate settings that conflict with existing settings on another interface,
will result in CME ERROR, or accordingly CMS ERROR.
<mode>(num)
<keyp>(num)
<disp>(num)
<ind>(num)
<bfr>(num)
<indDescr>(str)
<indValue>(num)
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3.2 AT+CIND Indicator control
The AT+CIND command controls the presentation of Indicator Event Reports related to various functions such
as battery charge level, signal quality, service availability, sound generation, indication of unread short mes-
sages, full SMS storage, call in progress or roaming activities.
Use of AT+CIND has become outdated. Rather we recommend the more powerful AT^SIND command which is
easier to use and provides additional indicators. All indicators provided by AT+CIND can be handled with
AT^SIND as well.
AT+CIND supports two ways to get the values related to indicators:
• One approach is to query the current status of each indicator by using the read command AT+CIND?. It
returns the status no matter whether the indicator has been registered with the write command
AT+CIND=[<mode>[,<mode>[,...]]].
• The other way is an event-driven notification based on the "+CIEV" URCs. In this case, the ME will automat-
ically send a message to the application, whenever the value of an indicator changes. The application should
be designed to react adequately when receiving a URC.
The presentation of these URCs depends on two settings:
- The indicators must be registered with the write command AT+CIND=[<mode>[,<mode>[,...]]]. When the
ME is switched on all of them are in registered mode. Any indicator can be excluded if deregistered with
<mode>=0. To register or deregister an indicator the AT+CIND write command requires to type the value
<mode>=1 or 0 exactly at the position where the indicator is located in the list. This is not necessary with
AT^SIND which allows to specify indicators by name. See examples below.
- The presentation of the registered indicators must be enabled with AT+CMER.
Syntax
Parameter Description
Integer type value, which shall be in range of corresponding <indDescr>
Test Command
AT+CIND=?
Response(s)
+CIND: (<indDescr>, list of supported <indValue>s)[, (<indDescr>, list of supported <indValue>s)[,
...]]
OK
Read Command
AT+CIND?
Response(s)
+CIND: <indValue>[, <indValue>[, ...]]
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CIND=<mode>[, <mode>[, ...]]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<indValue>(num)
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String values and their <indValue> ranges.
More indications are available via AT^SIND. Therefore use of AT^SIND for control of all indications is recom-
mended.
The following indications are accessible via AT+CIND:
“battchg“ Battery charge level 0..4 or 5 if no measuring is performed, e.g because no bat-
tery is connected. Also refer to AT^SBC.
“signal“ Signal quality (0..7) or (99) if not measurable
The indicated value is the bit error rate of the signal received. Bit errors are esti-
mated values. See also AT+CSQ.
“service“ Service availability (0-1)
0: Not registered to any network
1: Registered to home network or, if "roam"=1 then registered to another net-
work
“sounder“ Sounder activity (0-1)
Reports every event that causes the ME to generate a tone.
Value 1 means for example:
Incoming call - ME is ringing. Note that the URC "+CIEV: sounder" will be out-
put only if ringing tones are activated with AT^SRTC.
Waiting call - ME generates waiting call tone (if call waiting is enabled).
Outgoing call - ME generates Call Progress tone.
Outgoing call - ME generates BUSY tone.
The value changes to 0 when the tone stops.
“message“ Unread short message at memory location <mem1> (0-1); refer to AT+CPMS
“call“ Call in progress (0-1). Indicator value is "1" if at least one call is in state "active"
or "held".
Depending on the parameter <succ> selected with AT^SCFG the indicator
"call" will be issued
• when a state transition ends in state "active" or state "unknown", if
<succ>="restricted",
• when any state transition (including transitions beginning or ending in state
"unknown") occurs in the list of active calls or when a traffic channel is
established, if <succ>="verbose".
Also refer to Section 7.1, Call Status Information.
“roam“ Roaming indicator (0-1)
0: Registered to home network or not registered
1: Registered to other network
“smsfull“ A short message memory storage in the MT has become full (1) or memory
locations are available (0), i.e. range is (0-1)
“rssi“ Received signal (field) strength (0..5) or (99) if not measurable
0: signal strength ≤ -112 dBm
1-4: signal strength in 15 dB steps
5: signal strength ≥ -51 dBm
99: not known or not detectable
Received signal (field) strength can also be obtained with AT+CSQ. However,
the signal strength is scaled to value range 0..31 by this command.
0 Indicator is deregistered. The indicator will not be presented as "+CIEV" URC,
but can be queried with AT+CIND?.
[1](&F)(P) Indicator is registered, indicator event report allowed.
<indDescr>(str)
<mode>(num)
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Notes
• Due to its restrictive value range, indicator "call" does not clearly reflect specific call states (such as alerting,
active, held etc.), but rather serves to trigger the application to retrieve the new call status from the list of cur-
rent calls with the AT commands AT^SLCC, AT+CLCC or AT^SCNI.
• If AT^SCFG setting <succ>="verbose", indicator "call" will be issued also when a traffic channel is estab-
lished, or when a call enters states "terminating" or "dropped" (see Call Status Information).
In these cases, the relevant information about the cause of the display is available only from AT command
AT^SLCC.
Examples
EXAMPLE 1
EXAMPLE 2
Deactivation of indicator "sounder" via AT+CIND
EXAMPLE 3
Deactivation of indicator "sounder" via AT^SIND
^SYSSTART
AT+CPIN=9999
OK
AT+CIND?
+CIND: 5,99,1,0,0,0,0,0
The battery is either full or no battery is connected to the ME. The bit
error rate of the signal quality is not available (since there is no call in
progress). The ME is registered to its home network.
OK
AT+CMER=2,0,0,2
Now activate the Indicator Event Report with AT+CMER.
OK
+CIEV: battchg,5
+CIEV: signal,99
+CIEV: service,1
+CIEV: sounder,0
+CIEV: message,0
+CIEV: call,0
+CIEV: roam,0
+CIEV: smsfull,0
+CIEV: rssi,5
Full receive signal strength.
ATD0123456;
Make a call.
OK
+CIEV: sounder,1
A set of "+CIEV" URCs is received.
+CIEV: call,1
+CIEV: sounder,0
+CIEV: call,0
Called party hangs up.
NO CARRIER
AT+CIND=,,,0,,0
Deregister the indicators "sounder" and "call".
OK
ATD0123456;
Dial the same call.
OK
This time, no URCs are displayed.
NO CARRIER
Called party hangs up.
AT+CIND?
Query the current status of indicators.
+CIND: 5,99,1,0,1,0,0,0,4
OK
AT+CIND=,,,0
To deactivate indicator "sounder" (= fourth item in list of indicators).
OK
AT^SIND="sounder",0
To deactivate indicator "sounder".
^SIND: sounder,0,0
OK
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3.3 AT^SIND Extended Indicator Control
Designed for extended event indicator control AT^SIND
• offers greater flexibility than the standard command AT+CIND,
• offers several extra indicators,
• can show the current status of all indicators supported by AT+CIND and AT^SIND,
• can be used to register or deregister the indicators of both commands,
• displays all indicator event reports via "+CIEV" URCs.
Presentation mode of the generated URCs is controlled via AT+CMER.
The AT^SIND read command provides a list of all indicators supported by AT+CIND and AT^SIND. Each indica-
tor is represented with its registration mode and current value.
The AT^SIND write command can be used to select a single indicator in order to modify its registration and to
view the current value.
Syntax
Test Command
AT^SIND=?
Response(s)
^SIND: (<indDescr>, list of supported <indValue>s)[, (<indDescr>, list of supported <indValue>s)[,
...]], (list of supported <mode>s)
OK
Read Command
AT^SIND?
Response(s)
^SIND: <indDescr>, <mode>, <indValue>
[^SIND: <indDescr>, <mode>, <indValue>]
...
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SIND=<indDescr>, <mode>
Response(s)
^SIND: <indDescr>, <mode>, <indValue>
In case of: <indDescr>="eons" and <mode>=2
^SIND: "eons", <mode>, <indValue>, <eonsOperator>, <servProvider>
In case of: <indDescr>="nitz" and <mode>=2
^SIND: "nitz", <mode>, <nitzUT>, <nitzTZ>, <nitzDST>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
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Unsolicited Result Codes
URC 1
Format of the standard indicator:
+CIEV: <indDescr>, <indValue>
Value related to an indicator has changed.
URC 2
Format of the Voice Message indicator, if the number of waiting messages is delivered by the network:
+CIEV: <indDescr>, <indValue>, <vmCounter>
If the number of waiting messages is not delivered the standard indicator applies.
URC 3
Format of the "eons" indicator:
+CIEV: <indDescr>, <indValue>, <eonsOperator>, <servProvider>
One URC is issued for each new LAI (Location Area Information) broadcast by the network.
URC 4
Format of the "nitz" indicator:
+CIEV: <indDescr>, <nitzUT>, <nitzTZ>, <nitzDST>
Parameter Description
String values and their <indValue> ranges.
All indicators supported by AT+CIND are accessible with this command, too. A detailed description of these indi-
cators can be found there.
The following indicators are accessible via AT^SIND only:
“audio“ Activity of the built-in audio unit.
“vmwait1“ Voice Message Waiting Indication for line 1
"vmwait1" and "vmwait2" indicate the receipt of a special short message with
a Voice Message Waiting Indicator. The service must be provisioned by the
operator.
The numbers 1 or 2 in "vmwait1" and "vmwait2" are related to the two lines of
the Alternate Line Service (ALS), also defined in CPHS Phase 2 standard. For
further details refer to the AT^SALS command.
The presentation mode of the indicator varies with the operator: If more than
one message are waiting, some operators only indicate the first one, others
deliver the indicator each time a new voice message is put into the mailbox.
After the subscriber has retrieved all voice messages the service center auto-
matically sends another message indication which provides the value 0.
Some operators may also send the number of waiting voice messages along
with the indication. In this case, the number will be displayed by the MC55i as
part of the URC. For example, "+CIEV: vmwait1,1,5" notifies that five new voice
messages are waiting. However, it should be noted that neither the read com-
mand AT^SIND? nor the write command AT^SIND=<mode>,2 display the
number of waiting messages.
<indDescr>(str)
0Audio unit not active.
1Audio unit is active, for example:
MO voice call: Indicator is output with value 1 when dialing starts.
MT voice call: Indicator is output with value 1 when call is ringing.
0The value 0 notifies that no new voice message is available, and is pro-
vided by the service center to clear the voice message indication after
the subscriber has retrieved all voice messages.
1The value 1 notifies the subscriber that the mailbox contains one or
several messages.
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The "vmwait" indicators do not apply if a network provider signals new voice
mail(s) via standard SMS. In this case the indicator "message" will be displayed
(see AT+CIND).
“vmwait2“ Voice Message Waiting Indication for line 2
“ciphcall“ Ciphering Status Change Indication
As stated in GSM specifications 02.07 and 02.09 the ciphering indicator feature
allows the MC55i to detect that ciphering is not switched on and to indicate this
to the user.
The ciphering indicator feature may be disabled by the home network operator
setting data in the "administrative data" field (EFAD) in the SIM, as defined in
GSM 11.11.
If this feature is not disabled by the SIM, then whenever a connection is in
place, which is, or becomes unenciphered, an indication shall be given to the
user. This enables the user's decision how to proceed.
Read command returns valid ciphering status only if a call is in progress or
active.
If EFAD setting disables the ciphering indicator feature read command always
indicates a ciphered link and no URC presentaion will take place.
The following restrictions apply if the same serial channel is used for AT^SIND
"ciphcall" indication and for the action triggering this URC. In general, the rec-
ommended solution is to use a dedicated channel for all status signalling via
URCs.
• If an unciphered mobile originated SMS is performed, AT^SIND "ciphcall"
URCs on the same serial channel will be issued after the related "OK" and
indicate the ciphering state at this time. Because the SMS is already sent at
this time, two URCs will be issued on this channel, but both are indicating
that ciphering is enabled.
• If an unciphered mobile originated data call is performed, AT^SIND "ciph-
call" URCs on the same serial channel will be issued after the interface is
not longer blocked by the call (call is released or temporarily stopped) and
indicate the ciphering state at this time.
“eons“ Enhanced Operator Name String (EONS) Indication
The Enhanced Operator Name String indicator feature allows the MC55i to out-
put various operator names for different PLMN identities via URC. It also allows
the output of a different operator name based on a subset of the registered net-
work by using a range of Location Area Codes (LACs) or a single LAC.
The presentation of the "eons" indicator is determined by network activity. For
example, the indicator appears every time a location update occurs or a NITZ
information is sent, no matter whether or not the status of the EONS informa-
tion has changed. This means that the same EONS information may be
reported several times.
The EONS tables are stored in the SIM card and will be read at power-up.
Following are the SIM Elementary Files that are affected by the introduction of
EONS feature in the SIM card:
EFSST (SIM Service Table) - describes which features are active.
EFOPL (Operator PLMN List) - contains the PLMN identification and location ID
together with the index of the corresponding PNN record
EFPNN (PLMN Network Name) - contains the full and short form version of the
network name for the registered PLMN
If the Operator Name Source is CPHS Operator Name String long and short
form, refer to <indValue>, the following two SIM Elementary Files will be
used:
0See description of "vmwait1".
1See description of "vmwait1".
0Current call or SMS is not ciphered.
1Current call or SMS is ciphered.
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EFONString (Operator Name String) - contains the name of the PLMN operator
who issued the SIM.
EFOPShort (Operator Name Short form) - contains a short form of the name of
the PLMN operator who issued the SIM.
“nitz“ Network Identity and Time Zone indication
This indicator shows the time relevant information elements of an MM Informa-
tion (MMI) or GMM Information (GMMI) message received from the network
(see GSM 24.008, ch. 9.2.15a and 9.4.19). The network usually sends a NITZ
indicator when the mobile attaches to the network, when it enters a location
area with different time zone or when a daylight change occurs.
A NITZ indicator may consist of the following parameters: Universal Time (UT),
local Time Zone (TZ), Daylight Saving Time (DST). All information elements of
MMI/GMMI are optional and therefore, the presentation of the parameters
<nitzUT>, <nitzTZ>, <nitzDST> varies with the network. For example, the
network may send all three parameters UT, TZ, DST, or only UT and TZ or only
TZ.
UT is indicated in usual date/time format and represents the current world time
(GMT) at the moment when sent.
TZ is given as a positive (east) or negative (west) offset from UT in units of 15
minutes.
DST shows the number of hours added to the local TZ because of daylight sav-
ing time (summertime) adjustment. Usually DST is 1 hour but it can be also 2
hours in certain locations.
Example for time and time zone with DST:
+CIEV: nitz,"04/07/23,13:39:20",-28,1
In this example TZ is -28, showing a time offset of -7 hours (west) to Universal
Time/GMT (which never changes for DST). DST is 1 which indicates that one
hour was added to TZ because of Daylight Saving Time. If a network does not
send the DST parameter the TZ value would be -32 (8 hours west) as would
be done in winter:
+CIEV: nitz,"04/11/23,13:39:20",-32
Please be aware that despite the last NITZ value can be looked up again via
"AT^SIND=nitz,2" the returned values may be out of date. Especially the UT
value is obsolete because there is no internal NITZ clock and therefore no con-
tinuation of UT.
NITZ values are lost when the module detaches from network. Also when a
manual network selection fails and the module automatically falls back to the
previous network the NITZ values cannot be recalled. Nevertheless an indi-
cated time zone is valid until a new MMI/GMMI will trigger another NITZ indi-
cation.
Integer type value in the range stated above for the corresponding <indDescr>.
Notes specific to the EONS feature:
If the indicator is "eons", the <indValue> is a type associated to the operator name according to GSM 22.101
[23]. This type depends on the source of the operator name.
Priority of types associated to the operator names is defined as follows (the type listed first has the highest pri-
ority). If a type cannot be indicated the next one will be used.
<indValue>(num)
0Not registered.
1EF-OPL and EF-PNN (alphanumeric format, can contain up to 24 characters.)
2Operator Name String in long and short format according to Common PCN
Handset Specification (CPHS) [24] (alphanumeric format, can contain up to 16
characters).
3Name information received by the NITZ service long and short form (alphanu-
meric format, can contain up to 16 characters). The short form will be displayed
only if EFOPShort from CPHS is available.
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If the type is 2, 4 or 5, AT+COPS with the appropriate <mode> displays the same operator name.
0 Indicator is deregistered, i.e. no such indicator event report (URC) will be
issued. <mode>=0 is power-up and factory default of indicators defined by
AT^SIND only.
1 Indicator is registered.
• Indicator event reports are controlled via AT+CMER.
• All indicators can be registered or deregistered via AT^SIND, but different
default settings apply: Power-up and factory default of the indicators sup-
ported by AT+CIND is <mode>=1, while, as stated above, indicators defined
by AT^SIND only are set to <mode>=0.
2 Query the registration status and the current value of a single indicator type.
If delivered by the network: Number of new voice messages sent as part of the Voice Message Waiting Indicator.
Refer to <indDescr>.
Operator in format which depends on the type associated to the operator name. Refer to <indValue>.
Service Provider Name according to the status settings (SIM Service No. 17) in the SIM Service Table (SST) of
the SIM.
Universal Time delivered as part of the "nitz" Indicator. Refer to <indDescr>.
Time Zone delivered as part of the "nitz" Indicator. Refer to <indDescr>.
Adjustment for Daylight Saving Time as part of the "nitz" Indicator. Refer to <indDescr>.
Example
Activation and use of indicator "audio":
4Any operator name stored internal to the ME (alphanumeric format, can con-
tain up to 16 characters).
5Broadcast MCC-MNC (numeric format which consists of a 3-digit country code
plus a 2- or 3-digit network code).
<mode>(num)
<vmCounter>
<eonsOperator>
<servProvider>(str)
<nitzUT>
<nitzTZ>
<nitzDST>
AT^SIND="audio",1
You register the indicator "audio".
^SIND: audio,1,0
OK
AT+CMER=2,,,2
You activate the Indicator Event Report with AT+CMER.
OK
A set of all registered URCs is presented. (Please note that the example
includes the indicators registered due to the power-up default settings
of AT+CIND.)
+CIEV: battchg,5
+CIEV: signal,99
+CIEV: service,1
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+CIEV: sounder,0
+CIEV: message,1
+CIEV: call,0
+CIEV: roam,0
+CIEV: smsfull,0
+CIEV: rssi,4
+CIEV: audio,0
ATD030123456
You make a call.
OK
+CIEV: audio,1
+CIEV: sounder,1
+CIEV: call,1
+CIEV: signal,0
+CIEV: sounder,0
ATH
You hang up.
OK
+CIEV: call,0
+CIEV: rssi,3
+CIEV: audio,0
+CIEV: signal,99
+CIEV: rssi,4
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3.4 AT+CEER Extended Error Report
AT+CEER returns an extended error report regarding the reason of the last
• call release
• failure to set up a call (both mobile originated or terminated)
• failure to modify a call by using Supplementary Services
• failed attempt to activate, register, query, deactivate or deregister a Supplementary Service
• unsuccessful GPRS attach or unsuccessful PDP context activation
• GPRS detach or PDP context deactivation
The release cause report is presented in numeric format. Default output in case of a none-error-situation is
+CEER: 0,0,0. A description associated with each number can be found in the tables given in the following sub-
clauses and the relevant GSM specifications.
The first parameter <locationID> serves to locate the other two parameters. Depending on the failure or
release cause either <reason> or <ssRelease> are applicable, i.e. if <reason> ≠ 0, then <ssRelease> = 0.
Vice versa, if <reason> = 0, then <ssRelease> may be ≠ 0.
In addition to AT+CEER, the command ATS18 can be used to check especially the status of fax and data calls.
When losing network coverage the MC55i will disconnect the call. In this case, no network release cause is avail-
able, and AT+CEER returns only the default values +CEER: 0,0,0.
Syntax
Parameter Description
Location ID as number code. Location IDs are listed in Section 3.4.1, Cause Location ID for the extended error
report. Each ID is related with another table that contains a list of <reason>s or <ssRelease>s.
Reason for last call release as number code. The number codes are listed in several tables, sorted by different
categories in the following subclauses. The tables can be found proceeding from the Location ID given in Sec-
tion 3.4.1, Cause Location ID for the extended error report.
Test Command
AT+CEER=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT+CEER
Response(s)
+CEER: <locationID>, <reason>, <ssRelease>
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<locationID>(num)
<reason>(num)
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Release cause for last Supplementary Service call (listed in Section 3.4.10, GSM Release cause for Supple-
mentary Service Call) or last call related use of a Supplementary Service (listed in Section 3.4.11, SIEMENS
release cause for Call-related Supplementary Services (CRSS)).
Examples
EXAMPLE 1
EXAMPLE 2
The user attempts to activate call barring, but uses a wrong password.
3.4.1 Cause Location ID for the extended error report
<ssRelease>(num)
ATD"01751223344";
A mobile originated call is rejected by the remote party.
NO CARRIER
Call setup is terminated with NO CARRIER.
AT+CEER
To check the cause, the caller enters AT+CEER.
+CEER: 8,21,0
The Location ID 8 in Section 3.4.1 points to Section 3.4.7, where 21 =
"Call rejected". 0 = "No error" refers to parameter <ssRelease> that is
not applicable.
OK
AT+clck=oi,1,"0000",3
+CME ERROR: incorrect password
AT+CEER
+CEER: 35,0,38
The Location ID 35 in Section 3.4.1 points to Section 3.4.10, where 38
= "NegativePWCheck" may mean that a wrong password was tried for
the first time. 0 = "No error" refers to parameter <reason> that is not
applicable.
OK
ID Description
0 No error (default)
1 SIEMENS L2 cause
2 GSM cause for L3 Radio Resource Sublayer (GSM 04.08 annex F)
3 SIEMENS cause for L3 Radio Resource Sublayer
4 GSM cause for L3 Mobility Management (GSM 04.08 annex G)
5 SIEMENS cause for L3 Mobility Management
6 GSM cause for L3 Mobility Management via MMR-SAP (GSM 04.08 annex G)
7 SIEMENS cause for L3 Mobility Management via MMR-SAP
8 GSM cause for L3 Call Control (GSM 04.08 10.5.4.11 and annex H)
9 SIEMENS cause for L3 Call Control
11 SIEMENS cause for L3 Advice of Charge Entity
12 GSM cause for L3 SMS CP Entity
13 SIEMENS cause for L3 SMS CP Entity
14 GSM cause for L3 SMS RL Entity
15 SIEMENS cause for L3 SMS RL Entity
16 GSM cause for L3 SMS TL Entity
17 SIEMENS cause for L3 SMS TL Entity
18 SIEMENS cause for DSM Entity
21 GSM cause for L3 Call-related Supplementary Services
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3.4.2 SIEMENS L2 cause
3.4.3 GSM release cause for L3 Radio Resource (RR)
22 SIEMENS cause for L3 Call-related Supplementary Services
32 SIEMENS cause for Supplementary Services Entity
33 SIEMENS cause for Supplementary Services Manager
34 Network cause for Supplementary Services (GSM 04.08 10.5.4.11 and annex H)
35 Supplementary Services network error (GSM 04.80 3.6.6)
48 GSM cause for GPRS Mobility Management (GSM 04.08 annex G.6)
49 SIEMENS cause for GPRS Mobility Management
50 GSM cause for Session Management (GSM 04.08 annex I)
51 SIEMENS cause for Session Management
127 SIEMENS cause for protocol module or other local cause
128 Supplementary Services general problem (GSM 04.80 3.6.7)
129 Supplementary Services invoke problem (GSM 04.80 3.6.7)
130 Supplementary Services result problem (GSM 04.80 3.6.7)
131 Supplementary Services error problem (GSM 04.80 3.6.7)
241 SIEMENS cause for GPRS API
242 SIEMENS cause for Link Management
243 SIEMENS cause for PPP/IP-Stack
Number Description
249 No network response received, e.g. due to low signal quality
Number Description
0 Normal event
1 Abnormal release, unspecified
2 Abnormal release, channel unacceptable
3 Abnormal release, timer expired
4 Abnormal release, no activity on the radio path
5 Pre-emptive release
8 Handover impossible, timing advance out of range
9 Channel mode unacceptable
10 Frequency not implemented
65 Call already cleared
95 Semantically incorrect message
96 Invalid mandatory information
97 Message type non-existent or not implemented
98 Message type not compatible with protocol state
ID Description
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3.4.4 SIEMENS release cause for L3 Radio Resource (RR)
3.4.5 GSM release cause for Mobility Management (MM) or Session
Management (SM)
100 Conditional information element error
101 No cell allocation available
111 Protocol error unspecified
Number Description
1 Racchs not answered
2 Racchs rejected
3 Access class of the SIM is barred by the network provider
4 SABM failure
5 Radio link counter expiry or PerformAbnormalRelease
6 Confirm ABORT of the MM
7 Respond to DEACT REQ
8 Loss of coverage
9 Reestablishment not possible
10 T3122_STILL_RUNNING
11 CELL_SELECTION_IN_PROGRESS
12 RESPONDING_TO_PAGING
13 LOCATION_AREA_CODE_HAS_CHANGED
14 CIRCUIT_SWITCHED_NOT_AVAILABLE
Number Description
Causes related to MS identification
2 IMSI unknown in HLR
3 Illegal MS
4 IMSI unknown in VLR
5 IMEI not accepted
6 Illegal ME
Cause related to subscription options
11 PLMN not allowed
12 Location Area not allowed
13 Roaming not allowed in this location area
Causes related to PLMN specific network failures and congestion
17 Network failure
22 Congestion
Causes related to nature of request
Number Description
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3.4.6 SIEMENS release cause for L3 Mobility Management (MM)
32 Service option not supported
33 Requested service option not subscribed
34 Service option temporarily out of order
36 Regular PDP context deactivation
38 Call cannot be identified
Causes related to invalid messages
95 Semantically incorrect message
96 Invalid mandatory information
97 Message type non-existent or not implemented
98 Message not compatible with protocol state
99 Information element non-existent or not implemented
100 Conditional information element error
101 Messages not compatible with protocol state
111 Protocol error, unspecified
Causes related to GPRS
7 GPRS services not allowed
8 GPRS services not allowed in combination with non-GPRS services
9 MS identity cannot be identified by the network
10 Implicitly detached
14 GPRS services not allowed in current PLMN
16 MSC temporarily unreachable
Number Description
1 No SIM available
8 No MM connection
9 Authentification failure
11 MM performs detach
17 Registration failed and will be re-attempted in a short term
18 CM connection establishment failed
19 Registration failed and will be re-attempted in a long term
20 RR connection is released
21 MS tries to register
22 SPLMN is not available
23 An MTC is in progress
24 A PLMN scan is in progress
25 The MM is detached, the MS is in MS class C GPRS only
Number Description
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3.4.7 GSM release cause for L3 Call Control (CC)
Number Description
0 No error
Normal class
1 Unassigned (unallocated) number
2 Service not available
3 No route to destination
6 Channel unacceptable
8 Operator determined barring
9 FDN Mismatch
16 Normal call clearing
17 User busy
18 No user responding
19 User alerting, no answer
21 Call rejected
22 Number changed
25 Pre-emption
26 Non-selected user clearing
27 Destination out of order
28 Invalid number format (incomplete number)
29 Facility rejected
30 Response to STATUS ENQUIRY
31 Normal, unspecified
Resource unavailable class
34 No circuit/channel available
38 Network out of order
41 Temporary failure
42 Switching equipment congestion
43 Access information discarded
44 Requested circuit/channel not available
47 Resource unavailable, unspecified
Service or option not available class
49 Quality of service unavailable
50 Requested facility not subscribed
55 Incoming calls barred within the CUG
57 Bearer capability not authorized
58 Bearer capability not presently available
63 Service or option not available, unspecified
Service or option not implemented
65 Bearer service not implemented
68 ACM equal or greater than ACMmax
69 Requested facility not implemented
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3.4.8 SIEMENS release cause for L3 Call Control (CC)
70 Only restricted digital information bearer capability is available
79 service or option not implemented, unspecified
Invalid message (e.g. parameter out of range) class
81 Invalid transaction identifier value
87 User not member of CUG
88 Incompatible destination
91 Invalid transit network selection
95 Semantically incorrect message
Protocol error (e.g. unknown message) class
96 Invalid mandatory information
97 Message type non-existant or not implemented
98 Message type not comaptible with protocol state
99 Information element non-existent or not implemented
100 Conditional information element error
101 Message not compatible with protocol
102 Recovery on timer expiry
111 Protocol error, unspecified
Interworking class
127 Interworking, unspecified
Number Description
1 Call dropped
2 Service not available
3 Hold procedure not available
4 Temporary no service, previous procedure not yet finished
5 No speech service available
6 Call reestablishment procedure active
7 Mobile received a release (complete) message during a modify procedure (modify reject)
8 Call clearing, because loss of radio connection, if no reestablishment is allowed (call not
active)
10 Number not included in FDN list
11 Zero length called Party number
12 No more CC transactions available
13 Outgoing calls barred
14 Number is blacklisted in auto-call retry list
15 Auto-call number is not in list and list is full
16 Auto-call redial before minimum time elapsed
17 Requesting entity is not in control of CC
Number Description
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3.4.9 SIEMENS release cause for L3 Advice of Charge (AOC)
3.4.10 GSM Release cause for Supplementary Service Call
Notifications
300 Called party barred incoming call
Number Description
1 SIM data not available
2 SIM does not support AOC
3 SIM data access error
4 ACM limit almost reached ACM range overflow
5 ACM range overflow
Number Description
0 No error (default)
1 UnknownSubscriber
9 IllegalSubscriber
10 BearerServiceNotProvisioned
11 TeleserviceNotProvisioned
12 IllegalEquipment
13 CallBarred
15 CUGReject
16 IllegalSSOperation
17 SSErrorStatus
18 SSNotAvailable
19 SSSubscriptionViolation
20 SSIncompatibility
21 FacilityNotSupported
27 AbsentSubscriber
29 ShortTermDenial
30 LongTermDenial
34 SystemFailure
35 DataMissing
36 UnexpectedDataValue
37 PWRegistrationFailure
38 NegativePWCheck
43 NumberOfPWAttemptsViolation
71 UnknownAlphabet
72 USSDBusy
Number Description
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3.4.11 SIEMENS release cause for Call-related Supplementary Ser-
vices (CRSS)
126 MaxNumsOfMPTYCallsExceeded
127 ResourcesNotAvailable
General Problem Codes
300 Unrecognized Component
301 Mistyped Component
302 Badly Structured Component
Invoke Problem Codes
303 Duplicate Invoke ID
304 Unrecognized Operation
305 Mistyped Parameter
306 Resource Limitation
307 Initiating Release
308 Unrecognized Linked ID
309 Linked Response Unexpected
310 Unexpected Linked Operation
Return Result Problem Codes
311 Unrecognize Invoke ID
312 Return Result Unexpected
313 Mistyped Parameter
Return Error Problem Codes
314 Unrecognized Invoke ID
315 Return Error Unexpected
316 Unrecognized Error
317 Unexpected Error
318 Mistyped Parameter
Number Description
0 ECT procedure failed (timer expired)
1 Call has been cleared without receiving an answer to ECT request
2 Initial conditions not fulfilled (one active, one held call)
3 Received "return error"
4 Call has been cleared without receiving an answer to CCBS request
5 Initial conditions for CCBS not fulfilled (Idle CRSS)
Causes related to nature of request
25 LLC or SNDCP failure
26 Insufficient resources
27 Unknown or missing access point name
28 Unknown PDP address or PDP type
Number Description
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3.4.12 SIEMENS release cause for Session Management (SM)
29 User authentification failed
30 Activation rejected by GGSN
31 Activation rejected, unspecified
32 Service option not supported
33 Requested service option not subscribed
34 Service option temporarily out of order
35 NSAPI already used
36 Regular PDP context deactivation
37 QoS not accepted
38 Network failure
39 Reactivation requested
40 Feature not supported
Causes related to invalid messages
81 Invalid transaction identifier value
95 Semantically incorrect message
96 Invalid mandatory information
97 Message type non-existant or not implemented
98 Message type not comaptible with protocol state
99 Information element non-existent or not implemented
100 Conditional information element error
101 Message not compatible with protocol
111 Protocol error, unspecified
Number Description
3 The MS has not got any answer to the ACTIVATE PDP CONTEXT request message sent five
times to the network
4 A MT PDP context which is active or in the activation process is deactivated because another
MT PDP context with the same TI is requested by the network to be activated
5 A MT PDP context which is active or in the activation process is deactivated because another
MT PDP context with the same TI is requested by the network to be activated. The activation
request is rejected by the SM sending the cause 'insufficient resources' to the network
because the SM was not able to perform the necessary comparisons for a static PDP address
collision detection.
6 A MT PDP context which is active or in the activation process is deactivated because another
MT PDP context with the same TI is requested by the network to be activated. As a static PDP
address collision with an MO activating PDP context has been detected by the SM the SM dis-
cards the activation request
7 A MT PDP context request has been indicated but could not be processed in time. The acti-
vation request is rejected by the SM sending the cause 'insufficient resources' to the network.
Number Description
MC55i AT Command Set
3.4 AT+CEER s
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3.4.13 GSM cause for L3 Protocol module or other local cause
3.4.14 SIEMENS release cause for GPRS API
3.4.15 SIEMENS release cause for PPP/IP-Stack
Number Description
2 No detailed cause
Number Description
0 Regular deactivation of the call
1 Action temporarily not allowed
2 Wrong connection type
3 Specified data service profile invalid
4 PDP type or address is unknown
5 FDN Check was not successful; GPRS Attach and PDP Context Activation blocked
9 GPRS service not available
255 Undefined
Number Description
0 Regular call deactivation
1 LCP stopped
255 Undefined
MC55i AT Command Set
3.5 ATS18 s
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3.5 ATS18 Extended call release report
ATS18 controls the presentation of extended call release reports for circuit switched fax and data calls. Extended
call release reports related to voice calls are controlled via AT+CEER.
The call release report is presented in numeric format and shows as follows:
If enabled the message will be reported every time a fax or data call is released or fails to be established.
Syntax
Parameter Description
An odd number enables the presentation of the extended call release report. Any even number disables this
feature.
0(&F)...255
Location ID as number code, see also <locationID> of AT+CEER.
Location IDs are listed in Section 3.4.1, Cause Location ID for the extended error report. Each ID is related to
another table that contains a list of <reason>s.
Reason for last call release as number code (see also <reason> of AT+CEER).
<reason> numbers and the associated descriptions are listed in several tables, sorted by different categories
at AT+CEER. The tables can be found proceeding from the Location IDs listed in Section 3.4.1, Cause Location
ID for the extended error report.
+CAUSE:
<locationID>
:
<reason>
Read Command
ATS18?
Response(s)
<n>
OK
Write Command
ATS18=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<n>(num)(&W)(&V)
<locationID>(num)
<reason>(num)
MC55i AT Command Set
3.5 ATS18 s
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Examples
EXAMPLE 1
EXAMPLE 2
ATS18=1
Enables the presentation of extended call release reports.
OK
ATD03012345678
Now, a mobile originated data call fails.
+CAUSE: 8:17
An extended error report is output, followed by the result code BUSY.
BUSY
The Location ID 8 stated in Section 3.4.1 points to Section 3.4.7, with 17
= "User busy".
ATS18=1
Enables the presentation of extended call release reports.
OK
ATD03012345678
Now, a mobile originated data call is set up.
CONNECT 9600/RLP
Hello,....
+++
Call ends after remote party hung up.
+CAUSE: 8:16
Normal call release is reported, followed by the result code NO CAR-
RIER.
NO CARRIER
The Location ID 8 stated in Section 3.4.1 points to Section 3.4.7, with 16
= "Normal call clearing".
MC55i AT Command Set
3.6 AT+CPAS s
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3.6 AT+CPAS Mobile equipment activity status
The AT+CPAS execute command indicates the activity status of the ME.
Syntax
Parameter Description
0 Ready
3 Incoming call (ringing)
4 Call in progress or call hold
Test Command
AT+CPAS=?
Response(s)
+CPAS: (list of supported<pas>s)
OK
Exec Command
AT+CPAS
Response(s)
+CPAS: <pas>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<pas>(num)
MC55i AT Command Set
3.7 AT+WS46 s
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3.7 AT+WS46 Select wireless network
Syntax
Parameter Description
12 GSM digital cellular
Test Command
AT+WS46=?
Response(s)
+WS46: (list of supported<n>s)
OK
Read Command
AT+WS46?
Response(s)
<n>
OK
Write Command
AT+WS46=[<n>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<n>(num)
MC55i AT Command Set
4. Serial Interface Control Commands s
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4. Serial Interface Control Commands
The AT Commands described in this chapter allow the external application to determine various settings related
to the MC55i's serial interface.
4.1 AT\Q Flow control
Syntax
Parameter Description
[0](&F) Disable flow control
1 XON/XOFF software flow control
2 Only CTS by DCE (TA)
3 RTS/CTS hardware flow control
Recommended for the following procedures: incoming or outgoing data calls,
fax calls, MUX mode.
Often, the initialization routine of Fax programs includes enabling RTS/CTS
handshake, eliminating the need to issue AT\Q3 once again.
Notes
• When using XON/XOFF flow control (AT\Q1) in online mode, +++ should not be used while the data trans-
mission is paused with XOFF. Before entering the command mode with +++ the paused transmission should
be resumed using the XON character.
• For compatibility reasons, the AT\Q command can be used in Multiplex mode, though the settings will not
take effect. However, be aware that whenever you use the AT\Q write command in Multiplex mode and then
save the current configuration to the user profile with AT&W, the changed AT\Q setting will become active after
restart.
Exec Command
AT\Q[<n>]
Response(s)
OK
If RTS/CTS flow control is not supported by interface and <n> is 2 or 3:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + ± ± ± - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
4.2 AT&C s
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4.2 AT&C Set Data Carrier Detect (DCD) Line mode
The AT&C command determines how the state of the DCD line (circuit 109) reflects the MC55i's internal activity.
Syntax
Parameter Description
[0] DCD line shall always be on.
1(&F) DCD line shall be on only when data carrier signal is present.
2 DCD line shall be on when one or more Internet services defined on the related
serial channel are in state "Connecting" or "Up" as described below. For details
on the various service states refer to AT^SISI, parameter <srvState> or
AT^SISO, parameter <srvState>.
• SOCKET, HTTP, SMTP, POP3: DCD shall be on when
<srvState>="Connnecting" or "Up"
• FTP: DCD shall be on when data channel is connected, i.e.
<srvState>="Up"
Exec Command
AT&C[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 , SIEMENS - + - + + + - - -
<value>(num)(&W)(&V)
MC55i AT Command Set
4.3 AT&D s
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4.3 AT&D Set Data Terminal Ready (DTR) line mode
AT&D determines how the ME responds if the DTR line is changed from ON to OFF state during data mode.
Syntax
Parameter Description
[0] ME ignores status of the DTR line.
1 ON->OFF on DTR: Change to command mode while retaining the connected
call.
2(&F) ON->OFF on DTR: Disconnect (CSD or PPP) data call and change to com-
mand mode. During OFF state of the DTR line auto-answer is disabled.
Exec Command
AT&D[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + ± + + + - - -
<value>(num)(&W)(&V)
MC55i AT Command Set
4.4 AT&S s
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4.4 AT&S Set Data Set Ready (DSR) line mode
AT&S determines how the ME sets the DSR line depending on its communication state.
Syntax
Parameter Description
[0](&F) DSR line is always ON
1 ME in command mode: DSR is OFF.
ME in data mode: DSR is ON.
Exec Command
AT&S[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + + + - - -
<value>(num)(&W)(&V)
MC55i AT Command Set
4.5 ATE s
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4.5 ATE Enable command echo
The ATE command determines whether or not the TA echoes characters received from TE during command
state.
Syntax
Parameter Description
[0] Echo mode off
1(&F) Echo mode on
Note
• In case of using the command without parameter, <value> is set to 0.
Exec Command
ATE[<value>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)(&W)(&V)
MC55i AT Command Set
4.6 AT+ILRR s
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4.6 AT+ILRR Set TE-TA local rate reporting
The command AT+ILRR controls whether or not the intermediate result code "+ILRR" is transmitted from the TA
to the TE while a connection is being set up. The result code indicates the local rate. It is issued before the final
result code of the connection, e.g. CONNECT, is transmitted to the TE.
Syntax
Intermediate Result Code
+ILRR: <rate>
Indicates local port rate setting upon connection setup.
Parameter Description
0(&F) Disables reporting of local port rate
1 Enables reporting of local port rate
Port rate setting upon connection setup (bps)
0 Autobauding (see Section 4.7.1, Autobauding). Not supported on ASC1.
300
600
1200
2400
4800
9600
14400
Test Command
AT+ILRR=?
Response(s)
+ILRR: (list of supported <value>s)
OK
Read Command
AT+ILRR?
Response(s)
+ILRR: <value>
OK
Write Command
AT+ILRR=<value>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + - + - - - - -
<value>(num)(&W)(&V)
<rate>(num)
MC55i AT Command Set
4.6 AT+ILRR s
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19200
28800
38400
57600
115200
230400
MC55i AT Command Set
4.7 AT+IPR s
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4.7 AT+IPR Set Bitrate of local Asynchronous Serial Interface
AT+IPR allows to query and set the bitrate of the local asynchronous serial interfaces between MC55i and TA.
The test command returns the values of supported automatically detectable bitrates and the values of the sup-
ported fixed bitrates.
The read command returns the current bitrate of the interface.
The write command specifies the bitrate to be used for the interface. Delivery bitrate value (<rate>) is autobaud-
ing enabled (AT+IPR=0) on ASC0 and 57600bps on ASC1. This will not be restored with AT&F. If you set a fixed
rate, make sure that both MC55i and TA are configured to the same rate. A selected bitrate takes effect after the
write commands returns OK, and the setting is stored in non-volatile memory. Using a minimum bitrate of 9600
bps is recommended. The current setting of AT+IPR will be preserved when you download firmware (i.e. a firm-
ware update does not restore the factory setting) or in the event of power failure.
However, in case of autobaud mode (AT+IPR=0) the detected TA bitrate will not be saved and, therefore, needs
to be resynchronized after any restart of the ME (for details refer Section 4.7.1, Autobauding). If you select auto-
bauding, the TA will automatically recognize the bitrate currently used by the TE.
In Multiplex mode the write command will not change the bitrate currently used, but the new bitrate will be stored
and becomes active, when the module is restarted.
Generally, AT+IPR should be used as a standalone command. If nevertheless combinations with other com-
mands on the same command line cannot be avoided, there are several constraints to be considered:
• Avoid combinations with the AT commands listed in Section 1.4.2, Combining AT commands on the same
command line.
• Take into account, that a pause of 100ms is required between the response to the last command (e.g. OK)
and the next command.
• If AT+IPR=0 is entered, autobauding will be activated after the response to the last command is received.
• If local echo is active (ATE1) and AT+IPR=x is entered with other commands you may encounter the following
problem: If switching to the new bitrate takes effect while a response is being transmitted, the last bytes may
be sent with the new bitrate and thus, not properly transmitted. The following commands will be correctly sent
at the new bitrate.
Syntax
Test Command
AT+IPR=?
Response(s)
+IPR: (list of supported auto-detectable <rate>s) , (list of supported fixed-only <rate>s)
OK
Read Command
AT+IPR?
Response(s)
+IPR: <rate>
OK
Write Command
AT+IPR=<rate>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + ± ± ± ± - - -
MC55i AT Command Set
4.7 AT+IPR s
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Parameter Description
bitrate per second (bps)
0 Activates autobauding. Not supported on ASC1. See Section 4.7.1, Autobaud-
ing for further details.
300
600
1200
2400
4800
9600
14400
19200
28800
38400
57600
115200
230400
4.7.1 Autobauding
To take advantage of autobaud mode specific attention must be paid to the following requirements:
• Synchronization between TE and TA:
Ensure that TE and TA are correctly synchronized and the bitrate used by the TE is detected by the TA. To
allow the bitrate to be synchronized simply use an "AT" or "at" string. This is necessary
- after you have activated autobauding
- when you start up the ME while autobauding is enabled. It is recommended to wait 3 to 5 seconds before
sending the first AT character. Otherwise undefined characters might be returned.
If you want to use autobauding and autoanswer at the same time, you can easily enable the TE-TA synchro-
nization, when you activate autobauding first and then configure the autoanswer mode (ATS0 ≠ 0).
• Restrictions on autobauding operation:
- The serial interface shall be used with 8 data bits, no parity and 1 stop bit (factory setting), e.g. 2 stop bits
are not supported for autobaud mode.
- The command A/ cannot be used.
- Only the strings "AT" or "at" can be detected (neither "At" nor "aT").
- The second serial interface ASC1 does not support autobauding.
- URCs that may be issued before the ME detects a new bitrate (by receiving the first AT character) will be
sent at the previously detected bitrate or, after ME restart, at 57600 bps.
- It is not recommended to switch to autobauding from a bitrate that cannot be detected by the autobaud
mechanism (e.g. 300 bps). Responses to AT+IPR=0 and any commands on the same line might be cor-
rupted.
• Autobauding and bitrate after restart:
Unless the bitrate is determined, the following constraints apply:
- An incoming CSD call or a network initiated GPRS request cannot be accepted. This must be taken into
account when autobauding and autoanswer mode (ATS0 ≠ 0) are enabled at the same time, escpecially
if SIM PIN 1 authentication is done automatically and the setting ATS0 ≠ 0 is stored to the user profile with
AT&W.
<rate>(num)(&V)
MC55i AT Command Set
4.7 AT+IPR s
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- Until the bitrate is found, URCs generated after restart will be output at 57600 bps. This applies only to
user defined URCs, such as "+CREG", "CCWA", "^SCKS" etc. The URCs "^SYSSTART", "^SYSSTART
CHARGE-ONLY MODE" and "^SYSSTART ALARM MODE" will not be indicated when autobauding is
enabled.
Note: To avoid any problems caused by undetermined bitrates in the direction from TA to TE we strongly rec-
ommend to configure a fixed bitrate rather than autobauding.
• Autobauding and multiplex mode:
If autobauding is active you cannot switch to multiplex mode (see AT+CMUX).
MC55i AT Command Set
4.8 AT+CMUX s
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4.8 AT+CMUX Enter multiplex mode
All information provided in this section applies to the ASC0 interface only. The second interface ASC1 has no
support of Multiplex mode.
Multiplex mode according to GSM 07.10 and 3G TS 27.010 enables one serial asynchronous interface to be par-
titioned into three virtual channels. This allows you to take advantage of up to 3 simultaneous sessions running
on the serial interface. For example, you can send or receive data or make a call on the first channel, while the
other two channels are free to control the module with AT commands.
The MC55i module incorporates an internal multiplexer and thus integrates all the functions needed to implement
full-featured multiplex solutions. For the application on top, customers have the flexibility to create their own mul-
tiplex programs conforming to the multiplexer protocol. To help system integrators save the time and expense of
designing multiplexer applications, SIEMENS AG offers WinMUX2k, a ready-to-use multiplex driver for Windows
2000 and Windows XP. Another approach is to develop customized solutions based on the sources of the
WinMux2k driver.
Refer to [5] which provides a detailed description of the multiplex architecture and step-by-step instructions of
how to install and configure the multiplex mode. The WinMUX2k driver and its source files can be supplied on
request. Please contact your local distributor to obtain the latest installation software and user's guide.
Syntax
Parameter Description
Multiplexer transparency mechanism
0 Basic option
Subparameters defined in GSM07.07 are adjusted for control and logical channels as follows
0 UIH frames used only (control channel)
Test Command
AT+CMUX=?
Response(s)
+CMUX: (list of supported<mode>s)
OK
Read Command
AT+CMUX?
Response(s)
+CMUX: <mode>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CMUX=<mode>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 07.10 - + - - - - - - +
<mode>(num)
<subset>(num)
MC55i AT Command Set
4.8 AT+CMUX s
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Notes
• The write command is used to enter the multiplex mode. The setup of the logical channels is initiated by the
TE, i.e. the TE acts as initiator. This means that the TE shall ensure that logical channels are established
before any further actions on the channels can be started.
• There is a timeout of five seconds, if the multiplexer protocol is enabled and no multiplexer control channel is
established. The GSM engine returns to AT command mode.
• The parameter maximum frame size (N1) of AT+CMUX in GSM 07.10 is set to 98 bytes by default. All other
parameters are not available. See [5] for further details on the frame size.
4.8.1 Restrictions on Multiplex mode
In multiplex mode, data and fax calls can only be set up on logical channel 1. Due to this restriction, AT com-
mands have a different behavior on channels 2+3 compared to channel 1. Several commands are not available,
others return different responses. This section summarizes the concerned commands. For general rules and
restrictions to be considered in Multiplex mode please refer to [5].
Table 4.1: Availability of AT Commands on Virtual Channels
1) Siemens GSM engines support the registers S0 - S29. You can change S0,S3,S4,S5,S6,S7,S8,S10 and S18 using the
related ATSn commands (see starting from ATS0). The other registers are read-only and for internal use only!
2) The applicability of the +++ escape sequence depends on the customer's external application based on the Mulitplexer
Protocol. Recommendations for implementing an appropriate modem status command (MSC) are provided in [5], Section
"Escape Sequence".
3) PDP contexts can be defined on any channel, but are visible and usable only on the channel on which they are defined
(thus it is not possible to define a context on channel 2 and activate it on channel 3). GPRS connections can be estab-
lishedon two channels at a time.
Command Behavior on channel 1 Behavior on channel 2+3
+++ not usable, but see note 2) not usable, but see note 2)
AT+CBST as described not usable
AT+CRLP as described not usable
AT+CG... (GPRS commands) as described see note 3)
AT+F... (Fax commands) as described not usable
AT&S as described not usable
ATA as described no Data Calls
ATD as described no Data Calls
ATDI as described not usable
ATL as described not usable
ATM as described not usable
ATO as described not usable
ATS6 1) as described not usable
ATS7 1) as described not usable
ATS8 1) as described not usable
ATS10 1) as described not usable
ATS18 1) as described not usable
MC55i AT Command Set
4.8 AT+CMUX s
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Table 4.2: Summary of AT commands with Different Behavior in Multiplex Mode
Command Description
AT\Q It is recommended to use hardware flow control (AT\Q3). XON/XOFF flow control
(AT\Q1) is not supported in Multiplex mode.
See note regarding AT\Qn settings stored with AT&W if Multiplex mode is active.
AT&V Different default configurations on channels 1, 2 and 3.
AT&W Different user profiles can be stored on each channel.
AT+IPR Before you start Multiplex mode, it is recommended to set the ME to 57600 bps
(minimum should be 4800 bps). For GPRS we suggest to use 115200 bps or
230400 bps.
In Multiplex mode, the write command AT+IPR=<rate> will not change the bit rate
currently used, but the new bit rate will be stored and becomes active, when the
module is restarted.
AT+IPR=0 Multiplex mode cannot be activated while autobauding is enabled.
AT+CALA On each channel an individual <text> message can be stored. but only one time
setting applies to all channels. This means an alarm <time> set on one of the
channels overwrites the time setting on all remaining channels. Therefore, the total
number of alarm events returned by the read command AT+CALA? will always be
<n>=0, no matter whether individual text messages are stored.
When the alarm is timed out and executed the ME sends the URC only on the
channel where the most recent alarm setting was made. The alarm time will be
reset to "00/01/01,00:00:00" on all channels.
AT+CMEE Presentation mode can be separately configured for each channel.
AT+CNMA If Multiplex mode is activated the +CNMI parameter will be set to zero on all chan-
nels, if one channel fails to acknowledge an incoming message within the required
time.
AT+CNMI Phase 2+ parameters can only be used on one channel. The parameter for <mt>
and <ds> on the other channels have to be set to zero. If either a SM or a Status
Report is not acknowledged, all +CNMI parameter will be set to zero on all chan-
nels.
AT+CFUN If the ME is in Multiplexer mode, it is not recommended to activate SLEEP mode
with AT+CFUN=<fun>. The best approach to properly control SLEEP mode in this
case is to issue the PSC messages described in [5], Section "Power saving control
(PSC)".
AT+CPMS Parameter <mem3> will be the same on all instances, but the settings of <mem1>
and <mem2> may vary on each instance.
AT^SSDA If one instance is set to <da>=1 and <mt>=1, then all other instances must be con-
figured for <mt>=0.
MC55i AT Command Set
5. Security Commands s
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5. Security Commands
The AT Commands described in this chapter allow the external application to determine various security related
settings.
5.1 AT+CPIN PIN Authentication
The AT+CPIN write command can be used to enter one of the passwords listed below. The read command can
be used to check whether or not the ME is waiting for a password, or which type of password is required.
This may be for example the SIM PIN1 to register to the GSM network, or the SIM PUK1 to replace a disabled
SIM PIN1 with a new one, or the PH-SIM PIN if the client has taken precautions for preventing damage in the
event of loss or theft etc. If requested by the ME AT+CPIN may also be used for the SIM PIN2 or SIM PUK2.
If no PIN1 request is pending (for example if PIN1 authentication has been done and the same PIN1 is entered
again) MC55i responds "+CME ERROR: operation not allowed"; no further action is required.
Each time a password is entered with AT+CPIN the module starts reading data from the SIM. The duration of
reading varies with the SIM card. This may cause a delay of several seconds before all commands which need
access to SIM data are effective. See Section 20.1, Restricted access to SIM data after SIM PIN authentication
for further detail.
Syntax
Test Command
AT+CPIN=?
Response(s)
OK
Read Command
AT+CPIN?
Response(s)
+CPIN: <code>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CPIN=<pin>[, <new pin>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
MC55i AT Command Set
5.1 AT+CPIN s
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Parameter Description
Password (string type), usually SIM PIN1.
If the requested password was a PUK, such as SIM PUK1 or PH-FSIM PUK or another password, then <pin>
must be followed by <new pin>.
If the requested code was a PUK: specify a new password or restore the former disabled password. See Section
5.1.1, What to do if PIN or password authentication fails? for more information about when you may need to
enter the PUK.
SIM PIN authentication
READY PIN has already been entered. No further entry needed.
SIM PIN ME is waiting for SIM PIN1.
SIM PUK ME is waiting for SIM PUK1 if PIN1 was disabled after three failed attempts to
enter PIN1.
SIM PIN2 ME is waiting for PIN2. This is only applicable when an attempt to access a
PIN2 related feature was acknowledged with +CME ERROR: 17 ("SIM PIN2
required"), for example when the client attempts to edit the FD phonebook). In
this case the read command AT+CPIN? also prompts for SIM PIN2. Normally,
the AT+CPIN2 command is intended for SIM PIN2.
SIM PUK2 ME is waiting for PUK2 to unblock a disabled PIN2. As above, this is only nec-
essary when the preceding command was acknowledged with +CME ERROR:
18 ("SIM PUK2 required") and only if the read command AT+CPIN? also
prompts for SIM PUK2. Normally, the AT+CPIN2 command is intended for SIM
PUK2.
Phone security locks set by client or factory
PH-SIM PIN ME is waiting for phone-to-SIM card password if "PS" lock is active and the cli-
ent inserts other SIM card than the one used for the lock. ("PS" lock is also
referred to as phone or antitheft lock).
PH-SIM PUK ME is waiting for Master Phone Code, if the above "PS" lock password was
incorrectly entered three times.
PH-FSIM PIN ME is waiting for phone-to-very-first-SIM card. Necessary when "PF" lock was
set. When powered up the first time, ME locks itself to the first SIM card put into
the card holder. As a result, operation of the mobile is restricted to this one SIM
card (unless the PH-FSIM PUK is used as described below).
PH-FSIM PUK ME is waiting for phone-to-very-first-SIM card unblocking password to be
given. Necessary when "PF" lock is active and other than first SIM card is
inserted.
PH-NET PUK ME is waiting for network personalisation unblocking password
PH-NS PIN ME is waiting for network subset personalisation password
PH-NS PUK ME is waiting for network subset unblocking password
PH-SP PIN ME is waiting for service provider personalisation password
PH-SP PUK ME is waiting for service provider personalisation unblocking password
PH-C PIN ME is waiting for corporate personalisation password
PH-C PUK ME is waiting for corprorate personalisation un-blocking password
<pin>(str)
<new pin>(text)
<code>(text)
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Notes
• Successful PIN authentication only confirms that the entered PIN was recognized and correct. The output of
the result code OK does not necessarily imply that the mobile is registered to the desired network.
Typical example: PIN was entered and accepted with OK, but the ME fails to register to the network. This may
be due to missing network coverage, denied network access with currently used SIM card, no valid roaming
agreement between home network and currently available operators etc.
MC55i offers various options to verify the present status of network registration: For example, the AT+COPS
command indicates the currently used network. With AT+CREG you can also check the current status and acti-
vate an unsolicited result code which appears whenever the status of the network registration changes (e.g.
when the ME is powered up, or when the network cell changes).
•<pin> and <new pin> can also be entered in quotation marks (e.g. "1234").
• To check the number of remaining attempts to enter the passwords use the AT^SPIC command.
•See AT+CPWD and AT^SPWD for information on passwords.
•See AT+CLCK and AT^SLCK for information on lock types.
5.1.1 What to do if PIN or password authentication fails?
PIN1 / PUK1:
After three failures to enter PIN 1, the SIM card is blocked (except for emergency calls). +CME ERROR: 12 will
prompt the client to unblock the SIM card by entering the associated PUK (= PIN Unblocking Key / Personal
Unblocking Key). After ten failed attempts to enter the PUK, the SIM card will be invalidated and no longer oper-
able. In such a case, the card needs to be replaced. PIN1 consists of 4 to 8 digits, PUK1 is an 8-digit code only.
To unblock a disabled PIN1 you have two options:
• You can enter AT+CPIN=PUK1,new PIN1.
• You can use the ATD command followed by the GSM code **05*PUK*newPIN*newPIN#;.
PIN2 / PUK2:
PIN2 prevents unauthorized access to the features listed in AT+CPIN2. The handling of PIN2 varies with the pro-
vider. PIN2 may either be a specific code supplied along with an associated PUK2, or a default code such as
0000. In either case, the client is advised to replace it with an individual code. Incorrect input of PUK2 will per-
manently block the additional features subject to PIN2 authentification, but usually has no effect on PIN1. PIN2
consists of 4 digits, PUK2 is an 8-digit code only.
To unblock a disabled PIN2 you have two options:
• You can enter AT+CPIN2=PUK2,new PIN2.
• You can use the ATD command followed by the GSM code **052*PUK2*newPIN2*newPIN2#;.
Phone lock:
If the mobile was locked to a specific SIM card (= "PS" lock or phone lock), the PUK that came with the SIM card
cannot be used to remove the lock. After three failed attempts to enter the correct password, ME returns +CPIN:
PH-SIM PUK (= response to read command AT+CPIN?), i.e. it is now waiting for the Master Phone Code. This
is an 8-digit device code associated to the IMEI number of the mobile which can only by obtained from the man-
ufacturer or provider. When needed, contact Siemens AG and request the Master Phone Code of the specific
module.
There are two ways to enter the Master Phone code:
• You can enter AT+CPIN=Master Phone Code
• You can use the ATD command followed by the GSM code *#0003*Master Phone Code#;.
Usually, the Master Phone Code will be supplied by mail or e-mail. If the received number is enclosed in the *#
codes typically used for the ATD option, it is important to crop the preceding *#0003* characters and the
appended #.
Example: You may be given the string *#0003*12345678#. When prompted for the PH-SIM PUK simply enter
12345678.
If incorrectly input, the Master Phone Code is governed by a specific timing algorithm: (n-1)*256 seconds (see
table below). The timing should be considered by system integrators when designing an individual MMI.
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SIM locks:
These are factory set locks, such as "PF", "PN", "PU", "PP", "PC". An 8-digit unlocking code is required to operate
the mobile with a different SIM card, or to lift the lock. The code can only be obtained from the provider.
Failure to enter the password is subject to the same timing algorithm as the Master Phone Code (see Table
above).
Call barring:
Supported modes are "AO", "OI", "OX", "AI", "IR", "AB", "AG", "AC". If the call barring password is entered incor-
rectly three times, the client will need to contact the service provider to obtain a new one.
Related sections:
"+CME ERROR: <err>" values are specified at Section 2.11.1, CME/CMS Error Code Overview. For further
instructions and examples see AT+CLCK, AT^SLCK, AT+CPWD and AT^SPWD.
For a complete list of Star-Hash codes please refer Section 20.2, Star-Hash (*#) Network Commands.
Number of failed attempts Time to wait before next input is allowed
1st failed attempt No time to wait
2nd failed attempt 4 seconds
3rd failed attempt 3 * 256 seconds
4th failed attempt 4 * 256 seconds
5th failed attempt 5 * 256 seconds
6th failed attempt and so forth 6 * 256 seconds and so forth
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5.2 AT+CPIN2 PIN2 Authentication
AT+CPIN2 controls network authentication of the MC55i.
The read command returns an alphanumeric string indicating whether or not network authentication is required.
The write command allows the MC55i to store the entered password. This may be for example the SIM PIN2 to
benefit from the features listed below, or the SIM PUK2 to replace a disabled PIN2 with a new one. Note that
PIN2 can only be entered if PIN1 authentication was done.
If the MC55i is requesting SIM PUK2, use <pin> to enter the PUK2, followed by <new pin> to specify the new
PIN2.
Syntax
Parameter Description
Password (string type), usually SIM PIN2 or, if requested, SIM PUK2.
If the requested code was SIM PUK2: new password (PIN2).
See Section 5.1.1, What to do if PIN or password authentication fails? for more information about when you may
need to enter the PUK.
READY ME is not pending for any password.
SIM PIN2 ME is waiting for SIM PIN2.
This <code> is returned only when PIN2 authentication has not yet been done
or has failed ("+CME ERROR:17").
SIM PUK2 ME is waiting for SIM PUK2.
This <code> is returned only when PIN2 authentication has failed and ME is
pending for SIM PUK2 (i.e. "+CME ERROR:18").
Test Command
AT+CPIN2=?
Response(s)
OK
Read Command
AT+CPIN2?
Response(s)
+CPIN2: <code>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CPIN2=<pin>[, <new pin>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<pin>(str)
<new pin>(str)
<code>(text)
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Note
• Functions accessible only after PIN2 authentication:
AT+CACM: Accumulated call meter (ACM) reset or query
AT+CAMM: Accumulated call meter maximum (ACMmax) set or query
AT+CLCK: Facility lock to "FD" (Fixed dialing phonebook)
AT^SLCK: Facility lock to "FD" (Fixed dialing phonebook)
AT+CPWD: Change "P2"password
AT^SPWD: Change "P2"password
AT+CPUC: Price per unit and currency table
AT+CPIN2: Enter SIM PIN2 or SIM PUK2 if requested.
For example, SIM PIN2 will be needed when you attempt to edit the "FD" phonebook and ME returns "+CME
Error 17" or "+CPIN: SIM PIN2".
Once the required <pin> has been entered correctly, PIN2 authentication code changes to READY. After
300s, a repetition of the authentication process is required (PIN2 authentication code changes from READY
to SIM PIN2).
Examples
EXAMPLE 1
Change PIN2
EXAMPLE 2
Unblock a disabled PIN2
EXAMPLE 3
Write into "FD" phonebook
AT+CPWD="P2","0000","8888"
(where "0000" = old PIN2 and "8888" = new PIN2)
OK
AT+CPIN2?
+CPIN2: SIM PUK2
PIN2 has been disabled, PUK2 must be entered
OK
to define a new PIN2
AT+CPIN2=12345678,8888
where "12345678" is the PUK2, and "8888" the new
PIN2.
AT+CPBS="FD"
OK
AT+CPBW=2,"+493012345678",145,"Charly"
+CME ERROR 17
access denied due to missing PIN2 authentication
AT+CPIN2=8888
OK
AT+CPBW=2,"+493012345678",145,"Charly"
OK
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5.3 AT^SPIC Display PIN counter
The AT^SPIC command can be used to find out whether the ME is waiting for a password and, if so, how many
attempts are left to enter the password.
The execute command returns the number of attempts still available for entering the currently required password,
for example the PIN, PUK, PH-SIM PUK etc.
The read command AT^SPIC? indicates which password the number of attempts stated by the execute com-
mand actually refers to. Also, the write command may be used to query the counter for a specific password: It
indicates the number of attempts still available for entering the password identified by <facility>, for example
the PIN, PIN2, PH-SIM PIN etc.
To check whether or not you need to enter a password use the read commands AT+CPIN?, AT+CPIN2? and
AT^SPIC?. If the response to AT+CPIN? is "READY" the counter of the execute command AT^SPIC relates to
PIN2. See last example. If the responses to AT+CPIN? and AT+CPIN2? both read "READY", no password is
currently required, and the referrer of the execute command AT^SPIC is explicitly undefined.
Syntax
Parameter Description
Number of attempts left to enter the currently required password. This number will be counted down after each
failure.
Test Command
AT^SPIC=?
Response(s)
OK
Read Command
AT^SPIC?
Response(s)
^SPIC: <code>
OK
Exec Command
AT^SPIC
Response(s)
^SPIC: <counter>
OK
Write Command
AT^SPIC=<facility>
Response(s)
^SPIC: <counter>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<counter>(num)
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Password for which the corresponding PIN counter is to be displayed.
“SC“ SIM PIN or SIM PUK. If the SIM PIN has been deactivated after three failed
attempts, the counter for SIM PUK will be returned instead.
“PS“ "Phone code" or "device code" (cf. AT+CLCK and AT+CPWD). If incorrectly
entered three times, the Master Phone Code is required to lift the lock and the
number of remaining attempts for the master phonecode will be returned.
“P2“ SIM PIN2 or SIM PUK2. If the SIM PIN2 has been deactivated after three failed
attempts, the counter for SIM PUK2 will be returned instead.
“PN“ Network Personalisation
Identification of the currently required password.
SIM PIN ME is waiting for SIM PIN1.
SIM PUK ME is waiting for SIM PUK1 if PIN1 was disabled after three failed attempts to
enter PIN1.
SIM PIN2 ME is waiting for PIN2, when the attempt to access PIN2 requiring features was
acknowledged with +CME ERROR:17 (e.g. if the user attempts to edit the FD
phonebook).
SIM PUK2 ME is waiting for PUK2 to unblock a disabled PIN2. Necessary if preceding
command was acknowledged with +CME ERROR:18.
PH-SIM PIN ME is waiting for phone-to-SIM card password if ''PS'' lock is active and user
inserts other SIM card than the one used for the lock. (''PS'' lock is also referred
to as phone or antitheft lock).
PH-SIM PUK ME is waiting for Master Phone Code, if the above ''PS'' lock password was
incorrectly entered three times.
PH-NET PUK ME is waiting for network personalisation unblocking password
Notes
• Whenever the required password changes, <counter> changes to reflect that change. Please refer to the
examples below.
• For passwords associated to the phone lock (''PS'' lock set by user or factory) or other factory set locks, such
as ''PF'', ''PN'', ''PU'', ''PP'', ''PC'' the number of attempts is subject to a timing algorithm explained in
AT+CPIN. If these passwords are incorrectly entered the counter first returns 3, 2 and 1 remaining attempt(s),
but then gives the total number of attempts which amounts to 63 (see example below).
• See also Chapters AT+CLCK, AT+CPIN, AT+CPIN2, AT+CPWD, AT^SLCK for further information on locks and
passwords.
Examples
EXAMPLE 1
The user fails to provide a correct SIM PIN three times. The counter decreases each time. After the counter
reaches zero, the SIM PUK is required. After each failure to enter a correct SIM PUK, the counter decreases.
<facility>(str)
<code>(text)
at+cpin?
+CPIN: SIM PIN
OK
Currently required password is PIN1.
at^spic
^SPIC: 3
OK
3 attempts left.
at+cpin=9999
+CME ERROR: incorrect password
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EXAMPLE 2
Though a mobile is locked to a specific SIM card (phone lock), the user attempts to operate it with another
SIM card. The user correctly enters the SIM PIN of the SIM card currently inserted, but then fails to give the
''PS'' lock password (PH-SIM PUK):
at^spic
^SPIC: 2
2 attempts left.
OK
at+cpin=9999
+CME ERROR: incorrect password
OK
at^spic
^SPIC: 1
1 attempt left.
OK
at+cpin=9999
+CME ERROR: incorrect password
at+cpin?
+CPIN: SIM PUK
OK
Now required password is PUK 1.
at^spic
^SPIC: 10
OK
10 attempts left for PUK 1.
at+cpin=01234567,1234
+CME ERROR: incorrect password
at^spic
^SPIC: 9
OK
9 attempts left for PUK 1.
at+cpin=9999
OK
at+cpin?
+CPIN: PH-SIM PIN
ME is waiting for the phone lock password.
OK
at^spic
^SPIC: 3
3 attempts left.
OK
at+cpin=4711
+CME ERROR: incorrect password
at^spic?
^SPIC: 2
2 attempts left.
OK
at+cpin=4712
+CME ERROR: incorrect password
at^spic
^SPIC: 1
1 attempt left.
OK
at^spic?
^SPIC: PH-SIM PIN
Displayed counter refers to phone lock password.
OK
at+cpin=4713
+CME ERROR: incorrect password
at^spic
^SPIC: 63
OK
at^spic?
^SPIC: PH-SIM PUK
Displayed counter refers to master phone code.
OK
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EXAMPLE 3
This example shows that after successful SIM PIN1 authentication the counter of the AT^SPIC execute and
read command refers to SIM PIN2, i.e. it does not reflect the status of SIM PIN1. This may be a problem if
the user enters a wrong PIN1 and is not aware that the number of attempts left to enter SIM PIN1 is counted
down.
To avoid conflicts we recommend to use the AT^SPIC read and write commands rather than the execute com-
mand only. The read command clearly states the currently required password, and the write command may
be used to get the counter for a specific <facility>, in this case for example "P2".
at+cpin=4714
+CME ERROR: incorrect password
at^spic
^SPIC: 63
OK
+CREG: 0
at+cpin=1234
OK
+CREG: 2
+CREG: 1
The mobile ist properly registered to the network.
at+cpin?
+CPIN: READY
The AT+CPIN? read command confirms that SIM
PIN1 authentication was successful.
at^spic
^SPIC: 3
As SIM PIN1 authentication was successful, the
counter relates to SIM PIN2 and correctly indicates
that the user has 3 attempts to enter SIM PIN2.
OK
AT^SPIC?
Likewise, the read command notifies that the ME is
waiting for SIM PIN2.
^SPIC: SIM PIN2
OK
at+clck="SC",0,456789
First attempt to enter a wrong SIM PIN1.
CME ERROR: incorrect password
at^spic
^SPIC: 3
SIM PIN1 authentication is still valid, and the counter
relates to SIM PIN2.
at+clck="SC",0,456789
Second attempt to enter a wrong SIM PIN1.
CME ERROR: incorrect password
at^spic
^SPIC: 3
SIM PIN1 authentication is still valid, and the counter
relates to SIM PIN2.
at+clck="SC",0,456789
Third attempt to enter a wrong SIM PIN1.
CME ERROR: incorrect password
+CREG: 0
SIM PIN1 authentication is no longer valid.
at^spic
^SPIC: 10
This time, after the SIM PIN1 code has been dis-
abled, the counter indicates the status of SIM PIN1
and notifies that 10 attempts are left to enter the SIM
PUK.
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5.4 AT+CLCK Facility lock
AT+CLCK can be used to lock, unlock or interrogate a network or ME <facility>. The command can be
aborted when network facilities are being set or interrogated.
Syntax
Parameter Description
Phone security locks set by client or factory
Primarily intended for the client to take safety precautions, "SC", "PS" and "FD" can be configured individually.
"PS" may also be factory set.
Parameter <class> is not applicable to security locks.
See examples below for further details.
“SC“ SIM (lock SIM cards). SIM requests password upon ME power-up and when
this lock command is issued.
<password>: SIM PIN1.
“PS“ Phone locked to SIM card. ME requests password when other than current SIM
card is inserted.
"PS" lock is frequently referred to as "phone lock", or "device lock". Accord-
ingly, the password may be called "phone code" or "device code". The "PS"
password is not associated with the PUK of the SIM card. If incorrectly entered
three times, the Master Phone Code is required to lift the lock. This is an 8-digit
device code associated to the IMEI number of the mobile which can only be
obtained from the manufacturer of the module. Once the Master Phone Code
has been acctepted, the mobile is operational, and the "PS" lock is no longer
active. If needed it must be set once again.
Test Command
AT+CLCK=?
Response(s)
+CLCK:list of supported <facility>s
OK
Write Command
AT+CLCK=<facility>, <mode>[, <password>][, <class>]
Response(s)
if <mode> is not equal 2 and command successful:
OK
if <mode>= 2 and command successful:
+CLCK: <status>[, <class>]
[+CLCK: <status>[, <class>]]
[+CLCK: ...]
OK
If error is related to ME functionality
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.04, GSM 02.88,
GSM 03.88, GSM 04.88
+ + + + + + - - -
<facility>(str)
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<password>: User defined password. It is needed before the first use of
<facility> "PS" and, therefore, must first be specified with AT+CPWD or
AT^SPWD, if it has not been predefined by factory settings. If set by factory (e.g.
for a prepaid mobile), the password is supplied by the provider or operator.
“FD“ SIM fixed dialing memory: If the mobile is locked to "FD", only the phone num-
bers stored to the "FD" memory can be dialed. (Capacity of the "FD" phone-
book is depending on the SIM card).
<password>: SIM PIN 2.
If a lock on the SIM fixed dialing memory is active, the following applies:
• Outgoing voice, data or fax calls can be made only to numbers stored in the
"FD" phonebook.
Result code for calls to numbers not stored in the "FD" phonebook depends
on the type of the call:
for voice calls, indication is "+CME Error 257: Call barred".
for data and fax calls, indication is "NO CARRIER".
• Access to defined Supplementary Services such as Call barring, Call wait-
ing, Call forwarding, Call hold and Multiparty is possible only if the exact cor-
responding public MMI *# code for the desired service is stored in the "FD"
phonebook and used with ATD.
AT commands for supplementary service control are barred while "FD" lock
is active.
Indication is ''+CME Error 257: Call barred''.
• Access to Unstructured Supplementary Services ("USSD") is possible only
if the exact desired USSD string is stored in the "FD" phonebook and used
with ATD.
AT commands for USSD are barred while "FD" lock is active.
Indication is ''+CME Error 257: Call barred''.
• SMS can be sent only to phone numbers which are stored in the "FD"
phonebook.
Indication is ''+CMS Error 302: operation not allowed''.
• GPRS commands can be used only if the "FD" phonebook contains an
entry with phone number ''*99#''. This single entry enables all GPRS com-
mands, including AT commands and modem compatibility commands like
''ATD*99***1#'' or ''ATD*98***1#''.
Indication is ''+CME Error 257: Call barred''.
Factory defined SIM locks:
Typical examples of factory set SIM locks are prepaid phones or network locks, used to restrict the operation of
a mobile to a specific provider or operator. The client should be aware that each of these lock types can only be
unlocked if the associated password is available. For example, a mobile can be locked to accept only SIM cards
from the respective provider, or even one single SIM card. Once a different SIM card is inserted the ME will
prompt the client to enter a specific code. This is not the PUK of the SIM card, but usually an 8-digit code which
needs to be requested from the provider.
The locks can only be set by the manufacturer and need to be agreed upon between the parties concerned, e.g.
provider, operator, distributor etc. on the one side and the manufacturer on the other side. For details contact
your local dealer or Siemens AG.
Parameter <class> is not applicable to SIM locks.
<password> and instructions for unlocking must be obtained from the network provider.
“PF“ lock Phone to the very First SIM card
“PN“ Network Personalisation
“PU“ Network subset Personalisation
“PP“ Service Provider Personalisation
“PC“ Corporate Personalisation
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Supplementary Service Call Barring:
Supplementary Service "Call Barring" allows to specify conditions under which calls will be disallowed by the
network.
The availability of the Supplementary Services varies with the network. To benefit from call barring the client will
need to subscribe them, though a limited number of call barring types may be included in the basic tariff pack-
age.
When you attempt to set a <facility> or <class> which is not provisioned, not yet subscribed to, or not sup-
ported by the module, the setting will not take effect regardless of the response returned. The responses in these
cases vary with the network (for example "OK", "+CME ERROR: Operation not allowed", "+CME ERROR: Oper-
ation not supported" etc.). To make sure check the extended error response with AT+CEER and the lock status
with <mode>=2.
<password>: Network password supplied from the provider or operator. Usually there is one password which
applies to all call barring options. For details contact your provider.
“AO“ BAOC (Bar All Outgoing Calls)
“OI“ BOIC (Bar Outgoing International Calls)
“OX“ BOIC-exHC (Bar Outgoing International Calls except to Home Country)
“AI“ BAIC (Bar All Incoming Calls)
“IR“ BIC-Roam (Bar Incoming Calls when Roaming outside the home country)
“AB“ All Barring services (applicable only for <mode>=0)
“AG“ All outGoing barring services (applicable only for <mode>=0)
“AC“ All inComing barring services (applicable only for <mode>=0)
0 unlock
1lock
2 query status
0 lock is inactive
1 lock is active
Password string used to lock and to unlock a <facility>. Length and authority for passwords depend on the
<facility> in question and are therefore listed in the section on parameter <facility>. Passwords can be
modified with AT+CPWD or AT^SPWD.
Integer or sum of integers each representing a class of information, i.e. a bearer service, telecommunication ser-
vice or bearer service group as defined in "GSM 02.04".
1voice
2 class 2 ("data") comprises all those individual data classes between 16 and
128, that are supported both by the network and the MS. This means, a setting
made for class 2 applies to all individual data classes (if supported). In addition,
you can assign a different setting to a specific class. For example, you can acti-
vate Call Forwarding for all data classes, but deactivate it for data class 64,
"dedicated packet access".
4fax
8SMS
16 data circuit sync
32 data circuit async
<mode>(num)
<status>(num)
<password>(str)
<class>(num)
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64 dedicated packet access
128 dedicated PAD access
1...[7]...255 combination of some of the above classes.
For example, the default setting 7 represents the sum of the integers 1, 2 and
4 (voice, data and fax).
The value 255 covers all classes.
If parameter "class" is omitted, the default value 7 is used.
Notes
•The AT+CLCK command offers the full range of <class> parameters according to the GSM specifications.
However, when you attempt to use a service option which is not provisioned or not yet subscribed to, the set-
ting will not take effect regardless of the response returned.
The responses in these cases vary with the network (for example "OK", "Operation not allowed", "Operation
not supported" etc.). To make sure check the extended error response with AT+CEER and the lock status with
<mode>=2.
• The command has been implemented with the full set of <class> parameters according to GSM 07.07. For
actual applicability of a desired Call barring service to a specific service or service group (a specific <class>
value) please consult table A.1 of GSM 02.04.
• If an outgoing Fax or Data Call is rejected due to an active ''call barring'' supplementary service, the call will
be terminated with result code NO CARRIER.
Under the same conditions, an outgoing Voice call will be terminated with result code NO DIALTONE.
• If an invalid <password> is entered several times in succession, a delay incremented after each failed
attempt will increase the time to wait before the input of the <password> is accepted. To avoid blocking the
serial interface the running AT+CLCK command is aborted after a short timeout and returns CME ERROR 100
("unknown"). If then the AT+CLCK command is issued once again execution is denied with CME ERROR 256
("Operation temporary not allowed"). For details regarding the delay see Section 5.1.1, What to do if PIN or
password authentication fails?.
• If the user tries to set a lock although it is already active or, the other way round, tries to unlock an inactive
lock, the response will be OK, but the <password> will not be checked or verified.
Examples
EXAMPLE 1
Lock SIM card (<facility>= "SC")
To query the status of the SIM card lock:
AT+CLCK="SC",1,"9999"
The "SC" parameter enables or disables the SIM PIN authentication
(PIN 1) when you power up the GSM engine
OK
SIM card locked. As a result, SIM PIN 1 must be entered to enable ME
to register to the GSM network.
AT+CLCK="SC",0,"9999"
Unlocks SIM card.
OK
When powered up, ME registers to the GSM network without requesting
SIM PIN1.
Note: Depending on the services offered by the provider, this feature is
not supported by all SIM card types. If so, the command returns ERROR
when you attempt to unlock the card.
AT+CLCK="SC",2
Query the status of SIM card lock.
+CLCK: 1
SIM card is locked. SIM PIN1 must be entered to enable ME to register
to the GSM network.
OK
MC55i AT Command Set
5.4 AT+CLCK s
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EXAMPLE 2
Phone lock (<facility>="PS")
To lock the ME to the currently inserted SIM card, first specify a password for <facility> "PS":
Optionally, if "PS" password was defined before, change existing password:
Then, activate the Phone Lock:
To operate the mobile with the SIM card for which "PS" lock was activated:
To operate the mobile with other SIM card than the one used for the "PS" lock:
Enter SIM PIN of present card, followed by "PS" lock password.
To deactivate the Phone Lock:
AT+CPIN?
Make sure that PIN1 authentication is valid.
OK
AT+CPWD="PS",,"1234"
If "PS" lock has not been set before: enter new password.
OK
AT+CPWD="PS","1234","3333"
To replace existing "PS" password: Enter old and new password.
OK
AT+CLCK="PS",1,"3333"
Locks the mobile to the current SIM card.
OK
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CPIN="9999"
OK
No additional password is required for operation (SIM recognized by
mobile).
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CPIN="1111"
OK
PIN authentication accepted.
AT+CPIN?
+CPIN: PH-SIM PIN
"PS" lock password is required.
OK
AT+CPIN="3333"
OK
"PS" Lock password has been accepted. ME is fully operational now.
AT+CLCK="PS",0,"3333"
Phone Lock password has to be provided again.
OK
Now the mobile can be used with any SIM card, without the need of the
phone lock password.
MC55i AT Command Set
5.5 AT^SLCK s
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5.5 AT^SLCK Facility lock
AT^SLCK provides the "Facility lock" function as defined for the GSM 07.07 command AT+CLCK. The command
can be used to lock, unlock or interrogate a network or ME <facility>.
AT^SLCK is, in every respect, identical with AT+CLCK, except that the command syntax and response prefix is
"^SLCK" instead of "+CLCK". For further details please refer to AT+CLCK.
The command can be aborted when network facilities are being set or interrogated.
Syntax
Test Command
AT^SLCK=?
Response(s)
^SLCK:list of supported <facility>s
OK
Write Command
AT^SLCK=<facility>, <mode>[, <password>][, <class>]
Response(s)
if <mode> is not equal 2 and command successful:
OK
if <mode>= 2 and command successful:
^SLCK: <status>, <class>
[^SLCK: <status>, <class>]
[^SLCK: ...]
OK
If error is related to ME functionality
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS, GSM 07.07, GSM 02.04,
GSM 02.88, GSM 03.88, GSM 04.88
+ + + + + + - - -
MC55i AT Command Set
5.6 AT+CPWD s
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5.6 AT+CPWD Change Password
AT+CPWD allows to define a new password for a password protected <facility> lock function. Each password
is a string of digits, the length of which varies with the associated <facility>. The test command returns a list
of pairs which represent the available facilities and the maximum length of the associated password. See AT
commands AT+CLCK and AT^SLCK for more information on the various lock features.
Specifically the command can be used to
• change PIN1 or PIN2,
• change the password supplied from your provider for the "call barring" supplementary service,
• set individual phone security passwords,
• enter the unblocking key (Master Phone Code) to restore a disabled "PS" password.
To delete a password use the following syntax: at+cpwd=<facility>,<old password>
Syntax
Parameter Description
Phone security locks set by client or factory:
Primarily intended for the client to take safety precautions, passwords "SC" (SIM PIN) and "P2" (SIM PIN2) are
usually predefined, but can be configured individually. The password for lock facility "PS" may also be factory
set.
“SC“ SIM PIN. SIM requests password upon ME power-up and when this lock com-
mand is issued.
If incorrectly entered three times, the SIM PUK is required to perform authen-
tication. Input of the SIM PUK password is possible only with AT command
AT+CPIN or ATD. For further details please refer to Section 5.1.1, What to do
if PIN or password authentication fails?.
<password length>: 4 to 8 digits.
Test Command
AT+CPWD=?
Response(s)
+CPWD:list of supported (<facility>, <password length>)
OK
Write Command
AT+CPWD=<facility>, <old password>[, <new password>]
Response(s)
New password has been registered for the facility lock function.
OK
If parameter <old password> was not correct:
+CME ERROR 16 (+CME ERROR: incorrect password)
If the password for the selected <facility> has been invalidated due to too many failed attempts:
+CME ERROR ...
If error is related to ME functionality:
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<facility>(str)
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“PS“ Phone locked to SIM card. ME requests password when other than current SIM
card is inserted.
"PS" lock is frequently referred to as "phone lock", or "device lock". Accord-
ingly, the password may be called "phone code" or "device code". The "PS"
password is not associated with the PUK of the SIM card. It must be defined
before the first use of <facility> "PS" with AT+CLCK.
<password length>: 4 digits.
If incorrectly entered three times, the Master Phone Code is required to lift the
lock. This Unblocking procedure is performed with AT+CPWD using the follow-
ing parameters: <facility>="PS", <old password>= Master Phone Code
(to be obtained from the module manufacturer), and <new password>= the
new phone code ("PS" password for lock facility), if desired.
Mind that successful PIN authentication is a prerequisite for use of AT com-
mand AT+CPWD. If Pin authentication has not been completed, input of the
Master Phone code password is possible only with AT command AT+CPIN or
ATD. For further detail please refer to Section 5.1.1, What to do if PIN or pass-
word authentication fails?.
Once the Master Phone Code has been acctepted, the mobile is operational,
and the "PS" lock is no longer active. If needed it must be set once again with
AT+CLCK.
“P2“ SIM PIN 2, e.g. required for authentication with facility lock "FD" (cf. AT+CLCK).
If incorrectly entered three times, the SIM PUK 2 is required to perform authen-
tication. Input of the SIM PUK 2 password is possible only with AT command
AT+CPIN2 or ATD. For further detail please refer to Section 5.1.1, What to do
if PIN or password authentication fails?.
<password length>: 4 to 8 digits.
Factory defined SIM locks:
Typical examples of factory set SIM locks are prepaid phones or network locks, used to restrict the operation of
a mobile to a specific provider or operator. The client should be aware that each of these lock types can only be
unlocked if the associated password is available. For example, a mobile can be locked to accept only SIM cards
from the respective provider, or even one single SIM card. Once a different SIM card is inserted the ME will
prompt the client to enter a specific code. This is not the PUK of the SIM card, but usually an 8-digit code which
needs to be requested from the provider.
The locks can only be set by the manufacturer and need to be agreed upon between the parties concerned, e.g.
provider, operator, distributor etc. on the one side and the manufacturer on the other side. For details contact
your local dealer or Siemens AG.
“PF“ Lock Phone to the very First SIM card
“PN“ Network Personalisation
“PU“ Network subset Personalisation
“PP“ Service Provider Personalisation
“PC“ Corporate Personalisation
Supplementary Service Call Barring:
Supplementary Service "Call Barring" allows to specify conditions under which calls will be disallowed by the
network.
The availability of the Supplementary Services varies with the network. To benefit from call barring the client will
need to subscribe them, though a limited number of call barring types may be included in the basic tariff pack-
age.
<password length>: The Network Password needs to be supplied from the network provider or network oper-
ator. Usually there is one 4 digit password which applies to all call barring options. For details contact your pro-
vider.
“AO“ BAOC (Bar All Outgoing Calls)
“OI“ BOIC (Bar Outgoing International Calls)
“OX“ BOIC-exHC (Bar Outgoing International Calls except to Home Country)
“AI“ BAIC (Bar All Incoming Calls)
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“IR“ BIC-Roam (Bar Incoming Calls when Roaming outside the home country)
“AB“ All Barring services
“AG“ All outGoing barring services
“AC“ All inComing barring services
4...8 Length of password. The range of permitted length for a password depends on
the associated <facility>. It is available from the test command response,
or in the description of parameter <facility>.
Password specified for the facility.
Parameter <old password> can be ignored if no old password was allocated to the facility.
Take into account that a password may have already been set by factory, or that the service is subject to a pass-
word issued by the provider. See notes above or contact provider.
New password. Mandatory, if <old password> was an unblocking key (such as the Master Phone Code).
Note
• When changing PIN2 (<facility>="P2") it is recommended to check the new state of PIN2 by using the
AT+CPIN2 command.
Examples
EXAMPLE 1
To change PIN2
EXAMPLE 2
To set password used to enable or disable barring of all outgoing calls:
EXAMPLE 3
Handling of the "PS" lock password
<password length>(num)
<old password>(str)
<new password>(str)
AT+CPWD="P2","0000","8888"
(where "0000" = old PIN2 and "8888" = new PIN2)
OK
PIN2 Password has been changed to "8888"
AT+CPWD="AO","0000","3333"
Requests the network to change the password for
supplementary service "call barring".
OK
Usually this request will affect all barring services,
even though the request is issued for Supplementary
Service BAOC ("Barring of all outgoing calls") only.
Refer to the respective network provider for detail.
AT+CMEE=2
Enable text output of CME Error information
AT+CPWD="PS","1111","2222"
(where "1111" = old password and "2222" = new
password)
OK
Password for facility "PS" is now "2222"
AT+CPWD="PS","1111","2222"
Repeat command to provoke error "incorrect pass-
word"
+CME ERROR: incorrect password
("1111" is no longer the correct password)
MC55i AT Command Set
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EXAMPLE 4
To specify a new "PS" lock password, after the old password was disabled (e.g. after three failed attempts to
change the "PS" password): use the master phone code.
CAUTION: THIS TEST SHOULD BE PERFORMED ONLY IF THE CORRECT MASTER PHONE CODE FOR
THE INDIVIDUAL ME USED IS DEFINITELY AVAILABLE! Otherwise the module used will be rendered use-
less until the correct master phone code is entered!:
Alternatively, without giving a new password:
AT+CPWD="PS","12345678","1111"
where 12345678 is the Master Phone Code and
1111 is the new password. You may also use <new
password> to restore the former disabled pass-
word.
OK
AT+CPWD="PS","12345678"
(where 12345678 is the Master Phone Code). Deac-
tivates the present phone lock.
OK
MC55i AT Command Set
5.7 AT^SPWD s
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5.7 AT^SPWD Change Password
The AT^SPWD command provides the same functions as AT+CPWD. The major difference between both com-
mands is that, apart from the different prefixes "^SPWD" and "+CPWD", the AT^SPWD command includes addi-
tional functions dedicated to the Customer SIM Lock. Please note that this feature is only supported by
specifically pre-configured MC55i modules and, therefore, not part of the standard "MC55i AT Command Set".
Ordering information and a detailed description of the "Customer SIM Lock" feature can be requested from Sie-
mens. All other functions and parameters of AT^SPWD are described in Section 5.6, AT+CPWD.
Each password is a string of digits the length of which varies with the associated facility. The test command
returns a list of pairs which represent the available facilities and the maximum length of the associated password.
See also AT commands AT+CLCK and AT^SLCK for more detail on the various lock features.
Syntax
Note
• When changing the PIN2 (<facility>="P2") it is recommended to check the new state of PIN2 using the
AT+CPIN2 command.
Test Command
AT^SPWD=?
Response(s)
^SPWD:list of supported ( <facility>, <password length>)
OK
Write Command
AT^SPWD=<facility>, <old password>[, <new password>]
Response(s)
New password has been registered for the facility lock function.
OK
If parameter <old password> was not correct:
+CME ERROR 16 (+CME ERROR: incorrect password)
If the password for the selected <facility> has been invalidated due to too many failed attempts:
+CME ERROR ...
If error is related to ME functionality:
+CME ERROR
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
+ + + + + + - - -
MC55i AT Command Set
6. Identification Commands s
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6. Identification Commands
The AT Commands described in this chapter allow the external application to obtain various identification infor-
mation related to the MC55i and linked entities.
6.1 ATI Display product identification information
The ATI execute command delivers a product information text.
The 'Revision' information consists of the following parts: Version xx and variant yy of software release.
Syntax
Parameter Description
9 Command responds with "SIEMENS Gipsy Soft Protocolstack V2.550".
Exec Command
ATI
Response(s)
SIEMENS
MC55i
REVISION xx.yy
OK
Exec Command
ATI[<value>]
Response(s)
[SIEMENS Gipsy Soft Protocolstack V2.550]
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<value>(num)
MC55i AT Command Set
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6.2 AT+CGMI Request manufacturer identification
AT+CGMI returns a manufacturer identification text. See also: AT+GMI.
Syntax
6.3 AT+GMI Request manufacturer identification
AT+GMI returns a manufacturer identification text. See also: AT+CGMI.
Syntax
Test Command
AT+CGMI=?
Response(s)
OK
Exec Command
AT+CGMI
Response(s)
SIEMENS
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
Test Command
AT+GMI=?
Response(s)
OK
Exec Command
AT+GMI
Response(s)
SIEMENS
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
MC55i AT Command Set
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6.4 AT+CGMM Request model identification
AT+CGMM returns a product model identification text. Command is identical with AT+GMM.
Syntax
6.5 AT+GMM Request model identification
AT+GMM returns a product model identification text. Command is identical with AT+CGMM.
Syntax
Test Command
AT+CGMM=?
Response(s)
OK
Exec Command
AT+CGMM
Response(s)
MC55i
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
Test Command
AT+GMM=?
Response(s)
OK
Exec Command
AT+GMM
Response(s)
MC55i
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
MC55i AT Command Set
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6.6 AT+CGMR Request revision identification of software status
AT+CGMR delivers a product firmware version identification. Command is identical with AT+GMR.
Syntax
Parameter Description
Version xx and variant yy of software release.
6.7 AT+GMR Request revision identification of software status
AT+GMR delivers a product firmware version identification. Command is identical with AT+CGMR.
Syntax
Parameter Description
Version xx and variant yy of software release.
Test Command
AT+CGMR=?
Response(s)
OK
Exec Command
AT+CGMR
Response(s)
REVISION <xx.yy>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<xx.yy>(str)
Test Command
AT+GMR=?
Response(s)
OK
Exec Command
AT+GMR
Response(s)
REVISION <xx.yy>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<xx.yy>(text)
MC55i AT Command Set
6.8 AT+CGSN s
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6.8 AT+CGSN Request International Mobile Equipment Identity
(IMEI)
AT+CGSN delivers the International Mobile Equipment Identity (IMEI). Command is identical with: AT+GSN.
Syntax
Parameter Description
International Mobile Equipment Identity (IMEI) used to identify a GSM mobile equipment to the GSM network
6.9 AT+GSN Request International Mobile Equipment Identity (IMEI)
AT+GSN delivers the International Mobile Equipment Identity (IMEI). Command is identical with AT+CGSN
Syntax
Parameter Description
International Mobile Equipment Identity (IMEI) used to identify a GSM mobile equipment to the GSM network.
Test Command
AT+CGSN=?
Response(s)
OK
Exec Command
AT+CGSN
Response(s)
<sn>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<sn>(str)
Test Command
AT+GSN=?
Response(s)
OK
Exec Command
AT+GSN
Response(s)
<sn>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<sn>(str)
MC55i AT Command Set
6.10 AT+CIMI s
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6.10 AT+CIMI Request International Mobile Subscriber Identity (IMSI)
AT+CIMI delivers the International Mobile Subscriber Identity (IMSI). The IMSI permits the TE to identify the indi-
vidual SIM attached to the ME.
Syntax
Parameter Description
International Mobile Subscriber Identity (string without quotes).
Test Command
AT+CIMI=?
Response(s)
OK
Exec Command
AT+CIMI
Response(s)
<imsi>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<imsi>(str)
MC55i AT Command Set
7. Call related Commands s
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7. Call related Commands
The AT Commands described in this chapter are related to Mobile Originated (MOC, i.e. outgoing) Calls and
Mobile Terminated (MTC, i.e. incoming) Calls.
7.1 Call Status Information
For Circuit switched calls, including voice, fax and data calls, call status information is available with URC
"+CIEV: call" (configurable via AT commands AT+CIND and AT+CMER) or - in more detail - from the list of current
calls. This list can be displayed on request via at commands AT+CLCC and AT^SLCC. It can also be issued by
the ME in the form of an unsolicited result code "^SLCC" if configured with AT^SLCC and AT+CMER.
URC "+CIEV: call" and URC "^SLCC" can be configured using AT command AT^SCFG. An overview of the pos-
sible configurations and their consequences for the availability of call status information will be given here.
Generally speaking, the call status values recognized by the ME are as follows:
•active
•held
• dialing (MOC)
• alerting (MOC)
• incoming (MTC)
• waiting (MTC)
• terminating: The call is not active anymore, but inband information is still available.
• dropped: The call has been suspended by the network, but may be resumed later.
The values "terminating" and "dropped" are not standardized for AT command AT+CLCC, and therefore only
available for command AT^SLCC. A call in any of these two states will not appear in the list of current calls as
displayed with AT+CLCC.
A call that is not recognized by the ME is considered to be in "unknown" state.
Some networks may schedule a traffic channel for a call that is not yet in the "active" state. This is reflected in
parameter <traffic channel assigned> of AT command AT^SLCC and the corresponding URC.
Depending on the value of AT^SCFG setting <succ>, Indicator "+CIEV" will be issued (if configured with
AT+CIND and AT+CMER)
• when a state transition ends in state "active" or in state "unknown"
(if AT^SCFG setting <succ>=''restricted'').
• when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a traffic channel is established
(if AT^SCFG setting <succ>=''verbose'').
The indicator value for indicator "+CIEV: call" will be "1" if at least one call is in states "held" or "active", and "0"
otherwise.
Depending on the value of AT^SCFG setting <sucs>, Indicator "^SLCC" will be issued (if configured with write
command AT^SLCC and AT+CMER)
• when a state transition ends in state "active" or in state "unknown" (if AT^SCFG setting <sucs>="restricted")
• when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a voice channel is established (if AT^SCFG setting <sucs>="verbose").
Due to compatibility considerations, the powerup default for AT^SCFG setting <succ> is "restricted", offering
compatibility to the standard behaviour of indicator "+CIEV: call", while the default for setting <sucs> is "ver-
bose".
In order to see the URCs, event reporting for both indicators must be explicitly configured with the appropriate
AT commands.
MC55i AT Command Set
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7.2 ATA Answer a call
Syntax
Command Description
TA causes remote station to go off-hook (e.g. answer call).
Parameter Description
Connection status
output only if ATX parameter setting with value greater 0. Connection speed values:
“300“
“1200“
“2400“
“4800“
“9600“
“14400“
Notes
• Any additional commands on the same command line are ignored.
• The command may be aborted generally by receiving a character during execution. It can't be aborted in
some connection setup states, such as handshaking.
• If AT+FCLASS setting is 1 or 2, all incoming calls will be answered as fax calls, when ATA is issued on multi-
plexer channel 1 resp. ASC0. For calls explicitly signalled as voice or data calls, this procedure will fail with
result code "NO CARRIER", but the call in question will continue to ring.
It is possible to change the setting for AT+FCLASS to 0 while the call is ringing, and accept the call normally
afterwards with ATA.
• The ATA command may be used also to accept a network request for a PDP context activation (see ATA).
• See also ATX for <text>.
• If an incoming call is no longer available (already disconnected/hanged up)a "NO CARRIER" result code will
be given.
Exec Command
ATA
Response(s)
In case of data call, if successfully connected (TA switches to data mode):
CONNECT <text>
In case of voice call, if successfully connected:
OK
When TA returns to command mode after call release:
OK
If no connection:
NO CARRIER
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + + + + + - - -
<text>(str)
MC55i AT Command Set
7.3 ATD s
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7.3 ATD Mobile originated call to specified number
Syntax
Command Description
This command can be used to set up outgoing voice, data or fax calls. It also serves to control Supplementary
Services. The termination character ";" is mandatory to set up voice calls or to send *# codes for Supplementary
Services. It must not be used for data and fax calls.
Additional notes on the responses returned after dialing with ATD:
• For voice calls, you have the choice of two different response modes that can be selected with AT^SM20:
AT^SM20=1 (factory default) causes the ME to respond once the call setup is completed either successfully
("OK") or unsuccessfully ("NO CARRIER", "NO DIAL TONE", "BUSY").
AT^SM20=0 causes the ME to return "OK" immediately after dialing was completed (i.e. before call setup ter-
minates successfully or unsuccessfully).
• For data connections, call setup always terminates when the call has been established (indicated by the result
code "CONNECT <text>), or when it fails (indicated by "NO CARRIER"). The settings of AT^SM20 do not
apply.
Different call release indications:
• Upon termination, an outgoing fax or data call may show a different result code than a voice call would show
under identical conditions. In order to track down the actual reason for call termination, AT+CEER or ATS18
should be used for all applicable connections.
Using ATD during an active call:
• When a user originates a second voice call while there is already an active voice call, the first call will auto-
matically put on hold. The second call attempt is acknowledged with "OK" immediately after dialing with ATD
has completed, without relation to a successful call setup. In case of failure, the additional result codes "NO
CARRIER", "NO DIAL TONE", "NO CARRIER" will be presented afterwards (see example below).
Parameter Description
String of dialing digits and optional V.250 modifiers: 0-9, *, #, +, A, B, C
The following V.250 modifiers are ignored: ,(comma), T, P, !, W ,@
Exec Command
ATD<n>[<mgsm>][;]
Response(s)
If no dialtone (parameter setting ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If a connection cannot be set up:
NO CARRIER
OK
If successfully connected and non-voice call (TA switches to online data mode):
CONNECT <text>
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 ± + ± + ± ± - - -
<n>(text)
MC55i AT Command Set
7.3 ATD s
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String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called party)
i Deactivates CLIR (enables presentation of own phone number to called party)
G Activate Closed User Group explicit invocation for this call only.
g Deactivate Closed User Group explicit invocation for this call only.
Notes
• The command may be aborted generally when receiving a character during execution. It cannot be aborted
in some connection setup states, such as handshaking.
• Parameter "I" and "i" only if no *#-code is within the dial string.
•<mgsm> is not supported for data calls.
•<n> is default for last number that can be dialled by ATDL.
• See also ATX for <text>.
• If ATD is used with a USSD command (e.g. ATD*100#;) an AT+CUSD=1 is executed implicitly (see AT+CUSD).
• Parameter 'G' or 'g' will be ignored if Closed User Group was already activated, respectively deactivated with
AT+CCUG command before. Call by call invocation of CUG uses the settings provisioned by the provider or,
if available, the settings of the parameters <index> and <info> made with AT+CCUG.
• The ME is equipped with a "Blacklist" function according to GSM02.07 Annex A:
After a predefined number of failed call attempts, the dialed number is entered into a read-only phonebook
called "blacklist" (phonebook "BL"). Call attempts to numbers contained in the blacklist will be barred by ME
and not signalled to the network.
An attempt to start a voice call to a barred phone number will be stopped with a CME ERROR 257 "Call
Barred".
An attempt to start a data or fax call to a barred phone number will be answered immediately with result code
"NO CARRIER".
The barred numbers are automatically removed from the blacklist according to the timing conditions specified
in GSM02.07 Annex A.
• Emergency calls:
MC55i supports 112, 911 and 08 (standardized GSM emergency numbers, usable with or without SIM).
• When using the command on the second serial interface please see also Section 1.9.
Example
The following example shows the call setup procedure when a call is already active and a second call attempt
fails because the line of the called party is busy:
<mgsm>(str)
atd03012345678
Dialing out the first party's number.
OK
The first call is established.
ATD03022222222
The number of the second party is dialed.
OK
The response "OK" is issued immediately though no call is established
(same behavior as is you had chosen AT^SM20=0.)
BUSY
Line of the second called party is busy.
MC55i AT Command Set
7.4 ATD><mem><n> s
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7.4 ATD><mem><n> Mobile originated call using specific memory
and index number
Syntax
Command Description
TA attempts to set up an outgoing call to the specified number. The termination character ";" is mandatory since
dialing from a phonebook is only supported for voice calls and for sending *# codes of Supplementary Services
or other functions.
Parameter Description
Phonebook storage:
For detailed description of storages see AT+CPBS.
“FD“ Fixed dialing phonebook
“SM“ SIM phonebook
“ON“ MSISDN list
“ME“ Mobile Equipment Phonebook
“LD“ Last number dialed phonebook
“MC“ Missed (unanswered received) calls list
“RC“ Received calls list
“VM“ CPHS voice mailbox phonebook
Integer type memory location in the range of locations available in the selected memory, i.e. the index number
returned by AT+CPBR.
String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called party)
i Deactivates CLIR (enables presentation of own phone number to called party)
Exec Command
ATD><mem><n>[<mgsm>];
Response(s)
ERROR
+CME ERROR: <err>
If no dialtone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
When TA returns to command mode after call release:
OK
If successfully connected:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + ± + ± ± - - -
<mem>(str)
<n>(num)
<mgsm>(str)
MC55i AT Command Set
7.4 ATD><mem><n> s
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Notes
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• There is no <mem> for emergency call ("EN").
• The command is not applicable to data calls. Any attempt to dial a data call number from <mem> causes the
result code "NO CARRIER" to appear.
• Parameter <mgsm> only if no *# code is within the dialing string.
•See ATX for setting result code and call monitoring parameters.
Examples
EXAMPLE 1
To query the location number of the phonebook entry:
TA returns the entries available in the active phonebook.
EXAMPLE 2
To dial a number from the SIM phonebook, for example the number stored to location 15:
EXAMPLE 3
To dial a phone number stored in the last dial memory on the SIM card:
AT+CPBR=1,xx
ATD>"SM"15;
OK
ATD>"LD"9;
OK
MC55i AT Command Set
7.5 ATD><n> s
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7.5 ATD><n> Mobile originated call from active memory using index
number
Syntax
Command Description
TA attempts to set up an outgoing call to the stored number. The termination character ";" is mandatory since
dialing from a phonebook is only supported for voice calls and for sending *# codes of Supplementary Services
or other functions.
Parameter Description
Integer type memory location in the range of locations available in the selected memory, i.e. the index number
returned by AT+CPBR.
String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called party)
i Deactivates CLIR (enables presentation of own phone number to called party)
Notes
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• The command is not applicable to data calls. Any attempt to dial a data call number from <n> causes the
result code "NO CARRIER" to appear.
• Parameter <mgsm> only if no *# code is within the dialing string.
Exec Command
ATD><n>[<mgsm>];
Response(s)
ERROR
+CME ERROR: <err>
If no dialtone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
When TA returns to command mode after call release:
OK
If successfully connected:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + ± + ± ± - - -
<n>(num)
<mgsm>(str)
MC55i AT Command Set
7.6 ATD><str> s
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7.6 ATD><str> Mobile originated call from active memory using cor-
responding field
Syntax
Command Description
This command searches the active phonebook for a given string <str> and dials the assigned phone number.
The termination character ";" is mandatory since dialing from a phonebook is only supported for voice calls and
for sending *# codes of Supplementary Services or other functions.
Parameter Description
String type value ("x"), which should equal an alphanumeric field in at least one phonebook entry in the searched
memories; used character set should be the one selected with AT+CSCS. <str> can contain escape sequences
as described in chapter "Supported character sets".
<str> must be wrapped in quotation marks (""), if escape sequences or parameter <mgsm> are used or if the
alphanumeric strings contains a blank. If not, quotation marks are optional.
If AT+CSCS is set to "UCS2", with respect to the coding of UCS2-characters only phonebook entries that contain
an alphanumeric string with a size less than the half of the parameter <tlength> from AT+CPBW can be dialed.
String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called party)
i Deactivates CLIR (enables presentation of own phone number to called party)
Notes
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• The command is not applicable to data calls. Any attempt to dial <str> without semicolon ";" causes the
result code "NO CARRIER" to appear.
• Parameter <mgsm> only if no *# code is within the dialing string.
Exec Command
ATD><str>[<mgsm>];
Response(s)
ERROR
+CME ERROR: <err>
If no dialtone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
When TA returns to command mode after call release:
OK
If successfully connected:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + ± + ± ± - - -
<str>(str)(+CSCS)
<mgsm>(str)
MC55i AT Command Set
7.7 ATDI s
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7.7 ATDI Mobile originated call to ISDN number
Syntax
Command Description
TA attempts to set up an outgoing call to ISDN number. The termination character ";" is mandatory to set up voice
calls or to send *# codes for Supplementary Services. It must not be used for data and fax calls.
Parameter Description
ISDN number
String with maximum length of 20 characters. Allowed characters: +, 0-9, A, B, C.
Note
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
Exec Command
ATDI<n>[;]
Response(s)
If no dialtone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
All other error reasons:
+CME ERROR
If successfully connected and non-voice call (TA switches to data state):
CONNECT <text>
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + - + - - - - -
<n>(str)
MC55i AT Command Set
7.8 ATDL s
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7.8 ATDL Redial last number used
Syntax
Command Description
This command redials the last voice and data call number used in the ATD command. If terminated with semi-
colon ";" ATDL dials the last voice call number stored in the "LD" phonebook. Otherwise, the last dialed data or
fax number will be used (not contained in the "LD" phonebook).
Notes
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• Parameter "I" and "i" only if no *#-code is within the dial string.
Exec Command
ATDL[;]
Response(s)
If there is no last number or number is not valid:
+CME ERROR
If no dialtone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
If successfully connected and non-voice call (TA switches to online data mode):
CONNECT <text>
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 + + ± + ± ± - - -
MC55i AT Command Set
7.9 ATH s
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7.9 ATH Disconnect existing connection
Syntax
Command Description
Disconnect existing call from command line by local TE and terminate call.
Parameter Description
[0] disconnect from line and terminate call
Notes
• OK is issued after circuit 109 (DCD) is turned off, if it was previously on.
•ATH terminates every circuit switched call (voice, data or fax), even if it is issued via another interface. This
behavior is in accordance with ITU-T V.250; (07/97, "Hook control": "ATH is terminating any call in progress.").
•ATH clears any active PDP context or terminates any existing PPP connection, but only if issued on the same
interface where GPRS is used and if there is no pending network request for PDP context activation. It does
not affect PDP contexts and PPP connections on other interfaces (see also Chapter "ATH Manual rejection
of a network request for PDP context activation").
Exec Command
ATH[<n>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)
MC55i AT Command Set
7.10 AT+CHUP s
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7.10 AT+CHUP Hang up call
Syntax
Command Description
Cancels all active and held calls.
Note
•AT+CHUP implements the same function as ATH
Test Command
AT+CHUP=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT+CHUP
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
MC55i AT Command Set
7.11 ATS0 s
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7.11 ATS0 Set number of rings before automatically answering a call
Syntax
Parameter Description
000(&F) Automatic answer mode is disabled.
001-255 Enable automatic answering after specified number of rings.
Notes
• This command works for MT data and fax calls.
• Autoanswering of CSD data and fax calls is supported on ASC0/Mux1 only.
• A CSD call will not be automatically answered when the module is in GPRS online mode, but it is possible in
GPRS command mode. The application can detect a call by evaluating the RING line and determine whether
to change into GPRS command mode or stay in GPRS online mode until GPRS is available again. To answer,
to reject or to wait for automatically answering the incoming call the application has to switch into GPRS com-
mand mode.
• If <n> is set to higher values, the calling party may hang up before the call is automatically answered.
• The correlation between ATS7 and ATS0 is important.
Example: Call setup may fail if ATS7=30 and ATS0=20.
• Setting is local to the interface. It is allowed to have different settings on different interfaces. In such cases
the interface 'wins', which is idle and uses the smallest <n> value.
• The ATS0 write command is PIN protected.
• According to "3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)", ATS0 is also used
as GPRS compatibility command to answer automatically to a network request for PDP context activation
(see Section 11.19). Therefore, when the ATS0 write command is issued with <n> greater than 0, the ME will
attempt to perform a GPRS attach if not yet attached and if configured to do so (due to the setting
AT^SCFG="GPRS/ATS0/withAttach","on").
If the automatic GPRS attach fails the ME keeps trying to attach for approx. 5 minutes, before ATS0 ends up
with "ERROR" or "+CME ERROR: unknown", though the new <n> value takes effect. To avoid the risk of long
response times to ATS0 in such case take care that the parameter AT^SCFG=<gs0aa> is off, if autoanswer
mode is not needed for GPRS or if the mobile works in non-GPRS networks.
The GPRS attach will not be performed on recalling a stored user profile with ATZ or on powerup, even though
a value <n> greater than 0 was stored in the user profile with AT&W.
Read Command
ATS0?
Response(s)
<n>
OK
ERROR
Write Command
ATS0=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 ± + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
7.12 ATS6 s
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7.12 ATS6 Set pause before blind dialing
Syntax
Command Description
No effect for GSM.
Parameter Description
000(&F)...255
Read Command
ATS6?
Response(s)
<n>
OK
Write Command
ATS6=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
7.13 ATS7 s
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7.13 ATS7 Set number of seconds to wait for connection completion
ATS7 specifies the number of seconds the TA will wait for the completion of the call setup when answering or
originating a data call. Also referred to as "no answer timeout". To put it plainly, this is the time to wait for the
carrier signal. If no carrier signal is received within the specified time, the TA hangs up.
Syntax
Parameter Description
Number of seconds to wait for connection completion
000...060(&F)
Notes
•Command ATS7 is only applicable to data calls.
• Values greater than 60 cause no error, but <n> will be restored to the maximum value of 60.
• The correlation between ATS7 and ATS0 is important. If the called party has specified a high value for
ATS0=<n> call setup may fail.
Example: Call setup may fail if ATS7=30 and ATS0=20.
Read Command
ATS7?
Response(s)
<n>
OK
Write Command
ATS7=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
7.14 ATS8 s
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7.14 ATS8 Set number of seconds to wait for comma dialing modifier
This command specifies the amount of time, in seconds, that the DCE shall pause, during signalling of call
addressing information to the network (dialling), when a "," (comma) dial modifier is encountered in a dial string.
Syntax
Command Description
No effect for GSM.
Parameter Description
0(&F) DCE does not pause when "," encountered in dial string
1...255 Number of seconds to pause
Read Command
ATS8?
Response(s)
<n>
OK
Write Command
ATS8=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
7.15 ATS10 s
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7.15 ATS10 Set disconnect delay after indicating the absence of data
carrier
Syntax
Command Description
This parameter setting determines the amount of time, that the TA remains connected in absence of a data car-
rier. If the data carrier is detected before disconnect, the TA remains connected.
Parameter Description
number of tenths of seconds of delay
001...2(&F)...254
Read Command
ATS10?
Response(s)
<n>
OK
Write Command
ATS10=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
7.16 ATO s
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7.16 ATO Switch from command mode to data mode / PPP online
mode
Syntax
Command Description
ATO is the corresponding command to the +++ escape sequence: When you have established a CSD call or a
GPRS connection and TA is in command mode, ATO causes the TA to resume the data or GPRS connection and
takes you back to data mode or PPP online mode.
Parameter Description
[0] Switch from command mode to data mode
Exec Command
ATO[<n>]
Response(s)
If connection is not successfully resumed:
NO CARRIER
or
TA returns to data mode from command mode
CONNECT <text>
Note: <text> output only if ATX parameter setting with value > 0.
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + ± + - - - - -
<n>(num)
MC55i AT Command Set
7.17 +++ s
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7.17 +++ Switch from data mode to command mode
Syntax
Command Description
This command is only available during a CSD call or a GPRS connection. The +++ character sequence causes
the TA to cancel the data flow over the AT interface and switch to command mode. This allows you to enter AT
commands while maintaining the data connection to the remote device or, accordingly, the GPRS connection.
To prevent the +++ escape sequence from being misinterpreted as data, it must be preceded and followed by a
pause of at least 1000 ms. The +++ characters must be entered in quick succession, all within 1000 ms.
Notes
• To return from command mode to data or PPP online mode: Enter ATO.
• In Multiplex mode the +++ sequence does not work. Therefore, if required in Multiplex mode, the escape
sequence needs to be implemented in the customer's external Multiplex application. Design solutions, for
example using the DTR signal or a modem status command (MSC), can be found in [5], Section "Escape
Sequence". See also Section 4.8, AT+CMUX.
• On ASC1 the +++ sequence can be used in GPRS connections for switching from PPP online to command
mode.
Exec Command
+++
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + ± - - - - - -
MC55i AT Command Set
7.18 AT+CBST s
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7.18 AT+CBST Select bearer service type
The AT+CBST write command selects the bearer service <name>, the data rate <speed> and the connection
element <ce> to be used when data calls are originated. The settings also apply to mobile terminated data calls,
especially when single numbering scheme calls or calls from analog devices are received (see AT+CSNS). See
GSM 02.02[1] for a list of allowed combinations of subparameters.
Syntax
Parameter Description
0 Autobauding
4 2400 bps (V.22bis)
6 4800 bps (V.32)
[7](&F) 9600 bps (V.32)
14 14400 bps (V.34)
68 2400 bps (V.110)
70 4800 bps (V.110)
71 9600 bps (V.110)
75 14400 bps (V.110)
0(&F) Asynchronous modem
Transparent mode is not supported.
1(&F) Non-transparent
Test Command
AT+CBST=?
Response(s)
+CBST: (list of supported<speed>s), (list of supported<name>s), (list of supported<ce>s)
OK
Read Command
AT+CBST?
Response(s)
+CBST: <speed>, <name>, <ce>
OK
Write Command
AT+CBST=<speed>[, <name>[, <ce>]]
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + - + - - - - -
<speed>(num)(&W)(&V)
<name>(num)(&W)
<ce>(num)(&W)
MC55i AT Command Set
7.19 AT+CRLP s
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7.19 AT+CRLP Select radio link protocol parameters for originated
non-transparent data calls
The AT+CRLP write command sets radio link protocol (RLP) parameters used when non-transparent data calls
are originated. The read command returns the current settings for the supported RLP version 0.
Syntax
Parameter Description
Interworking window size (IWF to MS)
0...61(&F)
Mobile window size (MS to IWF)
0...61(&F)
Acknowledgement timer (T1 in 10 ms units)
48...[78](&F)...255
Re-transmission attempts N2
1...6(&F)...255
Test Command
AT+CRLP=?
Response(s)
+CRLP: (list of supported<iws>s), (list of supported<mws>s), (list of supported<T1>s), (list of
supported<N2>s)
OK
Read Command
AT+CRLP?
Response(s)
+CRLP: <iws>, <mws>, <T1>, <N2>
OK
Write Command
AT+CRLP=[<iws>[, <mws>[, <T1>[, <N2>]]]]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + - + - - - - -
<iws>(num)(&W)(&V)
<mws>(num)(&W)(&V)
<T1>(num)(&W)(&V)
<N2>(num)(&W)(&V)
MC55i AT Command Set
7.20 AT+CLCC s
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7.20 AT+CLCC List of current calls
The execute command lists all current calls. If the command is successful, but no calls are available, no infor-
mation response is sent to TE.
Syntax
Parameter Description
Call identification number as described in GSM02.30 subclause 4.5.5.1; this number can be used in AT+CHLD
command operations
0 Mobile originated call (MOC)
1 Mobile terminated call (MTC)
State of the call
0 Active
1Held
2 Dialing (MOC)
3 Alerting (MOC)
4 Incoming (MTC)
5 Waiting (MTC)
Bearer/teleservice
0Voice
1Data
2Fax
Test Command
AT+CLCC=?
Response(s)
OK
Exec Command
AT+CLCC
Response(s)
[+CLCC: <idx>, <dir>, <stat>, <mode>, <mpty>[, <number>, <type>[, <alpha>]]]
[+CLCC: <idx>, <dir>, <stat>, <mode>, <mpty>[, <number>, <type>[, <alpha>]]]
[+CLCC: ...]
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<idx>(num)
<dir>(num)
<stat>(num)
<mode>(num)
MC55i AT Command Set
7.20 AT+CLCC s
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3 Voice followed by data, voice mode (only in connection with single numbering
scheme AT+CSNS)
4 Alternating voice/data, voice mode (only in connection with single numbering
scheme AT+CSNS)
5 Alternating voice/fax, voice mode (only in connection with single numbering
scheme AT+CSNS)
6 Voice followed by data, data mode (only in connection with single numbering
scheme AT+CSNS)
7 Alternating voice/data, data mode (only in connection with single numbering
scheme AT+CSNS)
8 Alternating voice/fax, fax mode (only in connection with single numbering
scheme AT+CSNS)
9 Unknown
0 Call is not one of multiparty (conference) call parties
1 Call is one of multiparty (conference) call parties
Phone number in format specified by <type>
Type of address octect
145 Dialing string <number> includes international access code character '+'
128 number is restricted
129 Otherwise
Alphanumeric representation of <number> corresponding to the entry found in phonebook.
The maximum displayed length of <alpha> is 16 characters. If <alpha> has more than 16 characters, only the
first 15 characters are displayed. To indicate an overflow, a special character will be used as the 16th character.
This is a space if the character set selected with AT+CSCS is 'GSM', or 'E400' if the character set is 'UCS2'.
Due to time constraints on the necessary evaluation of the phonebook, this parameter may show a default value
in early call phases (e.g. for <stat>= ''dialing'', ''incoming'' or ''alerting''), even if a phonebook entry is present
for the number concerned.
Note
• Teleservices other than voice, data, fax are not fully supported by ME. They are used only in connection with
the handling for AT+CSNS, and may therefore occur in parameter <mode> for mobile terminated calls.
<mpty>(num)
<number>(str)
<type>(num)
<alpha>(str)(+CSCS)
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7.21 AT^SLCC Extended list of current calls
AT^SLCC covers essentially the same information as GSM 07.07 command AT+CLCC, with the following exten-
sions:
• The execute command response contains the additional parameter <traffic channel assigned> which
indicates whether the call has been assigned a traffic channel by the network and transmission of DTMF
tones, data or inband information is possible.
• The additional write command allows to activate Event reporting for the list of current calls. If event reporting
is active for an interface, a call status transition (cf. Call Status Information) and (if desired) the
assignment of a traffic channel will generate an event report indication to this interface. In order to receive
this event report as an URC, the URC presentation mode for this interface has to be configured with
AT+CMER. Interface settings are saved with AT&W and can be displayed with AT&V
The frequency of event report generation can be configured with AT command AT^SCFG. Refer to Call
Status Information for further detail on the configuration options.
• The additional read command returns an indication whether event reporting is active for the current interface.
Mind that the URC will be displayed only if the URC presentation mode for the interface concerned has been
configured with AT+CMER.
• The exec command returns, like AT+CLCC, a list of current calls. If the command is successful, but no calls
are available, no information response is sent to the TE.
Syntax
Test Command
AT^SLCC=?
Response(s)
^SLCC: (list of supported<n>s)
OK
Read Command
AT^SLCC?
Response(s)
^SLCC: <n>
OK
Exec Command
AT^SLCC
Response(s)
[^SLCC:<idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[, <number>,
<type>[, <alpha>]]]
[^SLCC:<idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[, <number>,
<type>[, <alpha>]]]
[^SLCC:...]
OK
ERROR
+CME ERROR
Write Command
AT^SLCC=[<n>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
Siemens + + + + + + - - -
MC55i AT Command Set
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Unsolicited Result Code
Unsolicited Call Status information
if the list of current calls is empty:
^SLCC:
if one or more calls are currently in the list:
^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[,
<number>, <type>[, <alpha>]]
[^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel assigned>[,
<number>, <type>[, <alpha>]]]
[... ]
^SLCC:
URC "^SLCC" displays the list of current calls as displayed with the execute command AT^SLCC. The list is dis-
played in the state it has at the time of display, not in the state it had when the signal was generated.
The URC's occurrence indicates call status changes for any of the calls in the list of current calls.
Please refer to Call Status Information and AT^SCFG for further information about the configuration of
this URC.
Event reporting can be enabled separately for each interface. Interface settings are saved with AT&W and can be
displayed with AT&V. Additionally, The URC presentation mode for the interface must be configured with
AT+CMER.
Depending on the value of AT^SCFG setting <sucs>, Indicator "^SLCC" will be issued (if configured with write
command AT^SLCC and AT+CMER)
• when a state transition ends in state "active" or in state "unknown" (if AT^SCFG setting <sucs>="restricted")
• when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a traffic channel is established (if AT^SCFG setting <sucs>="verbose").
If multiple displays of identical list configurations occur, this happens because of short intermediate states of the
list, that have already been overridden by new transitions and states. Thus, it is guaranteed that the configuration
displayed is always the current configuration at the time of the last display.
The list of active calls displayed with this URC will always be terminated with an empty line preceded by prefix
"^SLCC: ", in order to indicate the end of the list.
Parameter Description
[0](&F) Presentation of URC "^SLCC" disabled
1 Presentation of URC "^SLCC" enabled
Call identification number as described in GSM02.30 subclause 4.5.5.1; this number can be used in AT+CHLD
command operations.
0 Mobile originated call (MOC)
1 Mobile terminated call (MTC)
state of the call
0 Active
1Held
2 Dialing (MOC)
3 Alerting (MOC)
4 Incoming (MTC)
<n>(num)(&W)(&V)
<idx>(num)
<dir>(num)
<stat>(num)
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5 Waiting (MTC)
6 Terminating: The call is not active anymore, but inband information is still avail-
able.
7 Dropped: The call has been suspended by the network, but may be resumed
later.
bearer/teleservice
0Voice
1Data
2Fax
3 Voice followed by data, voice mode (only in connection with single numbering
scheme AT+CSNS)
4 Alternating voice/data, voice mode (only in connection with single numbering
scheme AT+CSNS)
5 Alternating voice/fax, voice mode (only in connection with single numbering
scheme AT+CSNS)
6 Voice followed by data, data mode (only in connection with single numbering
scheme AT+CSNS)
7 Alternating voice/data, data mode (only in connection with single numbering
scheme AT+CSNS)
8 Alternating voice/fax, fax mode (only in connection with single numbering
scheme AT+CSNS)
9 Unknown
0 Call is not one of multiparty (conference) call parties
1 Call is one of multiparty (conference) call parties
0 No traffic channel assigned. Transmission of DTMF tones not possible.
1 Traffic channel is assigned and the progress indicator IE has been received
(call setup) or a voice connection has an active state. The parameter indicates
that the audio path is activated. DTMF tones can be sent with AT+VTS.
Phone number in format specified by <type>
Type of address octect
145 Dialing string <number> includes international access code character '+'
128 number is restricted
129 Otherwise
<mode>(num)
<mpty>(num)
<traffic channel assigned>(num)
<number>(str)
<type>(num)
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Alphanumeric representation of <number> corresponding to the entry found in phonebook.
The maximum displayed length of <alpha> is 16 characters. If <alpha> has more than 16 characters, only the
first 15 characters will be displayed. To indicate an overflow, a special character will be used as the 16th char-
acter. This will be a space if the character set selected with AT+CSCS is 'GSM', or 'E400' if the character set is
'UCS2'.
Due to time constraints on the necessary evaluation of the phonebook, this parameter may show a default value
during early call phases (e.g. for <stat>= "dialing", "incoming" or "alerting"), even if a phonebook entry is
present for the number concerned.
Notes
• Teleservices other than voice, data, fax are not fully supported by ME. They are used only in connection with
the handling for AT+CSNS, and may therefore occur in parameter <mode> for mobile terminated calls.
• If a URC "^SLCC" in verbose mode (see AT^SCFG) has been buffered while the interface was in dedicated
mode (depending on the settings of AT+CMER parameter <bfr>), each buffered event indicator will be output
as a separate URC after the interface returns to idle mode.
However, the output will deliver the list of current calls in the "current" state (at the time when the output is
generated), possibly leading to multiple displays of identical list configurations.
• Some parameters of the AT+CHLD command, as well as some situations where the call status in the network
changes very quickly (e.g. the transition between <stat>= "unknown", "dialing" and "alerting" for a call to a
reachable subscriber within the registered network) may lead to quasi-simultaneous changes to the states of
one or several calls in the list, possibly leading to multiple displays of identical list configurations.
• If multiple displays of identical list configurations occur, this happens because of intermediate states of the
list, that have already been overridden by new transitions and states. Thus, it is guaranteed that the configu-
ration displayed in such cases is the current configuration at the time of the last display.
• It is adviseable to receive URC "^SLCC" on an interface that is not used for call initiation, if verbose output is
configured. If only voice calls are expected, a setting of AT^SM20= 0 may be used alternatively in order to
keep the call from blocking the interface.
Examples
EXAMPLE 1
<alpha>(str)(+CSCS)
^SYSSTART
at+cpin=9999
OK
+CREG: 2
+CREG: 1,"0145","0016"
We are now registered.
at^sm20=0
Command ATD for an outgoing voice call will termi-
nate immediately with response "OK".
OK
atd"1234567";
We start a voice call.
OK
"OK" response is issued immediately because of set-
ting AT^SM20="0".
^SLCC: 1,0,2,0,0,0,"1234567",129,"Called
Party"
MO voice call starts, paging B-party.
^SLCC:
End of current list
^SLCC: 1,0,2,0,0,1,"1234567",129,"Called
Party"
Traffic channel established,
network may now transmit network announcements,
ME may now transmit DTMF tones.
^SLCC:
End of current list
^SLCC: 1,0,3,0,0,1,"1234567",129,"Called
Party"
Call is now ringing at B-Party.
^SLCC:
End of current list
MC55i AT Command Set
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EXAMPLE 2
^SLCC: 1,0,0,0,0,1,"1234567",129,"Called
Party"
B-Party has accepted the call, connection estab-
lished.
^SLCC:
End of current list.
atd23456;
We start a second voice call.
OK
"OK" response is issued immediately because
another call is already active (cf. ATD).
^SLCC: 1,0,1,0,0,0,"1234567",129,"Called
Party"
The active call is automatically put on hold, triggering
the display of the list.
^SLCC: 2,0,2,0,0,1,"23456",129
The second call has already started before the indi-
cation for the held call could be displayed
^SLCC:
End of current list.
^SLCC: 1,0,1,0,0,0,"1234567",129,"Called
Party"
The identical list is displayed again, triggered by the
start of the second voice call.
^SLCC: 2,0,2,0,0,1,"23456",129
The status of the second list entry has already been
displayed with the previous URC.
^SLCC:
End of current list.
^SLCC: 1,0,1,0,0,0,"1234567",129,"Called
Party"
The held call doesn't change status right now.
^SLCC: 2,0,3,0,0,1,"23456",129
The second call is now alerting the B-Party.
^SLCC:
End of current list.
^SLCC: 1,0,0,0,0,1,"1234567",129,"Called
Party"
The held call doesn't change status right now.
^SLCC:
End of current list: the B-Party of the second call has
not accepted the call in time, the second call has
ended.
NO CARRIER
The second call has ended.
^SLCC:
list is now empty: B-Party has ended the first call.
NO CARRIER
The first call has ended.
^SLCC: 1,1,4,0,0,1,"1234567",129
Incoming voice call is signalled.
Display is triggered by the incoming call, but the cur-
rent status of the call at the time of display already
comprises an active traffic channel.
^SLCC:
End of current list.
RING
Incoming call is signalled.
^SLCC: 1,1,4,0,0,1,"1234567",129
The incoming call had a traffic channel assigned
from the start.
This second identical display is triggered by the traf-
fic channel assignment.
Since the traffic channel was already indicated in the
previous URC, both instances of the URC contain
identical information.
^SLCC:
End of current list.
RING
Incoming call is signalled.
ata
Incoming call is accepted.
OK
call is established.
^SLCC: 1,1,0,0,0,1,"1234567",129
The call is now active.
^SLCC:
End of current list.
ath
Hang up the call.
OK
hang up complete.
^SLCC:
The list of current calls is empty again.
MC55i AT Command Set
7.22 AT+CR s
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7.22 AT+CR Service reporting control
AT+CR configures the TA whether or not to transmit an intermediate result code +CR: <serv> to the TE when a
call is being set up.
Setting the value of <mode> to 1 may lead to connection failure, if the application (e.g. WinFax) waits for default
result code/URC.
Syntax
Intermediate Result Code
If enabled, an intermediate result code is transmitted during connect negotiation when the TA has determined
the speed and quality of service to be used, before any error control or data compression reports are transmitted,
and before any final result code (e.g. CONNECT) appears.
+CR: <serv>
Parameter Description
0(&F) Disable
1 Enable
“REL ASYNC“ Asynchronous non-transparent
“GPRS“ GPRS
Test Command
AT+CR=?
Response(s)
+CR: (list of supported<mode>s)
OK
ERROR
Read Command
AT+CR?
Response(s)
+CR: <mode>
OK
ERROR
Write Command
AT+CR=<mode>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<mode>(num)(&W)(&V)
<serv>(str)
MC55i AT Command Set
7.23 AT+CRC s
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7.23 AT+CRC Set Cellular Result Codes for incoming call indication
The AT+CRC command controls whether or not to use the extended format of incoming call indication.
<mode>=1 may lead to connection failure, if the application (e.g. WinFax) waits for the default URC.
Syntax
Unsolicited Result Codes
URC 1
RING
Indicates incoming call to the TE if <mode>=0.
URC 2
+CRING: <type>
Indicates incoming call to the TE if <mode>=1.
Parameter Description
[0](&F) Disable extended format
1 Enable extended format
“REL ASYNC“ Asynchronous non-transparent
“FAX“ Facsimile
“VOICE“ Voice
“GPRS“ <PDP_type>, <PDP_addr> [,[<L2P>][,<APN>]] GPRS network request for
PDP context activation
Test Command
AT+CRC=?
Response(s)
+CRC: (list of supported<mode>s)
OK
ERROR
Read Command
AT+CRC?
Response(s)
+CRC: <mode>
OK
ERROR
Write Command
AT+CRC=[<mode>]
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<mode>(num)(&W)(&V)
<type>(str)
MC55i AT Command Set
7.24 AT+CSNS s
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7.24 AT+CSNS Single Numbering Scheme
The AT+CSNS command enables the ME to accept incoming calls when no bearer capability information is pro-
vided with the call, e.g. single numbering scheme calls or calls originating from analog devices.
Syntax
Parameter Description
[0](D) Voice: Each call received without bearer element is assumed to be speech
2 Fax: Each call received without bearer element is assumed to be an incoming
fax.
4 Data: Each call received without bearer element is assumed to be a data call.
Please take into account that the bearer service parameters set with AT+CBST
apply to all data calls including those received without bearer capability.
Notes
• The command must be set before the call comes. By default, when you do not modify the settings, all calls
received without bearer element are assumed to be voice.
• The setting will be saved when you power down the ME with AT^SMSO, provided that PIN authentication has
been done. The saved value will be restored when the same SIM card is inserted and PIN authentication done
again. If no SIM card or a different SIM card is inserted the default value 0 takes effect.
Test Command
AT+CSNS=?
Response(s)
+CSNS: (list of supported<mode>s)
OK
Read Command
AT+CSNS?
Response(s)
+CSNS: <mode>
OK
Write Command
AT+CSNS=[<mode>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<mode>(num)
MC55i AT Command Set
7.25 AT^SCNI s
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7.25 AT^SCNI List Call Number Information
Syntax
Command Description
TA returns a list of current calls of ME.
Parameter Description
call identification number as described in GSM 02.30[19] subclause 4.5.5.1; this number can be used in
AT+CHLD command operations
1...7
Call status of respective call number (first parameter)
0 call hold
1 call in progress
2 waiting call
string type phone number in format specified by <type>
type of address octet in integer format; 145 when dialling string includes international access code character "+",
128 when number is restricted otherwise 129
Note
• See also GSM 07.07: AT+CLCC
Test Command
AT^SCNI=?
Response(s)
OK
Exec Command
AT^SCNI
Response(s)
^SCNI: <id>1[,<cs>[,<number>,<type>]]
^SCNI: <id>2[,<cs>[,<number>,<type>]]
[...]
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<id>(num)
<cs>(num)
<number>(str)
<type>(num)
MC55i AT Command Set
7.26 AT^SLCD s
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7.26 AT^SLCD Display Last Call Duration
Syntax
Command Description
TA returns last call duration or current call duration.
Parameter Description
Format is "hh:mm:ss", where characters indicate hours, minutes, seconds; E.g. 22:10:00 "22:10:00"
Max value is 9999:59:59
Note
• The proper working of that command is network dependant.
Test Command
AT^SLCD=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT^SLCD
Response(s)
^SLCD: <time>
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<time>(str)
MC55i AT Command Set
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7.27 AT^STCD Display Total Call Duration
Syntax
Command Description
TA returns total call duration (accumulated duration of all calls).
Parameter Description
Format is "hh:mm:ss", where characters indicate hours, minutes, seconds; E.g. 22:10:00 "22:10:00"
Max value is 9999:59:59
Notes
• The Total Call Duration will not be reset by power off or other means.
• The proper working of that command is network dependant and only for MO calls.
Test Command
AT^STCD=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT^STCD
Response(s)
^STCD: <time>
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<time>(str)
MC55i AT Command Set
7.28 ATP s
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7.28 ATP Select pulse dialing
Syntax
Note
• No effect for GSM.
7.29 ATT Select tone dialing
Syntax
Note
• No effect for GSM.
Exec Command
ATP
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
Exec Command
ATT
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
MC55i AT Command Set
7.30 ATS2 s
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7.30 ATS2 Set escape sequence character
The ATS2=43 is implemented for V.250ter compatibility reasons only, and has no effect.
Syntax
Parameter Description
43 The data value
Read Command
ATS2?
Response(s)
<n>
OK
Write Command
ATS2=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)
MC55i AT Command Set
8. Network Service Commands s
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8. Network Service Commands
The AT Commands described in this chapter are related to various network services. More commands related
to this area can be found in Chapter 9., Supplementary Service Commands.
8.1 AT+COPN Read operator names
The AT+COPN command returns the list of operator names from the ME. Each operator code <numericn> that
has an alphanumeric equivalent <alphan> in the ME memory is returned. See also: AT^SPLM.
Syntax
Parameter Description
Operator in numeric format; GSM location area identification number.
Operator in long alphanumeric format; can contain up to 16 characters.
Test Command
AT+COPN=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT+COPN
Response(s)
+COPN: <numericn>, <alphan>
+COPN: ...
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<numericn>(str)
<alphan>(str)
MC55i AT Command Set
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8.2 AT+COPS Operator Selection
AT+COPS queries the present status of the MC55i's network registration and allows to determine whether auto-
matic or manual network selection shall be used. Additional service is available with AT^SOPS.
Three operator selection modes are available:
• Automatic
MC55i searches for the home operator automatically. If successful the MC55i registers to the home network.
If the home network is not found, MC55i goes on searching. If a permitted operator is found, MC55i registers
to this operator.
If no operator is found the MC55i remains unregistered.
• Manual
Desired operator can be determined using the AT+COPS write command. If the operator is found, MC55i reg-
isters to it immediately. If the selected operator is forbidden, the MC55i remains unregistered.
• Manual/automatic
The ME first tries to find the operator determined via AT+COPS write command. If the ME fails to register to
this operator, then it starts to select another (permitted) operator automatically.
The AT+COPS test command conists of several parameter sets, each representing an operator present in the
network.
Each set contains the following information:
• an integer indicating the availability of the operator,
• long alphanumeric format of the operator's name and
• numeric format representation of the operator.
Any of the parameters may be unavailable and will then be an empty field (,,). The list of operators comes in the
following order: Home network, networks referenced in SIM and other networks.
The operator list is followed by a list of the supported <mode>s and <format>s. These lists are delimited from
the operator list by two commas.
If the test command is used during an ongoing GPRS transfer, traffic will be interrupted for up to one minute.
The AT+COPS read command returns the current <mode> and the currently selected operator. If no operator is
selected, <format> and <oper> are omitted.
The AT+COPS write command forces an attempt to select and register to the GSM network operator (see note
below). If the selected operator is not available, no other operator will be selected (except <mode>=4). The
selected operator name <format> will apply to further read commands, too.
Command settings are effective over all serial interfaces of the MC55i.
Syntax
Test Command
AT+COPS=?
Response(s)
+COPS: [list of present operators (<opStatus>, long alphanumeric <oper>s,,numeric <oper>s ], , (list of
supported <mode>s), (list of supported <format>s)
OK
ERROR
+CME ERROR: <err>
Read Command
AT+COPS?
Response(s)
+COPS:<mode>[, <format>[, <oper>]]
OK
ERROR
+CME ERROR: <err>
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Parameter Description
Status
0 Unknown
1 Operator available
2 Current operator
3 Operator forbidden
Operator
If test command: Operator name in long alphanumeric format and numeric format.
If read command: Operator name as per <format>.
If write command: Operator name in numeric format.
Parameter values 0 and 1 are stored non-volatile in the MC55i.
0(D) Automatic mode; <oper> field is ignored.
1 Manual operator selection
Write command requires <oper> in numeric format, i.e. <format> shall be 2.
Read command returns the current <mode> and the currently selected
<oper>. If no operator is selected, <format> and <oper> are omitted.
2 Manually deregister from network and remain unregistered until <mode>=0 or
1 or 4 is selected.
3 Set only <format> (for AT+COPS read command).
4 Automatic / manual selection; if manual selection fails, automatic mode
(<mode>=0) is entered (<oper> field will be present).
0(&F) Long alphanumeric format of <oper>. Can be up to 16 characters long.
2 Numeric format of <oper>. This is the GSM Location Area Identification (LAI)
number, which consists of the 3-digit Mobile Country Code (MCC) plus the 2-
or 3-digit Mobile Network Code (MNC).
Write Command
AT+COPS=<mode>[, <format>[, <oper>]]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 ± + + + + + - - -
<opStatus>(num)
<oper>(str)
<mode>(num)(&V)
<format>(num)(&W)(&V)
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Note
• It is not recommended to use the AT+COPS command before passing the CHV (card holder verification) / SIM
PIN1 verification. This is because after PIN1 verification the module will automatically try to register to the
network as though AT+COPS were 0, regardless of the settings done before with or without SIM, such as
AT+COPS=2 which remains unchanged. Also, the test command should only be used after PIN1 authentica-
tion.
MC55i AT Command Set
8.3 AT^SOPS s
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8.3 AT^SOPS Extended Operator Selection
AT^SOPS queries the present status of the MC55i's network registration. Since basic operator selection services
are available with AT+COPS this command uses the methods of the Enhanced Operator Name String (EONS)
specification while handling operator name strings. Additional EONS related information is available with
AT^SIND.
AT^SOPS test command lists sets of five parameters, each representing an operator present in the network.
A set consists of
1. an integer indicating the availability of the operator,
2. specification of the source of the operator name <eonsOperator>,
3. operator name according to EONS Table,
4. Service Provider Name from the SIM Service Table and
5. numeric format representation of the operator.
Any of the parameters may be unavailable and will then be an empty field (,,).
The list of operators comes in the following order: Home network, networks referenced in SIM and other net-
works.
After the operator list the MC55i returns lists of supported <mode>s and <format>s. These lists are delimited
from the operator list by two commas.
If the test command is used while an ongoing GPRS transfer, traffic will be interrupted for up to one minute.
Command settings are effective over all serial interfaces of the MC55i.
Syntax
Parameter Description
Status
0 unknown
1 operator available
2 current operator
3 operator forbidden
Specification of the source of the operator name <eonsOperator>. Details of EONS-supplied operator name
types are available at AT^SIND.
Test Command
AT^SOPS=?
Response(s)
^SOPS:[list of present operator( <opStatus>, <eonsType>, <eonsOperator>, <servProvider>,
<opName>)s ], , (list of supported <mode>)s, (list of supported <format>)s
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<opStatus>(num)
<eonsType>(num)
MC55i AT Command Set
8.3 AT^SOPS s
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Operator name; format depends on the source of the operator name, specified by <eonsType>.
Service Provider Name according to setting of Service No. 17 in the SIM Service Table (EFSST).
Operator
Operator name in numerical presentation contains the GSM Location Area Identification (LAI) number, which
consists of the 3-digit Mobile Country Code (MCC) plus the 2- or 3-digit Mobile Network Code (MNC).
Parameter is stored non-volatile to the SIM.
Parameter is not applicable.
Parameter is not applicable.
Note
•The AT^SOPS Test command is only accepted by the module after a valid pin has been entered.
<eonsOperator>
<servProvider>(str)
<opName>
<mode>(num)
<format>(num)
MC55i AT Command Set
8.4 AT+CREG s
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8.4 AT+CREG Network registration
The AT+CREG command serves to verify the network registration status of the ME. For this purpose two types of
URCs are available.
The AT+CREG read command returns the URC presentation mode <n> and an integer <stat> that shows the
registration status of the ME. The location information elements <lac> and <ci> are returned only when <n>=2
and ME is registered to the network.
Syntax
Unsolicited Result Codes
URC 1
If <n>=1 and there is a change in the ME network registration status:
+CREG: <stat>
URC 2
If <n>=2 and there is a change in the ME network registration status or a change of the network cell:
+CREG: <stat>[, <lac>, <ci>]
Parameter Description
[0](&F) Disable +CREG URC
1 Enable URC +CREG:<stat> to report status of network registration
2 Enable URC +CREG:<stat>[,<lac>,<ci>] to report status of network regis-
tration including location information. Optional parameters <lac> and <ci>
will not be displayed during calls or if these values have not changed since last
AT+CREG read command or since last indication by +CREG URC.
Test Command
AT+CREG=?
Response(s)
+CREG: (list of supported<n>s)
OK
Read Command
AT+CREG?
Response(s)
+CREG: <n>, <stat>[, <lac>, <ci>]
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CREG=[<n>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
8.4 AT+CREG s
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0 Not registered, ME is currently not searching for new operator
There is a technical problem. User intervention is required. Yet, emergency
calls can be made if any network is available. Probable causes:
• no SIM card available
• no PIN entered
• no valid Home PLMN entry found on the SIM
1 Registered to home network
2 Not registered, but ME is currently searching for a new operator
The ME searches for an available network. Failure to log in until after more than
a minute may be due to one of the following reasons:
• No network available or insufficient Rx level.
• The ME has no access rights to the networks available.
• Networks from the SIM list of allowed networks are around, but login fails
due to one of the following reasons:
- #11 ... PLMN not allowed
- #12 ... Location area not allowed
- #13 ... Roaming not allowed in this location area
After this, the search will be resumed (if automatic network search is
enabled).
• The Home PLMN or an allowed PLMN is available, but login is rejected by
the cell (reasons: Access Class or LAC).
If at least one network is available, emergency calls can be made.
3 Registration denied
• If automatic network search is enabled:
Authentication or registration fails after Location Update Reject due to one
of the following reasons:
- #2 ... IMSI unknown at HLR
- #3 ... Illegal MS
- #6 ... Illegal ME
Either the SIM or the MS or the ME are unable to log into any network. User
intervention is required. Emergency calls can be made, if any network is
available.
• Only if manual network search is enabled:
Manual registration fails after Location Update Reject due to the following
reasons:
- #2 ... IMSI unknown at HLR
- #3 ... Illegal MS
- #6 ... Illegal ME
- #11 ... PLMN not allowed
- #12 ... Location area not allowed
- #13 ... Roaming not allowed in this location area
No further attempt is made to search or log into a network. Emergency calls
can be made if any network is available.
4 Unknown (not used)
5 Registered, roaming
The ME is registered at a foreign network (national or international network)
<stat>(num)(&V)
MC55i AT Command Set
8.4 AT+CREG s
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Two byte location area code in hexadecimal format (e.g. "00C3" equals 193 in decimal).
Two byte cell ID in hexadecimal format.
Example
<lac>(str)
<ci>(str)
AT+CREG=2
Activates extended URC mode.
OK
AT+COPS=0
Forces ME to automatically search network operator.
OK
+CREG: 2
URC reports that ME is currently searching.
+CREG: 1,"0145","291A"
URC reports that operator has been found.
MC55i AT Command Set
8.5 AT+CSQ s
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8.5 AT+CSQ Signal quality
The AT+CSQ execute command indicates the received signal strength <rssi> and the channel bit error rate
<ber>.
Syntax
Parameter Description
0 -113 dBm or less
1 -111 dBm
2..30 -109... -53 dBm
31 -51 dBm or greater
99 not known or not detectable
To check the bit error rate there must be a call in progress to obtain realistic values. If no call is set up, there is
no BER to be determined. In this case the indicated value may be 0 or 99, depending on the SIM card.
0..7 as RXQUAL values in the table in GSM 05.08 section 8.2.4.
99 not known or not detectable
Note
• After using network related commands such as AT+CCWA, AT+CCFC, AT+CLCK, users are advised to wait 3s
before entering AT+CSQ. This is recommended to be sure that any network access required for the preceding
command has finished.
Test Command
AT+CSQ=?
Response(s)
+CSQ: (list of supported<rssi>s), (list of supported<ber>s)
OK
Exec Command
AT+CSQ
Response(s)
+CSQ: <rssi>,<ber>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<rssi>(num)
<ber>(num)
MC55i AT Command Set
8.6 AT^SMONC s
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8.6 AT^SMONC Cell Monitoring
The AT^SMONC execute command delivers cell information containing 9 values from a maximum of 7 base sta-
tions. The first base station is the serving cell.
Syntax
Parameter Description
Mobile country code
3 digits, e.g. 232
000 Not decoded
Mobile network code
2 digits or 3 digits, e.g. 07 or 003
000 Not decoded
Location area code
4 hexadecimal digits, e.g. 4EED
0000 Not decoded
Cell identifier
4 hexadecimal digits, e.g. 4EAF
0000 Not decoded
Test Command
AT^SMONC=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT^SMONC
Response(s)
^SMONC: <MCC>1, <MNC>1, <LAC>1, <cell>1, <BSIC>1, <chann>1, <RSSI>1, <C1>1, <C2>1, <MCC>2,
<MNC>2, <LAC>2, <cell>2, <BSIC>2, <chann>2, <RSSI>2, <C1>2, <C2>2, ...
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS, 3GPP TS 05.08 + + + + + + - - -
<MCC>(num)
<MNC>(num)
<LAC>(num)
<cell>(num)
MC55i AT Command Set
8.6 AT^SMONC s
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Base station identity code
2 digits, e.g. 32
00 Not decoded
ARFCN (Absolute Frequency Channel Number)
0 Not decoded. In this case, all remaining parameters related to the same chan-
nel are neither decoded. For example, a non-existing cell appears as follows:
000,000,0000,0000,00,0,0,-,-
Received signal level of the BCCH carrier (0..63). The indicated value is composed of the measured value in
dBm plus an offset. This is in accordance with a formula specified in 3GPP TS 05.08
Coefficient for base station reselection, e.g. 30. In dedicated mode, under certain conditions the parameter can-
not be updated. In such cases a '-' is presented.
Coefficient for base station reselection, e.g. 30. In dedicated mode, under certain conditions the parameter can-
not be updated. In such cases a '-' is presented.
Note
• To some extent, the cell monitoring commands AT^MONI, AT^MONP and AT^SMONC cover the same param-
eters. The receiving level, for example, can be queried with all three commands. Yet the resulting values may
be slightly different, even though obtained over a time period of a few seconds. This is quite normal and noth-
ing to worry about, as the cell information is permanently updated.
<BSIC>(num)
<chann>(num)
<RSSI>(num)
<C1>(num)
<C2>(num)
MC55i AT Command Set
8.7 AT^SMOND s
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8.7 AT^SMOND Cell Monitoring
The AT^SMOND execute command can be used to obtain status information of the service cell and up to six neigh-
bour cells. The advantage over other cell monitoring commands is that AT^SMOND delivers more detailed infor-
mation about the received signal strength.
Syntax
Parameter Description
Serving cell information (comma-separated, no cr/lf included)
<MCC>,<MNC>,<LAC>,<cell>,<BSIC>,<chann>,<RxLev>,<RxLev>Full,<RxLev>Sub,<RxQual>,<RxQual
>Full,<RxQual>Sub,<Timeslot>
If no serving cell is found, unavailable values are omitted:" ,,,,,,<RxLev>,,,0,,,0"
Neighbour cell information for neighbour cell 1 through 6 (comma-separated, no cr/lf included)
<MCC>1,<MNC>1,<LAC>1,<cell>1,<BSIC>1,<chann>1,<RxLev>1, (these parameters repeated for neighbour
cells 2 through 6 with no CR/LF): ... <MCC>6,<MNC>6,<LAC>6,<cell>6,<BSIC>6,<chann>6,<RxLev>6
An unavailable cell appears as follows: " ,,,,,,0"
Values for RSSI and BER (comma-separated, no cr/lf included)
<RSSI>,<BER>
Mobile country code
3 digits, e.g. 232
000 Not decoded
Test Command
AT^SMOND=?
Response(s)
OK
ERROR
+CME ERROR
Exec Command
AT^SMOND
Response(s)
^SMOND: [<sci>][, <nci>][, <TA>][, <rssiber>]
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS, 3GPP TS 05.08 + + + + + + - - -
<sci>(str)
<nci>(str)
<rssiber>(str)
<MCC>(num)
MC55i AT Command Set
8.7 AT^SMOND s
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Mobile network code
2 digits or 3 digits, e.g. 07 or 003
000 Not decoded
Location area code
4 hexadecimal digits, e.g. 4EED
0000 Not decoded
Cell identifier
4 hexadecimal digits, e.g. 4EAF
0000 Not decoded
Base station identity code
2 digits, e.g. 32
00 Not decoded
ARFCN (Absolute Frequency Channel Number)
Received signal level in dBm
Received signal quality as defined in GSM05.08
Assigned timeslot. If mobile is in idle mode, timeslot 0 (BCCH timeslot) will be indicated.
0...8 Assigned timeslot
Timing advance for the serving cell, in bits.
Receive Level, with value 99 indicateing "not known or not detectable"
0...31 Signifies the RSSI range from -113dBm or less ("0") to -51dBm or greater
("31") in steps of -2dBm (e.g. "1" = -111 dBm, "2" = -109 dBm ..., "30" = -
53dBm)
Bit Error rate, with value 99 indicating "not known or not detectable"
0...7 as RXQUAL values RXQUAL0 to RXQUAL7 in GSM 05.08 section 8.2.4
<MNC>(num)
<LAC>(num)
<cell>(num)
<BSIC>(num)
<chann>(num)
<RxLev>(num)
<RxQual>(num)
<Timeslot>(num)
<TA>(num)
<RSSI>(num)
<BER>(num)
MC55i AT Command Set
8.7 AT^SMOND s
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Notes
• To some extent, the cell monitoring commands AT^SMOND, AT^MONI, AT^MONP and AT^SMONC cover the
same parameters. The receiving level, for example, can be queried with all three commands. Yet the resulting
values may be slightly different, even though obtained over a time period of a few seconds. This is quite nor-
mal and nothing to worry about, as the cell information is permanently updated.
• During a connection, not all of the neighbour cell information can be decoded. The following restrictions apply:
- Information is updated only for neighbour cells that have already been visible at connection setup, and
continue to be included in the list of cells.
- New neighbour cells added to the list, for example after handover, cannot be displayed until the connection
is released.
Example
at^smond
Execute command
^SMOND:262,01,3008,6060,32,100,66,,,0,,,0,
262,01,3008,DDD1,35,92,80,
262,01,3008,,31,96,83,
262,01,3008,BFBE,35,27,86,
262,01,3008,,32,98,88,
262,01,3008,BB44,32,90,89,
262,01,3008,8307,31,22,93,
2,23,99
Line breaks inserted for readability in print
MC55i AT Command Set
8.8 AT^MONI s
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8.8 AT^MONI Monitor idle mode and dedicated mode
The AT^MONI command supplies information of the serving/dedicated cell. There are two ways to retrieve the
information: once on request by using the execute command or automatically every <period> seconds by using
the write command. To stop the periodic presentation type "AT" or "at".
Syntax
Parameter Description
Display period in seconds
1...254
Notes
• The two header lines (see Section 8.8.1, AT^MONI responses) are output after every ten data lines.
• The length of following output lines exceeds 80 characters. Therefore a terminal program may draw a carriage
return on a screen. However, this is not part of the response.
• The parameters LAC and cell are presented as hexadecimal digits, the remaining parameters are composed
of decimal digits.
• If the radio cell changes during a connection, the parameters PWR, RXLev and C1 of the 'Serving Cell' part
cannot be updated under certain conditions.
• If the BS supports frequency hopping during a connection, the dedicated channel (parameter chann) is not
stable. This mode is indicated by chann = 'h'.
• To some extent, the cell monitoring command AT^SMONC covers the same parameters. The receiving level,
for example, can be queried with both commands. Yet the resulting values may be slightly different, even
though obtained over a time period of a few seconds. This is quite normal and nothing to worry about, as the
cell information is permanently updated.
• For compatibility with earlier products and to support legacy applications, any input character may be used to
stop the output in certain cases (depending on the settings of AT+IPR and AT+CMUX).
Test Command
AT^MONI=?
Response(s)
^MONI:(list of supported <period>s)
OK
Exec Command
AT^MONI
Response(s)
See: Section 8.8.1, AT^MONI responses
OK
Write Command
AT^MONI=<period>
Response(s)
See: Section 8.8.1, AT^MONI responses
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<period>(num)
MC55i AT Command Set
8.8 AT^MONI s
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8.8.1 AT^MONI responses
ME is not connected:
a) ME is camping on a cell and registered to the network:
b) ME is camping on a cell but not registered to the network (only emergency call allowed):
c) ME camping on a cell, but searching for a better cell (cell reselection):
d) ME is searching and could not (yet) find a suitable cell:
ME is connected (Call in progress):
Columns for Serving Cell:
Columns for Dedicated channel:
Serving Cell I Dedicated channel
chann rs dBm MCC MNC LAC cell NCC BCC PWR RXLev C1 I chann TS timAdv PWR dBm Q ChMod
1013 21 -71 001 01 1001 0103 7 7 33 -105 33 I No connection
Serving Cell I Dedicated channel
chann rs dBm MCC MNC LAC cell NCC BCC PWR RXLev C1 I chann TS timAdv PWR dBm Q ChMod
1013 21 -71 001 01 1001 0103 7 7 33 -105 33 I Limited Service
Serving Cell I Dedicated channel
chann rs dBm MCC MNC LAC cell NCC BCC PWR RXLev C1 I chann TS timAdv PWR dBm Q ChMod
1013 21 -71 001 01 1001 0103 7 7 33 -105 33 I Cell Reselection
Serving Cell I Dedicated channel
chann rs dBm MCC MNC LAC cell NCC BCC PWR RXLev C1 I chann TS timAdv PWR dBm Q ChMod
Searching
Serving Cell I Dedicated channel
chann rs dBm MCC MNC LAC cell NCC BCC PWR RXLev C1 I chann TS timAdv PWR dBm Q ChMod
1013 19 -76 001 01 1001 0103 7 7 33 -105 33 I 1015 1 0 5 -76 0 S_HR
Column Description
chann ARFCN (Absolute Frequency Channel Number) of the BCCH carrier
rs RSSI value 0 - 63 (RSSI = Received signal strength indication)
dBm Receiving level of the BCCH carrier in dBm
MCC Mobile Country Code (first part of the PLMN code)
MNC Mobile Network Code (second part of the PLMN code)
LAC Location area code, see note
cell Cell ID
NCC PLMN colour code
BCC Base station colour code
PWR Maximal power level used on RACH channel in dBm
RXLev Minimal receiving level (in dBm) to allow registration
C1 Coefficient for base station selection
Column Description
chann ARFCN (Absolute Frequency Channel Number) of the TCH carrier
Note: <chann> = h indicates frequency hopping.
TS Timeslot number
MC55i AT Command Set
8.8 AT^MONI s
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8.8.2 Service states
Depending on the service state, an additional textual output is generated (refer also to the response examples):
• 'Searching' - The MS is searching, but could not (yet) find a suitable cell. This output appears after restart of
the MS or after loss of coverage.
• 'No connection' - The MS is camping on a cell and registered to the network. The service state is 'idle', i.e.
there is no connection established or a dedicated channel in use.
• 'Cell Reselection' - The MS has not yet lost coverage but is searching for a better cell, since the cell reselec-
tion criterion is fulfilled.
• 'Limited Service' - The MS is camping on a cell but not registered to the network. Only emergency calls are
allowed. The MS enters this state, for example, when
- no SIM card is inserted, or PIN has not been given,
- neither Home PLMN nor any other allowed PLMN are found,
- registration request was not answered or denied by the network (use command AT+CREG to query the
registration status),
- authentication failed.
timAdv Timing advance in bits
PWR Current power level
dBm Receiving level of the traffic channel carrier in dBm
QReceiving quality (0-7)
ChMod Channel mode (--: Signalling, S_HR: Half rate, S_FR: Full rate, S_EFR: Enhanced
Full Rate, A_HR: AMR Half rate, A_FR: AMR Full rate)
Column Description
MC55i AT Command Set
8.9 AT^MONP s
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8.9 AT^MONP Monitor neighbour cells
The AT^MONP supplies information of up to six neighbour cells. There are two ways to retrieve the information:
once on request by using the execute command or automatically every <period> seconds by using the write
command. To stop the periodic presentation type "AT" or "at".
Syntax
Parameter Description
Display period in seconds
1...254
Notes
• Due to the fact that not all necessary information of the neighbour cells can be decoded during a connection,
there are several constraints to be considered:
- Only neighbour cells that have already been visible in IDLE mode will be further updated, as long as they
are still included in the list.
- Though new neighbour cells can be added to the list (e.g. due to handover), their C1 and C2 parameters
cannot be displayed until the connection is released. In this case "-" will be presented for C1 and C2.
• To some extent, the cell monitoring command AT^SMONC covers the same parameters. The receiving level,
for example, can be queried with both commands. Yet the resulting values may be slightly different, even
though obtained over a time period of a few seconds. This is quite normal and nothing to worry about, as the
cell information is permanently updated.
• For compatibility with earlier products and to support legacy applications, any input character may be used to
stop the output in certain cases (depending on the settings of AT+IPR and AT+CMUX).
Test Command
AT^MONP=?
Response(s)
^MONP:(list of supported <period>s)
OK
Exec Command
AT^MONP
Response(s)
See: Section 8.9.1, AT^MONP responses
OK
Write Command
AT^MONP=<period>
Response(s)
See: Section 8.9.1, AT^MONP responses
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<period>(num)
MC55i AT Command Set
8.9 AT^MONP s
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8.9.1 AT^MONP responses
Response of AT^MONP (Example):
chann rs dBm MCC MNC BCC C1 C2
653 26 -84 262 07 0 22 22
660 20 -90 262 07 3 16 16
687 19 -91 262 07 1 15 15
678 14 -96 262 07 3 10 10
671 14 -96 262 07 1 10 10
643 10 -100 262 07 7 6 6
Column Description
Chann ARFCN (Absolute Radio Frequency Channel Number) of the BCCH carrier
rs RSSI value 0 - 63 (RSSI = Received signal strength indication)
dBm Receiving level in dBm
MCC Mobile Country Code (first part of the PLMN code)
MNC Mobile Network Code (second part of the PLMN code)
BCC Base Station colour code
C1 cell selection criterion
C2 cell reselection criterion
MC55i AT Command Set
8.10 AT^SMONG s
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8.10 AT^SMONG GPRS Monitor
The AT^SMONG command supplies GPRS specific cell information. There are two ways to retrieve the informa-
tion: once on request by using the execute command or automatically every <period> seconds by using the
write command. To stop the periodic presentation type "AT" or "at".
Syntax
Parameter Description
1 Cell Info Table
Display period in seconds
If <period> is omitted the cell data will be presented only once on a single line (as if Execute command was
issued).
If <period> is given, the cell data will be listed repeatedly on 10 data lines. Every 10th data line is followed by
the header, simply to repeat the column titles.
1...100
Test Command
AT^SMONG=?
Response(s)
^SMONG:(list of supported <table>s), (list of supported <period>s)
OK
ERROR
+CME ERROR
Exec Command
AT^SMONG
Response(s)
GPRS Monitor
Cell Info Table (see: Section 8.10.1, AT^SMONG Cell Info Table)
OK
ERROR
+CME ERROR
Write Command
AT^SMONG=<table>[, <period>]
Response(s)
^SMONG: GPRS Monitor
Cell Info Table (see: Section 8.10.1, AT^SMONG Cell Info Table)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<table>(num)
<period>(num)
MC55i AT Command Set
8.10 AT^SMONG s
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Note
• For compatibility with earlier products and to support legacy applications, often any input character will stop
the periodic output of the write command. But since this applies only in certain cases (depending on the set-
tings of AT+IPR and AT+CMUX), it is recommended to always use "at" or "AT".
8.10.1 AT^SMONG Cell Info Table
Example output for AT^SMONG:
Columns of the cell info table:
GPRS Monitor
BCCH G PBCCH PAT MCC MNC NOM TA RAC # Cell #
0637 1 - 4 234 05 2 00 0B
Column Description
BCCH ARFCN of BCCH carrier
GGPRS available ("1") or not available ("-") in currently used cell
PBCCH If PBCCH is present, indication of ARFCN, else ''-'' or if Frequency Hopping is used ''H''
PAT Priority Access Threshold (GSM Rec. 04.08 / 10.5.2.37b)
0 Packet access is not allowed in the cell
1 Spare, shall be interpreted as "000" (packet access not allowed)
2 Spare, shall be interpreted as "000" (packet access not allowed)
3 Packet access is allowed for priority level 1
4 Packet access is allowed for priority level 1 to 2
MCC Mobile Country Code
MNC Mobile Network Code
NOM Network Operation Mode (1...3)
TA Timing Advance Value
RAC Routing Area Code (as hexadecimal value)
MC55i AT Command Set
8.11 AT^SALS s
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8.11 AT^SALS Alternate Line Service
The AT^SALS command is designed to support Alternate Line Service. This allows the subscriber to use two
voice numbers on the same SIM card (service requires a dual line SIM card).
The write command enables or disables the presentation of <view> and specifies the <line> used for outgoing
calls. The read command returns the presentation mode of <view> and the currently selected <line>.
Syntax
Unsolicited Result Code
If switched on with <view>=1:
^SALS: <line>
Indicates the line used by an incoming call.
Parameter Description
Controls the presentation mode of the URC "^SALS" which indicates the line number used by an incoming call:
0(&F)(P) Disables indication of the called line
1 Enables indication of the called line
Selects the line to be used for outgoing calls. Setting is global for the ME and non volatile.
1(&F)(D) ALS Line 1
2 ALS Line 2
Note
• If a non ALS SIM is inserted, the <line> will be reset to line 1.
Test Command
AT^SALS=?
Response(s)
^SALS:(list of supported <view>s), (list of supported <line>s)
OK
Read Command
AT^SALS?
Response(s)
^SALS: <view>, <line>
OK
ERROR
Write Command
AT^SALS=<view>[, <line>]
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<view>(num)
<line>(num)
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8.11 AT^SALS s
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Example
AT^SALS=1,1
Line 1 has been selected for outgoing calls. "^SALS" URC is enabled.
RING
You receive a notification that you have an incoming call on line 2.
^SALS: 2
MC55i AT Command Set
8.12 AT^SHOM s
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8.12 AT^SHOM Display Homezone
The AT^SHOM returns the homezone state. The result is valid only, if network registration state <stat> is 1 (reg-
istered) (see AT+CREG).
The feature is available only for supported network operators (Viag, One2One, Orange and LCI) and requires a
suitable SIM card. If the homezone feature is not supported by the network operator or SIM card, result is always
0.
Syntax
Parameter Description
0 ME is out of Homezone
1 ME is within the Homezone
Test Command
AT^SHOM=?
Response(s)
OK
Exec Command
AT^SHOM
Response(s)
^SHOM: <homezonestate>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<homezonestate>(num)
MC55i AT Command Set
8.13 AT^SPLM s
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8.13 AT^SPLM Read the PLMN list
The AT^SPLM execute command returns the list of operators from the ME. Each operator code <numeric> that
has an alphanumeric equivalent <alpha> in the ME memory is returned. The list is sorted by operator codes.
See also GSM 07.07: AT+COPN, AT+COPS
Syntax
Parameter Description
Operator in numeric form; GSM location area identification number
Operator in long alphanumeric format; can contain up to 16 characters
Test Command
AT^SPLM=?
Response(s)
OK
If error is related to ME functionality:
ERROR
+CME ERROR: <err>
Exec Command
AT^SPLM
Response(s)
^SPLM:<numeric>, long <alpha>
^SPLM:[... ]
OK
If error is related to ME functionality:
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<numeric>(str)
<alpha>(str)
MC55i AT Command Set
8.14 AT+CPOL s
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8.14 AT+CPOL Preferred Operator List
The AT+CPOL read command returns the list of the preferred operators. The AT+CPOL write command allows to
edit the list of the preferred operators. If <index> is given but <operator> is left out, the entry is deleted.
Syntax
Parameter Description
The order number of the operator in the SIM preferred operator list.
2 Numeric format
Operator in numeric format (GSM Location Area Identification number which consists of a 3-digit country code
plus a 2- or 3-digit network code).
Note
• If you enter AT+CPOL=? immediately after the CHV, you get the URC: "+CME ERROR: operation not
allowed". In addition the AT+CPOL command is blocked until the ME is restarted. You get at any time the faulty
response: "+CME ERROR: operation not allowed". The preferred operator list will not be shown.
To avoid this problem and to check the status of SIM initialization after CHV you can activate the "^SIND: sim-
status" URC provided by AT^SIND.
Test Command
AT+CPOL=?
Response(s)
+CPOL:(list of supported <index>s), (list of supported <format>s)
OK
ERROR
+CME ERROR
Read Command
AT+CPOL?
Response(s)
+CPOL: <index>, <format>, <operator>
+CPOL: ...
OK
ERROR
+CME ERROR
Write Command
AT+CPOL=<index>[, <format>, <operator>]
Response(s)
OK
ERROR
+CME ERROR:
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<index>(num)
<format>(num)
<operator>(str)
MC55i AT Command Set
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8.15 AT^SPLR Read entry from the preferred operators list
The AT^SPLR write command returns used entries from the SIM list of preferred operators with <indexa>
between <index1> and <index2>. If <index2> is not given, only entry at <index1> is returned. The test com-
mand returns the whole index range supported by the SIM.
See also GSM 07.07: AT+CPOL
Syntax
Parameter Description
Location number to start reading from
Location number where to stop reading
Index range supported by the SIM card (between <index1> and <index2>)
Operator in numeric form; GSM location area identification number
Test Command
AT^SPLR=?
Response(s)
^SPLR:(list of supported) <indexa>s
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SPLR=<index1>[, <index2>]
Response(s)
^SPLR: <index1><oper>
^SPLR: <index2><oper>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<index1>(num)
<index2>(num)
<indexa>(num)
<oper>(str)
MC55i AT Command Set
8.16 AT^SPLW s
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8.16 AT^SPLW Write an entry to the preferred operators list
The AT^SPLW write command writes an entry to the SIM list of preferred operators at location number <index>.
If <index> is given but <oper> is left out, the entry is deleted. An operator can be only once in the list. Test
command returns the whole index range supported by the SIM.
See also GSM 07.07: AT+CPOL
Syntax
Parameter Description
location number
Operator in numeric format (GSM Location Area Identification number which consists of a 3-digit country code
plus a 2- or 3-digit network code).
Test Command
AT^SPLW=?
Response(s)
^SPLW:(list of supported) <index>s
OK
ERROR
+CME ERROR:
Write Command
AT^SPLW=<index>[, <oper>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<index>(num)
<oper>(str)
MC55i AT Command Set
9. Supplementary Service Commands s
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9. Supplementary Service Commands
The AT Commands described in this chapter are related to the Supplementary Services offered by the GSM net-
work.
9.1 AT+CACM Accumulated call meter (ACM) reset or query
Syntax
Command Description
The read command returns the current ACM value.
The write command resets the Advice of Charge related to the accumulated call meter (ACM) value in SIM file
EF(ACM). ACM contains the total number of home units for both the current and preceding calls.
Parameter Description
Three bytes of the current ACM value in hexadecimal format (e.g. "00001E" indicates decimal value 30) 000000
- FFFFFF.
SIM PIN2
Test Command
AT+CACM=?
Response(s)
OK
Read Command
AT+CACM?
Response(s)
+CACM: <acm>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CACM=[<passwd>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<acm>(str)
<passwd>(str)
MC55i AT Command Set
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9.2 AT^SACM Advice of charge and query of ACM and ACMmax
Syntax
Unsolicited Result Code
+CCCM: <ccm>
When activated, an unsolicited result code is sent when the CCM value changes, but not more often than every
10 seconds.
Command Description
The execute command can be used to query the current mode of the Advice of Charge supplementary service,
the SIM values of the accumulated call meter (ACM) and accumulated call meter maximum (ACMmax).
The write command enables or disables the presentation of unsolicited result codes to report the call charges.
Parameter Description
[0](&F) suppress unsolicited result code
1 display unsolicited result code
Three bytes of the current ACM value in hexadecimal format (e.g. "00001E" indicates decimal value 30) 000000-
FFFFFF
Three bytes of the max. ACM value in hexadecimal format (e.g. "00001E" indicates decimal value 30) 000000
disable ACMmax feature 000001-FFFFFF
Test Command
AT^SACM=?
Response(s)
^SACM:(list of supported <n>s)
OK
Exec Command
AT^SACM
Response(s)
^SACM: <n>, <acm>, <acmMax>
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SACM=<n>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<n>(num)(&W)(&V)
<acm>(str)(&V)
<acmMax>(str)(&V)
MC55i AT Command Set
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Three bytes of the current CCM value in hexadecimal format (e.g. "00001E" indicates decimal value 30); bytes
are coded in the same way as ACMmax value in the SIM 000000-FFFFFF
Notes
• When you power down or reset the ME with AT+CFUN=1,1 the URC presentation mode will be reset to its
default. To benefit from the URC it is recommended to have the setting included in the user profile saved with
AT&W, or to select <n>=1 every time you reboot the ME.
• See also GSM07.07: AT+CACM, AT+CAMM, AT+CAOC.
<ccm>(str)
MC55i AT Command Set
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9.3 AT+CAMM Accumulated call meter maximum (ACMmax) set or
query
Syntax
Command Description
The read command returns the current ACMmax value.
The write command sets the Advice of Charge related to the accumulated call meter maximum value in SIM file
EF (ACMmax). ACMmax contains the maximum number of home units allowed to be consumed by the sub-
scriber.
Parameter Description
Three bytes of the max. ACM value in hexadecimal format (e.g. "00001E" indicates decimal value 30) 000000
disable ACMmax feature 000001-FFFFFF.
SIM PIN2
Test Command
AT+CAMM=?
Response(s)
OK
Read Command
AT+CAMM?
Response(s)
+CAMM: <acmmax>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CAMM=<acmmax>[, <passwd>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<acmmax>(str)
<passwd>(str)
MC55i AT Command Set
9.4 AT+CAOC s
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9.4 AT+CAOC Advice of Charge information
Syntax
Command Description
Execute command returns the current call meter value.
The write command sets the Advice of Charge supplementary service function mode.
Parameter Description
0 query CCM value
Three bytes of the current CCM value in hexadecimal format (e.g. "00001E" indicates decimal value 30); bytes
are similarly coded as ACMmax value in the SIM 000000-FFFFFF.
Test Command
AT+CAOC=?
Response(s)
+CAOC: (list of supported<mode>s)
OK
Read Command
AT+CAOC?
Response(s)
+CAOC: <mode>
OK
Exec Command
AT+CAOC
Response(s)
ERROR
+CME ERROR: <err>
If <mode>=0, TA returns the current call meter value:
+CAOC: <ccm>
OK
Write Command
AT+CAOC=[<mode>]
Response(s)
ERROR
+CME ERROR: <err>
If <mode>=0, TA returns the current call meter value.
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<mode>(num)(&V)
<ccm>(str)
MC55i AT Command Set
9.5 AT+CCUG s
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9.5 AT+CCUG Closed User Group
Syntax
Command Description
The Test command returns the supported parameters.
The Read command returns if the Explicit CUG invocation is activated (in parameter <n>), which CUG <index>
is chosen, and if Preferential Group or Outgoing Access is suppressed (in parameter <info>).
The write command serves to activate or deactivate the explicit CUG invocation, to set the desired index, and to
specify if Preferential Group or Outgoing Access shall be suppressed.
Parameter Description
explicit CUG invocation options
0(D) Deactivate explicit CUG invocation
1 Activate explicit CUG invocation
0-9 explicit selection of CUG index
10(D) No index (preferred CUG taken from subscriber data)
Test Command
AT+CCUG=?
Response(s)
list of supported <n>, range of supported <index>, range of supported <info>
OK
ERROR
+CME ERROR
Read Command
AT+CCUG?
Response(s)
+CCUG:<n>, <index>, <info>
OK
ERROR
+CME ERROR
Write Command
AT+CCUG=[[<n>][, <index>][, <info>]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.85, GSM 03.85,
GSM 04.85
+ + + + + + - - -
<n>(num)
<index>(num)
MC55i AT Command Set
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state of the call
0(D) no information
1 suppress outgoing access
2 suppress preferential CUG
3 Suppress preferential CUG and Outgoing Access.
Notes
• The active settings for omitted parameters are retained without changes.
• Explicit CUG invocation means that at each call setup, CUG information is added to the called number.
• Upon delivery, settings are predefined with
<n>=0,
<index>=10,
<info>=0.
These delivery defaults cannot be recalled automatically.
• When starting a call with ATD, Parameter 'G' or 'g' of command ATD will have no effect if the option selected
for this single call is identical to the option already selected with AT+CCUG.
• Current settings are saved in the ME automatically.
•ATZ or AT&F do not influence the current settings.
• some combinations of parameters may lead to rejection of CUG calls by the network. For more information,
please consult GSM 04.85
<info>(num)
MC55i AT Command Set
9.6 AT+CCFC s
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9.6 AT+CCFC Call forwarding number and conditions control
AT+CCFC controls the call forwarding supplementary service. Registration, erasure, activation, deactivation and
status query are supported.
Syntax
Parameter Description
Reason for call forwarding
0 unconditional
1 mobile busy
2 no reply
3 not reachable
4 all call forwarding (includes reasons 0, 1, 2 and 3)
5 all conditional call forwarding (includes reasons 1, 2 and 3)
Network operation to be performed for Supplementary service "call forwarding"
0 disable call forwarding (disable service)
1 enable call forwarding (enable service)
2 query status of call forwarding (query service status)
3 register <number> and activate call forwarding (register service)
4 erase <number> and deactivate call forwarding (erase service)
Test Command
AT+CCFC=?
Response(s)
+CCFC:(list/range of supported <reason>s)
OK
Write Command
AT+CCFC=<reason>, <mode>[, <number>[, <type>[, <class>[, <time>]]]]
Response(s)
If <mode> is not equal 2 and command successful:
OK
If <mode>= 2, <reason> is not equal 2 and command successful:
+CCFC: <status>, <class>[, <number>, <type>]
OK
If <mode>= 2, <reason>= 2 and command successful:
+CCFC: <status>, <class>[, <number>, <type>, <time>]
OK
If error is related to ME functionality
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.04, GSM 02.82,
GSM 03.82, GSM 04.82
+ + + + + + - - -
<reason>(num)
<mode>(num)
MC55i AT Command Set
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String type phone number of forwarding address in format specified by <type>. If you select <mode>= 3, the
phone <number> will be registered in the network. This allows you to disable / enable CF to the same destination
without the need to enter the phone number once again. Depending on the services offered by the provider the
registration may be mandatory before CF can be used. The number remains registered in the network until you
register another number or erase it using <mode> = 4.
Type of address octect
145 dialing string <number> includes international access code character '+'
129 otherwise
Integer or sum of integers each representing a class of information, i.e. a bearer service, telecommunication ser-
vice or bearer service group as defined in "GSM 02.04"
1voice
2data
<class> 2 (data) comprises all those <class> values between 16 and 128, that
are supported both by the network and the MS. This means, a setting made for
<class> 2 applies to all remaining data classes (if supported). In addition, you
can assign a different setting to a specific class. For example, you can activate
Call Forwarding for all data classes, but deactivate it for a specific data class.
4fax
8SMS
16 data circuit sync
32 data circuit async
64 dedicated packet access
128 dedicated PAD access
1...[7]...255 combination of some of the above classes. For example, the default setting 7
represents the sum of the integers 1, 2 and 4 (CF for voice, data and fax). The
value 255 covers all classes. If the <class> parameter is omitted, the default
value 7 is used.
5...[20]...30 Time to wait before call is forwarded, rounded to a multiple of 5 sec. (only for
<reason>=no reply)
0 Call Forwarding not active
1 Call Forwarding active
Notes
• You can register, disable, enable and erase <reason> 4 and 5 as described above. However, querying the
status of <reason> 4 and 5 with AT+CCFC will result in an error ("CME error: Operation not supported"). As
an alternative, you may use the ATD command followed by *'# codes to check the status of these two reasons.
See Star-Hash (*#) Network Commands for a complete list of *# GSM codes. See also examples below.
• Most networks will not permit registration of new parameters for conditional call forwarding (reasons 1,2,3,5)
while unconditional call forwarding is enabled.
<number>(str)
<type>(num)
<class>(num)
<time>(num)
<status>(num)
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•The AT+CCFC command offers a broad range of call forwarding options according to the GSM specifications.
However, when you attempt to set a call forwarding option which is not provisioned or not yet subscribed to,
the setting will not take effect regardless of the response returned. The responses in these cases vary with
the network (for example "OK", "Operation not allowed", "Operation not supported" etc.). To make sure check
the call forwarding status with <mode>=2.
• Some networks may choose to have certain call forwarding condtions permanently enabled (e.g. forwarding
to a mailbox if the mobile is not reachable). In this case, erasure or deactivation of call forwarding for these
conditions will not be successful, even if the CCFC request is answered with response "OK".
• The command has been implemented with the full set of <class> parameters according to GSM 07.07. For
actual applicability of SS "call forwarding" to a specific service or service group (a specific <class> value)
please consult table A.1 of GSM 02.04.
• There is currently no release of GSM standard "GSM 02.04", in which the "Call Forwarding" Supplementary
Service is defined as applicable to SMS services.
Example
Please note that when you configure or query call forwarding without specifying any classes, the settings will
refer to classes 1, 2 and 4 only (=default). The handling of classes is equivalent to AT+CLCK.
• To register the destination number for unconditional call forwarding (CFU):
The destination number will be registered for voice, data and fax services (default <class> 7).
In most networks, the registration will also cause call forwarding to be activated for these <class> values.
• To query the status of CFU without specifying <class>:
• To deactivate CFU without specifying <class>:
To check whether CFU was successfully deactivated (note that the destination number remains registered in
the network when you disable CFU):
• To erase the registered CFU destination number:
Now, when you check the status, no destination number will be indicated:
at+ccfc=0,3,"+493012345678",145
OK
at+ccfc=0,2
+CCFC: 1,1,"+493012345678",145
+CCFC: 1,2,"+493012345678",145
+CCFC: 1,4,"+493012345678",145
OK
at+ccfc=0,0
OK
at+ccfc=0,2
+CCFC: 0,1,"+493012345678",145
+CCFC: 0,2,"+493012345678",145
+CCFC: 0,4,"+493012345678",145
OK
at+ccfc=0,4
OK
at+ccfc=0,2
+CCFC: 0,1
+CCFC: 0,2
+CCFC: 0,4
OK
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• To query the status of CFU for all classes:
•<reason> 4 or 5 cannot be used to query the status of all call forwarding reasons (see also notes above):
at+ccfc=0,2,,,255
+CCFC: 0,1
+CCFC: 0,2
+CCFC: 0,4
+CCFC: 0,8
+CCFC: 0,16
+CCFC: 0,32
+CCFC: 0,64
+CCFC: 0,128
OK
at+ccfc=4,2
+CME error: operation not supported
at+ccfc=5,2
+CME error: operation not supported
MC55i AT Command Set
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9.7 AT+CCWA Call Waiting
The AT+CCWA write command controls the "Call Waiting" supplementary service according to GSM 02.83. Acti-
vation, deactivation and status query are supported. The read command returns the current value of <n>.
Syntax
Unsolicited Result Codes
URC 1
Indication of a call that is currently waiting and can be accepted.
+CCWA: <calling number>, <type of number>, <class>, , <CLI validity>
If <n>=1 and the call waiting supplementary service is enabled in the network, URC "+CCWA" indicates a wait-
ing call to the TE. It appears while the waiting call is still ringing.
URC 2
Indication of a call that has been waiting.
^SCWA:
If <n>=1 and the call waiting supplementary service is enabled in the network, this URC indicates that a wait-
ing call rang when the ME was in online mode during a CSD call, but the calling party hung up before the ME
went back to command mode.
Test Command
AT+CCWA=?
Response(s)
+CCWA:(list of supported <n>s)
OK
Read Command
AT+CCWA?
Response(s)
+CCWA:<n>
OK
Write Command
AT+CCWA=[[<n>][, <mode>][, <class>]]
Response(s)
If <mode> is not equal 2 and command successful:
OK
If <mode>= 2 and command successful:
+CCWA: <status>, <class>
[+CCWA: <status>, <class>]
[+CCWA: ...]
OK
If error is related to ME functionality
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.04, GSM 02.83,
GSM 03.83, GSM 04.83
+ + + + + + - - -
MC55i AT Command Set
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Parameter Description
Switch URCs "+CCWA" and "^SCWA" for call waiting on/off
0 Disable display of URCs "+CCWA" and "^SCWA"
1 Enable display of URCs "+CCWA" and "^SCWA"
Network operation to be performed for Supplementary service call waiting
0 Disable call waiting (disable service)
1 Enable call waiting (enable service)
2 Query status of call waiting (query service status)
Integer or sum of integers each representing a class of information, i.e. a bearer service, telecommunication ser-
vice or bearer service group as defined in "GSM 02.04".
In the write command, parameter <class> specifies the class of the active call during which an incoming call
of any class is to be regarded as a waiting call.
In URC "+CCWA: <calling number>, <type of number>, <class>, , <CLI validity>", parameter
<class> specifies the class of the waiting call.
1Voice
2Data
<class> 2 (data) comprises all those <class> values between 16 and 128, that
are supported both by the network and the MS. This means, a setting made for
<class> 2 applies to all remaining data classes (if supported). In addition, you
can assign a different setting to a specific class. For example, you can activate
call waiting for all data classes, but deactivate it for a specific data class.
4Fax
[7] Voice, data and fax (1+2+4)
8SMS
16 Data circuit sync
32 Data circuit async
64 Dedicated packet access
128 Dedicated PAD access
1...[7]...255 Combination of some of the above classes. For example, the default setting 7
represents the sum of the integers 1, 2 and 4 (CF for voice, data and fax). The
value 255 covers all classes. If parameter "class"is omitted, the default value 7
is used.
0 Call waiting service is not active
1 Call waiting service is active
Phone number of waiting caller in the format specified by parameter <type of number>.
Type of address octet in integer format (refer to GSM 04.08, subclause 10.5.4.7)
145 <calling number> includes international access code character '+'
<n>(num)
<mode>(num)
<class>(num)
<status>(num)
<calling number>(str)
<type of number>(num)
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128 number restricted
129 Otherwise
0 CLI valid
1 CLI has been withheld
2 CLI is not available
Notes
• If the active call is a CSD call, and a waiting call is received, then the ME produces a BREAK while still in
online mode, and displays
- the +CCWA URC (as above) when the ME goes back to command mode while the waiting call is still active
and can be accepted;
- or the ^SCWA URC (as above) when the ME goes back to command mode after the waiting call has
ended.
• With the AT+CHLD command, it is possible to establish a multiparty call or to set the active voice call on hold
and then accept a waiting voice call (not possible with fax and data call). See also AT+CHLD
• Users should be aware that if call waiting is activated (<mode>=1), the presentation of URCs needs to be
enabled, too (<n>=1).
Otherwise, on the one hand, a waiting caller would be kept waiting due to lack of BUSY signals, while, on the
other hand, the waiting call would not be indicated to the called party.
• The AT+CCWA command offers a broad range of options according to the GSM specifications. However,
when you attempt to enable call waiting for a <class> for which the service is not provisioned or not sup-
ported , the setting will not take effect regardless of the response returned. The responses in these cases vary
with the network (for example "OK", "Operation not allowed", "Operation not supported" etc.). To make sure
check the current call waiting settings with <mode>=2.
• The AT+CCWA command has been implemented with the full set of <class> parameters according to
GSM 07.07. For actual applicability of SS call waiting to a specific service or service group (a specific
<class> value) please consult table A.1 of GSM 02.04
• Despite the specifications stated in GSM 02.04 call waiting is not handled uniformly among all networks:
GSM 02.04, Annex A, provides the following specification:
"The applicability of call waiting refers to the telecommunication service of the active call and not of the waiting
call. The incoming, waiting, call may be of any kind." Nevertheless, networks do differ on the actual imple-
mentation of the service. For example, the activation of call waiting for <class> 4, "fax", causes some net-
works to send a call waiting indication if a call "of any kind" comes in during an active fax call, but others may
(with the same settings active) indicate a waiting fax call during any kind of active call. Thus, the only reliable
way to receive or prevent a call waiting indication under any circumstances and in any network, is to activate
or deactivate call waiting for all tele- and bearer services (<class> 255).
<CLI validity>(num)
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Examples
EXAMPLE 1
Parameter <n>
EXAMPLE 2
Parameter <mode>
EXAMPLE 3
Parameter <class>
at+ccwa=1
To enable the presentation of the URC
OK
at+ccwa=,1
To activate the supplementary service in the network for voice, data,
and fax calls (default classes).
Note that parameter <n> is left out. In this case, the current value of <n>
will be retained.
OK
at+ccwa=,2
To query the network status of call waiting for default classes
at+ccwa=1,1
Call Waiting is activated during voice calls.
at+ccwa=1,2
Call Waiting is activated during data calls.
at+ccwa=1,4
Call Waiting is activated during fax calls.
OK
AT+CCWA=,0,1
To deactivate call waiting for voice calls.
OK
MC55i AT Command Set
9.8 AT+CHLD s
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9.8 AT+CHLD Call Hold and Multiparty
Syntax
Command Description
TA controls the Supplementary Services Call Hold and Multiparty. Calls can be put on hold, recovered, released,
and added to a conversation.
Like for all Supplementary Services, the availability and detailed functionality of Call Hold and Multiparty services
depends on the configuration of the GSM network. The MC55i can only request the service, but the network
decides whether and how the request will be answered.
Parameter Description
0 Release all held calls or set User Determined User Busy (UDUB) for a waiting
call:
• If a call is waiting, release the waiting call. The calling party will receive a
"BUSY" indication (Supplementary Service User Determined User Busy
"UDUB")
• Otherwise, terminate all held calls (if any).
1 Terminate all active calls (if any) and accept "the other call" as the active call:
• If a call is waiting, the waiting call will be accepted.
• Otherwise, if a held call is present, the held call becomes active.
1X Terminate a specific call X (X= 1-7). The call may be active, held or waiting.
The remote party of the terminated call will receive a "NO CARRIER" indica-
tion. Parameter X is the call number <idx> of the targeted call in the list of cur-
rent calls available with AT command AT+CLCC.
2 Place all active calls on hold (if any) and accept "the other call" as the active
call:
• If a call is waiting, the waiting call will be accepted.
• Otherwise, if a held call is present, the held call becomes active.
2X Place all active calls except call X (X= 1-7) on hold. Parameter X is the call
number <idx> of the targeted call in the list of current calls available with AT
command AT+CLCC.
3 Add a held call to the active calls in order to set up a conference (multiparty)
call.
Test Command
AT+CHLD=?
Response(s)
+CHLD: (list of supported <n>s)
OK
Write Command
AT+CHLD=[<n>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<n>(num)
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Notes
•The AT+CHLD command offers a broad range of options according to the GSM specifications. However, if you
attempt to invoke an option which is not provisioned by the network, or not subscribed to, invocation of this
option will fail. The responses in these cases may vary with the network (for example "Operation not allowed",
"Operation not supported" etc.).
• The handling of the supplementary service Call hold and Multiparty varies with the types of calls. This is
because only voice calls can be put on hold, while data or fax calls cannot. The following procedures apply:
With AT+CHLD=2 the user can simultaneously place a voice call on hold and accept another waiting voice,
data or fax call. If the waiting call is a data or fax call, it is also possible to put the voice call on hold. To switch
back from the active data or fax call to the held voice call the active call must be terminated with AT+CHLD=1.
If all active and held calls are voice calls it is possible to switch back and forth with AT+CHLD=2.
• In conflict situations, e.g. when a waiting call comes while there are already held calls, the above procedures
apply to the waiting call only. For example, <n>=0 rejects the waiting call, but does not affect the held calls.
• See also the AT+CCWA command for details on how to display waiting calls.
Example
^SYSSTART
at+cpin="9999"
OK
+CREG: 2
+CREG: 1,"0145","0016"
The mobile is now registered.
at+ccwa=1,1,1
You activate the indication of waiting calls during
voice calls.
OK
atd"1234567";
You make a voice call.
OK
+CCWA: "+491791292364",145,32,,0
You receive a URC indicating a waiting data call.
at+chld=2
You put the voice call on hold.
CONNECT 9600/RLP
The data connection is set up.
hello
+++
With ''+++'' you go in command mode.
OK
at+clcc
You interrogate the status of all established calls.
+CLCC: 1,0,1,0,0,"03038639268",129
+CLCC: 2,1,0,1,0,"+491791292364",145
OK
at+chld=1
The active data call is terminated and the held voice
call becomes active.
OK
at+clcc
+CLCC: 1,0,0,0,0,"03038639268",129
OK
MC55i AT Command Set
9.9 AT+CLIP s
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9.9 AT+CLIP Calling Line Identification Presentation
This command refers to the GSM supplementary service CLIP (Calling Line Identification Presentation) that
enables a called subscriber to get the calling line identity (CLI) of the calling party when receiving a mobile ter-
minated call.
The AT+CLIP write command enables or disables the presentation of the CLI at the TE. It has no effect on the
execution of the supplementary service CLIP in the network.
The AT+CLIP read command gives the status of <n>, and also triggers an interrogation of the provision status
of the CLIP service according to GSM 02.81 (given in <m>). If no SIM card is available or the SIM-PIN is not
entered, the command response is "ERROR".
Syntax
Unsolicited Result Codes
URC 1
Voice call response format:
+CLIP: <number>, <type>[, , [, [<alpha>][, <CLI validity>]]]
URC 2
Data/FAX call response format:
+CLIP: <number>, <type>
When CLIP is enabled at the TE (and is permitted by the calling subscriber), this URC is delivered after every
"RING" or "+CRING" URC when a mobile terminated call occurs.
Parameter Description
[0](&F) Suppress unsolicited result codes
1 Display unsolicited result codes
Test Command
AT+CLIP=?
Response(s)
+CLIP: (list of supported<n>s)
OK
Read Command
AT+CLIP?
Response(s)
+CLIP: <n>, <m>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CLIP=<n>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.81 ± + + + + + - - -
<n>(num)(&W)(&V)
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0 CLIP not provisioned
1 CLIP provisioned
2 Unknown
String type phone number of calling address in format specified by <type>.
Type of address octet in integer format; 145 when dialing string includes international access code character
"+",128 when number is restricted otherwise 129.
String type alphanumeric representation of <number> corresponding to the entry found in phonebook; used
character set is the one selected with AT+CSCS.
0 CLI valid
1 CLI has been withheld by the originator.
2 CLI is not available due to interworking problems or limitations of originating
network. <number> shall be an empty string ("") and <type> value will not be
significant.
When CLI is not available ( <CLI validity>=2), <number> shall be an empty string ("") and <type> value
will not be significant. Nevertheless, TA shall return the recommended value 128 for <type> (TON/NPI
unknown in accordance with GSM 04.08 subclause 10.5.4.7).
When CLI has been withheld by the originator, (<CLI validity>=1) and the CLIP is provisioned with the
"override category" option (refer GSM 02.81 and GSM 03.81), <number> and <type> is provided. Otherwise,
TA shall return the same setting for <number> and <type> as if the CLI was not available.
<m>(num)(&V)
<number>(str)
<type>(num)
<alpha>(str)
<CLI validity>(num)
MC55i AT Command Set
9.10 AT+CLIR s
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9.10 AT+CLIR Calling Line Identification Restriction
The AT+CLIR command refers to the GSM supplementary service CLIR (Calling Line Identification Restriction).
Syntax
Parameter Description
Parameter shows the settings for outgoing calls:
[0](P) Presentation indicator is used according to the subscription of the CLIR service
1 CLIR invocation
2 CLIR suppression
Parameter shows the subscriber CLIR service status in the network:
0 CLIR not provisioned
1 CLIR provisioned in permanent mode
2 Unknown (e.g. no network, etc.)
3 CLIR temporary mode presentation restricted
4 CLIR temporary mode presentation allowed
Note
• The settings made with AT+CLIR=1 or AT+CLIR=2 are used for all outgoing calls until the ME is switched off
or AT+CLIR=0 is used.
Test Command
AT+CLIR=?
Response(s)
+CLIR: (list of supported <n>s)
OK
Read Command
AT+CLIR?
Response(s)
+CLIR<n>, <m>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CLIR=[<n>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<n>(num)
<m>(num)
MC55i AT Command Set
9.11 AT+COLP s
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9.11 AT+COLP Connected Line Identification Presentation
This command refers to the GSM supplementary service COLP (Connected Line Identification Presentation) that
enables a calling subscriber to get the connected line identity (COL) of the called party after setting up a mobile
originated call. The command enables or disables the presentation of the COL at the TE. It has no effect on the
execution of the supplementary service COLR in the network.
Syntax
Unsolicited Result Code
Call response format:
+COLP: <number>, <type>
Parameter Description
0 Disable - suppress unsolicited result codes
1 Enable - display unsolicited result codes
0 COLP not provisioned (no presentation)
1 COLP provisioned
2 Unknown
String type phone number of connected address in format specified by <type>
Test Command
AT+COLP=?
Response(s)
+COLP:(list of supported <n>s)
OK
Read Command
AT+COLP?
Response(s)
+COLP: <n>, <m>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+COLP=[<n>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<n>(num)
<m>(num)
<number>(str)
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Type of address octet in integer format; 145 when dialling string includes international access code character
"+", otherwise 129.
<type>(num)
MC55i AT Command Set
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9.12 AT+CPUC Price per unit and currency table
Syntax
Command Description
Read command returns the current parameters of PUC.
Write command sets the parameters of Advice of Charge related price per unit and currency table. SIM PIN2 is
usually required to set the parameters.
Parameter Description
Three-character currency code (e.g. "GBP", "EUR"). If the currency name is longer than three characters, all
characters will be cut off after the third position. Before they are written to the SIM Card, these characters are
converted to the standard GSM alphabet.
Price per unit; dot is used as a decimal separator (e.g. "2.66"). The length is limited to 20 characters. If the string
length is exceeded, the command is terminated with an error. This string may only contain digits and a dot. Lead-
ing zeros are removed from the string. The minimum and maximum value are determined by the structure of the
SIM-PUCT file. The maximum price per unit value is 999 999 999.00. When successfully entered, this value is
rounded to maximum accuracy.
Note: Due to storage in mantisse (range 0-4095) and exponent (-7 to 7) it is possible that rounding errors occur.
SIM PIN2. String parameter which can contain any combination of characters. The maximum string length is
limited to 8 characters. If this value is exceeded, the command terminates with an error message. If the PIN2 is
incorrect, a CME error (+CME ERROR: incorrect password) is output.
Test Command
AT+CPUC=?
Response(s)
OK
Read Command
AT+CPUC?
Response(s)
+CPUC: <currency>, <ppu>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CPUC=<currency>, <ppu>[, <passwd>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<currency>(str)(+CSCS)
<ppu>(str)
<passwd>(str)
MC55i AT Command Set
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Example
To change currency and/or price per unit you have two ways:
You can enter PIN2 along with the AT+CPUC command:
Alternatively, you can first use the AT+CPIN2 command to enter PIN2. When you execute the AT+CPUC com-
mand, subsequently, take into account that PIN2 authentication expires after 300ms (see notes in AT+CPIN2).
AT+CPUC="EUR","0.10","8888"
(where "8888" = PIN2)
OK
AT+CPUC="EUR","0.10"
OK
Successful
AT+CPUC="EUR","0.10"
+CME ERROR: SIM PIN2 required
Attempt not successful. PIN2 authentication has
expired.
MC55i AT Command Set
9.13 AT+CSSN s
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9.13 AT+CSSN Supplementary service notifications
Syntax
Unsolicited Result Codes
URC 1
+CSSI: <code 1>
When <n>=1 and a supplementary service notification is received after a mobile originated call setup, inter-
mediate result code "+CSSI: <code 1>" is sent to TE before any other MO call setup result codes
URC 2
+CSSU: <code 2>
When <m>=1 and a supplementary service notification is received during a mobile terminated call setup or
during a call, unsolicited result code "+CSSU: <code 2>" is sent to TE.
Command Description
The write command enables or disables the presentation of URCs for supplementary services.
Parameter Description
0(&F) Suppress "+CSSI" URCs
1 Activate "+CSSI" URCs
0(&F) Suppress "+CSSU" URCs
1 Activate "+CSSU" URCs
Test Command
AT+CSSN=?
Response(s)
+CSSN: (list of supported<n>s), (list of supported<m>s)
OK
Read Command
AT+CSSN?
Response(s)
+CSSN: <n>, <m>
OK
Write Command
AT+CSSN=<n>[, <m>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<n>(num)
<m>(num)
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0 unconditional call forwarding is active
1 some of the conditional call forwardings are active
2 call has been forwarded
3 Waiting call is pending
0 The incoming call is a forwarded call.
5 Held call was terminated by other party
10 additional incoming call forwarded
Note
• URCs will be displayed only if the call concerned is a voice call, but some URCs will be displayed as well as
for data calls (like "+CSSU"=0).
<code 1>(num)
<code 2>(num)
MC55i AT Command Set
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9.14 AT+CUSD Unstructured supplementary service data
AT+CUSD allows control of the Unstructured Supplementary Service Data (USSD) according to GSM 02.90. Both
network and mobile initiated operations are supported. The interaction of this command with other commands
based on other GSM supplementary services is described in the GSM standard.
Parameter <n> is used to disable/enable the presentation of an unsolicited result code (USSD response from
the network, or network initiated operation) "+CUSD: <m>[<str_urc>[<dcs>]]" to the TE.
When parameter <str_write> is given, a mobile initiated USSD string or a response USSD string to a network
initiated operation is sent to the network. The response USSD string from the network is returned in a subsequent
unsolicited result code "+CUSD"
Syntax
Unsolicited Result Code
+CUSD: <m>[<str_urc>[<dcs>]]
URC "+CUSD" indicates an USSD response from the network, or network initiated operation
Parameter Description
0(&F) Disable the result code presentation in the TA
1 Enable the result code presentation in the TA
2 Cancel session (not applicable to read command response)
String type USSD-string (when <str_write> parameter is not given, network is not interrogated).
For the write command, only <dcs>= 15 is supported.
Test Command
AT+CUSD=?
Response(s)
+CUSD: (list of supported<n>s)
OK
Read Command
AT+CUSD?
Response(s)
+CUSD: <n>
OK
Write Command
AT+CUSD=<n>[, <str_write>[, <dcs>]]
Response(s)
OK
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 02.90, GSM 03.90,
GSM 04.90
+ + + + + + - - -
<n>(num)
<str_write>(str)
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String type USSD-string .
If <dcs> indicates that GSM 03.38 default alphabet is used TA converts GSM alphabet into current TE character
set according to rules of GSM 07.05 Annex A. Otherwise in case of invalid or omitted <dcs> conversion of
<str_urc> is not possible.
GSM 03.38 Cell Broadcast Data Coding Scheme in integer format (default 15). In case of an invalid or omitted
<dcs> from the network side (MT) <dcs> will not be given out.
0 No further user action required (network initiated USSD-Notify, or no further
information needed after mobile initiated operation)
1 Further user action required (network initiated USSD-Request, or further infor-
mation needed after mobile initiated operation).
If <m>=1, then the URC ends with ">" to prompt the user for input. The user
action is finished with <CTRL-Z> or aborted with <ESC>.
2 USSD terminated by network.
Notes
• When a USSD string is sent via ATD, a "AT+CUSD=1" is executed implicitly.
• It is recommended to finalize or escape a pending USSD user interaction before further actions are done to
prevent blocking situations.
• If a network initiated operation is left unanswered, several error codes may be output. The first error code is
given when the AT command is timed out. Other network indications may follow, depending on the network.
<str_urc>(str)(+CSCS)
<dcs>(num)
<m>(num)
MC55i AT Command Set
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10. Internet Service Commands
MC55i has an embedded TCP/IP stack that is driven by AT commands and enables the host application to easily
access the Internet. The advantage of this solution is that it eliminates the need for the application manufacturer
to implement own TCP/IP and PPP stacks, thus minimizing cost and time to integrate Internet connectivity into
a new or existing host application. This chapter is a reference guide to all the AT commands and responses
defined for use with the TCP/IP stack.
Access is provided to the following Internet Services:
1. Socket Client and Server for TCP, Client for UDP
2. FTP Client
3. HTTP Client
4. SMTP Client
5. POP3 Client
Two design strategies for using Internet Service AT commands - URC mode or polling mode:
The MC55i offers two modes of controlling an Internet session opened with AT^SISO. To select the mode that
best suits the preferences of your application design use the AT^SCFG command, parameter "Tcp/WithURCs"
(refer to <tcpWithUrc>).
• URC mode (delivery default):
The progress of an Internet session is URC driven. The URCs notify the host whether data can be sent or
received, whether data transfer has completed, whether the service can be closed or whether an error has
occurred. This mechanism eliminates the need to poll the service until the necessary progress information is
received.
To enable the URC mode select: AT^SCFG="Tcp/WithURCs",on.
• Polling mode:
In polling mode, the presentation of URCs related to the Internet Services is disabled. The host is responsible
to retrieve all the status information needed for controlling the Internet session. This is done by polling, where
the host application keeps sending the commands AT^SISR, AT^SISW, AT^SISI.
To enable the polling mode select: AT^SCFG="Tcp/WithURCs",off.
The disabled URCs are the following: "^SISR" URC, "^SISW" URC and "^SIS" URC for parameter <urc-
Cause>=0 (Internet service events), but not for <urcCause>=1 or 2 (needed for Socket listener and always
enabled).
Step-by-step overview of how to configure and use TCP/IP communications with MC55i:
• Select URC mode or polling mode as described above.
• First of all, create a CSD or GPRS connection profile with AT^SICS. The connection profile is a set of basic
parameters which determines the type of connection to use for an Internet service. The connection type is
also referred to as bearer. Up to 6 connection profiles can be defined, each identified by the <conPro-
fileId>.
• Secondly, use AT^SISS to create a service profile based on one of the connection profiles. Up to 10 service
profiles can be defined, each identified by the <srvProfileId>. The service profile specifies the type of
Internet service to use, i.e. Socket, FTP, HTTP, or one of the email services SMTP or POP3. To assign a
connection profile to a service profile, the <conProfileId> of AT^SICS must be entered as "conId" value
of the AT^SISS parameter <srvParmTag>.
This offers great flexibility to combine connection profiles and service profiles. For example, you may have
one connection profile (CSD or GPRS) specified with AT^SICS which can be associated with an SMTP ser-
vice profile for sending emails and a POP3 service profile for retrieving emails.
• Once the connection profile and the service profile are created, an Internet session can be opened by entering
the AT^SISO write command and the desired <srvProfileId>.
In URC mode, the "^SISR" or "^SISW" URC indicates whether the service is ready to receive or send data.
This means, that the AT^SISR or AT^SISW command shall be entered after the URC was received. If an error
occurs the "^SIS" URC is delivered instead.
In polling mode, you can enter the AT^SISR or AT^SISW command straight after AT^SISO though you may
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need to do so several times until the service confirms that data can be sent or received.
• The first parameter of the AT^SISR or AT^SISW commands is always the <srvProfileId>, the second
parameter is the number of bytes which the host either wants to send to or is able to receive from the module.
The way the module handles the data transfer follows the rules of the ordinary socket interface and is aware
that a host may be limited by its input buffer size. The maximum data size supported by MC55i is 1500 bytes
in both directions (read or write). To send or receive more than 1500 bytes, the read or write action shall be
repeated until the data transfer has completed. Each read or write action requires that the command response
(of AT^SISR or AT^SISW) confirms that the service is ready to send or receive data.
To end an upload data stream set the <eodFlag> in the last AT^SISW command.
•The AT^SISI command shall be used to monitor the progress of the session. The command reports the ser-
vice state of the used service profile and indicates the number of bytes received, the number of bytes sent
and, in the case of sending, the number of bytes acknowledged or unacknowledged at TCP layer.
• If an error occurs during a session you can enter the AT^SISE command and the <srvProfileId> to iden-
tify the reason. This is especially important in polling mode.
•The AT^SICI command can be used any time to query the current status of one or all connection profile(s).
• Finally, to end a session, enter the AT^SISC write command and the <srvProfileId>.
Maximum number of profiles defined / used:
• Up to 6 connection profiles can be created (with AT^SICS).
• Up to 10 service profiles can be created (with AT^SISS), but the number of parallel profiles of the same ser-
vice type is limited as listed below. If the maximum number of a service profile type is already defined, any
attempt to set up another profile for the same type will be denied with "+CME ERROR: operation of service
temporary not allowed".
- Maximum 3 HTTP profiles
- Maximum 6 socket profiles: The socket service can accept an incoming connection only when at least one
service profile is still free (not yet created with AT^SISS), otherwise the incoming connection will be
rejected from the listener.
- 1 FTP profile
-1 POP3 profile
- 1 SMTP profile
• The TCP/IP stack of MC55i supports one service profile at a time. Trying to run more than one service profile
may result in a blocking of one of these service profiles.
Using Internet Service AT commands on several interfaces (ASC0, ASC1 or Multiplex mode on ASC0):
• A connection profile can be created on one interface and then viewed or changed on all other interfaces.
• A service profile can be used only on one interface at a time:
- Service profiles can only be opened on the interface where they have been defined with AT^SISS.
- Accordingly, on each interface the read commands AT^SISO? and AT^SISI? deliver full status informa-
tion for the service profiles configured / opened on this interface, while service profiles related to other
interfaces are only listed by <srvProfileId> and service type name (= <srvParmTag> value "srv-
Type") without any status parameters.
- Changes to a service profile are allowed only on the same interface where it was created, trying to change
it on another interface is denied with "+CME ERROR: Invalid index". If queried with the read command
AT^SISS? the entire profile is returned on the interface where the service profile was created, while on all
other interfaces only the service type of the profile is stated.
- To free a service profile for use on another interface, use the AT^SISS command and select service type
= "none". This action deletes the entire profile and restores all parameters of the profile to their initial
power-up state (all values are empty). For example, to remove the service profile 3, set AT^SISS=3,srv-
Type,none. After this, a new profile 3 can be created on any other interface.
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Address notation
Server addresses must be provided as IP addresses in standard dot-format (e.g. "192.168.1.2") or as server
address names resolvable by a DNS server (e.g. "smtp.myserver.de" or "pop3.myserver.de").
Timeouts
Timeouts are not part of the Internet AT command functionality implemented in MC55i and, if desired, are the
responsibility of the host application. It is recommended that the host application validates URCs and AT com-
mand responses and reacts adequately, for example by sending a close message or starting a timer.
Socket service used with UDP protocol
The significant differences between the TCP and UDP protocols imply that UDP sometimes requires particular
procedures or even specific parameters. Details on how to handle UDP services can be found in extra notes or
are included in the general parameter descriptions.
Using the DCD line to detect the connection status of Internet services
With AT&C you can configure the DCD line of the used serial interface to indicate whether an Internet service is
active. For Socket, HTTP, SMTP and POP3 the states "Up" or "Connecting" are indicated, for FTP only the state
"Up".
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10.1 AT^SICS Internet Connection Setup Profile
AT^SICS serves to create and edit Internet connection profiles. A connection profile can be assigned to one or
more service profiles defined with AT^SISS, and thus, determines which type of connection is to be established
when opening a service profile with AT^SISO.
The AT^SICS read command requests the current settings of all Internet connection profiles. One line is issued
for every possible parameter of a given <conParmTag> "conType" value.
The AT^SICS write command specifies all parameters of a connection profile identified by <conProfileId>.
At first the type of Internet connection needs to be selected via <conParmTag> value "conType". This deter-
mines the applicability of all other <conParmTag> values related to this "conType" and automatically sets their
defaults. An exception is the <conParmValue-alphabet> which can be set before or after selecting "con-
Type".
To change the settings the write command needs to be executed for each single <conParmTag>. All profile
parameters set with AT^SICS are volatile.
MC55i supports the authentication methods PAP (Password Authentication Protocol), CHAP (Handshake
Authentication Protocol) or none. The method actually used for an Internet connection via CSD or GPRS is nego-
tiated at the LCP layer, i.e. it is negotiated with the remote peer at connection setup.
Table 10.1: Applicability of AT^SICS <conParmTag> values
Syntax
<conParmTag> value CSD GPRS0
"conType" mandatory mandatory
"user" optional optional
"passwd" optional optional
"apn" ø mandatory
"inactTO" optional optional
"calledNum" mandatory ø
"dataType" mandatory ø
"dns1" optional optional
"dns2" optional optional
"alphabet" optional optional
Test Command
AT^SICS=?
Response(s)
OK
Read Command
AT^SICS?
Response(s)
^SICS: <conProfileId>, <conParmTag>, <conParmValue>
OK
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Parameter Description
0...5 Internet connection profile identifier.
The <conProfileId> identifies all parameters of a connection profile, and,
when a service profile is created with AT^SISS the <conProfileId> needs
to be set as "conId" value of the AT^SISS parameter <srvParmTag>.
Internet connection parameter.
“conType“ Type of Internet connection.
For supported values of <conParmValue> refer to <conParmValue-con-
Type>.
“alphabet“ Selects the character set for input and output of string parameters within a pro-
file.
The selected value is bound to the specific profile. This means that different
profiles may use different alphabets. Unlike other parameters the alphabet can
be changed no matter whether the <conParmTag> value "conType" has been
set.
For supported values of <conParmValue> refer to <conParmValue-
alphabet>.
“user“ User name string: maximum 32 characters (where "" is default).
“passwd“ Password string: maximum 32 characters (where ***** is default).
“apn“ Access point name string value: maximum 100 characters (where "" is default).
“inactTO“ Inactivity timeout value in seconds: 0 ... 216-1, default = 20
Number of seconds the bearer remains open although the service no longer
needs the bearer connection.
Do not set the timeout value below 3 sec. This may result in problems when
using the <eodFlag> (set in the last AT^SISW command to terminate an
upload data stream).
“calledNum“ Called BCD number.
“dataType“ Data call type.
For supported values of <conParmValue> refer to <conParmValue-
dataType>.
“dns1“ Primary DNS server address (IP address in dotted-four-byte format).
This value determines whether to use the DNS server addresses dynamically
assigned by the network or a specific DNS server address given by the user.
"dns1" = "0.0.0.0" (default) means that the CSD or GPRS connection profile
uses dynamic DNS assignment. Any other address means that the Primary
DNS is manually set.
The default value applies automatically if no other address is set. Note that the
Write Command
AT^SICS=<conProfileId>, <conParmTag>, <conParmValue>
Response(s)
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<conProfileId>(num)
<conParmTag>(str)
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AT^SICS read command only returns a manually configured IP address, while
the value "0.0.0.0" is not indicated at all, no matter whether assumed by default
or explicitly specified.
See also note below.
“dns2“ Secondary DNS server address (IP address in dotted-four-byte format).
If "dns1" = "0.0.0.0" this setting will be ignored. Otherwise this value can be
used to manually configure an alternate server for the DNS1.
If "dns1" is not equal "0.0.0.0" and no "dns2" address is given, then
"dns2"="0.0.0.0" will be assumed automatically. The AT^SICS read command
only returns a manually configured IP address, while the value "0.0.0.0" is not
indicated at all, no matter whether assumed by default or explicitly specified.
Parameter value; type and supported content depend on related <conParmTag>.
Supported connection type values in <conParmValue> for <conParmTag> value "conType".
“CSD“ Circuit-switched data call.
“GPRS0“ GPRS connection.
Settings of GPRS related commands are not used, e.g. AT+CGDCONT. When a
service based on a GPRS connection profile is started after entering AT^SISO
MC55i automatically tries to attach to the GPRS. Yet, the only exception is
AT+CGATT which can be used any time to detach from the GPRS and, and thus
disconnect the bearer opened with AT^SISO.
“none“ Clears the connection profile.
Character set selectable with <conParmValue> for <conParmTag> value "alphabet".
[“0“] Character set determined with AT+CSCS applies.
“1“ International Reference Alphabet (IRA, seven bit ASCII) applies.
Supported data call type values in <conParmValue> for <conParmTag> value "dataType".
“0“ ISDN
[“1“] Analog
Notes
• Before opening a service profile based on a connection profile recently used, check with AT^SICI that the
previous connection was properly closed. If AT^SICI confirms that the connection profile is in <conState>
0 (Down) the connection profile may be used again.
• If a GPRS network does not support or is not correctly configured for automatic DNS address assignment the
TCP/IP stack cannot resolve fully qualified domain names. In this case, a warning message will be returned
when trying to open an Internet service configured for automatic DNS address assignment.
10.1.1 Example: Default values of a CSD connection profile
As stated earlier, the "conType" selected with AT^SICS determines all other matching profile parameters related
to this "conType". Once "conType" is set in a new profile, the default values of all other related parameters are
assumed. To view the default settings you can use the read command AT^SICS?.
<conParmValue>(str)
<conParmValue-conType>(str)
<conParmValue-alphabet>(str)
<conParmValue-dataType>(str)
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10.1.2 Example: GPRS connection profile
at^sics=1,conType,CSD
Select connection type CSD, identified by <con-
ProfileId>1
OK
at^sics?
Query current profiles.
^SICS: 0, "conType", ""
Profile with <conProfileId> 0 is still empty.
^SICS: 1, "conType", "CSD"
The new CSD profile just created is indicated with all
related parameters set to their default.
^SICS: 1, "alphabet", "0"
Character set determined with AT+CSCS applies
when string parameters are input with AT^SICS.
^SICS: 1, "user", ""
No user name set.
^SICS: 1, "passwd", "*****"
Password masked with asteriks.
^SICS: 1, "inactTO", "20"
Inactivity timeout = 20s.
^SICS: 1, "calledNum", ""
No destination set.
^SICS: 1, "dataType", "1"
Remote device is analog, e.g. an analog modem.
^SICS: 2, "conType", ""
Profile with <conProfileId> 2 is still empty.
^SICS: 3, "conType", ""
Profile with <conProfileId> 3 is still empty.
^SICS: 4, "conType", ""
Profile with <conProfileId> 4 is still empty.
^SICS: 5, "conType", ""
Profile with <conProfileId> 5 is still empty.
OK
at^sics=0,conType,GPRS0
Select connection type GPRS0.
OK
AT^SICS=0,"inactTO", "20"
Inactivity timeout = 20s.
OK
AT^SICS=0,dns1,"193.254.160.1"
IP address of Primary DNS server.
OK
AT^SICS=0,passwd,t-d1
Password for GPRS services provided by the Ger-
man operator T-D1.
OK
AT^SICS=0,apn,"internet.t-d1.de"
APN to access the GPRS services provided by the
German operator T-D1.
OK
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10.2 AT^SICI Internet Connection Information
The AT^SICI read command requests the current status of the Internet connection profiles currently defined
with AT^SICS.
The AT^SICI write command displays the status of the specified Internet connection profile. If the connection
profile is not defined yet, the command returns a "+CME ERROR" response.
Syntax
Parameter Description
Internet connection profile identifier as defined by AT^SICS (<conProfileId>).
0...5
State of the Internet connection profile.
0 Down - Internet connection is defined but not connected.
1 Connecting - A service has been opened and so the Internet connection is ini-
tated.
2 Up - Internet connection is established and usable by one or more services.
3 Limited Up - Internet connection is established, but temporarily no network cov-
erage.
This state applies only to GPRS profiles (it does not occur with CSD).
4 Closing - Internet connection is terminating.
Test Command
AT^SICI=?
Response(s)
[^SICI:(list of defined <conProfileId>s)]
OK
Read Command
AT^SICI?
Response(s)
[^SICI: <conProfileId>, <conState>, <numServices>, <conAddr>]
[^SICI: ...]
OK
Write Command
AT^SICI=<conProfileId>
Response(s)
^SICI: <conProfileId>, <conState>, <numServices>, <conAddr>
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<conProfileId>(num)
<conState>(num)
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Number of services using this Internet connection profile.
0...9
Local IP address of the Internet connection profile (empty if no address is associated yet).
Note
• Before opening a service profile based on a connection profile recently used, check with AT^SICI that the
previous connection was properly closed. If AT^SICI confirms that the connection profile is in <conState>
0 (Down) the connection profile may be used again.
10.2.1 Checking Connection Profile Status
Assume the network connection is temporarily not available. (If URC presentation mode of network registration
is enabled the state is shown by the URC "+CREG: 2").
The network connection is temporarily not available but the Internet connection is still established, so the host
may decide to stop the data transfer to minimize the risk of losing data due to memory limitations.
After closing the service with AT^SISC:
<numServices>(num)
<conAddr>(str)
at^sici?
Query the current status of the connection profile.
^SICI: 1,2,1,"10.10.0.161"
One connection profile has been created at <con-
ProfileId>=1, and one service is opened using
this connection profile. The Internet connection is in
<conState>=2 ("Up").
OK
at^sici?
Query once again the current status of the connec-
tion profile.
^SICI: 1,3,1,"10.10.0.161"
Parameter <conState> has changed to state "Lim-
ited up".
OK
at^sici?
Query once again the current status of the connec-
tion profile.
^SICI: 1,2,1,"10.10.0.161"
After re-establishing the network connection, <con-
State> reverts to state "Up".
OK
at^sici?
Query once again the current status of the connec-
tion profile.
^SICI: 1,2,0,"10.10.0.161"
Parameter <numServices> has decreased. The
bearer is still open because the service was closed
before expiry of the inactivity timeout "inactTO" of
AT^SICS.
OK
at^sici?
Query again the current status.
^SICI: 1,0,0,"0.0.0.0"
The inactivity timeout "inactTO" of AT^SICS has
expired, therefore the bearer is closed now.
OK
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10.3 AT^SISS Internet Service Setup Profile
AT^SISS serves to set up the necessary parameters in the Internet service profiles. Any service profile can then
be used to control a data link in conjunction with AT^SISI, AT^SISO, AT^SISC, AT^SISR, AT^SISW and
AT^SISE.
The AT^SISS read command requests the current settings of all Internet service profiles. One line is issued for
every possible parameter of a given <srvParmTag> "srvType" value.
The AT^SISS write command specifies the parameters for a service profile identified by <srvProfileId>. At
first the type of Internet service needs to be selected via <srvParmTag> value "srvType". This determines the
applicability of all other <srvParmTag> values related to this "srvType" and sets their defaults. Changing the
<srvParmTag> "srvType" of an existing service profile will reset all <srvParmTag> default values to suit the
new "srvType". An exception is the <srvParmValue-alphabet> which can be set before or after selecting
"srvType" and is not reset when "srvType" changes.
To change the settings the write command needs to be executed for each single <srvParmTag>. All profile
parameters set with AT^SISS are volatile.
The list below shows which <srvParmTag> parameters apply to each Internet service and which of them are
mandatory or optional.
Table 10.2: Applicability of AT^SISS <srvParmTag> values
<srvParmTag> Mandatory or optional
Socket service
"srvType" mandatory
"conId" mandatory
"alphabet" optional
"address" mandatory
"tcpMR" optional
"tcpOT" optional
FTP service
"srvType" mandatory
"conId" mandatory
"alphabet" optional
"address" mandatory
"tcpMR" optional
"tcpOT" optional
HTTP service
"srvType" mandatory
"conId" mandatory
"alphabet" optional
"address" mandatory
"user" optional
"password" optional
"hcContent" optional
"hcContLen" optional
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"hcUserAgent" optional
"hcMethod" mandatory
"hcProp" optional
"hcRedir" optional
"hcAuth" optional
"tcpMR" optional
"tcpOT" optional
SMTP service
"srvType" mandatory
"conId" mandatory
"alphabet" optional
"address" mandatory
"user" optional
"password" optional
"tcpPort" optional
"smFrom" mandatory
"smRcpt" mandatory
"smCC" optional
"smSubj" optional
"smHdr" optional
"smAuth" optional
"tcpMR" optional
"tcpOT" optional
POP3 service
"srvType" mandatory
"conId" mandatory
"alphabet" optional
"address" mandatory
"user" mandatory
"password" mandatory
"tcpPort" optional
"pCmd" mandatory
"pNumber" optional
"pLength" optional
"pDelFlag" optional
"tcpMR" optional
"tcpOT" optional
<srvParmTag> Mandatory or optional
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Syntax
Parameter Description
Internet service profile identifier.
The <srvProfileId> is used to reference all parameters related to the same service profile. Furthermore,
when using the AT commands AT^SISO, AT^SISR, AT^SISW and AT^SISC the <srvProfileId> is needed
to select a specific service profile.
0...9
Internet service profile parameter.
srvType Type of Internet service to be configured with consecutive usage of AT^SISS.
For supported values of <srvParmValue> refer to <srvParmValue-srv-
Type>.
alphabet Selects the character set for input and output of string parameters within a pro-
file.
The selected value is bound to the specific profile. This means that different
profiles may use different alphabets. Unlike other parameters the alphabet can
be changed no matter whether the <srvParmTag> value "srvType" has been
set.
For supported values of <srvParmValue> refer to <srvParmValue-
alphabet>.
user User name string
1. Socket
Not applicable.
2. FTP
Not applicable; set within "address" parameter.
3. HTTP
Length: 2 ... 31
User name for the HTTP authentication mechanism. Currently only HTTP
simple authentication is supported.
Test Command
AT^SISS=?
Response(s)
OK
Read Command
AT^SISS?
Response(s)
^SISS: <srvProfileId>, <srvParmTag>, <srvParmValue>
OK
Write Command
AT^SISS=<srvProfileId>, <srvParmTag>, <srvParmValue>
Response(s)
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<srvProfileId>(num)
<srvParmTag>
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4. SMTP
User name to be used for SMTP authentication (string).
Length: 4 ... 64.
If SMTP authentication is disabled, i.e. "smAuth" flag not set, user name
parameter will be ignored.
5. POP3
User name identifying a mailbox, i.e. mailbox name (string).
Length: 1 ... 64.
passwd Password string
1. Socket
Not applicable.
2. FTP
Not applicable; set within "address" parameter.
3. HTTP
Length: 2 ... 31
Password for the HTTP authentication mechanism. Currently HTTP simple
authentication is supported only.
4. SMTP
Password to be used for SMTP authentication (string).
Length: 4 ... 64.
If SMTP authentication is disabled, i.e. "smAuth" flag not set, password
parameter will be ignored.
5. POP3
Server/mailbox-specific password (string).
Length: 1 ... 64.
Used to perform authentication with a POP3 server.
conId Internet connection profile to be used, for details refer AT^SICS.
tcpPort TCP Port Number
1. Socket
Not applicable; set within "address" parameter.
2. FTP
Not applicable; set within "address" parameter.
3. HTTP
Not applicable; set within "address" parameter.
If parameter is omitted the service connects to HTTP default port 80.
4. SMTP
SMTP server TCP port number (numeric)
Length: 0 ... 216-1
If this parameter is not set, SMTP default port number 25 is used.
5. POP3
POP3 server TCP port number (numeric)
Length: 0 ... 216-1
If this parameter is not set, POP3 default port number 110 is used.
address String value, depending on the service type either a URL in the case of Socket,
FTP and HTTP or an address in the case of SMTP and POP3:
1. Socket
- Socket type TCP client URL
"socktcp://'host':'remote tcpPort'
- Socket type TCP server URL
"socktcp://listener:'local tcpPort' "
- Socket type UDP client URL
"sockudp://'host':'remote udpPort'[;size='byte'][;port='word']"
Parameter "size" (optional):
0: PDU size is variable (default).
1 ... 1460: Fixed PDU size in bytes.
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Parameter "port" (optional):
0: Port number will be assigned from service (default).
1 ... 216-1: defines the local port number for the UDP client.
2. FTP
- FTP client URL (get)
"ftp://'user':'password'@'host':'tcpPort'/'url-path' [;type='a|i|d'] "
Refer to "IETF-RFC 1738".
- FTP client URL (put)
"ftpput://'user':'password'@'host':'tcpPort'/'url-path'/'element name'
[;type='a|i'][;mode='u|a|d'] "
Used parameters:
"host" is mandatory, all other parameters are optional.
If "password" is set then "user" must be set as well.
If "user" is omitted the string "anonymous" is selected for "user" and "pass-
word".
If "password" is omitted the password request is served by an empty string.
If "tcpPort" is omitted the service connects to the FTP default port 21.
If "url-path" contains only the IP address a directory listing is requested.
If "url-path" contains the IP address and has a slash '/' appended a detailed
directory listing is requested.
"type": [a)scii | i)mage | d)irectory]
"mode": [u)nique | a)ppend | d)elete]
"u)nique" selects the FTP Store Unique command to create a file name
unique to the current directory. If the file name is assigned by the server
then the "^SIS" URC will appear, indicating <urcInfoId> 2100 and the
file name.
"d)elete" clears given 'element name'.
If "mode" is omitted "replace mode" is default setting.
3. HTTP
HTTP client URL
Length: 6 ... 255
"http://'server'/'path':'tcpPort' "
"server": FQDN or IP-address
"path": path of file or directory
"tcpPort": If parameter is omitted the service connects to HTTP default port
80.
Refer to "IETF-RFC 2616".
4. SMTP SMTP server address (string).
Length: 4 ... 256.
5. POP3 POP3 server address (string).
Length: 4 ... 256.
hcContent Optional parameter for HTTP method "Post".
Length: 0 ... 127
Can be used to transfer a small amount of data. The content of this string will
only be sent if "hcContLen" = 0. The maximum length of "hcContent" is 127
bytes.
To transmit a larger amount of data "hcContLen" must be set to a non-zero
value. In this case the "hcContent" string will be ignored, and data transmission
from the client to the server is done with AT^SISW.
hcContLen Mandatory parameter for HTTP method "Post".
Length: 0 ... 231-1
The content length shall be set in the header of the HTTP "Post" request before
the data part is transferred.
If "hcContLen" = 0 then the data given in the "hcContent" string will be posted.
If "hcContLen" > 0 then the AT^SISW command will be used to send data from
the client to the server. In this case, "hcContLen" specifies the total amount of
data to be sent. The data can be sent in one or several parts. For each part,
the transmission is triggered by the URC "^SISW: x, 1", then the AT^SISW write
command can be executed. After the exact number of bytes are transferred via
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the serial interface, the HTTP client will go from service state "Up" to service
state "Closing" (see parameters <srvState> and <srvState> for detail).
Finally, the URC "^SISW: x, 2" indicates that all data have been transferred and
the service can be closed with AT^SISC.
hcUsrAgent The user agent string must be set by the application to identify the mobile. Usu-
ally operation system and software version info is set with this browser identi-
fier.
Length: 0 ... 63
hcMethod HTTP method specification: 0=GET, 1=POST, 2=HEAD.
hcProp Parameter for several HTTP settings.
Length: 0 ... 127
The general format is 'key': <space> 'value' "\0d\0a".
Multiple settings can be given separated by "\0d\0a" sequences within the
string.
Possible 'key' values are defined at HTTP/1.1 Standard RFC 2616.
hcRedir This flag controls the redirection mechanism of the MC55i acting as HTTP cli-
ent (numeric).
If "hcRedir" = 0: No redirection.
If "hcRedir" = 1: The client automatically sends a new HTTP request if the
server answers with a redirect code (range 30x).
Default is 1.
hcAuth If set ("hcAuth" = 1) this flag determines that the HTTP client will automatically
answer on authentication requests from the server with the current "passwd"
and "user" parameter settings. If these parameters are not specified the MC55i
will terminate the HTTP connection and send an indication to the TA.
Default is 1.
smFrom Email sender address, i.e. "MAIL FROM" address (string).
Length: 6 ... 256
A valid address parameter consists of local part and domain name delimited by
a '@' character, e.g. "john.smith@somedomain.de".
smRcpt Recipient address of the email, i.e. "RCPT TO" address (string).
Length: 6 ... 256
If multiple recipient addresses are to be supplied the comma character is used
as delimiter to separate individual address values, e.g. "john.smith@somedo-
main.de,tom.meier@somedomain.de". Some mail servers do not accept recip-
ient addresses without brackets <>. It is recommended to use the "RCPT TO"
variable with brackets.
smCC CC recipient address of the email (string).
Length: 6 ... 256
If multiple CC recipient addresses are to be supplied the comma character is
used as delimiter to separate individual address values, e.g.
"john.smith@somedomain.de,tom.meier@somedomain.de".
smSubj Subject content of the email (string).
Length: 0 ... 256
If no subject is supplied the email will be sent with an empty subject.
smHdr This parameter, if set, will be appended at the end of the email header section
(string).
Length: 0... 256
Hence, it serves as a generic header field parameter which allows the user to
provide any email header field. It is the user's responsibility to provide correct
header fields!
String of max. 256 characters.
Example for multipart MIME messages:
"Content-Type: multipart/mixed".
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smAuth SMTP authentication control flag (numeric).
If disabled (<srvParmValue> "0" by default), MC55i performs action without
SMTP authentication.
If enabled (<srvParmValue> "1") authentication procedure with the SMTP
server will be performed by means of supported authentication methods, using
values of "user" and "passwd" parameters. If MC55i and SMTP server are not
able to negotiate an authentication mechanism supported by both parties, the
MC55i continues action without authentication.
MC55i supports SMTP authentication.
pCmd POP3 user command to be executed by the POP3 service (numeric).
For supported values of <srvParmValue> refer to <srvParmValue-pCmd>.
pNumber Optional message number argument used by the POP3 commands List ("2"),
Retrieve ("3") and Delete ("4"). For POP3 commands see <srvParmTag>
value "pCmd".
Length: 0 ... 231-1
If no specific value is set in the service profile, the value "0" is assumed by
default, i.e. "pNumber" is disabled.
pLength Maximum message length (string, optional)
Length: 0 ... 231-1
"pLength" can be used to specify the length of the message(s) to be retrieved
from or deleted on the POP3 server. If no specific value is set in the service
profile, the default value "0" is assumed, which means that there is no limit on
the message size.
A warning will be issued inthe following cases:
• If "pNumber" > 0 and a specific message to be retrieved from / deleted on
the server is longer than "pLength".
• If "pNumber" = 0 and all messages to be retrieved from / deleted on the
server are longer than "pLength".
No warning will be issued in the following cases:
• If there are no messages at all on the server.
• If the server has message(s) below and above the "pLength" specified. In
this case, the message(s) within the range of "pLength" can be successfully
retrieved or deleted, but the message(s) above "pLength" remain on the
server without any further notification given to the user.
• Therefore, after retrieving / deleting messages, it is recommended to check
the message status on the server. This can be done by adding a further
POP3 service profile using the POP3 user command List ("2").
pDelFlag Flag to be used with the POP3 user command Retrieve ("3"). Specifies whether
or not to delete retrieved emails on the server (optional).
For supported values of <srvParmValue> refer to <srvParmValue-
pDelFlag>.
tcpMR Parameter can be used to overwrite the global AT^SCFG parameter "Tcp/
MaxRetransmissions" <tcpMr> for a specific Internet Service connection pro-
file. If the parameter is not specified the value specified with AT^SCFG will be
used.
Supported values <srvParmValue> for this parameter are the same as
described for <tcpMr>.
Setting is not relevant for Internet Service "Socket" with type "UDP".
tcpOT Parameter can be used to overwrite the global AT^SCFG parameter "Tcp/Over-
allTimeout" <tcpOt> for a specific Internet Service connection profile. If the
parameter is not specified the value specified with AT^SCFG will be used.
Supported values <srvParmValue> for this parameter are the same as
described for <tcpOt>.
Setting is not relevant for Internet Service "Socket" with type "UDP".
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Parameter value; type and supported content depend on related <srvParmTag>.
Supported Internet service type values in <srvParmValue> for <srvParmTag> value "srvType".
Before changing the "srvType" of an existing service profile be sure that the profile is closed. To verify the con-
nection state of the service profile enter the read command AT^SISI. Only when <srvState>=2 is returned
for this specific service profile you can change its service type.
“Socket“ MC55i acting as client or server (listener) for TCP or UDP.
If MC55i is TCP listener at least two service profiles are required. The first
socket profile must be configured as listener. The second service profile will be
dynamically assigned when a socket connection request from a remote client
is incoming. For this purpose, one service profile must be left free (= not con-
figured with AT^SISS). An incoming socket connection request will be indi-
cated by the "^SIS" URC, with the next free <srvProfileId> shown inside
the URC as parameter <urcInfoId>. The connection request can be
accepted or rejected by using the commands AT^SISO or AT^SISC and the ID
retrieved from the "^SIS".
“Ftp“ MC55i acting as FTP client.
“Http“ MC55i acting as HTTP client.
“Smtp“ MC55i acting as SMTP client.
“Pop3“ MC55i acting as POP3 client.
“none“ Reset Internet service profile settings. Operation is not allowed if profile is in
use, i.e. it was activated via AT^SISO.
Supported string parameter character set selections in <srvParmValue> for <srvParmTag> value "alphabet".
[“0“] Applicable character set is determined by current setting of AT+CSCS.
“1“ International Reference Alphabet (IRA, seven bit ASCII).
Supported POP3 user command values in <srvParmValue> for <srvParmTag> value "pCmd".
1 Status command.
This command retrieves the "drop listing" of a POP3 server. A "drop listing"
consists of a single line containing the number of messages in the maildrop list
followed by the total size of the maildrop list in bytes. Each drop listing will be
finished by a so-called "dotline", i.e. a new line with just a single dot.
2 List command.
If <srvParmTag> value "pNumber" is set to a non-zero value the "List" com-
mand returns the "scan listing", consisting of a single line which contains the
message number and the message size in bytes if the specified message
exists in the maildrop list on the POP3 server.
If no such message exists on the server than the POP3 service issues an error
response to the user.
If <srvParmTag> value "pNumber" is zero the "List" command returns a multi-
line "scan listing". For each message on the maildrop list of the server the
POP3 service returns a line containing the message number and its size in
bytes. A final "dotline" will be printed at the end of the "scan listing".
If there are no messages on the maildrop list of the server, the POP3 service
returns a positive response, i.e. it doesn't issue an error response, but the
"scan listing" will be empty.
In either case, each scan listing will be finished by a so-called "dotline", i.e. a
new line with just a single dot.
<srvParmValue>(str)
<srvParmValue-srvType>(str)
<srvParmValue-alphabet>(str)
<srvParmValue-pCmd>(num)
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3 Retrieve command.
If <srvParmTag> value "pNumber" is set to a non-zero value this command
retrieves the related message from the POP3 server's maildrop list.
If no such message exists on the server the POP3 service issues an error
response to the user.
It depends on the parameter "pDelFlag" if the message will be deleted from the
POP3 server upon successful retrieval.
If <srvParmTag> value "pNumber" is zero the "Retrieve" command returns all
messages pending in the POP3 server's maildrop.
If there are no messages on the maildrop list of the server the POP3 service
returns with a positive response, i.e. it doesn't issue an error response, but the
returned list will be empty.
Each email will be finished by a so-called "dotline", i.e. a new line with just a
single dot.
4 Delete command
If <srvParmTag> value "pNumber" is set to a non-zero value the command
deletes the related message from the POP3 server's maildrop list. In fact, the
message is marked as deleted on the server and will be deleted permanently
if the POP3 service command executes successfully. In case an error has
occurred, e.g. network loss, the message will not be deleted on the server even
though the POP3 service command has been finished.
If <srvParmTag> value "pNumber" is zero the "Delete" command deletes all
messages from the POP3 server's maildrop list. In fact, the messages are
marked as deleted on the server and will be deleted permanently if the POP3
service command executes successfully. In case an error has occurred, the
messages will not be deleted on the server even though the POP3 service
command has been finished.
Supported flag values in <srvParmValue> for <srvParmTag> value "pDelFlag". Only applicable if the profile
contains the POP3 user command Retrieve ("3").
[0] Messages will not be deleted on the server.
1 Delete messages on the server which have been retrieved successfully.
Note
• String parameters are truncated if greater than the maximum length specified above.
<srvParmValue-pDelFlag>(num)
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10.4 AT^SISI Internet Service Information
AT^SISI serves to monitor the status of Internet service profiles defined with AT^SISS.
The AT^SISI read command requests the current status of all defined Internet service profiles.
The AT^SISI write command requests the status of the specified Internet service profile. If the specified service
profile is not defined yet, "+CME ERROR" is returned.
Syntax
Test Command
AT^SISI=?
Response(s)
[^SISI:(list of defined <srvProfileId>s)]
OK
Read Command
AT^SISI?
Response(s)
If response is related to service profile(s) created / opened on this interface:
[^SISI: <srvProfileId>, <srvState>, <rxCount>, <txCount>, <ackData>, <unackData>]
[^SISI: ...]
If response is related to service profile(s) created / opened on other interface(s):
[^SISI: <srvProfileId>, <srvParmTag>value "srvType"]
[^SISI: ...]
OK
ERROR
Write Command
AT^SISI=<srvProfileId>
Response(s)
^SISI: <srvProfileId>, <srvState>, <rxCount>, <txCount>, <ackData>, <unackData>
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
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Parameter Description
Internet service profile identifier as defined by AT^SISS (<srvProfileId>).
0...9
Internet service state (for details see AT^SISO parameter <srvState>).
2 Allocated
3 Connecting
4Up
5 Closing
6Down
Number of bytes received via AT^SISR since last successful AT^SISO write command.
This is the same value as displayed by the AT^SISO read command with the parameter <rxCount>.
Number of bytes sent via AT^SISW since last successful AT^SISO write command.
This is the same value as displayed by the AT^SISO read command with the parameter <txCount>.
Number of data bytes already sent and acknowledged at TCP layer. Value 0 indicates that no sent data is
acknowledged yet.
Parameter is not applicable to HTTP, POP3, SMTP and Socket with UDP. For these services the counter is
always set to 0.
Number of data bytes already sent but not yet acknowledged at TCP layer. A value 0 indicates that all sent data
is already acknowledged.
This is the same value as displayed in the response of the AT^SISW write command with the parameter
<unackData>.
Parameter is not applicable to HTTP, POP3, SMTP and Socket with UDP. For these services the counter is
always set to 0.
Note
• If a service is in state "Down" the responses for <rxCount>, <txCount>, <ackData> and <unackData>
are the last known values for the service in the states "Connecting", "Up" and "Closing".
<srvProfileId>(num)
<srvState>(num)
<rxCount>(num)
<txCount>(num)
<ackData>(num)
<unackData>(num)
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10.5 AT^SISO Internet Service Open
The AT^SISO write command starts the Internet session configured by the service profile. All further steps
needed to control the session depend on whether you are using URC mode or polling mode. The AT^SISO read
command returns the current status of all services.
URC mode:
If the service opens successfully, the URCs "^SISW" and "^SISR" will trigger the action to follow, either writing
data with AT^SISW or reading data with AT^SISR. To terminate an upload data stream set the <eodFlag>
within the last AT^SISW command. If the URCs notify that a data transfer has been successful ("^SISR: x, 2" or
"^SISW: x, 2"), the service can be closed with AT^SISC. If a special event occurs, e.g. an error or a warning,
after opening or while using a service then the URC type "^SIS" will be delivered.
Polling mode:
After opening the service, all progress information needed to control the session shall be explicitly requested by
the host application. The particular sequence of AT commands varies depending on the service used. The fol-
lowing list summarizes, by way of an example, the steps normally involved in managing an upload or download
job.
• Upload (Socket, FTP, HTTP, SMTP):
- Enter the AT^SISO command, e.g. AT^SISO=9.
-Enter AT^SISW, specify <reqWriteLength>, e.g. AT^SISW=9,20. Check resulting response for <cnf-
WriteLength>. Optionally, check error with AT^SISE, e.g. AT^SISE=9. If necessary, repeat the
sequence several times.
- Enter last AT^SISW command and enable <eodFlag>, e.g. AT^SISW=9,0,1.
If Socket service: Query available data with AT^SISR, e.g. AT^SISR=9,1430.
- Check service state with AT^SISI, e.g. AT^SISI=9, if necessary several times until <srvState>=6
("Down").
- Check error with AT^SISE, e.g. AT^SISE=9.
- Close service with AT^SISC, e.g. AT^SISC=9.
• Download (Socket, FTP, HTTP, POP3):
- Enter the AT^SISO command, e.g. AT^SISO=9.
-Enter AT^SISR, specify <reqReadLength>, e.g. AT^SISR=9,1000. Check resulting response for
<cnfReadLength>. If necessary, repeat the sequence several times until <cnfReadLength>= -2 (end
of data) or ERROR.
- Check error with AT^SISE, e.g. AT^SISE=9.
- Close service with AT^SISC, e.g. AT^SISC=9.
• Socket service (upload and download possible in one session):
- Recommended: Set AT+CMEE=2 to enable extended error text.
- Enter the AT^SISO command, e.g. AT^SISO=9.
-Enter AT^SISR or AT^SISW, specifying <reqReadLength> or <reqWriteLength>, e.g.
AT^SISR=9,20 or AT^SISW=9,20. Check resulting response for <cnfReadLength> or <cnfWrite-
Length>. If necessary, repeat the sequence several times.
- Check error with AT^SISE, e.g. AT^SISE=9.
- If write action: Enter last AT^SISW command and enable <eodFlag>, e.g. AT^SISW=9,0,1. 1)
If Socket service: Query available data with AT^SISR, e.g. AT^SISR=9,1430.
- Close service with AT^SISC, e.g. AT^SISC=9.
Syntax
Test Command
AT^SISO=?
Response(s)
OK
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Parameter Description
<srvProfileId> 0 ... 9 specified with AT^SISS.
Internet service state.
Please note, that the state of an Internet service may influence the state of the serial DCD line. For details see
description of value 2 for parameter <value> of command AT&C.
2 Allocated
Service profile resources are allocated, i.e. at least the service type has been
set (parameter <srvParmTag>, value "srvType" of AT^SISS). The service is
not opened, but ready for configuration.
3 Connecting
State after opening a service with AT^SISO where the connection is being
established.
If connection setup is successful the service proceeds to the state "4" (Up) and
one of the URCs "^SISW" and "^SISR" may follow. If connection setup is not
successful, the "^SIS" URC may appear and the service enters <srvState>
6 (Down).
In the case of FTP, <srvState>=3 means that the command channel is being
established.
If the service profile is configured as Socket listener, then the listener always
stays at <srvState>=3 and <socketState>=3 (LISTENER), while the
<srvState> and <socketState> of the dynamically assigned service pro-
file may change. See examples in Section 10.5.1.
4Up
The service performs its purpose. The data transfer process is the major func-
tion at this state.
FTP: Data channel is up.
SMTP: The SMTP service will not enter <srvState>=4 until the host has writ-
ten the first data packet with AT^SISW.
5 Closing
Internet Service is closing the network connection.
FTP: Command channel is released.
Read Command
AT^SISO?
Response(s)
^SISO: <srvProfileId>, <srvParmTag>value "srvType" [, <srvState>, <socketState>,
<rxCount>, <txCount>, <locAddr>, <remAddr>]
[^SISO: ...]
OK
Write Command
AT^SISO=<srvProfileId>
Response(s)
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
± + + + + + - - -
<srvProfileId>(num)
<srvState>(num)
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6 Down
This state is entered if
- the service has successfully finished its session (see note on Socket),
- the remote peer has reset the connection or
- the IP connection has been closed because of an error (see note below on
service or network errors).
If a service in this state be sure to close it with AT^SISC before reopening it.
Socket state identifier.
0 Same as value "1", but applicable only if service profile is POP3.
1 Socket not assigned, i.e. no TCP/UDP connection active.
2 Socket assigned as CLIENT.
3 Socket assigned as LISTENER.
4 Socket assigned as SERVER.
Number of bytes received via AT^SISR since last successful AT^SISO write command.
Number of bytes sent via AT^SISW since last successful AT^SISO write command.
Recently used local IP address in dotted-four-byte format and TCP port, separated by colon, e.g.
"192.60.10.10:80".
Remote IP address in dotted-four-byte format and TCP port, separated by colon, e.g. "192.60.10.10:80".
Notes
• If the bearer cannot be established and AT^SISO returns an error there might be a general GSM/GPRS prob-
lem. To identify the reason you can take advantage of the AT+CEER command. Using AT+CEER is especially
recommended when the <infoID> parameter of the AT^SISE command equals 0.
• If a service or network error occurs during an IP session and the "^SIS" URC or the AT^SISE command dis-
play an error message, the service enters <srvState>=5 and then 6, i.e. the IP connection is closed. In this
case, the service still allows reading the data stored in the buffer, but writing data is denied. After reading,
close the service and open it again.
• As in polling mode no error URCs are available you are advised to integrate the commands AT^SISI and
AT^SISE into the command sequences for upload and download jobs. So, the AT^SISO command may be
followed by AT^SISI to check that the service has entered the <srvState>=4 before sending AT^SISR or
AT^SISW. This helps you to detect errors even though the "^SIS" URCs are disabled. A typical example is
that the service fails to be opened because the service profile contains a wrong destination address. In such
a case, after opening with AT^SISO and OK response, the service quickly enters the states <srvState>=2,
4 and 6, with an error being returned no earlier than after sending the first AT^SISR or AT^SISW command.
In URC mode, an error URC, such as "Host not found" would be received in this situation, but in polling mode
the only way to detect the state is using AT^SISI or, alternatively, AT^SISO.
<socketState>(num)
<rxCount>(num)
<txCount>(num)
<locAddr>(str)
<remAddr>(str)
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10.5.1 Example: Accepting / Rejecting Socket Connection Request
from Remote Client
Host 1 configured as Socket listener with IP address 10.10.0.187 at port 65534 is receiving a connection request
from the remote client 10.10.0.185 (at port 1024). The example assumes that connection and service profiles
have been created as stated earlier.
Start the Socket service in listener mode, then query the IP address dynamically assigned to the Socket listener:
Indication of incoming Socket connection request:
Host 1 accepts the Socket connection request:
at^siso=4
Host 1 opens the Socket service.
at^siso?
Query the current status of all services. All service
profiles are unused, except for service profile 4
which is running in listener mode, where
<srvState>=3 (listening) and <socketState>=3
(LISTENER). The response also indicates the IP
address dynamically assigned to the listener. The lis-
tener's access data (IP address and TCP port num-
ber) shall be passed on to the client.
^SISO: 0, ""
^SISO: 1, ""
^SISO: 2, ""
^SISO: 3, ""
^SISO: 4, "Socket","3","3","0","0","10.10.0.187:65534","0.0.0.0:0"
^SISO: 6, ""
^SISO: 7, ""
^SISO: 8, ""
^SISO: 9, ""
OK
^SIS: 4, 1, 0
The URC indicates that the listener configured on
service profile 4 is receiving a Socket connection
request (<urcCause>=1) from the remote client.
The last URC parameter <urcInfoId> represents
the ID of the dynamically assigned service profile,
here 0.
at^siso?
Query the current status of services.
^SISO: 0, "Socket","2","4","0","0",
"10.10.0.187:0","10.10.0.185:1024"
Indication on host 1 that the connection request from
the remote client has been dynamically assigned to
service profile 0 which is set to Server mode
(<socketState>=4).
^SISO: 1, ""
^SISO: 2, ""
^SISO: 3, ""
^SISO: 4, "Socket","3","3","0","0", "10.10.0.187:65534","0.0.0.0:0"
^SISO: 6, ""
^SISO: 7, ""
^SISO: 8, ""
^SISO: 9, ""
OK
at^siso=0
Host 1 accepts the connection request, where 0 is
the ID of the dynamically assigned service profile.
OK
^SISW: 0, 1
The URC indicates that data transmission to the
remote client is possible. If the remote client has
already sent some data the additional URC ^SISR:
0,1 is displayed.
at^siso?
Query the current status of services.
^SISO: 0, "Socket","4","4","0","0",
"10.10.0.187:65534","10.10.0.185:1024"
The socket connection between host 1 and remote
client is successfully established.
^SISO: 1, ""
^SISO: 2, ""
^SISO: 3, ""
^SISO: 4, "Socket","3","3","0","0","10.10.0.187:65534","0.0.0.0:0"
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Host 1 rejects the Socket connection request:
^SISO: 6, ""
^SISO: 7, ""
^SISO: 8, ""
^SISO: 9, ""
OK
at^sisc=0
Host 1 rejects the connection request, where 0 is the
ID of the dynamically assigned service profile.
OK
at^siso?
Query the current status of services.
^SISO: 0, ""
The dynamically assigned service profile is free
again. The Socket listener stays at <srvState>=3
(listening) and <socketState>=3 (LISTENER).
^SISO: 1, ""
^SISO: 2, ""
^SISO: 3, ""
^SISO: 4, "Socket","3","3","0","0","10.10.0.187:65534","0.0.0.0:0"
^SISO: 6, ""
^SISO: 7, ""
^SISO: 8, ""
^SISO: 9, ""
OK
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10.6 AT^SISC Internet Service Close
The AT^SISC write command closes the TCP/IP connection to the remote peer which was opened with
AT^SISO. All resources are released, all status information parameters, e.g. <srvState>, <unackData>,
<ackData>, <rxCount> and <txCount> counters, are reset. Only the initial configuration settings are pre-
served. The service can be restarted any time, using the same configuration or a new one.
Syntax
Parameter Description
0...9 <srvProfileId> specified with AT^SISS.
Test Command
AT^SISC=?
Response(s)
OK
Write Command
AT^SISC=<srvProfileId>
Response(s)
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
± + + + + + - - -
<srvProfileId>(num)
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10.7 AT^SISR Internet Service Read Data
The AT^SISR command either triggers a read operation (download) or queries the number of bytes in the internal
buffer.
The AT^SISR write command may return the following errors:
•"+CME ERROR: operation failed" if there is a problem on application, socket, PPP or GPRS/GSM level. The
AT^SISE command and the "^SIS" URC offer additional error information.
•"+CME ERROR: operation temporary not allowed" e.g. if the service has not network resources allocated.
•"+CME ERROR: operation not allowed" e.g. if the service is not configured.
Syntax
Unsolicited Result Code
^SISR: <srvProfileId>, <urcCauseId>
Data availability status of the Internet service configured with AT^SISS has changed. The URC is issued when:
• data is available after opening an Internet service or
• less data was confirmed (in <cnfReadLength>) than requested (with <reqReadLength>) during the last
"Read Data" operation and new data is available.
The URC is disabled in polling mode. See AT^SCFG, parameter "Tcp/WithURCs", <tcpWithUrc>.
Parameter Description
<srvProfileId> 0 ... 9 specified with AT^SISS.
0 Peek Operator: Query number of received bytes within internal buffers.
The behaviour of the peek operator depends on the selected Internet service,
i.e. it may not be supported by all IP Services.
For "Socket" service configured for UDP the size of the next available UDP
packet is returned.
1...1500 Requested number of data bytes to be read via the Internet service specified
in <srvProfileId>.
Test Command
AT^SISR=?
Response(s)
OK
Write Command
AT^SISR=<srvProfileId>, <reqReadLength>
Response(s)
^SISR: <srvProfileId>, <cnfReadLength>[, <remainUdpPacketLength>]
Number of data bytes are sent as specified by <cnfReadLength>. If peek operator was used no data bytes
are sent.
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
± + + + + + - - +
<srvProfileId>(num)
<reqReadLength>(num)
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-2 Indicates end of data. Data transfer has been finished (all data have been read)
and the service can be closed with AT^SISC.
-1 Applies only to HTTP: Querying number of available bytes is not supported by
the HTTP service.
0 Indicates that no further data is available at the moment.
>0 Number of available data bytes. The range is determined by
<reqReadLength>:
If <reqReadLength> was greater than 0, then <cnfReadLength> may be
less or equal to the value requested with <reqReadLength>.
If <reqReadLength> equals 0 (peek operator) the value indicated by
<cnfReadLength> may be greater than 1500.
Indicates whether or not data is available for reading with AT^SISR.
1 Data is available and can be read by sending the AT^SISR command. The
URC appears when less data was confirmed (in <cnfReadLength>) than
requested (with <reqReadLength>) during the last "Read Data" operation
and new data is available.
2 End of data. Data transfer has completed (all data read). The service can be
closed with AT^SISC.
Optional third parameter of the AT^SISR write command response displayed only if the Socket service uses the
UDP protocol.
The reception of each datagram must be completed before the next datagram can be received. This may be a
problem if the buffer of the host application is limited and not designed to handle the maximum packet size of
1500 bytes. To compensate this, the host is advised to request, via <reqReadLength>, an amount less or
equal its maxmimum buffer capacity and wait for the resulting AT^SISR write command response with param-
eter <remainUdpPacketLength>. The benefit of this approach is that the host may properly receive all parts
of a UDP datagram, as after each received data part the number of remaining bytes is synchronized, until read-
ing the datagram is finished.
If the currently read datagram is smaller than the number of bytes requested by the host the <remainUdpPack-
etLength> parameter is omitted.
Further write attempts with AT^SISR are denied as long as the <remainUdpPacketLength> is unequal 0 or
is not omitted. In this case the service returns "+CME ERROR: operation of service temporary not allowed".
0 Indicates that all bytes of the current UDP datagram are read.
1...(max. data size)-1 Indicates that the currently read UDP datagram is not yet complete. The dis-
played value is the remaining number of bytes.
<remainUdpPacketLength> is unequal 0 until reading all parts of the cur-
rent datagram is finished.
10.7.1 Example: Socket Host Reads Small Amounts of UDP Data Pack-
ets (URC Mode)
This section applies only to the Socket service using the UDP protocol. The example shows how to read UDP
packets if the buffer of the host application can handle only a few bytes. There are two datagrams available for
reading.
Buffer size: 6 bytes
Datagram A = 18 bytes (content "THIS_IS_DATAGRAM_A")
Datagram B = 3 bytes (content "NEW")
<cnfReadLength>(num)
<urcCauseId>(num)
<remainUdpPacketLength>(num)
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^SISR: 0,1
Service profile 0 is configured for Socket service and UDP. The URC
notifies host that data is available for reading.
at^sisr=0,6
The host requests to read 6 bytes.
^SISR: 0,6,12
THIS_I
The first 6 bytes of datagram A are confirmed and transmitted. Another
12 bytes are still available.
OK
at^sisr=0,6
The host requests to read the next part of 6 bytes.
^SISR: 0,6,6
S_DATA
The next 6 bytes of datagram A are confirmed and transmitted. Another
6 bytes are still available.
OK
at^sisr=0,6
The host requests to read the next part of 6 bytes.
^SISR: 0,6,0
GRAM_A
Last part of datagram A was received, no remainder is left.
OK
at^sisr=0,6
Again, the host requests to read 6 bytes. This time, the request refers to
datagram B which has only 3 bytes. As the read datagram is smaller
than the size requested by the host, the response does not include the
<remainUdpPacketLength>.
^SISR: 0,3
NEW
3 bytes are confirmed and transmitted. Datagram B was properly
received.
OK
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10.8 AT^SISW Internet Service Write Data
The AT^SISW command triggers a write operation (upload) and queries the amount of data already sent, but not
acknowledged at the TCP layer. The write operation may be run in binary mode, or in interactive text mode.
The AT^SISW write command may return the following errors:
•"+CME ERROR: operation failed" if there is a problem on application, socket, PPP or GPRS/GSM level. The
AT^SISE command and the "^SIS" URC offer additional error information.
•"+CME ERROR: operation temporary not allowed" e.g. if the service has not network resources allocated.
•"+CME ERROR: operation not allowed" e.g. if the service is not configured.
Syntax
Unsolicited Result Code
^SISW: <srvProfileId>, <urcCauseId>
Data availability status of the Internet service configured with AT^SISS has changed. The URC is issued when
the service is ready to accept new user data.
The URC is disabled in polling mode. See AT^SCFG, parameter "Tcp/WithURCs", <tcpWithUrc>.
Parameter Description
<srvProfileId> 0 ... 9 specified with AT^SISS.
0...1500
Specifies the number of bytes to be sent with AT^SISW or, if set to 0, requests the amount of data already sent
with AT^SISW but not yet acknowledged:
• Parameter <reqWriteLength> may be 1...1500 bytes to specify the amount of data to be sent with
AT^SISW.
• If parameter <reqWriteLength> equals 0, AT^SISW does not expect any data, but a normal query is per-
fomed. This allows the application to explictly request, in particular at the end of an upload job, the amount of
unacknowledged data at the TCP layer indicated by <unackData>.
• In interactive text mode, <reqWriteLength> must be set to any value greater than 0 (but not necessarily
the precise number of bytes). If set to 0 in interactive text mode, <reqWriteLength> would be interpreted
as query for unacknowledged data and, thus, prevent data transfer.
Test Command
AT^SISW=?
Response(s)
OK
Write Command
AT^SISW=<srvProfileId>, <reqWriteLength>[, <eodFlag>[, <mode>]]
Response(s)
^SISW: <srvProfileId>, <cnfWriteLength>, <unackData>
Number of data bytes as specified by <cnfWriteLength>.
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
± + + + + + - - +
<srvProfileId>(num)
<reqWriteLength>(num)
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• If Socket service is selected with UDP protocol
-<reqWriteLength>=0 can be used to send an empty UDP packet;
- it is recommended that the size of each data packet be limited to 1460 bytes. Otherwise, it is possible that
the following URC occurs: "^SIS: <id>, 0, 9, The supplied buffer was too small / large".
End of data indication flag.
Parameter is ignored for HTTP, POP3, FTP download.
[0] No end of data. Other data may follow to be transmitted via the Internet service.
1 End of data is signalled to the Internet Service. Further AT^SISW write com-
mands return an error response. However, reading data may be possible. The
<eodFlag> is effective only if the <reqWriteLength> equals <cnfWrite-
Length>, in particular if the <reqWriteLength> equals 0.
If <mode> equals 1 the <eodFlag> is effective only if the write operation has
been finished with CTRL-Z.
Control how the application provides the data bytes to be sent.
[0] Binary mode
This mode allows sending a number of bytes defined with parameter
<reqWriteLength>.
1 Interactive text mode
This mode allows the user to type and send 8-bit ASCII characters while the
service is open. Ctrl-Z terminates data input and causes the data to be trans-
ferred.
Interactive text mode requires that the <reqWriteLength> is set to any value
greater than 0 (though it is not necessary to specify the precise number of
bytes). In this case the <cnfWriteLength> parameter indicates the maxi-
mum length of the data stream without control character CTRL-Z.
In interactive text mode, the following characters are predefined as control
codes:
• BACKSPACE ("\x08") deletes the last given character,
• CTRL-Z ("\x1a") terminates the input,
• ESC ("\x1b") aborts the command. An <eodFlag> is ignored in this case.
The V.25 command ATE also controls the echo mode of the interactive text
mode. If echo is enabled (ATE1) all characters are echoed until <cnfWrite-
Length> is reached. Any attempt to input further data ends up with the warn-
ing message 4001 indicated after the data stream has been completed with
CTRL-Z, nevertheless all data within the range of <cnfWriteLength> will be
sent. See also Section 10.10, Internet Service URC "^SIS". ATE0 disables the
echo mode generally.
0...1500 Confirmed number of data bytes which can be transmitted via the Internet ser-
vice configured in <srvProfileId>. In binary mode (see <mode>) this num-
ber may be less or equal to the value requested with <reqWriteLength>.
The application has to deliver exactly the number of bytes indicated by <cnf-
WriteLength>. A 0 value means that no data can be written at this time, i.e.
it serves as a flow control mechanism.
In interactive text mode, <cnfWriteLength> indicates the maximum number
of bytes it can process. Characters above the indicated number are ignored.
<eodFlag>(num)
<mode>(num)
<cnfWriteLength>(num)
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Number of data bytes already sent but not yet acknowledged at the TCP layer.
The value is constantly changing until the entire upload job has completed. If the value equals 0 all data sent so
far is acknowledged.
In binary mode, <unackData> includes the <cnfWriteLength> value of the pending write operation. There-
fore, the very first write operation of an upload job returns identical values for <cnfWriteLength> and
<unackData>.
This mechanism allows the host application to easily verify whether or not the remote host has successfully
received the data.
Parameter is not applicable to HTTP, POP3, SMTP and Socket with UDP protocol. For these services the
counter is always set to 0.
1 The service is ready to accept new user data.
2 Data transfer has been finished successfully and Internet service may be
closed without loss of data.
Notes
•The AT^SISW write command must be terminated only with the ASCII character set with ATS3. The factory
default for S3 is #13 (Carriage Return). Do not send any further characters after the S3 end-of-line identifier,
until the response "^SISW" is received. This is necessary to avoid that any characters related to the AT com-
mand can be interpreted as being part of the data stream to be transferred. Also refer to Section 1.4, AT Com-
mand Syntax.
• If the Socket service is configured for use as UDP client and fixed size and the interactive text mode is active,
the PDU length always equals the specified fixed length. If the input characters exceed the specified fixed
length, then all surplus characters will be ignored. If the input characters are less than the specified fixed
length, then the remaining range will be filled with "\0" bytes.
10.8.1 Usage of parameter <eodFlag>
<unackData>(num)
<urcCauseId>(num)
Service type
Socket After the service accepts the end-of-data flag the service state changes to "Closing". No fur-
ther user data is accepted.
After releasing the TCP link the service remains in state "Down".
FTP Parameter only applicable for FTP upload session.
After accepting the end-of-data flag the service state changes to "Closing" and starts to end
the running FTP session.
No further user data is accepted.
After the FTP session is completed on FTP protocol level the service state switches to "Down".
In case of successful completion the URC "^SISW: x,2" is generated.
SMTP SMTP service sends some "closing" commands to the SMTP server which are necessary to
mark the email as successfully sent on the server. The service enters "Closing" state and
remains in it until the final protocol exchange with the SMTP server has been completed.
The "OK" response following AT^SISW indicates that the SMTP service has accepted the last
data - IT DOES NOT indicate the successful completion of the SMTP service.
Successful completion will be indicated either by the appropriate URC "^SISW:x,2" or due to
the fact that the SMTP service state changes to "Down" state without any error.
HTTP / POP3 Parameter not applicable, i.e. value is ignored.
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10.9 AT^SISE Internet Service Error Report
The AT^SISE write command returns the current error status of the specified Internet service profile. If the ser-
vice profile is not defined or the value is invalid "+CME ERROR" response is returned.
The error status is identical to the content of the "^SIS" URC last issued.
If a service fails the commands AT^SISR or AT^SISW will return an error response. However, if the AT^SISE
command returns <infoID>=0 it is recommended to use the AT+CEER command because a general GSM/
GPRS problem might be the reason.
Syntax
Parameter Description
Internet service profile identifier as defined by AT^SISS <srvProfileId>.
0...9
Reason for Internet service error. This is a subset of the <urcInfoId>s which can be found in Section 10.10,
Internet Service URC "^SIS".
The value 0 indicates there is no special Internet service error. In this case the application may use AT+CEER
to check for general GSM/GPRS problems.
Information text related to <infoID>. This is a subset of the <urcInfoText>s which can be found in Section
10.10, Internet Service URC "^SIS".
Note
• In particular cases, the AT^SISE command may deliver information and warnings. This applies the following
services:
FTP: Information 2100
POP3: Warnings
SMTP: Warnings
If an error occurs the information and warning messages are overwritten by error messages.
Test Command
AT^SISE=?
Response(s)
OK
Write Command
AT^SISE=<srvProfileId>
Response(s)
^SISE: <srvProfileId>, <infoID>[, <info>]
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<srvProfileId>(num)
<infoID>(num)
<info>(str)
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10.10 Internet Service URC "^SIS"
This section first describes the syntax and the parameters of the "^SIS" URC. The second part consists of tables
listing the information elements delivered within the "^SIS" URC and the command response of AT^SISE.
The presentation of the "^SIS" URC containing the parameter <urcCause>=0 can be disabled or enabled
depending on whether polling mode or URC mode is preferred. To do so, use the AT^SCFG command, parameter
"Tcp/WithURCs" (refer to <tcpWithUrc>). However, if related to <urcCause>=1 or 2, the "^SIS" URC will
always be delivered regardless of the setting made with AT^SCFG.
Unsolicited Result Code
Indicates an event, an error or an information element. The same information can be obtained via AT^SISE.
^SIS: <srvProfileId>, <urcCause>[, [<urcInfoId>][, <urcInfoText>]]
The URC may appear if an event or an error occurs, for example after opening an Internet service with AT^SISO
or any time during operation. The URC also indicates a request for a mobile terminated Internet service client
connection, or a failure if a mobile terminated request is rejected. Furthermore, the URC may deliver an informa-
tion element resulting from a specific command given in the service profile.
A list of possible causes can be found in the tables below. The tables contain the <urcInfoId> and, if applica-
ble, a specific <urcInfoText>. If marked with *) the precise text related to a <urcInfoId> varies greatly
depending on the scenario and the implementation of the remote server. In these cases, only a brief explanation
of the scenario can be found in the table column "Description".
Parameter Description
URC cause identifier.
0 An event has occurred after opening or while using an Internet service.
The event number is presented via <urcInfoId> and may be an error, a
warning, an information element or a note. Optionally additional information
may be supplied via <urcInfoText>.
1 Indicates that an opened Socket listener service is receiving a connection
request from a remote client.
The incoming socket connection is dynamically assigned to the next free Inter-
net service profile. In this case, the parameter <urcInfoId> inside the "^SIS"
URC equals the <srvProfileId> of the dynamically assigned service pro-
file. This ID shall be used to accept the connection request with AT^SISO or to
reject it with AT^SISC.
The connection status may be requested by using the AT^SISI read or write
command or the AT^SISO read command. Among other details, the response
indicates the IP address of the remote client (parameter <remAddr>). This
may be helpful to decide whether to accept or reject the request.
2 Incoming Socket service client connection has failed. The client request was
rejected automatically because no free Internet service profile was available.
Information identifier related to <urcCause>. See tables below for further detail. The <urcInfoId> number
ranges indicate the type of information element:
0: Service is working properly.
1 - 2000: Error, service is aborted and enters <srvState>=6 (Down).
2001 - 4000: Information related to progress of service.
4001 - 6000: Warning, but no service abort.
6001 - 8000: Notes
Additional information for Socket service: As stated above, if a Socket connection request from a remote client
is received (see <urcCause>=1) the <urcInfoId> equals the <srvProfileId> of the dynamically assigned
free service profile.
<urcCause>(num)
<urcInfoId>(num)
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Information text related to <urcCause>. See tables below for further detail.
10.10.1 Information Elements Related to the Service Application
The following table lists the informatiomation elements which may be returned by all supported services within
the "^SIS" URC and the command response of AT^SISE. It should be noted that TCP/IP socket problems may
occur in all Internet service connections (Socket, FTP, HTTP, POP3 or SMTP).
<urcInfoText>(str)
<urcInfoId> <urcInfoText> Description
Information Elements Returned by the TCP/IP socket
2 Invalid socket descriptor Socket error
3 Bad address specified Socket error
4 Invalid operation Socket error
5 No free socket descriptors Socket error
6 The operation would block Socket error
7 A previous attempt at this operation is still ongoing Socket error
8 Socket is not bound Socket error
9 The supplied buffer is too small / large Socket error
10 Flags not supported Socket error
11 Operation not supported Socket error
12 The address is already in use Socket error
13 The network is unavailable Socket error
14 An established connection was aborted (transmission
time-out or protocol error)
Socket error
15 Remote host has reset the connection Socket error
16 No buffer space available Socket error
17 The socket is already connected Socket error
18 For TCP/IP sockets, the socket is not connected Socket error
19 Socket has been shut down Socket error
20 Connection timed out Socket error
21 Remote host has rejected the connection Socket error
22 Remote host is unreachable Socket error
23 An unexpected error occurred Socket error
24 Host not found DNS error
25 An error occurred that may be transient; a further attempt
may succeed.
DNS error
26 An unrecoverable error occurred DNS error
General Information Elements
46 Fatal: The service has detected an unknown error
47 *) Indicates that the remote ser-
vice has closed the connection.
The host shall close the service.
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10.10.2 Information Elements Related to FTP Service
48 Remote peer has closed the connection Remote peer has closed the
connection unexpectedly, and
no data are available. The host
shall close the service.
Note that the "^SIS" URC only
indicates the <urcInfoId>,
but the AT^SISE command
indicates both the <urcIn-
foId> and the <urcInfo-
Text>.
49 Fatal: No memory is available for service action
50 Fatal: Service has detected an internal error
80 Connection profile not defined.
84 PPP LCP FAILED PPP error
85 PAP Authentication failed PPP error
86 CHAP Authentication failed PPP error
87 IPCP failed PPP error
Warnings
4001 Applies only to interactive text
mode: Indicates that number of
input characters is greater than
<cnfWriteLength>.
General Information Elements
6001 General progress information
for connection setup.
<urcInfoId> <urcInfoText> Description
100 FTP Server rejects session.
101 FTP Server rejects USER command.
102 FTP Server rejects PASS command.
103 FTP Server rejects PASV command or client can't detect
remote IP address.
104 FTP Server rejects requested client action.
105 The given path segment is wrong.
106 *) The FTP client requests the file
size from the server before
starting the download. During
transmission phase the client
adds the bytes which are sent
via serial line. After transmis-
sion is done the client com-
pares the amount of bytes
transferred via serial line and
socket.
2100 FILE: <filename> File name assigned by FTP
server if mode=u is used.
<urcInfoId> <urcInfoText> Description
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10.10.3 Information Elements Related to HTTP Service
10.10.4 Information Elements Related to POP3 Service
10.10.5 Information Elements Related to SMTP Service
*) Text varies depending on scenario.
<urcInfoId> <urcInfoText> Description
Error URCs
200 HTTP-ERR: Not connected - cannot send request
HTTP-ERR: failed on sending request
201 <HTTP Response Str> Client error
202 <HTTP Response Str>
HTTP-ERR: Service unavailable
Server error
203 HTTP-ERR: Redirect failed - too many redirects
HTTP-ERR: Redirect failed - not allowed
HTTP-ERR: Redirect failed - location missing
Max. number of allowed redi-
rects: 6
204 HTTP-ERR: auth failed - user name or password missing
HTTP-ERR: auth failed - user name or password wrong
HTTP-ERR: Authority required for this URL
HTTP-ERR: No access to this URL allowed
Info URCs
2200 HTTP Redirect to: <Host>:<Port> <Path>
2201 HTTP Response <Response code>
Example: ^SIS: 2,3,2201, "HTTP Response: HTTP/1.1
200 OK"
<urcInfoId> <urcInfoText> Description
Errors
300 *) Indicates that the POP3 User Command could
not be executed successfully.
Warnings
4300 *) POP3 specific warning
<urcInfoId> <urcInfoText> Description
Errors
400 *) Indicates that the SMTP service could not be
executed successfully.
Warnings
4400 *) SMTP specific warning
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10.11 Examples of how to Configure and Use Internet Service Profiles
Below you can find selective examples of how to configure and use Internet service profiles. To visualize the dif-
ference between URC mode and polling mode the operation of services (after opening with AT^SISO) is
explained in separate examples for either mode.
10.11.1 Selecting URC Mode or Polling Mode
To enable or disable the presentation of URCs for the Internet services use the AT^SCFG command, type "TcpIp/
WithURCs" and select "on" or "off" for parameter <tcpWithUrc>.
10.11.2 Configuring Socket Listener
The example assumes that a connection profile has been created as explained in Section 10.1.1 or Section
10.1.2. Keep in mind that if the host is configured as listener another service profile must be left free to be dynam-
ically assigned as Server when the listener receives a connection request from a remote client.
Configure the service profile 4 for use as Socket listener:
Open the Socket service and query the IP address dynamically assigned to the Socket listener:
at^scfg=tcp/withurcs
Query the current setting.
^SCFG: "Tcp/WithURCs","on"
URC mode is enabled (delivery detault).
OK
at^scfg=tcp/withurcs,off
Select polling mode (by switching off URC mode).
^SCFG: "Tcp/WithURCs","off"
Polling mode is accepted.
OK
at^siss=4,srvType,socket
Select service type Socket.
OK
at^siss=4,conId,0
Select connection profile 0.
OK
at^siss=4,address,"socktcp://lis-
tener:65534"
The host specifies its local port 65534 to be used for
the Socket listener service. The local IP address will
be dynamically assigned when the service is opened
with AT^SISO.
OK
at^siso=4
Open the Socket service.
OK
at^siso?
Query the current status of services. All service pro-
files are unused, except for service profile 4 which is
running in listener mode, where <srvState>=3 (lis-
tening) and <socketState>=3 (LISTENER). The
response also indicates the IP address dynamically
assigned to the listener.
^SISO: 0, ""
^SISO: 1, ""
^SISO: 2, ""
^SISO: 3, ""
^SISO: 4, "Socket","3","3","0","0","10.10.0.187:65534","0.0.0.0:0"
^SISO: 6, ""
^SISO: 7, ""
^SISO: 8, ""
^SISO: 9, ""
OK
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10.11.3 Configuring Socket Client for Calling a Socket Listener on
Another Host
The example assumes that a connection profile has been created as explained in Section 10.1.1 or Section
10.1.2.
Configure the client's service profile 1 for calling a Socket listener on another host:
10.11.4 Socket Client Sends Data via TCP Connection (Polling Mode)
The example uses service profile 0 configured for Socket service and TCP.
at^siss=1,srvType,socket
Select service type Socket.
OK
at^siss=1,conId,0
Select connection profile 0.
OK
at^siss=1,address,"socktcp://
10.10.0.187:65534"
The service profile of the client contains the IP
address and the TCP port of the remote host.
OK
AT^SISO=0
The host opens service profile 0.
OK
Note: URC ^SISW:0, 1 does not appear! The host
must poll the service state by means of AT^SISI until
the service is in <srvState> "Up".
AT^SISI=0
^SISI: 0,3,0,0,0,0
The service is still in <srvState> "Connecting".
OK
AT^SISI=0
^SISI: 0,4,0,0,0,0
The service is now in <srvState> "Up" and is
ready to accept data.
OK
AT^SISW=0,10
The host requests to write 10 bytes.
^SISW: 0,10,10
Response that 10 bytes can be sent and are unac-
knowledged.
0123456789
OK
AT^SISW=0,10,1
The host requests to write next 10 bytes and enables
the end-of-data flag.
^SISW: 0,0,10
But the service refuses the request, even the end-of-
data flag remains without effect.
OK
AT^SISW=0,10,1
Next try (polling).
^SISW: 0,10,20
Response that the service accepts 10 bytes and this
data and the previously sent data are unacknowl-
edged.
0123456789
OK
AT^SISW=0,0,0
Polling to request unacknowledged data.
^SISW: 0,0,10
There are 10 bytes still unacknowledged.
OK
AT^SISI=0
Polling for <srvState> change ("Closing" ->
"Down").
^SISI: 0,5,0,20,10,10
20 bytes are transfered via serial interface, 10 bytes
are acknowledged by remote peer, 10 bytes are on
the way.
OK
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10.11.5 Socket client sends data via TCP connection with URCs
The example uses service profile 0 configured for Socket service and TCP.
10.11.6 Configuring and Using FTP Download (URC Mode)
First set up a connection profile as explained in Section 10.1.1 or Section 10.1.2. Enter at least all parameters
which are mandatory for the connection profile.
Configure the service profile 1 for FTP:
Make an FTP connection:
AT^SISI=0
Polling for <srvState> change ("Closing" ->
"Down").
^SISI: 0,6,0,20,20,0
The Service is in state "Down" and all data is con-
firmed by the remote peer.
OK
AT^SISC=0
Closing the Socket service.
OK
AT^SISO=0
The host opens service profile 0.
OK
^SISW: 0,1
Socket service is ready for upload.
AT^SISW=0,10
The host requests to write 10 bytes.
^SISW: 0,10,10
Response that 10 bytes can be sent and are unac-
knowledged.
0123456789
OK
^SISW: 0,1
The URC indicates that the Socket service is ready
to transfer more data. Data of the last AT^SISW
command are transferred to the remote host.
AT^SISW=0,10,1
The host requests to write next 10 bytes and enables
the end-of-data flag to notify that these are the last
10 bytes of the session.
^SISW: 0,10,20
Response that the service accepts 10 bytes and this
data and the previously sent data are unacknowl-
edged.
0123456789
OK
------
Waiting for URC.
^SISW: 0,2
Data transfer has been finished.
AT^SISC=0
Closing the Socket service.
OK
at^siss=1,srvType,ftp
Select service type FTP.
OK
at^siss=1,conId,0
Select connection profile 0.
OK
at^siss=1,address,"ftp://
192.168.1.2;type=d"
Specify FTP address with user and password anon-
ymous.
OK
at^siso=1
Open the service.
OK
Bearer is established, service is getting started.
^SISR: 1, 1
Data is available.
at^sisr=1,1500
Request to read 1500 bytes.
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10.11.7 Configuring and Using FTP Upload (URC Mode)
First set up a connection profile as explained in Section 10.1.1 or Section 10.1.2. Enter at least all parameters
which are mandatory for the connection profile.
Configure the service profile 1 for FTP:
Make an FTP connection:
10.11.8 Configuring SMPT Service Profile
First set up a connection profile as explained in Section 10.1.1 or Section 10.1.2. Enter at least all parameters
which are mandatory for a CSD or GPRS profile. The example uses the connection profile ID 1 and the service
profile ID 9.
^SISR: 1, 50
50 bytes are now available.
hardware
inttest
software
support
systemtest
OK
^SISR: 1, 2
Data transfer finished. No more data available. The
connection to the FTP server is closed.
at^sisc=1
Close the service.
OK
at^siss=1,srvType,ftp
Select service type FTP.
OK
at^siss=1,conId,0
Select connection profile 0.
OK
at^siss=1,address,"ftpput://
myname:mypasswd@192.168.1.2/upload/exam-
ple.bin;type=i"
Specify FTP address with individual user name and
password. The file "example.bin" shall be created on
the FTP server.
OK
at^siso=1
Open the service.
OK
Bearer is established, service is getting started.
^SISW: 1, 1
FTP service is ready for upload.
at^sisw=1,100
Client requests to send 100 bytes.
^SISW: 1,100,100
The write command response confirms that 100
bytes must be transferred now.
0123456789012345678901234567890123456789012
3456789012345678901234567890123456789012345
67890123456789
User data is transferred.
OK
^SISW: 1, 1
URC indicates that the FTP service is ready to trans-
fer more data. Data of the last AT^SISW command is
transferred to the remote host.
at^sisw=1,0,1
No more data available. The file "example.bin" shall
be closed on the FTP server.
OK
^SISW: 1, 2
Data transfer finished successfully. The connection
to the FTP server is closed.
at^sisc=1
Close the FTP service.
at^siss=9,srvType,"Smtp"
Select service type SMTP.
OK
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10.11.9 Sending Email (URC Mode)
This example uses the service profile described in Section 10.11.8.
at^siss=9,alphabet,"1"
Choose ASCII alphabet.
OK
at^siss=9,conId,"1"
Select connection profile 1.
OK
at^siss=9,address,"192.168.1.2"
Specify SMTP server address.
OK
at^siss=9,user,"subscriber1"
Specify sender's user name required for SMTP
authentication.
OK
at^siss=9,passwd,"subscr1"
Specify password used by the sender for SMTP
authentication.
OK
at^siss=9,smFrom,"subscriber1@testdo-
main.com"
Sender's email address.
OK
at^siss=9,smRcpt,"subscriber2@testdo-
main.com"
Recipient's email address.
OK
at^siss=9,smSubj,"Meeting Request Sunday
Morning"
Enter text for subject field.
OK
at^siss=9,smAuth,"1"
Sender name and password can be used for SMTP
authentication.
OK
at^siss?
To check the profile enter the AT^SISS read com-
mand. The response includes the values of all 10
connection profiles. In this example, no values are
set for the profiles 0 through 8. Service profile 9 con-
tains the values specified above and the values auto-
matically assumed by default.
^SISS: 0, "srvType", ""
^SISS: 1, "srvType", ""
^SISS: 2, "srvType", ""
^SISS: 3, "srvType", ""
^SISS: 4, "srvType", ""
^SISS: 6, "srvType", ""
^SISS: 7, "srvType", ""
^SISS: 8, "srvType", ""
^SISS: 9, "srvType", "Smtp"
^SISS: 9, "conId", "1"
^SISS: 9, "alphabet", "1"
^SISS: 9, "address", "192.168.1.2"
^SISS: 9, "user", "subscriber1"
^SISS: 9, "passwd", "*******"
^SISS: 9, "smFrom", "subscriber1@testdomain.com"
^SISS: 9, "smRcpt", "subscriber2@testdomain.com"
^SISS: 9, "smCC", ""
^SISS: 9, "smSubj", "Meeting Request Sunday Morning"
^SISS: 9, "smHdr", ""
^SISS: 9, "tcPort", "25"
Default: TCP port number commonly used for SMTP.
^SISS: 9, "smAuth", "1"
^SISS: 9, "tcpMR", "10"
Default: Number of retransmission attempts for TCP
packets is 10 (= default of AT^SCFG).
^SISS: 9, "tcpOT", "6000"
Default: Timeout before closing outstanding TCP
connection is 6000 sec (= default of AT^SCFG).
OK
at^siso=9
Open the service, i.e. start to send the email.
OK
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10.11.10 Sending Email (Polling Mode)
This example uses the service profile described in Section 10.11.8.
^SISW: 9, 1
The "^SISW" URC indicates that email data can be
transferred.
at^sisw=9,87
The email to be sent has 87 bytes.
^SISW: 9,87,87
The write command response confirms that 87 bytes
are available for transmission.
Good Morning everyone, we are delighted to
announce our next meeting on Sunday morning.
Write the message text.
OK
at^sisw=9,0,1
Set the <eodFlag> to mark the end of the email
body.
^SISW: 9,0,0
The <eodFlag> is accepted by the service.
^SISW: 9,2
The "^SISW" URC confirms that all data is sent suc-
cessfully.
at^sisi=9
Check the connection state of the service profile 9.
^SISI: 9,6,0,87,0,0
The command response confirms that the SMTP
service is in state "6" (Down) and that 87 bytes have
been transferred.
at^sisc=9
Close the service.
OK
at^siso=9
Open the service, i.e. start to send the email.
OK
at^sisw=9,10
Try to write 10 bytes.
^SISW: 9, 10, 0
The service response indicates that 10 bytes can be
written.
Hallo Tom!
Write 10 bytes.
OK
at^sisw=9,10
Try to write 10 bytes.
^SISW: 9, 0, 0
The service response indicates that the service
refuses to accept any data at the moment.
OK
at^sisw0=9,12
Try to write 12 bytes.
^SISW: 9, 12, 0
The service response indicates that 12 bytes can be
written.
Bye Bye Tom!
Write 12 bytes.
OK
at^sisw=9,0,1
Set the <eodFlag> to mark the end of the email
body.
^SISW: 9,0,0
The <eodFlag> is accepted by the service.
OK
at^sisi=9
Check the connection state of service profile 9.
^SISI: 9,5,0,22,0,0
The command response confirms that the SMTP
service is in state "5" (Closing) and that 22 bytes
have been written.
OK
at^sisi=9
Check the connection state of service profile 9.
^SISI: 9,6,0,22,0,0
The command response confirms that the SMTP
service is in state "6" (Down) and that 22 bytes have
been written.
OK
at^sise=9
Check error status of service profile 9.
^SISE: 9,0
The command response confirms that no error
occurred.
OK
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10.11.11 Configuring POP3 Service Profile
First set up a connection profile as explained in Section 10.1.1 or Section 10.1.2. Enter at least all parameters
which are mandatory for a GPRS profile. The example uses the connection profile ID 1 and the service profile
ID 1. The service profile is set up to retrieve a specific email (email number 2).
at^sisc=9
Close the service.
OK
at^siss=1,srvType,"Pop3"
Select service type POP3.
OK
at^siss=1,conId,"1"
Select connection profile 1.
OK
at^siss=1,address,"192.168.1.2"
Specify POP3 server address.
OK
at^siss=1,user,"subscriber1"
Specify recipient's mailbox name.
OK
at^siss=1,passwd,"subscr1"
Password used by recipient for authentication to
POP3 server.
OK
at^siss=1,pCmd,"3"
Command used to retrieve emails.
OK
at^siss=1,pNumber,"2"
Email message number 2 shall be retrieved.
OK
at^siss?
To check the profile enter the AT^SISS read com-
mand. The response includes the values of all 10
connection profiles. Service profile 1 contains the
values specified above and the values automatically
assumed by default.
^SISS: 0, "srvType", ""
^SISS: 1, "srvType", "Pop3"
^SISS: 1, "conId", "1"
^SISS: 1, "alphabet", "0"
Default: Character set enabled with AT+CSCS shall
be used.
^SISS: 1, "address", "192.168.1.2"
^SISS: 1, "user", "subscriber1"
^SISS: 1, "passwd", "*******"
^SISS: 1, "pCmd", "3"
^SISS: 1, "tcPort", "110"
Default: TCP port number commonly used for POP3.
^SISS: 1, "pNumber", "2"
^SISS: 1, "pLength", "0"
Default: Message size shall not be limited.
^SISS: 1, "pDelFlag", "0"
Default: Retrieved message shall not be deleted on
POP3 server.
^SISS: 1, "tcpMR", "10"
Default: Number of retransmission attempts for TCP
packets is 10 (= default of AT^SCFG).
^SISS: 1, "tcpOT", "6000"
Default: Timeout before closing outstanding TCP
connection is 6000 sec (= default of AT^SCFG).
^SISS: 2, "srvType", ""
^SISS: 3, "srvType", ""
^SISS: 4, "srvType", ""
^SISS: 6, "srvType", ""
^SISS: 7, "srvType", ""
^SISS: 8, "srvType", ""
^SISS: 9, "srvType", ""
OK
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10.11.12 Retrieving Email (URC Mode)
This example uses the service profile described in Section 10.11.11.
10.11.13 Retrieving Email (Polling Mode)
This example uses the service profile described in Section 10.11.11.
at^siso=1
Open the service that was created to retrieve email
number 2 from the POP3 server.
OK
^SISR: 1, 1
The "^SISR" indicates that data is available for read-
ing.
at^sisr=1,500
Try to read 500 bytes.
^SISR: 1, 500
Command response indicates that 500 bytes will be
transferred, i.e. there will be no other URC since the
requested length equals the confirmed length.
Return-Path: <subscriber1@testdomain.com>
X-Original-To: subscriber1@testdomain.com
Delivered-To: subscriber2@testdomain.com
Received: from 10.10.0.132 (unknown [10.10.0.132])
by testdomain.com (Postfix) with SMTP id 379321D004
for <subscriber1@testdomain.com>; Tue, 20 Dec 2005 08:00:07 +0100 (CET)
To: subscriber2@testdomain.com
Cc:
From: subscriber1@testdomain.com
Subject: TestMail
Message-Id: <20051220070007.379321D004@testdomain.com >
Date: Tue, 20 Dec 2005 08:00:07 +0100
OK
at^sisr=1,500
Try to read another 500 bytes.
at^sisr=1,78
Command response indicates that only 78 bytes will
transferred.
(CET)
X-UIDL: &lL"!(Z6"!^cl!!1+%"!
Status: RO
Hallo Tom!Bye Bye Tom!
.
Dot indicates end of mail according to RFC 2821.
OK
^SISR: 1, 2
Parameter <urcCauseId> of the "^SISR" URC
confirms that all data is transferred successfully.
at^sisc=1
Close the service.
OK
at^siso=1
Open the service that was created to retrieve email
number 2 from the POP3 server.
OK
at^sisr=1,1000
Try to read 1000 bytes.
^SISR: 1, 0
Command response indicates that currently no data
is available.
OK
at^sisr=1,1000
Again, try to read 1000 bytes.
^SISR: 1, 0
Command response indicates that currently no data
is available.
OK
at^sisr=1,1000
Again, try to read 1000 bytes.
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10.11.14 HTTP POST (Polling Mode)
^SISR: 1, 578
Command response indicates that 578 bytes are
available for reading.
Return-Path: <subscriber1@testdomain.com>
X-Original-To: subscriber1@testdomain.com
Delivered-To: subscriber2@testdomain.com
Received: from 10.10.0.132 (unknown [10.10.0.132])
by testdomain.com (Postfix) with SMTP id 379321D004
for <subscriber1@testdomain.com>; Tue, 20 Dec 2005 08:00:07 +0100 (CET)
To: subscriber2@testdomain.com
Cc:
From: subscriber1@testdomain.com
Subject: TestMail
Message-Id: <20051220070007.379321D004@testdomain.com >
Date: Tue, 20 Dec 2005 08:00:07 +0100 (CET)
X-UIDL: &lL"!(Z6"!^cl!!1+%"!
Status: RO
Hallo Tom!Bye Bye Tom!
.
Dot indicates end of mail according to RFC 2821.
OK
at^sisr=1,1000
Try to read 1000 bytes once again.
^SISR: 1,-2
No more data available to read, i.e. the service has
finished.
OK
at^sisi=1
Check the connection state of service profile 1.
^SISI: 1,6,578,0,0,0
The command response indicates that the POP3
service is in state "6" (Down) and that 578 bytes have
been retrieved.
OK
at^sise=1
Check error status of service profile 1.
^SISE: 1,0
The command response confirms that no error
occurred.
OK
at^sisc=1
Close the service.
OK
at^siss=1,srvType,"Http"
Select service type HTTP.
OK
at^siss=1,conId,1
Select connection profile 1.
OK
at^siss=1,hcMethod,1
Select "Post" method.
OK
at^siss=1,address,"http://192.168.1.3/datafiles/dummy/dummy.txt"
OK
at^siss=1,hcContLen,180
Try to upload 180 bytes.
OK
at^siso=1
Open the service.
OK
at^sisw=1,100
Send the first 100 bytes.
^SISW: 1, 100, 0
OK
at^sisw=1,100
Try to send again 100 bytes.
^SISW: 1, 80, 0
80 bytes are sent.
OK
at^sisw=1,40
Try to write data once again.
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10.11.15 HTTP GET (Polling Mode)
^SISW: 1, 0, 0
No further data available, i.e. the service has fin-
ished.
OK
at^sisi?
^SISI: 1,6,0,180,0,0
The command response indicates that HTTP service
is in state "6" (Down) and that 180 bytes have been
sent.
OK
at^sise=1
Check error status of service profile 1.
^SISE: 1,0
The command response confirms that no error
occurred.
OK
at^sisc=1
Close the service.
OK
at^siss=0,srvType,"Http"
Select service type HTTP.
OK
at^siss=0,conId,1
Select connection profile 1.
OK
at^siss=0,hcMethod,0
OK
at^siss=0,address,http://192.168.1.4/
OK
at^siso=0
OK
at^sisr=0,1500
Start reading data in polling mode.
^SISR: 0, 1264
...DATA...
OK
at^sisr=0,1500
^SISR: 0, 1500
...DATA...
OK
at^sisr=0,1500
^SISR: 0, 602
...DATA...
OK
at^sisr=0,1500
Again, try to read 1500 bytes.
^SISR: 0, -2
Nor more data to read, i.e. the service has finished.
OK
at^sisi?
^SISI: 0,6,0,3366,0,0
The command response indicates that the HTTP
service is in state "6" (Down) and that 3366 bytes
have been read.
OK
at^sise=0
Check error status of service profile 0.
^SISE: 0,0
The command response confirms that no error
occurred.
OK
at^sisc=0
Close the service.
OK
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11. GPRS Commands
This chapter describes AT commands that a TE (Terminal Equipment, e.g. an application running on a controlling
PC) may use to control the MC55i acting as GPRS Mobile Termination (MT). Please use chapter "Using GPRS
AT commands (Examples)" as a first guidance.
11.1 AT+CGACT PDP context activate or deactivate
Syntax
Command Description
The test command is used for requesting information on the supported PDP context activation states.
The read command returns the current activation states for all the defined PDP contexts.
The write command is used to activate or deactivate the specified PDP context(s). After the command has com-
pleted, the MT remains in V.250 command state. If any PDP context is already in the requested state, the state
for that context remains unchanged. If the MT is not GPRS attached when the activation form of the command
is executed, the MT first performs a GPRS attach and then attempts to activate the specified contexts. If no
<cid>s are specified the activation/deactivation form of the command activates/deactivates all defined contexts.
If the MT is not able to activate a context because of a failed attach, the command returns "ERROR" or "+CME
ERROR: unknown" after 385 seconds (timer T3310 expired).
If the MT is attached but is not able to activate a context for more than 160 seconds (timer T3380 expired), com-
mand returns "ERROR" or "+CME ERROR: unspecified GPRS error. In this case AT+CEER returns "+CEER:
51,3,0".
The command should not be used to deactivate a PDP context during the implicit PDP context deactivation pro-
cedure which is started automatically after LCP termination or by dropping the DTR line (if AT&D2 is configured).
For details refer to Section 11.6.1, Automatic deactivation of PDP context during dial-up PPP.
Test Command
AT+CGACT=?
Response(s)
+CGACT: (list of supported <state>s)
OK
Read Command
AT+CGACT?
Response(s)
+CGACT: <cid>, <state>
[+CGACT: <cid>, <state>]
...
OK
Write Command
AT+CGACT=[<state>[, <cid>[, <cid>]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
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Parameter Description
Indicates the state of PDP context activation.
0 deactivated
[1] activated
PDP Context Identifier is a numeric parameter which specifies a particular PDP context definition. The param-
eter is local to the TE-MT interface and is used in other PDP context related commands.
1...2
Notes
•ATH will deactivate any PDP context.
• If the MT is in dedicated mode, the write command returns "+CME ERROR: operation temporary not allowed".
• A maximum of 2 contexts can be activated at the same time, no matter on which interface. Trying to activate
more than 2 contexts will cause "+CME ERROR: operation temporary not allowed". Note that, depending on
the provider, the number of activated contexts may be further restricted. In such cases "+CME ERROR:
unspecified GPRS error" will be returned and AT+CEER returns "+CEER: 50,26,0".
Remember that contexts may be activated implicitly by using the ATD*98# or ATD*99# GPRS compatibility
commands without specifying a <cid>.
• If an activated context will be deactivated without using the command AT+CGACT, then the result code "NO
CARRIER" will be issued to indicate the context deactivation. This happens for example if the context deac-
tivation is forced by the network or if deactivation results from a network deregistration with AT+COPS=2.
<state>(num)
<cid>(num)
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11.2 AT+CGANS Manual response to a network request for PDP con-
text activation
Syntax
Command Description
The write command requests the MT to respond to a network request for GPRS PDP context activation which
has been signaled to the TE by the RING or CRING unsolicited result code. The <response> parameter allows
the TE to accept or reject the request.
Parameter Description
[0] the request is rejected and the MT returns OK to the TE
1 accept and request that the PDP context be activated
a string parameter which indicates the layer 2 protocol to be used (see AT+CGDATA command)
a numeric parameter which specifies a particular PDP context definition (see AT+CGDCONT command).
Note
• If <response> is 1, the following procedure is followed by the MT:
If the <L2P> parameter value is unacceptable to the MT, the MT will return an ERROR or +CME ERROR
response. Otherwise, the MT issues the intermediate result code CONNECT and enters V.250 online data
state.
A <cid> may be specified for use in the context activation request.
During the PDP startup procedure the MT has the PDP type and the PDP address provided by the network
in the Request PDP context activation message. If this is in conflict with the information provided by a spec-
ified <cid>, the command will fail. There will be no conflict, if the PDP type matches exactly and the PDP
address given by the context definition for <cid> is empty or matches exactly with the address specified with
the network PDP context activation message.
The context will be activated using the values for PDP type and address provided by the network, together
with all other information found in the PDP context definition. An APN may or may not be required, depending
on the application.
Test Command
AT+CGANS=?
Response(s)
+CGANS: (list of supported <response>s), (list of supported <L2P>s)
OK
Write Command
AT+CGANS=[<response>[, <L2P>[, <cid>]]]
Response(s)
CONNECT
NO CARRIER
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - +
<response>(num)
<L2P>(str)
<cid>(num)
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If no <cid> is given or if there is no matching context definition, the MT will attempt to activate the context
using the values for PDP type and address provided by the network. The other parameters will be set to their
default values (see AT+CGDCONT).
If activation is successful, data transfer may proceed.
After data transfer is complete, and the layer 2 protocol termination procedure has completed successfully,
the V.250 command state is reentered and the MT returns the final result code OK.
In the event of an erroneous termination or a failure to start up, the V.250 command state is re-entered and
the MT returns the final result code NO CARRIER, or if enabled, +CME ERROR. Attach, activate and other
errors may be reported. It is also an error to issue the AT+CGANS command when there is no pending network
request.
The command may be used in both normal and modem compatibility modes.
MC55i AT Command Set
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11.3 AT+CGATT GPRS attach or detach
Syntax
Command Description
The test command is used for requesting information on the supported GPRS service states.
The read command returns the current GPRS service state.
The write command is used to attach the MT to, or detach the MT from the GPRS service. After the command
has completed, the MT remains in V.250 command state. If the MT is already in the requested state, the com-
mand is ignored and the OK response is returned. Any active PDP contexts will be automatically deactivated
when the attachment state changes to detached.
If the MT is not able to attach for more than 5 minutes, command returns "ERROR" or "+CME ERROR:
unknown", but MT is still trying to attach.
If the MT is not able to detach for more than 1 minute, command returns "ERROR" or "+CME ERROR: unknown",
but MT is still trying to detach. If an attach is issued during a running detach, command returns "ERROR" or
"+CME ERROR: unspecified GPRS error".
Parameter Description
Indicates the state of GPRS attachement.
0(P) detached
[1] attached
Notes
• If the MT is in dedicated mode, write command returns "+CME ERROR: operation temporary not allowed".
• When the module is GPRS attached and a PLMN reselection occurs to a non-GPRS network or to a network
where the SIM is not subscribed to for using GPRS, the resulting GMM (GPRS mobility management) state
according to GSM 24.008 is REGISTERED/NO CELL, meaning that the read command will still show
<state>=1.
Test Command
AT+CGATT=?
Response(s)
+CGATT: (list of supported <state>s)
OK
Read Command
AT+CGATT?
Response(s)
+CGATT: <state>
OK
Write Command
AT+CGATT=[<state>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<state>(num)
MC55i AT Command Set
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11.4 AT+CGAUTO Automatic response to a network request for PDP
context activation
Syntax
Command Description
The test command returns the values of <n> supported by the MT as a compound value.
The write command disables or enables an automatic positive response (auto-answer) to the receipt of a
Request PDP Context Activation message from the network. It also provides control over the use of the V.250
basic commands ATS0, ATA and ATH for handling network requests for PDP context activation.
Parameter Description
0 Disable automatic response for network requests for GPRS PDP context acti-
vation. GPRS network requests are manually accepted or rejected by the
AT+CGANS command.
1 Enable automatic response for network requests for GPRS PDP context acti-
vation. GPRS requests are automatically accepted according to the description
below.
3(&F)(P) Modem compatibility mode. The automatic acceptance of both GPRS and
incoming CSD calls is controlled by the ATS0 command. Manual control uses
the ATA and ATH commands, respectively, to accept or reject GPRS network
requests or incoming CSD calls.
Notes
• It is allowed to have different AT+CGAUTO settings on different interfaces.
• When the AT+CGAUTO=0 command is received, the MT will not perform a GPRS detach if it is attached. Sub-
sequently, when the MT announces a network request for PDP context activation by issuing the URC RING
or CRING, the TE may manually accept or reject the request by issuing the AT+CGANS command or may sim-
ply ignore the network request.
Test Command
AT+CGAUTO=?
Response(s)
+CGAUTO: (list of supported <n>s)
OK
Read Command
AT+CGAUTO?
Response(s)
+CGAUTO: <n>
OK
Write Command
AT+CGAUTO=[<n>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<n>(num)
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• When the AT+CGAUTO=1 command is received, the MT will attempt to perform a GPRS attach if it is not yet
attached. Failure will result in ERROR or, if enabled +CME ERROR being returned to the TE. Subsequently,
the MT announces a network request for PDP context activation by issuing the URC RING to the TE, followed
by the intermediate result code CONNECT. The MT then enters V.250 online data state and follows the same
procedure as it would after having received a +CGANS=1 with no <L2P> or <cid> values specified.
• If a GPRS attach will be initiated by this command and the MT is not able to attach for more than 385 seconds
(timer T3310 expired), command returns with "ERROR" or "+CME ERROR: unknown", but MT is still trying
to attach and the requested automatic mode <n> is in use.
• If a network request for PDP context activation is answered automatically and if another AT command is
issued at the same time on the same interface, then this AT command is not executed. Any response belongs
to the automatic context activation procedure. If the AT command which caused the collision was a circuit
switched data call, the CONNECT response does not belong to this data call but to the GPRS. This can be
detected if ATX is not set to 0. CS data call will issue CONNECT <text>, GPRS will issue CONNECT only.
MC55i AT Command Set
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11.5 AT+CGEREP GPRS event reporting
The write command enables or disables sending of unsolicited result codes, "+CGEV" from MT to TE in the case
of certain events occurring in the GPRS MT or the network. <mode> controls the processing of unsolicited result
codes specified within this command. <bfr> controls the effect on buffered codes when <mode> 1 or 2 is
entered. If a setting is not supported by the MT, ERROR or +CME ERROR: is returned.
Read command returns the current <mode> and buffer settings.
Test command returns the modes and buffer settings supported by the MT as compound values.
Syntax
Unsolicited Result Codes
URC 1
+CGEV: REJECT <PDP_type>, <PDP_addr>
A network request for PDP context activation occurred when the MT was unable to report it to the TE with a
+CRING unsolicited result code and was automatically rejected.
URC 2
+CGEV: NW REACT <PDP_type>, <PDP_addr>, [<cid>]
The network has requested a context reactivation. The <cid> that was used to reactivate the context is pro-
vided if known to the MT.
URC 3
+CGEV: NW DEACT <PDP_type>, <PDP_addr>, [<cid>]
The network has forced a context deactivation. The <cid> that was used to activate the context is provided
if known to the MT.
URC 4
+CGEV: ME DEACT <PDP_type>, <PDP_addr>, [<cid>]
The mobile equipment has forced a context deactivation. The <cid> that was used to activate the context is
provided if known to the MT.
Test Command
AT+CGEREP=?
Response(s)
+CGEREP: (list of supported <mode>s), (list of supported <bfr>s)
OK
Read Command
AT+CGEREP?
Response(s)
+CGEREP: <mode>, <bfr>
OK
Write Command
AT+CGEREP=[<mode>[, <bfr>]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
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URC 5
+CGEV: NW DETACH
The network has forced a GPRS detach.
URC 6
+CGEV: ME DETACH
The mobile equipment has forced a GPRS detach.
URC 7
+CGEV: NW CLASS <class>
The network has forced a change of MS class. The highest available class is reported.
URC 8
+CGEV: ME CLASS <class>
The mobile equipment has forced a change of MS class. The highest available class is reported.
Parameter Description
0(P) Buffer unsolicited result codes in the MT. Currently 3 +CGEV URCs can be
buffered. If MT result code buffer is full, the oldest ones will be discarded. No
codes are forwarded to the TE.
1 Discard unsolicited result codes when MT TE link is reserved (e.g. in on line
data mode); otherwise forward them directly to the TE.
2 Buffer unsolicited result codes in the MT when MT TE link is reserved (e.g. in
on line data mode) and flush them to the TE when MT TE link becomes avail-
able; otherwise forward them directly to the TE. Currently 3 +CGEV URCs can
be buffered. If MT result code buffer is full, the oldest URCs will be discarded.
0 MT buffer of unsolicited result codes defined within this command is cleared
when <mode> 1 or 2 is entered
1 MT buffer of unsolicited result codes defined within this command is flushed to
the TE when <mode> 1 or 2 is entered (OK response will be given before flush-
ing the codes). Buffer is empty afterwards.
Parameter indicates the GPRS mobile class.
“B“ class B
<mode>(num)
<bfr>(num)
<class>(str)
MC55i AT Command Set
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11.6 AT+CGDATA Enter data state
Syntax
Command Description
The test command is used for requesting information on the supported layer 2 protocols to be used between the
TE and MT.
The write command causes the MT to perform all actions which are necessary to establish communication
between the TE and the network using one or more GPRS PDP types. This may include performing a GPRS
attach and one or more PDP context activations. Commands following the AT+CGDATA command in the AT com-
mand line will not be processed by the MT.
If no <cid> is given or if there is no matching context definition, the MT will attempt to activate the context with
PDP type IP and all other context parameters set to their default values (see AT+CGDCONT, AT+CGQREQ,
AT+CGQMIN).
If the <L2P> parameter is omitted, the layer 2 protocol is unspecified and PPP will be used.
If the write command is successful, the MT issues the intermediate result code CONNECT and enters V.250
online data state.
After data transfer is complete, and the layer 2 protocol termination procedure has completed successfully, the
command state is reentered and the MT returns the final result code OK.
If the <L2P> parameter value is unacceptable to the MT, the MT returns ERROR or +CME ERROR.
In the event of erroneous termination or a failure to start up, the command state is reentered and the MT returns
NO CARRIER, or if enabled +CME ERROR.
Parameter Description
Layer 2 protocol to be used between the TE and MT.
[“PPP“] layer 2 protocol PPP
Parameter specifies a particular PDP context definition. The parameter is local to the TE-MT interface and is
used in other PDP context-related commands.
1...2
Test Command
AT+CGDATA=?
Response(s)
+CGDATA: (list of supported <L2P>s)
OK
Write Command
AT+CGDATA=[<L2P>[, <cid>[, <cid>]]]
Response(s)
CONNECT
NO CARRIER
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - +
<L2P>(str)
<cid>(num)
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Notes
• If the MT is in dedicated mode, write command returns "+CME ERROR: operation temporary not allowed".
• It is possible to leave the GPRS data mode and enter the command mode by using the V.250 command +++.
By using the command AT+CGDATA again, the data mode is reentered. Which context is used to return to
data mode, depends on the supplied parameter <cid>.
If no <cid> is specified, this is equivalent to using the V.250 command ATO, which is usable for GPRS con-
nections too. In this case the first context will be used, which is active and already in data mode since it has
been activated (the internal context used for GPRS connection without explicitly specifiying a context identi-
fier has the highest priority).
It is possible to use AT+CGDATA to enter the data mode for a context, which is not yet in data mode since it
has been activated. With ATO this is not possible.
11.6.1 Automatic deactivation of PDP context during dial-up PPP
When using the AT+CGDATA write command or ATD*99# or ATD*98# the MT issues the intermediate result
code CONNECT and enters V.250ter online data state. In V.250 online data state, first some LCP protocol
exchange between MT and TE is performed to set up the PPP link. After successfully establishing the PPP link,
the MT performs the PDP context activation procedure if the context is not already activated. As a result, the MT
is in a "PDP context activated" state within the PLMN, the PPP link is established on the mobile side and the
mobile is ready for IP data transfer.
If the TE wants to close the LCP link the MT may perform an LCP termination request procedure on PPP level.
After this LCP termination procedure the MT deactivates the PDP context automatically and the MT returns to
V.250 command mode and issues the final result code NO CARRIER.
During the implicit PDP context deactivation procedure after LCP termination the TE may change into V.250
command state (e.g. by using +++ or by toggling DTR if AT&D is set to 1) before the result NO CARRIER occurs.
In this case the application should not try to deactivate the PDP context by using the commands AT+CGACT or
ATH. If DTR is configured to disconnect data connections (AT&D2), then the application should not toggle DTR
during the implicit PDP context deactivation and before "NO CARRIER" is received.
MC55i AT Command Set
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11.7 AT+CGDCONT Define PDP Context
Syntax
Command Description
The test command returns supported values as a compound value.
The read command returns the current settings for each defined PDP context.
The write command specifies the parameters for a PDP context identified by the context identifier <cid>. The
number of contexts that may be in a defined state at the same time is given by the range returned by the test
command. A special form of the write command (AT+CGDCONT=<cid>) causes the values for context <cid> to
become undefined.
Parameter Description
PDP Context Identifier
Parameter specifies a particular PDP context definition. The parameter is local to the TE-MT interface and is
used in other PDP context-related commands.
1...2
Packet Data Protocol type
Specifies the type of the packet data protocol.
“IP“ Internet Protocol (IETF STD 5)
Test Command
AT+CGDCONT=?
Response(s)
+CGDCONT: (range of supported<cid>s), <PDP_type>, , , (list of supported <d_comp>s), (list of supported
<h_comp>s)
OK
ERROR
+CME ERROR
Read Command
AT+CGDCONT?
Response(s)
[+CGDCONT: <cid>, <PDP_type>, <APN>, <PDP_addr>, <d_comp>, <h_comp>]
[+CGDCONT: ...]
OK
ERROR
+CME ERROR
Write Command
AT+CGDCONT=[<cid>[, <PDP_type>[, <APN>[, <PDP_addr>]]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<cid>(num)
<PDP_type>(str)
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Access Point Name
The logical name that is used to select the GGSN or the external packet data network. If the value is null or
omitted, then the subscription value will be requested.
Packet Data Protocol address
Identifies the MT in the address space applicable to PDP (e.g. IP V4 address for PDP type IP). If the value is
null or omitted, then a value may be provided by the TE during the PDP startup procedure or, failing that, a
dynamic address will be requested. The read command will continue to return the null string even if an address
has been allocated during the PDP startup procedure. The allocated address may be read using AT+CGPADDR.
Data Compression
Controls the PDP data compression (applicable for Subnetwork Dependent Convergence Protocol (SNDCP)
only) 3GPP TS 44.065
[0] off
Header Compression
Controls the PDP header compression 3GPP TS 44.065, 3GPP TS 25.323
[0] off
Notes
• The MT supports PDP type IP only.
•AT&F and ATZ will undefine every context which is not active or not online.
<APN>(str)
<PDP_addr>(str)
<d_comp>(num)
<h_comp>(num)
MC55i AT Command Set
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11.8 AT+CGPADDR Show PDP address
Syntax
Command Description
The test command returns a list of defined <cid>s.
The write command returns a list of PDP addresses for the specified context identifiers. If no <cid> is specified,
the addresses for all defined contexts are returned.
Parameter Description
A numeric parameter which specifies a particular PDP context definition (see AT+CGDCONT command).
A string that identifies the MT in the address space applicable to the PDP. The address may be static or dynamic.
Note
• If no <cid> is specified, the write command will return a list of all defined contexts.
Test Command
AT+CGPADDR=?
Response(s)
[+CGPADDR: (list of defined <cid>s)]
OK
Write Command
AT+CGPADDR=[<cid>[,<cid>]]
Response(s)
[+CGPADDR: <cid>, <PDP_address>]
[+CGPADDR: <cid>, <PDP_address>]
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<cid>(num)
<PDP_address>(str)
MC55i AT Command Set
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11.9 AT+CGQMIN Quality of Service Profile (Minimum acceptable)
Syntax
Command Description
The test command returns values supported as a compound value. If the MT supports several PDP types, the
parameter value ranges for each PDP type are returned on a separate line.
The read command returns the current settings for each defined context. If no minimum profile was explicitly
specified for a context, simply OK will be returned, but default values will be used for that context.
This command allows the TE to specify a minimum acceptable profile which is checked by the MT against the
negotiated profile returned in the Activate PDP Context Accept message.
The set command specifies a profile for the context identified by the (local) context identification parameter,
<cid>.
A special form of the set command, AT+CGQMIN= <cid> causes the minimum acceptable profile for context
number <cid> to become undefined. In this case no check is made against the negotiated profile.
AT&F and ATZ will undefine the minimum QoS profiles of every context which is not active or not online.
Parameter Description
Parameter specifies a particular PDP context definition. The parameter is local to the TE-MT interface and is
used in other PDP context-related commands.
1...2
Test Command
AT+CGQMIN=?
Response(s)
+CGQMIN: <PDP_type>, (list of supported <precedence>s), (list of supported <delay>s), (list of
supported <reliability>s), (list of supported <peak>s), (list of supported <mean>s)
OK
ERROR
+CME ERROR
Read Command
AT+CGQMIN?
Response(s)
[+CGQMIN: <cid>, <precedence>, <delay>, <reliability>, <peak>, <mean>]
[+CGQMIN: ...]
OK
ERROR
+CME ERROR
Write Command
AT+CGQMIN=[<cid>[, <precedence>[, <delay>[, <reliability>[, <peak>[, <mean>]]]]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<cid>(num)
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Precedence class
[0] network subscribed value
1 High Priority
Service commitments shall be maintained ahead of precedence classes 2 and
3
2 Normal priority
Service commitments shall be maintained ahead of precedence class 3
3 Low priority
Service commitments shall be maintained
Delay class
The delay parameter defines the end-to-end transfer delay incurred in the transmission of SDUs through the
GPRS network(s).
[0] network subscribed value
1..4 SDU size: 128 octets:
SDU size: 1024 octets:
Reliability class
[0] network subscribed value
1 Non real-time traffic, error-sensitive application that cannot cope with data loss
2 Non real-time traffic, error-sensitive application that can cope with infrequent
data loss
3 Non real-time traffic, error-sensitive application that can cope with data loss,
GMM/SM, and SMS
4 Real-time traffic, error-sensitive application that can cope with data loss
5 Real-time traffic, error non-sensitive application that can cope with data loss
Peak throughput class (in octets per second).
[0] network subscribed value
<precedence>(num)
<delay>(num)
Delay Class Mean Transfer Delay 95 percentile
1 (Predictive) <0.5 <1.5
2 (Predictive) <5 <25
3 (Predictive) <50 <250
4 (Best Effort) Unspecified
Delay Class Mean Transfer Delay 95 percentile
1 (Predictive) <0.5 <1.5
2 (Predictive) <5 <25
3 (Predictive) <50 <250
4 (Best Effort) Unspecified
<reliability>(num)
<peak>(num)
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1 Up to 1 000 (8 kbit/s).
2 Up to 2 000 (16 kbit/s).
3 Up to 4 000 (32 kbit/s).
4 Up to 8 000 (64 kbit/s).
5 Up to 16 000 (128 kbit/s).
6 Up to 32 000 (256 kbit/s).
7 Up to 64 000 (512 kbit/s).
8 Up to 128 000 (1024 kbit/s).
9 Up to 256 000 (2048 kbit/s).
Mean throughput class(in octets per hour).
[0] network subscribed value
1 100 (~0.22 bit/s)
2 200 (~0.44 bit/s)
3 500 (~1.11 bit/s)
4 1 000 (~2.2 bit/s)
5 2 000 (~4.4 bit/s)
6 5 000 (~11.1 bit/s)
7 10 000 (~22 bit/s)
8 20 000 (~44 bit/s)
9 50 000 (~111 bit/s)
10 100 000 (~0.22 kbit/s)
11 200 000(~0.44 kbit/s)
12 500 000(~1.11 kbit/s)
13 1 000 000 (~2.2 kbit/s)
14 2 000 000 (~4.4 kbit/s)
15 5 000 000 (~11.1 kbit/s)
16 10 000 000 (~22 kbit/s)
17 20 000 000 (~44 kbit/s)
18 50 000 000 (~111 kbit/s)
31 best effort
Packet Data Protocol Type
“IP“
Notes
• If parameters are not defined, the parameter default values depend on the HLR-stored subscribed default val-
ues.
• Definitions of parameters in GSM 02.60 and GSM 03.60 paragraph 15.2 "Quality of Service Profile".
<mean>(num)
<PDP_type>(str)
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Example
If some of the QoS parameters are omitted, they will keep their current value (or the default value if not specified
so far), e.g.:
AT+CGDCONT=1,"IP"
OK
AT+CGQMIN=
OK
AT+CGQMIN?
OK
AT+CGQMIN=1,0
OK
AT+CGQMIN?
+CGQMIN:1,0,0,0,0,0
OK
AT+CGQMIN=1,0,0,0,1
OK
AT+CGQMIN?
+CGQMIN:1,0,0,0,1,0
OK
AT+CGQMIN=1,1
OK
AT+CGQMIN?
+CGQMIN:1,1,0,0,1,0
OK
MC55i AT Command Set
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11.10 AT+CGQREQ Quality of Service Profile (Requested)
Syntax
Command Description
The test command returns values supported as a compound value. If the MT supports several PDP types, the
parameter value ranges for each PDP type are returned on a separate line.
The read command returns the current settings for each defined context. If no requested profile was explicitly
specified for a context, simply OK will be returned, but default values will be used for that context.
This command allows the TE to specify a Quality of Service Profile that is used when the MT sends an Activate
PDP Context Request message to the network.
The set command specifies a profile for the context identified by the (local) context identification parameter,
<cid>.
A special form of the set command, +CGQREQ=<cid> causes the requested profile for context number <cid>
to become undefined.
AT&F and ATZ will undefine the QoS profiles of every context which is not active or not online.
Parameter Description
Parameter specifies a particular PDP context definition. The parameter is local to the TE-MT interface and is
used in other PDP context-related commands.
1...2
Precedence class
[0] network subscribed value
1 High Priority
Service commitments shall be maintained ahead of precedence classes 2 and
3
Test Command
AT+CGQREQ=?
Response(s)
+CGQREQ: <PDP_type>, (list of supported <precedence>s), (list of supported <delay>s), (list of
supported <reliability>s), (list of supported <peak>s), (list of supported <mean>s)
OK
Read Command
AT+CGQREQ?
Response(s)
[+CGQREQ: <cid>, <precedence>, <delay>, <reliability>, <peak>, <mean>]
[+CGQREQ: ...]
Write Command
AT+CGQREQ=[<cid>[, <precedence>[, <delay>[, <reliability>[, <peak>[, <mean>]]]]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<cid>(num)
<precedence>(num)
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2 Normal priority
Service commitments shall be maintained ahead of precedence class 3
3 Low priority
Service commitments shall be maintained
Delay class
This parameter defines the end-to-end transfer delay incurred in the transmission of SDUs through the GPRS
network(s).
[0] network subscribed value
1..4 with SDU size = 128 octets:
with SDU size = 1024 octets:
Reliability class
[0] network subscribed value
1 Non real-time traffic, error-sensitive application that cannot cope with data loss
2 Non real-time traffic, error-sensitive application that can cope with infrequent
data loss
3 Non real-time traffic, error-sensitive application that can cope with data loss,
GMM/SM, and SMS
4 Real-time traffic, error-sensitive application that can cope with data loss
5 Real-time traffic, error non-sensitive application that can cope with data loss
Peak throughput class
in octets per second
[0] network subscribed value
1 Up to 1 000 (8 kbit/s)
2 Up to 2 000 (16 kbit/s)
3 Up to 4 000 (32 kbit/s)
4 Up to 8 000 (64 kbit/s)
5 Up to 16 000 (128 kbit/s)
<delay>(num)
Delay Class Mean Transfer Delay 95 percentile
1 (Predictive) <0.5 <1.5
2 (Predictive) <5 <25
3 (Predictive) <50 <250
4 (Best Effort) Unspecified -
Delay Class Mean Transfer Delay 95 percentile
1 (Predictive) <0.5 <1.5
2 (Predictive) <5 <25
3 (Predictive) <50 <250
4 (Best Effort) Unspecified -
<reliability>(num)
<peak>(num)
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6 Up to 32 000 (256 kbit/s)
7 Up to 64 000 (512 kbit/s)
8 Up to 128 000 (1024 kbit/s)
9 Up to 256 000 (2048 kbit/s)
Mean throughput class
in octets per hour
[0] network subscribed value
1 100 (~0.22 bit/s)
2 200 (~0.44 bit/s)
3 500 (~1.11 bit/s)
4 1 000 (~2.2 bit/s)
5 2 000 (~4.4 bit/s)
6 5 000 (~11.1 bit/s)
7 10 000 (~22 bit/s)
8 20 000 (~44 bit/s)
9 50 000 (~111 bit/s)
10 100 000 (~0.22 kbit/s)
11 200 000(~0.44 kbit/s)
12 500 000(~1.11 kbit/s)
13 1 000 000 (~2.2 kbit/s)
14 2 000 000 (~4.4 kbit/s)
15 5 000 000 (~11.1 kbit/s)
16 10 000 000 (~22 kbit/s)
17 20 000 000 (~44 kbit/s)
18 50 000 000 (~111 kbit/s)
31 best effort
Packet Data Protocol type
“IP“
Notes
• If parameters are not defined, the parameter default values depend on the HLR-stored subscribed default val-
ues.
• Definitions of parameters in GSM 02.60 and GSM 03.60 paragraph 15.2 "Quality of Service Profile".
Example
If some of the QoS parameters are omitted, they will keep their current value (or the default value if not specified
so far), e.g.:
<mean>(num)
<PDP_type>(str)
AT+CGDCONT=1,"IP"
OK
AT+CGQREQ=
OK
MC55i AT Command Set
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AT+CGQREQ?
OK
AT+CGQREQ=1,0
OK
AT+CGQMIN?
+CGQREQ:1,0,0,0,0,0
OK
AT+CGQREQ=1,0,0,0,1
OK
AT+CGQREQ?
+CGQREQ:1,0,0,0,1,0
OK
AT+CGQREQ=1,1
OK
AT+CGQREQ?
+CGQREQ:1,1,0,0,1,0
OK
MC55i AT Command Set
11.11 AT+CGREG s
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11.11 AT+CGREG GPRS Network Registration Status
AT+CGREG write command enables presentation of URC "+CGREG: <stat>" when <n>=1 and ME's GPRS net-
work registration status changes.
AT+CGREG read command queries the current URC presentation status and <stat> which shows whether the
network has currently indicated the registration of the ME.
Syntax
Unsolicited Result Code
+CGREG: <stat>
Indicates a change in the ME's GPRS network registration status.
Parameter Description
0(&F)(P) Disable network registration unsolicited result code
1 Enable network registration URC "+CGREG: <stat>"
0 Not registered, ME is not currently searching an operator to register to. The ME
is in GMM state GMM-NULL or GMM-DEREGISTERED-INITIATED.
GPRS service is disabled, the ME is allowed to attach to GPRS if requested by
the user.
1 Registered, home network. The ME is in GMM state GMM-REGISTERED or
GMM-ROUTING-AREA-UPDATING-INITIATED INITIATED on the home
PLMN
Test Command
AT+CGREG=?
Response(s)
+CGREG: (list of supported <n>s)
OK
Read Command
AT+CGREG?
Response(s)
+CGREG: <n>, <stat>
OK
Write Command
AT+CGREG=[<n>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<n>(num)
<stat>(num)
MC55i AT Command Set
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2 Not registered, but ME is currently trying to attach or searching an operator to
register to. The ME is in GMM state GMM-DEREGISTERED or GMM-REGIS-
TERED-INITIATED. The GPRS service is enabled, but an allowable PLMN is
currently not available. The ME will start a GPRS attach as soon as an allow-
able PLMN is available.
3 Registration denied. The ME is in GMM state GMM-NULL. The GPRS service
is disabled, the ME is not allowed to attach to GPRS if requested by the user.
4 Unknown
5 Registered, roaming. The ME is in GMM state GMM-REGISTERED or GMM-
ROUTING-AREA-UPDATING-INITIATED on a visited PLMN.
Note
• When the module is GPRS attached and a PLMN reselection occurs to a non-GPRS network or to a network
where the SIM is not subscribed to for using GPRS, the resulting GMM (GPRS mobility management) state
according to GSM 24.008 is REGISTERED/NO CELL, meaning that the read command will still show
<stat>=1 or <stat>=5.
MC55i AT Command Set
11.12 AT+CGSMS s
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11.12 AT+CGSMS Select service for MO SMS messages
Syntax
Command Description
The test command is used for requesting information on which services and service preferences can be set by
using the AT+CGSMS write command
The read command returns the currently selected service or service preference.
The write command is used to specify the service or service preference that the MT will use to send MO SMS
messages. If parameter <service> is not given, the current value remains unchanged.
Parameter Description
A numeric parameter which indicates the service or service preference to be used. Parameter is global for all
interfaces and volatile.
0GPRS
1 Circuit switched
2 GPRS preferred (use circuit switched SMS transfer if mobile is not GPRS
attached)
3(&F)(P) Circuit switched preferred (use GPRS if circuit switched is not available)
Note
• Sending SMS via GPRS is only possible when mobile is attached using AT+CGATT.
Test Command
AT+CGSMS=?
Response(s)
+CGSMS: (list of supported <service>s)
OK
Read Command
AT+CGSMS?
Response(s)
+CGSMS: <service>
OK
Write Command
AT+CGSMS=[<service>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<service>(num)
MC55i AT Command Set
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11.13 AT^SGAUTH Set type of authentication for PPP connection
Syntax
Parameter Description
Indicates types of supported authentication.
0none
1 PAP
2 CHAP
3(&F)(P) PAP and CHAP
Test Command
AT^SGAUTH=?
Response(s)
^SGAUTH: (list of supported <auth>s)
OK
ERROR
+CME ERROR
Read Command
AT^SGAUTH?
Response(s)
^SGAUTH: <auth>
OK
ERROR
+CME ERROR
Write Command
AT^SGAUTH=<auth>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<auth>(num)
MC55i AT Command Set
11.14 AT^SGCONF s
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11.14 AT^SGCONF Configuration of GPRS related Parameters
Syntax
Parameter Description
The maximum number of octets in an information field of Unnumbered (U) frames.
0 No negotiation with network (500 will be used).
140...1520(P) Lower values diminish performance.
GPRS Multislot Class. The value can be one of the classes indicated with the Test command. The value set is
volatile and powerup value is the maximum allowed.
Notes
• +CME ERROR: invalid index: Parameter is out of range
• +CME ERROR: operation temporary not allowed: The command is blocked as long as GPRS is already in
use (as long as mobile is GPRS attached).
• Writing to user profile with AT&W and restoring with AT&F are not supported.
Test Command
AT^SGCONF=?
Response(s)
^SGCONF: (list of supported <llc_pdu_length_U>s), (list of supported <GPRS msclass>es)
OK
Read Command
AT^SGCONF?
Response(s)
^SGCONF: <llc_pdu_length_U>, <GPRS msclass>
OK
Write Command
AT^SGCONF=[<llc_pdu_length_U>][, [<GPRS msclass>]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<llc_pdu_length_U>(num)
<GPRS msclass>(num)
MC55i AT Command Set
11.15 ATA s
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11.15 ATA Manual response to a network request for PDP context acti-
vation
The V.250 ATA command may be used to accept a network request for a PDP context activation announced by
the unsolicited result codes "RING" or "+CRING: GPRS". The MT responds with CONNECT, enters V.250 online
data state and follows the same procedure as it would after having received a AT+CGANS=1 with no <L2P> or
<cid> values specified.
If you try to answer a request which is no longer present or which is already answered by another instance, NO
CARRIER is returned.
Syntax
Exec Command
ATA
Response(s)
CONNECT
NO CARRIER
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - +
MC55i AT Command Set
11.16 ATD*99# s
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11.16 ATD*99# Request GPRS service
This command causes the MT to perform whatever actions are necessary to establish a communication between
the TE and the external PDN.
The V.250 'D' (Dial) command causes the MT to enter the V.250 online data state and, with the TE, to start the
specified layer 2 protocol. No further commands may follow on the AT command line. GPRS attachment and
PDP context activation procedures may take place prior to or during the PDP startup if they have not already
been performed using the AT+CGATT and AT+CGACT commands. If the context to be used is already activated,
it will be deactivated first. This ensures that the right context parameters will be used (e.g. QoS changes since
the last context activation or the called address specified by ATD*99#).
Examples on how to use this command are provided in "Section 11.20, Using GPRS AT commands (Examples)".
To confirm acceptance of the command before entering the V.250 online data state command will respond with
CONNECT.
When the layer 2 protocol has terminated, either as a result of an orderly shut down of the PDP or an error, the
MT enters V.250 command state and returns NO CARRIER (for details refer to Section 11.6.1, Automatic deac-
tivation of PDP context during dial-up PPP).
Syntax
Parameter Description
IP V4 address in the form w.x.y.z, which identifies the called party; if it is provided, the MT will automatically set
up a virtual call to the specified address after the context has been activated. This parameter is currently not
used and needs not to be specified.
Layer 2 protocol to be used between the TE and MT.
“PPP“ layer 2 protocol PPP
“1“ layer 2 protocol PPP
Parameter specifies a particular PDP context definition (see AT+CGDCONT command). If no context is specified,
an internal context with default properties is used (see AT+CGDCONT, AT+CGQREQ and AT+CGQMIN).
1...2
Notes
• If MC55i is in dedicated mode, command returns "+CME ERROR: phone busy".
•ATD is used as a standard V.250 AT command, too.
• When using the command on the second serial interface please see also Section 1.9.
Exec Command
ATD*99[* [<called_address>][* [<L2P>][* [<cid>]]]]#
Response(s)
CONNECT
NO CARRIER
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - +
<called_address>(str)
<L2P>(str)
<cid>(num)
MC55i AT Command Set
11.17 ATD*98# s
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11.17 ATD*98# Request GPRS IP service
This command causes the MT to perform whatever actions are necessary to establish a communication between
the TE and the external PDN.
The V.250 'D' (Dial) command causes the MT to enter the V.250 online data state and, with the TE, to start the
layer 2 protocol.
GPRS attachment and PDP context activation procedures may take place prior to or during the PDP startup if
they have not already been performed using the AT+CGATT and AT+CGACT commands. If the context to be used
is already activated, it will be deactivated first. This ensures that the right context parameters will be used (e.g.
QoS changes since the last context activation).
To confirm acceptance of the command before entering the V.250 online data state command will respond with
CONNECT.
When the layer 2 protocol has terminated, either as a result of an orderly shut down of the PDP or an error, the
MT enters V.250 command state and returns NO CARRIER (for details refer to Section 11.6.1, Automatic deac-
tivation of PDP context during dial-up PPP).
Syntax
Parameter Description
Parameter specifies a particular PDP context definition (see AT+CGDCONT command). If no context is specified,
an internal context with default properties is used (see AT+CGDCONT, AT+CGQREQ and AT+CGQMIN).
1...2
Notes
• If MC55i is in dedicated mode, command returns "+CME ERROR: phone busy".
•ATD is used as a standard V.250 AT command, too.
• When using the command on the second serial interface please see also Section 1.9.
Exec Command
ATD*98[* <cid>]#
Response(s)
CONNECT
NO CARRIER
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - +
<cid>(num)
MC55i AT Command Set
11.18 ATH s
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11.18 ATH Manual rejection of a network request for PDP context acti-
vation
The V.250 ATH command may be used to deactivate all PDP contexts which are active or online on the same
interface. This command should not be used to deactivate PDP contexts during the implicit PDP context deacti-
vation procedure which is started automatically after LCP termination or by dropping the DTR line (if AT&D2 is
configured). For details refer to Section 11.6.1, Automatic deactivation of PDP context during dial-up PPP.
The ATH command may also be used to reject a network request for PDP context activation announced by the
unsolicited result codes "RING: GPRS" or "+CRING: GPRS".
Syntax
Notes
• In contrast to GSM 07.07 it is possible to cancel a connection with ATH after a break. This is done for com-
patibility reasons due to the "dial-up network" drivers of Microsoft Windows.
•ATH is used as a standard V.250 AT command, too.
• If ATH is used to reject a network request for PDP context activation, then other PDP contexts on the same
interface which are active or online will not be deactivated.
Exec Command
ATH
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + ± + ± ± - - -
MC55i AT Command Set
11.19 ATS0 s
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11.19 ATS0 Automatic response to a network request for PDP context
activation
The V.250 ATS0=<n> (Automatic answer) command may be used to turn off (n=0) and on (n>0) the automatic
response to a network request for a PDP context activation. See also "3GPP TS 27.007 (GSM 07.07): AT com-
mand set for User Equipment (UE)".
When the ATS0=<n> (<n> > 0) command is received, the MT will attempt to perform a GPRS attach if not yet
attached and if configured to do so (see AT^SCFG, parameter <gs0aa>). Subsequently, the MT will announce
a network request for PDP context activation by issuing the URC RING or CRING to the TE, followed by the inter-
mediate result code CONNECT. The MT then enters V.250 online data state and follows the same procedure as
it would after receiving a AT+CGANS=1 command with no <L2P> or <cid> values specified.
ATS0=0 does not perform an automatic GPRS detach.
Syntax
Parameter Description
000(&F) Disables automatic answer mode.
001-255 Enables automatic answering after specified number of rings.
Notes
• If different settings are used on each interface, and a request for PDP context activation is received, the inter-
face 'wins' which is idle and uses the smallest ATS0 value.
• When a network request for PDP context activation is answered automatically and another AT command is
issued at the same time on the same interface then this AT command will not be executed. Any response
relates to the automatic context activation procedure. If the AT command which caused the collision was a
CS data call, the CONNECT response does not pertain to this data call but to GPRS. This can be detected if
ATX is not set to 0. The CS data call will issue CONNECT <text>, GPRS will issue CONNECT only.
• A network request for PDP context activation has a maximum duration of approximately 40 seconds (for
details see GSM 04.08). A RING/CRING URC is issued every 5 seconds, so setting parameter <n> to values
greater than 7 will not allow a successful context activation and is not recommended.
• Automatic GPRS attach will not be performed on recalling a stored user profile with ATZ or on power-up, even
though a value <n> greater than 0 was stored in the user profile with AT&W.
• If AT^SCFG="GPRS/ATS0/withAttach","on" is selected, but the automatic GPRS attach attempt fails (e.g. the
network rejects the attach request), the ATS0 write command ends up with "ERROR" or "+CME ERROR:
unknown" after approx. 5 minutes, though the new <n> value takes effect. This is necessary because ATS0
is used for circuit switched calls too.
• ATS0 write command is PIN protected.
Read Command
ATS0?
Response(s)
<n>
OK
Write Command
ATS0=<n>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 ± + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
11.20 Using GPRS AT commands (Examples) s
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11.20 Using GPRS AT commands (Examples)
Examples
EXAMPLE 1
Defining and using a Context Definition ID (CID):
Every time a CID is used as a parameter for a GPRS command the CID has to be defined before by using
the AT+CGDCONT command. To get the parameter of a CID use the AT+CGDCONT read option. If the response
of 'AT+CGDCONT?' is OK only, there is no CID defined.
All parameters of the CID are initiated by NULL or not present values, and the CID itself is set to be undefined.
To define a CID use the AT+CGDCONT command with at least one CID parameter. At the moment the mobile
supports CID 1 and CID 2 by using the AT+CGDCONT command.
Define CID 1 and set the PDP type to IP, access point name and IP address are not set:
Define CID 2 and sets PDP type, APN and IP addr:
A following read command will respond:
Set the CID 1 to be undefined:
A following read command will respond:
AT+CGDCONT?
OK
There is no CID defined
AT+CGDCONT=1,"IP"
OK
AT+CGDCONT=2,"IP", "internet.t-d1.gprs", 111.222.123.234
OK
AT+CGDCONT?
+CGDCONT:1,"IP","","",0,0
+CGDCONT:2,"IP","internet.t-d1.gprs",111.222.123.234
OK
AT+CGDCONT=1
OK
AT+CGDCONT?
+CGDCONT:2,"IP","internet.t-d1.gprs",111.222.123.234
OK
MC55i AT Command Set
11.20 Using GPRS AT commands (Examples) s
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EXAMPLE 2
Quality of Service (QoS) is a special parameter of a CID which consists of several parameters itself.
The QoS consists of
- the precedence class
- the delay class
- the reliability class
- the peak throughput class
- the mean throughput class
and is divided in "requested QoS" and "minimum acceptable QoS".
All parameters of the QoS are initiated by default to the "network subscribed value (= 0)" but the QoS itself is
set to be undefined. To define a QoS use the AT+CGQREQ or AT+CGQMIN command.
Overwrite the precedence class of QoS of CID 1 and set the QoS of CID 1 to be present:
A following read command will respond:
All QoS values of CID 1 are set to network subscribed now, except precedence class which is set to 2. Now
set the QoS of CID 1 to not present:
Once defined, the CID it can be activated. To activate CID 2 use:
If the CID is already active, the mobile responds OK at once.
If no CID and no STATE is given, all defined CIDs will be activated by:
If no CID is defined the mobile responds +CME ERROR: invalid index
Remark: If the mobile is NOT attached by AT+CGATT=1 before activating, the attach is automatically done by
the AT+CGACT command.
After defining and activating a CID it may be used to get online by:
The mobile supports Layer 2 Protocol (L2P) PPP only.
Remark: If the mobile is NOT attached by AT+CGATT=1 and the CID is NOT activated before connecting,
attaching and activating is automatically done by the AT+CGDATA command.
AT+CGQREQ=1,2
OK
AT+CGQREQ?
+CGQREQ: 1,2,0,0,0,0
OK
AT+CGQREQ=1
OK
AT+CGACT=1,2
OK
AT+CGACT=
OK
AT+CGDATA="PPP",1
CONNECT
The mobile is connected using the parameters of CID 1.
AT+CGDATA=
CONNECT
The mobile is connected using default parameters (<L2P>="PPP" and
<cid> as described for command AT+CGDATA).
MC55i AT Command Set
11.21 Using the GPRS dial command ATD s
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11.21 Using the GPRS dial command ATD
Example
In addition to the GPRS AT commands you can use the "D" command to dial into to the GPRS network.
There are two GPRS Service Codes for the ATD command: Values 98 and 99.
Examples:
ATD*99#
CONNECT
Establish a connection by service code 99.
ATD*99*123.124.125.126*PPP*1#
CONNECT
Establish a connection by service code 99, IP
address 123 and L2P = PPP and using CID 1.
The CID has to be defined by AT+CGDCONT.
ATD*99**PPP#
CONNECT
Establish a connection by service code 99 and L2P
= PPP.
ATD*99***1#
CONNECT
Establish a connection by service code 99 and using
CID 1.
ATD*99**PPP*1#
CONNECT
Establish a connection by service code 99 and L2P
= PPP and using CID 1. The CID has to be defined
by AT+CGDCONT.
ATD*98#
CONNECT
Establish a connection by service code 98.
ATD*98*1#
CONNECT
Establish an IP connection by service code 98 using
CID 1. The CID has to be defined by AT+CGDCONT.
MC55i AT Command Set
12. FAX Commands s
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12. FAX Commands
This chapter describes the AT commands used for fax communications.
If the ME is acting as a fax modem for a PC based fax application (e.g. "WinFax") it is necessary to select the
proper Service Class (Fax Class) provided by the ME. The ME reports its Service Class capabilities, i.e. the cur-
rent setting and the range of services available. This is provided by the AT+FCLASS command.
Service Classes supported by the ME:
The following AT commands are dummy commands:
AT+FAA Auto Answer mode
AT+FECM Error Correction Mode control
AT+FLNFC Page Length format conversion
AT+FLPL Indicate document available for polling
AT+FMINSP Minimum Phase C speed
AT+FRBC Phase C data receive byte count
AT+FREL Phase C received EOL alignment
AT+FSPL Enable polling
AT+FTBC Phase C data transmit byte count
AT+FWDFC Page width format conversion
Invoking these commands will not cause ERROR result codes, but these commands have no functionality.
12.1 FAX parameters
Below you can find a summary of parameters used by the fax-specific AT commands and responses described
in this chapter. Please note that parameter <mod> is dedicated to Fax Class 1 only. All other parameters listed
below are for Fax Class 2 only.
Parameter Description
Modulation scheme
To find out which value is actually supported by <mod> use the test commands while the ME is off-hook.
3 V21 Ch2 - 300 bps
24 V.27ter - 2400 bps
48 V.27ter - 4800 bps
72 V.29 - 7200 bps
96 V.29 - 9600 bps
Binary File Transfer Mode
[0] Disable BFT
1 Enable BFT
AT+FCLASS Parameter Service class Reference, Standard
0Data modem e.g. TIA/EIA-602 or ITU V.250
1Service Class 1 EIA/TIA-578-A
2Manufacturer specific This document and EIA PN-2388
(draft)
<mod>(num)
<bf>(num)
MC55i AT Command Set
12.1 FAX parameters s
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Bit Rate
0 2400 bps, V.27ter
1 4800 bps, V.27ter
2 7200 bps, V.29
[3] 9600 bps, V.29
Data Compression Format
[0] 1-D modified Huffman
1 2-D modified read
2 2-D uncompressed mode
Error Correction Mode
[0] Disable ECM
1 Enable ECM, 64 bytes/frame
2 Enable ECM, 256 bytes/frame
Page Length
0 A4, 297mm
1 B4, 364mm
[2] Unlimited length
Scan Time/Line
[0] 0 ms (at VR= normal)
15 ms
210 ms
310 ms
420 ms
520 ms
640 ms
740 ms
Vertical Resolution
0 Normal, 98 lpi
[1] Fine, 196 lpi
<br>(num)
<df>(num)
<ec>(num)
<ln>(num)
<st>(num)
<vr>(num)
MC55i AT Command Set
12.1 FAX parameters s
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Page Width
[0] 1728 pixels in 215mm
1 2048 pixels in 255 mm
2 2432 pixels in 303 mm
3 1216 pixels in 151 mm
4 864 pixels in 107 mm
Note
• The host application is not required to support all values of the parameters listed above. Depending on the
application design it may be sufficient to implement only the default values. See T.31, T.32 and EIA PN-2388
specifications for further advice.
12.1.1 Summary of Fax Class 2 URCs defined by EIA PN-2388
The following URCs are messages indicated in communication only. The URCs are not user definable.
Table 12.1: Summary of Fax Class 2 URCs defined by EIA PN-2388
<wd>(num)
URC Meaning
+FCON Indicates connection with a fax machine.
+FCSI: <id> Reports the remote ID, called station ID.
+FDCS: <vr>, <br>, <wd>, <ln>, <df>,
<ec>, <bf>, <st>
Reports current session parameters (refer to EIA PN-2388, Table
3.10).
+FDIS: <vr>, <br>, <wd>, <ln>, <df>, <ec>,
<bf>, <st>
Reports the remote station capabilities (refer to EIA PN-2388,
Table 3.10).
+FET: <stat> Post page message. Indicates whether or not further pages or
documents are pending.
+FHNG: <stat> Reports that call has been terminated and indicates status.
+FNSF: "<param>" Reports non-standard setup frame.
+FPTS: "<stat>" Reports the status of received pages.
+FTSI: "<id>" Reports the remote ID, transmit station ID.
MC55i AT Command Set
12.2 AT+FBADLIN s
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12.2 AT+FBADLIN Bad Line Threshold
This command defines the Copy-Quality-OK-threshold. If <badlin> consecutive lines have pixel count errors
in normal resolution (98 dpi) mode, then the copy quality is unacceptable. If <badlin> * 2 consecutive lines have
pixel count errors in fine resolution (196 dpi) mode, then the copy quality is unacceptable. "Copy Quality Not OK"
occurs if either the error percentage is too high or too many consecutive lines contain errors. A value of 0 implies
that error checking is not present or disabled.
Syntax
Parameter Description
Bad lines
0...10(P)...255
Note
• Used for Fax Class 2 only.
Read Command
AT+FBADLIN?
Response(s)
<badlin>
OK
Write Command
AT+FBADLIN=<badlin>
Response(s)
OK
If error is related to ME functionality
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<badlin>(num)
MC55i AT Command Set
12.3 AT+FBADMUL s
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12.3 AT+FBADMUL Error Threshold Multiplier
This command defines the "Copy-Quality-OK" multiplier. The number of lines received with a bad pixel count is
multiplied by this number. If the result exceeds the total number of lines on the page the error rate is considered
too high. A threshold multiplier value of 20 corresponds to a 5 per cent error rate. A value of 0 implies that error
checking is not present or disabled.
Syntax
Parameter Description
0...20(P)...255
Note
• Used for Fax Class 2 only.
Read Command
AT+FBADMUL?
Response(s)
<badmul>
OK
Write Command
AT+FBADMUL=<badmul>
Response(s)
OK
If error is related to ME functionality:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<badmul>(num)
MC55i AT Command Set
12.4 AT+FBOR s
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12.4 AT+FBOR Query data Bit Order
This command queries the bit order for the receive mode. The mode is set by the ME depending on the selected
Service Class, see "AT+FCLASS Fax: Select, read or test service class".
Syntax
Parameter Description
bit order modes
0 Direct bit order for both Phase C and for Phase B/D data.
[1] Reversed bit order for Phase C data, direct Bit Order for Phase B/D data.
Note
• Used for Fax Class 2 only.
Test Command
AT+FBOR=?
Response(s)
(list of supported <bor>s)
OK
Read Command
AT+FBOR?
Response(s)
<bor>
OK
Write Command
AT+FBOR=<bor>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<bor>(num)
MC55i AT Command Set
12.5 AT+FCIG s
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12.5 AT+FCIG Query or set the Local Polling ID
Syntax
Parameter Description
Local Polling ID string, max. length and possible content as reported by test command. Default value is empty
string ("").
Notes
• Used for Fax Class 2 only.
• See also AT+FLID Query or set the Local ID setting capabilities.
Test Command
AT+FCIG=?
Response(s)
(max. length of Local Polling ID string) (range of supported ASCII character values)
OK
Read Command
AT+FCIG?
Response(s)
<id>
OK
Write Command
AT+FCIG=<id>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<id>(num)
MC55i AT Command Set
12.6 AT+FCLASS s
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12.6 AT+FCLASS Fax: Select, read or test service class
AT+FCLASS sets the ME to a particular mode of operation (data, fax). This allows the ME to process information
in a manner suitable for that type of information.
Syntax
Parameter Description
0(&F) Data (e.g. EIA/TIA-602 or ITU V.250)
1 Fax class 1 (EIA/TIA-578-A, Service Class 1)
2 Fax class 2 (EIA/TIA SP-2388, an early draft version of EIA/TIA-592-A - Ser-
vice class 2.1)
Notes
• Using Error Correcting Mode (ECM) when sending FAXes over GSM should be avoided.
• If <n> is set to 1 or 2, all incoming calls will be answered as fax calls when ATA is issued on multiplexer chan-
nel 1 resp. ASC0. For calls explicitly signaled as voice or data calls, this procedure will fail with result code
"NO CARRIER", but the incoming call will continue to ring.
It is possible to change the setting of <n> to 0 while the call is ringing, and accept the call afterwards with ATA.
Test Command
AT+FCLASS=?
Response(s)
(list of supported <n>s)
OK
Read Command
AT+FCLASS?
Response(s)
<n>
OK
Write Command
AT+FCLASS=<n>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA/TIA-592-A - + - + - - - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
12.7 AT+FCQ s
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12.7 AT+FCQ Copy Quality Checking
This command controls Copy Quality checking when receiving a fax.
Syntax
Parameter Description
0 No copy quality checking. The ME will generate Copy Quality OK (MCF)
responses to complete pages.
[1] ME can check 1-D phase data. The connected application must check copy
quality for 2-D phase C data.
Note
• Used for Fax Class 2 only.
Test Command
AT+FCQ=?
Response(s)
(list of supported copy quality checking <cq>s)
OK
Read Command
AT+FCQ?
Response(s)
<cq>
OK
Write Command
AT+FCQ=<cq>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<cq>(num)
MC55i AT Command Set
12.8 AT+FCR s
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12.8 AT+FCR Capability to Receive
Syntax
Parameter Description
[0] ME will not receive message data. This value can be used when the application
has insufficient storage. The ME can send and can be polled for a file.
1 ME can receive message data.
Note
• Used for Fax Class 2 only.
Write Command
AT+FCR=<cr>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<cr>(num)
MC55i AT Command Set
12.9 AT+FDCC s
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12.9 AT+FDCC Query or set capabilities
This command allows the connected application to sense and constrain the capabilities of the facsimile DCE
(=ME), from the choices defined in CCITT T.30 Table 2.
Syntax
Notes
• For further information see AT+FDIS.
• Used for Fax Class 2 only.
Test Command
AT+FDCC=?
Response(s)
(list of <vr>s), (list of <br>s), (list of <wd>s), (list of <ln>s), (list of <df>s), (list of <ec>s), (list of <bf>s),
(list of <st>s)
OK
Read Command
AT+FDCC?
Response(s)
<vr>, <br>, <wd>, <ln>, <df>, <ec>, <bf>, <st>
OK
Write Command
AT+FDCC=<vr>, <br>, <wd>, <ln>, <df>, <ec>, <bf>, <st>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
MC55i AT Command Set
12.10 AT+FDFFC s
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12.10 AT+FDFFC Data Compression Format Conversion
This command determines the ME response to a mismatch between the data format negotiated for the fax ses-
sion, reported by the <df> subparameter, and the Phase C data desired by the controlling application, indicated
by the optional AT+FDT <df> subparameter, or the AT+FDIS <df> subparameter for AT+FDR operation.
Syntax
Parameter Description
[0] Mismatch checking is always disabled. The controlling application has to check
the <df> subparameter and transfer matching data.
Notes
• For further information see AT+FDIS.
• Used for Fax Class 2 only.
Test Command
AT+FDFFC=?
Response(s)
(list of <df>s)
OK
Read Command
AT+FDFFC?
Response(s)
<df>
OK
Write Command
AT+FDFFC=<df>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<df>(num)
MC55i AT Command Set
12.11 AT+FDIS s
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12.11 AT+FDIS Query or set session parameters
This command allows the controlling application to sense and constrain the capabilities used for the current ses-
sion. It uses AT+FDIS to generate DIS or DTC messages directly, and uses AT+FDIS and received DIS mes-
sages to generate DCS messages.
Syntax
Note
• Used for Fax Class 2 only.
Test Command
AT+FDIS=?
Response(s)
(list of <vr>s), (list of <br>s), (list of <wd>s), (list of <ln>s), (list of <df>s), (list of <ec>s), (list of <bf>s),
(list of <st>s)
OK
Read Command
AT+FDIS?
Response(s)
<vr>, <br>, <wd>, <ln>, <df>, <ec>, <bf>, <st>
OK
Write Command
AT+FDIS=<vr>, <br>, <wd>, <ln>, <df>, <ec>, <bf>, <st>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
MC55i AT Command Set
12.12 AT+FDR s
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12.12 AT+FDR Begin or continue phase C Data Reception
The command initiates transition to Phase C data reception.
Syntax
Note
• Used for Fax Class 2 only.
Exec Command
AT+FDR
Response(s)
CONNECT
or
OK
If error related to ME functionality
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
MC55i AT Command Set
12.13 AT+FDT s
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12.13 AT+FDT Data Transmission
This command requests the ME to transmit a Phase C page. When the ME is ready to acceptPhase C data, it
issues the negotiation responses and the CONNECT result code to the application.
In Phase B, the AT+FDT command releases the ME to proceed with negotiation, and releases the DCS message
to the remote station. In Phase C, the AT+FDT command resumes transmission after the end of a data stream
transmitted before.
Syntax
Note
• Used for Fax Class 2 only.
Exec Command
AT+FDT
Response(s)
CONNECT
Write Command
AT+FDT=<df>, <vr>, <wd>, <ln>
Response(s)
CONNECT
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
MC55i AT Command Set
12.14 AT+FET s
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12.14 AT+FET End a page or document
This command indicates that the current page or partial page is complete. An ERROR response code results if
this command is issued while the mode is on-hook.
Syntax
Parameter Description
Post Page Message Codes
1 Another document next
2 No more pages or documents
4 Another page, procedure interrupt
5 Another document, procedure interrupt
Note
• Used for Fax Class 2 only.
Write Command
AT+FET=<ppm>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<ppm>(num)
MC55i AT Command Set
12.15 AT+FK s
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12.15 AT+FK Kill operation, orderly FAX abort
ThiscommandcausestheTAtoterminatethesessioninanorderlymanner.
Syntax
Note
• Used for Fax Class 2 only
Exec Command
AT+FK
Response(s)
OK
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + - + - - - - -
MC55i AT Command Set
12.16 AT+FLID s
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12.16 AT+FLID Query or set the Local Id setting capabilities
Syntax
Parameter Description
Local ID string
Max. length and possible content as reported by test command. Default value is empty string ("").
Notes
• Used for Fax Class 2 only.
• See also AT+FCIG.
Test Command
AT+FLID=?
Response(s)
(max. character length of Local ID string) (range of supported ASCII character values)
OK
Read Command
AT+FLID?
Response(s)
<lid>
OK
Write Command
AT+FLID=<lid>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<lid>(num)
MC55i AT Command Set
12.17 AT+FMDL s
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12.17 AT+FMDL Identify Product Model
This command sends the model identification to the TA.
Syntax
Note
• Used for Fax Class 2 only.
Read Command
AT+FMDL?
Response(s)
Gipsy Soft Protocolstack
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + - + - - - - -
MC55i AT Command Set
12.18 AT+FMFR s
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12.18 AT+FMFR Request Manufacturer Identification
This command sends the manufacturer identification to the TA.
Syntax
Note
• Used for Fax Class 2 only
Read Command
AT+FMFR?
Response(s)
SIEMENS
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + - + - - - - -
MC55i AT Command Set
12.19 AT+FOPT s
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12.19 AT+FOPT Set bit Order independently
Model specific command to set bit order independently of the understanding which is "mirrored" and which is
direct.
Syntax
Parameter Description
0 Non-standard
1 Standard
Note
• Used for Fax Class 2 only.
Write Command
AT+FOPT=<opt>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + - + - - - - -
<opt>(num)
MC55i AT Command Set
12.20 AT+FPHCTO s
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12.20 AT+FPHCTO DTE Phase C Response Timeout
The timeout value <tout> determines how long the DCE will wait for a command after reaching the end of data
when transmitting in Phase C. When timeout is reached, the DCE assumes that there are no more pages or doc-
uments to send.
Syntax
Parameter Description
Timeout
Value in 100ms units
0...30(P)...255
Note
• Used for Fax Class 2 only.
Read Command
AT+FPHCTO?
Response(s)
<tout>
OK
Write Command
AT+FPHCTO=<tout>
Response(s)
OK
If error is related to ME functionality
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<tout>(num)
MC55i AT Command Set
12.21 AT+FREV s
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12.21 AT+FREV Identify Product Revision
This comand sends the revision identification to the TA.
Syntax
Note
• Used for Fax Class 2 only.
Read Command
AT+FREV?
Response(s)
V2.550
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + - + - - - - -
MC55i AT Command Set
12.22 AT+FRH s
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12.22 AT+FRH Receive Data Using HDLC Framing
The AT+FRH command enables the TA to receive frames using the HDLC protocol and the modulation schemes
defined in Section 12.1, FAX parameters. An ERROR response code results if the command is issued while the
modem is on-hook. The test command can be used in off-hook mode to check the modulation schemes sup-
ported by MC55i.
Syntax
Note
• Used for Fax Class 1 only.
Test Command
AT+FRH=?
Response(s)
In off-hook mode only:
+FRH:(list of <mod>s)
OK
In on-hook mode:
ERROR
Write Command
AT+FRH=<mod>
Response(s)
CONNECT
If error is related to ME functionality
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
MC55i AT Command Set
12.23 AT+FRM s
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12.23 AT+FRM Receive Data
The AT+FRM command causes the TA to enter the receive mode, using one of the modulation schemes defined
in Section 12.1, FAX parameters.
An ERROR response code results if the write command is issued while the modem is on-hook. The test com-
mand can be used in on-hook or off-hook mode to check the modulation schemes supported by MC55i.
Syntax
Notes
• Used for Fax Class 1 only.
•<mod>= 3 is not possible.
Test Command
AT+FRM=?
Response(s)
(list of <mod>s)
OK
Write Command
AT+FRM=<mod>
Response(s)
CONNECT
If error is related to ME functionality:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
MC55i AT Command Set
12.24 AT+FRS s
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12.24 AT+FRS Receive Silence
<time>=n causes the TA to report an OK result code to the TE after the specified period of silence was detected
on the line.
The command is aborted if any character is received by the TE. The modem discards the aborting character and
issues an OK result code. An ERROR response code results if this command is issued while the mode is on-
hook.
Syntax
Parameter Description
Number of 10 millisecond intervals
0...255
Note
• Used for Fax Class 1 only
Write Command
AT+FRS=<time>
Response(s)
OK
If error is related to ME functionality:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
<time>(num)
MC55i AT Command Set
12.25 AT+FTH s
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12.25 AT+FTH Transmit Data Using HDLC Framing
The AT+FTH command causes the TA to transmit data using the HDLC protocol and the modulation schemes
defined in Section 12.1, FAX parameters. An ERROR response code results if the command is issued while the
modem is on-hook. The test command can be used in off-hook mode to check the modulation schemes sup-
ported by MC55i.
Syntax
Note
• Used for Fax Class 1 only
Test Command
AT+FTH=?
Response(s)
In off-hook mode only:
+FTH:(list of <mod>s)
OK
In on-hook mode:
ERROR
Write Command
AT+FTH=<mod>
Response(s)
CONNECT
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
MC55i AT Command Set
12.26 AT+FTM s
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12.26 AT+FTM Transmit Data
The AT+FTM command causes the TA to transmit data, using one of the modulation schemes defined in Section
12.1, FAX parameters.
An ERROR response code results if the write command is issued while the modem is on-hook. The test com-
mand can be used in on-hook or off-hook mode to check the modulation schemes supported by MC55i.
Syntax
Notes
• Used for Fax Class 1 only.
•<mod>= 3 is not possible
Test Command
AT+FTM=?
Response(s)
(list of <mod>s)
OK
Write Command
AT+FTM=<mod>
Response(s)
CONNECT
If error is related to ME functionality:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
MC55i AT Command Set
12.27 AT+FTS s
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12.27 AT+FTS Stop Transmission and Wait
This command causes the TA to terminate a transmission and wait for <time> 10 millisecond intervals before
sending the OK result code to the TE.
Syntax
Parameter Description
no. of 10 millisecond intervals
0...85
Note
• Used for Fax Class 1 only
Write Command
AT+FTS=<time>
Response(s)
OK
In on-hook mode:
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
TIA/EIA-578 - + - + - - - - -
<time>(num)
MC55i AT Command Set
12.28 AT+FVRFC s
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12.28 AT+FVRFC Vertical Resolution Format Conversion
This command determines the DCE response to a mismatch between the vertical resolution negotiated for the
facsimile session and the Phase C data desired by the DTE.
Syntax
Parameter Description
0 Disable mismatch checking.
[2] Enable mismatch checking, with resolution conversion of 1-D data in the DCE,
and an implied AT+FK command executed on 2-D mismatch detection.
Note
• Used for Fax Class 2 only.
Test Command
AT+FVRFC=?
Response(s)
(list of supported <vrfc>s)
OK
Read Command
AT+FVRFC?
Response(s)
<vrfc>
OK
Write Command
AT+FVRFC=<vrfc>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
EIA PN-2388 - + - + - - - - -
<vrfc>(num)
MC55i AT Command Set
13. Short Message Service (SMS) Commands s
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13. Short Message Service (SMS) Commands
The AT Commands described in this chapter allow an external application to use the Short Message Service with
the MC55i.
13.1 SMS parameters
Parameter Description
Format is same for <pdu> in case of SMS, but without GSM 24.11 SC address field and parameter shall be
bounded by double quote characters like a normal string type parameter
String type alphanumeric representation of <da> or <oa> corresponding to the entry found in phonebook; this
feature is not supported
Command Data
GSM 03.40 TP-Command-Data in text mode responses; ME/TA converts each 8-bit octet into two IRA character
long hexadecimal numbers (e.g. octet with integer value 42 is presented to TE as two characters 2A (IRA 50
and 65))
Command Type
GSM 03.40 TP-Command-Type in integer format
[0]...255
Destination Address
GSM 03.40 TP- Destination-Address Address-Value field in string format; BCD numbers (or GSM default alpha-
bet characters) are converted into characters; type of address given by <toda>
User Data
In case of SMS: GSM 03.40 TP-User-Data in text mode responses; format:
• If <dcs> indicates that GSM 03.38 default alphabet is used and <fo> indicates that GSM 03.40 TP-User-
Data-Header-Indication is not set: ME/TA converts GSM alphabet into current TE character set according to
rules covered in Annex A.
• If <dcs> indicates that 8-bit or UCS2 data coding scheme is used, or <fo> indicates that GSM 03.40 TP-
User-Data-Header-Indication is set: ME/TA converts each 8-bit octet into hexadecimal numbers con-taining
two IRA characters (e.g. octet with integer value 42 is presented to TE as two characters 2A (IRA 50 and 65).
In case of CBS: GSM 03.41 CBM Content of Message in text mode responses; format:
• If <dcs> indicates that GSM 03.38 default alphabet is used: ME/TA converts GSM alphabet into current TE
character set according to rules covered in Annex A.
• If <dcs> indicates that 8-bit or UCS2 data coding scheme is used: ME/TA converts each 8-bit octet into hexa-
decimal numbers containing two IRA characters.
<ackpdu>(num)
<alpha>(str)(+CSCS)
<cdata>(num)
<ct>(num)
<da>(num)(+CSCS)
<data>(num)(+CSCS)
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Discharge Time
GSM 03.40 TP-Discharge-Time in time-string format: "yy/MM/dd,hh:mm:ss+zz", where characters indicate year
(two last digits), month, day, hour, minutes, seconds and time zone. For example, 6th of May 1994, 22:10:00
GMT+2 hours equals "94/05/06,22:10:00+08"
Integer type; value in the range of location numbers supported by the associated memory
Message Length
Integer type value indicating in the text mode (AT+CMGF=1) the length of the message body <data> (or
<cdata>) in characters; or in PDU mode (AT+CMGF=0), the length of the actual TP data unit in octets (i.e. the
RP layer SMSC address octets are not counted in the length) In text mode, the maximum length of an SMS
depends on the used coding scheme: It is 160 characters if the 7 bit GSM coding scheme is used, and 140 char-
acters according to the 8 bit GSM coding scheme.
If the SMS message format is ''text mode'' (AT+CMGF=1) and the character set is set to ''UCS2'' with AT+CSCS
and the SMS is also coded as "UCS2" (see <dcs> of AT+CSMP), then the length is in octets instead of charac-
ters.
Memory to be used when listing, reading and deleting messages:
“SM“ SIM message storage
“ME“ Mobile Equipment message storage
“MT“(D) Sum of "SM" and "ME" storages
Memory to be used when writing and sending messages:
“SM“ SIM message storage
“ME“ Mobile Equipment message storage
“MT“(D) Sum of "SM" and "ME" storages
Received messages will be placed in this memory storage if routing to TE is not set. See command AT+CNMI
with parameter <mt>=2.
“SM“ SIM message storage
“MT“(D) Sum of "SM" and "ME" storages
Message Identifier
GSM 03.41 CBM Message Identifier in integer format
Message Number
GSM 03.40 TP-Message-Number in integer format
<dt>(num)
<index>(num)
<length>(num)
<mem1>(str)
<mem2>(str)
<mem3>(str)
<mid>(num)
<mn>(num)
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Message Reference
GSM 03.40 TP-Message-Reference in integer format
Originating Address
GSM 03.40 TP-Originating-Address Address-Value field in string format; BCD numbers (or GSM default alpha-
bet characters) are converted into characters; type of address given by <tooa>
Page Parameter
GSM 03.41 CBM Page Parameter bits 4-7 in integer format
Page Parameter
GSM 03.41 CBM Page Parameter bits 0-3 in integer format
In the case of SMS: GSM 04.11 SC address followed by GSM 03.40 TPDU in hexadecimal format: ME/TA con-
verts each octet of TP data unit into hexadecimal numbers containing two IRA characters (e.g. octet with integer
value 42 is presented to TE as two characters 2A (IRA 50 and 65)). In the case of CBS: <ra> GSM 03.40 TP-
Recipient-Address Ad-dress-Value field in string format; BCD numbers (or GSM default alphabet characters)
are converted into characters; type of address given by <tora>
Recipient Address
GSM 03.40 TP-Recipient-Address Address-Value field in string format; BCD numbers (or GSM default alphabet
characters) are converted to characters of the currently selected TE character set (refer to command
AT+CSCS.); type of address given by <tora>
Service Center Address
GSM 04.11 RP SC address Address-Value field in string format; BCD numbers (or GSM default alphabet char-
acters) are converted to characters of the currently selected TE character set (refer to command AT+CSCS); type
of address given by <tosca>
Service Centre Time Stamp
GSM 03.40 TP-Service-Centre-Time-Stamp in time-string format (refer <dt>)
Serial Number
GSM 03.41 CBM Serial Number in integer format
<mr>(num)
<oa>(num)(+CSCS)
<page>(num)
<pages>(num)
<pdu>(num)
<ra>(num)(+CSCS)
<sca>(num)(+CSCS)
<scts>(num)
<sn>(num)
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Status
GSM 03.40 TP-Status in integer format
0...255
Message status
3GPP 27.005 Interface of SMS and CB. Indicates the status of message in memory.
Type of Destination Address
GSM 04.11 TP-Destination-Address Type-of-Address octet in integer format (when first character of <da> is +
(IRA 43) default is 145, otherwise default is 129)
0...255
Type of Originating Address
GSM 04.11 TP-Originating-Address Type-of-Address octet in integer format (default refer <toda>)
Type of Recipient Address
GSM 04.11 TP-Recipient-Address Type-of-Address octet in integer format (default refer <toda>)
Type of Service Center Address
GSM 04.11 RP SC address Type-of-Address octet in integer format (default refer <toda>)
<st>(num)
<stat>(str)
Description text mode (<mode>=1) PDU mode (<mode>=0) Default
Received unread mes-
sages
"REC UNREAD" 0 for SMS reading com-
mands
Received read messages "REC READ" 1
Stored unsent messages "STO UNSENT" 2 for SMS writing com-
mands
Stored sent messages "STO SENT" 3
All messages "ALL" 4
<toda>(num)
<tooa>(num)
<tora>(num)
<tosca>(num)
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13.2 AT+CMGC Send an SMS command
Syntax
Notes
• After invoking the commands AT+CMGW, AT+CMGS or AT+CMGC it is necessary to wait for the prompt ">"
before entering text or PDU. After the prompt a timer will be started to observe the input.
• At baudrates below 19200 it is recommended to use the line termination character only (refer to ATS3, default
<CR>) before entering the text or PDU. Use of the line termination character followed by the response format-
ting character (refer to ATS4, default <LF> can cause problems
Test Command
AT+CMGC=?
Response(s)
OK
Write Command
If text mode (see AT+CMGF=1)
AT+CMGC=<fo>, <ct>[, <pid>[, <mn>[, <da>[, <toda>]]]]<CR> Text can be entered <CTRL-Z>/<ESC>
Response(s)
+CMGC: <mr>[, <scts>]
If sending fails
ERROR
+CMS ERROR
Write Command
If PDU mode (see AT+CMGF=0)
AT+CMGC=<length><CR> PDU can be entered <CTRL-Z>/<ESC>
Response(s)
+CMGC: <mr>[, <ackpdu>]
OK
If sending fails
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
MC55i AT Command Set
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13.3 AT+CMGD Delete short message
The write command deletes a short message from the preferred message storage <mem1> location <index>.
Syntax
Notes
• If there is no short message stored at the selected index, the response is OK too.
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT+CMGD=?
Response(s)
OK
Write Command
AT+CMGD=<index>
Response(s)
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
MC55i AT Command Set
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13.4 AT+CMGF Select SMS message format
Syntax
Command Description
The write command specifies the input and output format of the short messages.
Parameter Description
[0](&F) PDU mode
1 Text mode
Test Command
AT+CMGF=?
Response(s)
+CMGF: (list of supported<mode>s)
OK
Read Command
AT+CMGF?
Response(s)
+CMGF: <mode>
OK
Write Command
AT+CMGF=<mode>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 - + + + + + - - -
<mode>(num)(&W)(&V)
MC55i AT Command Set
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13.5 AT+CMGL List SMS messages from preferred store
The write command returns messages with status value <stat> from message storage <mem1> to the TE. If the
status of the message is 'received unread', the status in the storage changes to 'received read'.
The execute command is the same as the write command with the given default for <stat>.
Syntax
Test Command
AT+CMGL=?
Response(s)
+CMGL: (list of supported <stat>s)
OK
Exec Command
AT+CMGL
Response(s)
+CMGL: (see write command for default of <stat>)
OK
Write Command
AT+CMGL=<stat>
Response(s)
Output if text mode (AT+CMGF=1) and command successful:
For SMS- SUBMITs and/or SMS-DELIVERs
+CMGL: <index>, <stat>, <oa>/<da>, [<alpha>], [<scts>][, <tooa>/<toda>, <length>]
<data>
[... ]
OK
For SMS-STATUS-REPORTs
+CMGL: <index>, <stat>, <fo>, <mr>, [<ra>], [<tora>], <scts>, <dt>, <st>
[... ]
OK
For SMS-Commands
+CMGL: <index>, <stat>, <fo>, <ct>
[... ]
OK
Output if PDU mode AT+CMGF=0 and command successful:
For SMS-SUBMITs and/or SMS-DELIVERs
+CMGL: <index>, <stat>, [<alpha>], <length>
<pdu>
[... ]
OK
If error is related to ME functionality
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
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Notes
• The selected <mem1> can contain different types of SMs (e.g. SMS-DELIVERs, SMS-SUBMITs, SMS-STA-
TUS-REPORTs and SMS-COMMANDs), the response may be a mix of the responses of different SM types.
TE application can recognize the response format by examining the third response parameter.
• The parameters <ra> and <tora> will only be displayed if parameter <ra> of the AT^SSCONF command is
set to 1.
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
MC55i AT Command Set
13.6 AT+CMGR s
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13.6 AT+CMGR Read SMS messages
The write command returns SMS message with location value <index> from message storage <mem1> to the
TE. If status of the message is 'received unread', status in the storage changes to 'received read'.
Syntax
Test Command
AT+CMGR=?
Response(s)
OK
Write Command
AT+CMGR=<index>
Response(s)
Output if text mode (AT+CMGF=1) and command successful:
For SMS-DELIVER
+CMGR: <stat>, <oa>, [<alpha>], <scts>[, <tooa>, <fo>, <pid>, <dcs>, <sca>, <tosca>,
<length>]
<data>
[... ]
OK
For SMS-SUBMIT
+CMGR: <stat>, <da>, [<alpha>][, <toda>, <fo>, <pid>, <dcs>, [<vp>], <sca>, <tosca>, <length>]
<data>
[... ]
OK
For SMS-STATUS-REPORT
+CMGR: <stat>, <fo>, <mr>, [<ra>], [<tora>], <scts>, <dt>, <st>
<data>
[... ]
OK
For SMS-Commands
+CMGR: <stat>, <fo>, <ct>[, <pid>, [<mn>], [<da>], [<toda>], <length>]
<data>
[... ]
OK
Output if PDU mode (AT+CMGF=0) and command successful:
For SMS-SUBMITs and/or SMS-DELIVERs
+CMGR: <stat>, [<alpha>], <length>
<pdu>
[... ]
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
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Notes
• Response if AT+CMGR is used to read an empty record index: +CMGR: 0,,0
• Response if AT+CMGR is used to read a non-existent record index: +CMS ERROR: invalid memory index
• The parameters <ra> and <tora> will only be displayed if parameter <ra> of the AT^SSCONF command is
set to 1.
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
MC55i AT Command Set
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13.7 AT+CMGS Send Short Message
The write command transmits a short message from TE to network (SMS-SUBMIT).
After invoking the write command wait for the prompt ">" and then start to write the message. To send the mes-
sage simply enter <CTRL-Z>. After the prompt a timer will be started to observe the input.
To abort sending use <ESC>. Abortion is acknowledged with "OK", though the message will not be sent.
The message reference <mr> is returned to the TE on successful message delivery. The value can be used to
identify the message in a delivery status report provided as an unsolicited result code.
Syntax
Notes
• If sending fails, for example, if a message is too long, the result code depends on the current setting of the
AT^SM20 command:
If the AT^SM20 <CmgwMode> equals 1 (factory default) any failure to send a message is responded with "OK".
Users should be aware, that despite the "OK" response, the message will not be sent to the subscriber.
If the AT^SM20 <CmgwMode> equals 0 any failure to send a message is responded with "ERROR".
• If sending fails due to timeout, then
AT^SM20 <CmgwMode>=1 causes "+CMS ERROR: Unknown error" to be returned;
AT^SM20 <CmgwMode>=0 causes "+CMS ERROR: timer expired" to be returned.
• Note that some providers do not recognize an @ symbol used in a short message. A widely used alternative
is typing "*" as defined in GSM 03.40 (GPP TS 23.40).
• All characters entered behind the prompt ">" will be recognized as GSM characters. For example, "Back-
space" (ASCII character 8) does not delete a character, but will be inserted into the short message as an addi-
tional physical character. As a result, the character you wanted to delete still appears in the text, plus the GSM
code equivalent of the Backspace key.
Test Command
AT+CMGS=?
Response(s)
OK
Write Command
If text mode (see AT+CMGF=1)
AT+CMGS=<da>[, <toda>]<CR> Text can be entered. <CTRL-Z>/<ESC>
Response(s)
+CMGS: <mr>[, <scts>]
OK
If sending fails see notes below.
Write Command
If PDU mode (see AT+CMGF=0)
AT+CMGS=<length><CR> PDU can be entered. <CTRL-Z>/<ESC>
Response(s)
+CMGS: <mr>[, <ackpdu>]
OK
If sending fails see notes below.
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
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• Message Length in Text Mode
The maximum length of a short message depends on the used coding scheme: It is 160 characters if the 7
bit GSM coding scheme is used, and 140 characters according to the 8 bit GSM coding scheme.
In case UCS2 character set selected it is highly recommended to set Data Coding Scheme (<dcs> of
AT+CSMP) to 16-bit data, otherwise the length of sms user data is restricted to 88 octets. Even better for mes-
sages with UCS2 character set is the PDU Mode.
• At baudrates lower than 19200 it is recommended to use the line termination character only (refer to <n> of
ATS3, default <CR>) before entering text or PDU. Use of the line termination character followed by the
response formatting character (see <n> of ATS4, default <LF>) can cause problems.
• During a pending USSD user interaction the AT+CMGS write command returns "+CME ERROR: operation
temporary not allowed" to prevent blocking situations.
MC55i AT Command Set
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13.8 AT+CMGW Write Short Messages to Memory
The execute and write commands transmit a short message (either SMS-DELIVER or SMS-SUBMIT) from TE
to memory storage <mem2>. Memory location <index> of the stored message is returned. Message status will
be set to 'stored unsent' unless otherwise given in parameter <stat>.
After invoking the execute or write command wait for the prompt ">" and then start to write the message. To save
the message simply enter <CTRL-Z>. After the prompt a timer will be started to observe the input.
To abort writing use <ESC>. Abortion is acknowledged with "OK", though the message will not be saved.
Syntax
Notes
• If writing fails, for example, if a message is too long, the result code depends on the current setting of the
AT^SM20 command:
If the AT^SM20 <CmgwMode>=1 (factory default) any failure to send a message is responded with "OK". Users
should be aware, that despite the "OK" response, the message will not be written to the selected SMS stor-
age.
If the AT^SM20 <CmgwMode> equals 0 any failure to write a message is responded with "ERROR".
Test Command
AT+CMGW=?
Response(s)
OK
Exec Command
If text mode (see AT+CMGF=1):
AT+CMGW
Response(s)
<CR> Text can be entered. <CTRL-Z>/<ESC>
+CMGW: <index>
OK
If writing fails
ERROR
+CMS ERROR
Write Command
If text mode (see AT+CMGF=1):
AT+CMGW=<oa>/<da>[, [<tooa>/<toda>][, <stat>]]<CR> Text can be entered. <CTRL-Z>/<ESC>
Response(s)
+CMGW: <index>
OK
If writing fails see notes below.
Write Command
If PDU mode (see AT+CMGF=0):
AT+CMGW=<length>[, <stat>]<CR> PDU can be entered. <CTRL-Z>/<ESC>
Response(s)
+CMGW: <index>
OK
If writing fails see notes below.
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
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• If writing fails due to timeout, then
AT^SM20 <CmgwMode>=1 causes "+CMS ERROR: Unknown error" to be returned;
AT^SM20 <CmgwMode>=0 causes "+CMS ERROR: timer expired" to be returned.
• Note that some providers do not recognize an @ symbol used in a short message. A widely used alternative
is typing "*" as defined in GSM 03.40 (GPP TS 23.40).
• For baudrates lower than 19200 it is recommended to use the line termination character only (refer to ATS3=
<n>, default <CR>) before entering the text or PDU. Use of the line termination character followed by the
response formating character (see ATS4= <n>, default <LF>) may cause problems.
• SMS-COMMANDs and SMS-STATUS-REPORTs cannot be stored in text mode.
• All characters entered behind the ">" prompt will be recognized as GSM characters. For example, "Back-
space" (ASCII character 8) does not delete a character, but will be inserted into the short message as an addi-
tional physical character. As a result, the character you wanted to delete still appears in the text, plus the GSM
code equivalent of the Backspace key.
• Message Length in Text Mode
The maximum length of a short message depends on the used coding scheme: It is 160 characters if the 7
bit GSM coding scheme is used, and 140 characters according to the 8 bit GSM coding scheme.
In case UCS2 character set selected it is highly recommended to set Data Coding Scheme (<dcs> of
AT+CSMP) to 16-bit data, otherwise the length of sms user data is restricted to 88 octets. Even better for mes-
sages with UCS2 character set is the PDU Mode.
• The length of 8-bit data coded short messages has to be greater than 0.
MC55i AT Command Set
13.9 AT+CMSS s
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13.9 AT+CMSS Send short messages from storage
The write command sends message with location value <index> from message storage <mem2> to the network
(SMS-SUBMIT or SMS-COMMAND). If new recipient address <da> is given for SMS-SUBMIT, it shall be used
instead of the one stored with the message. Reference value <mr> is returned to the TE on successful message
delivery. Value can be used to identify message upon unsolicited delivery status report result code.
If the optional parameter <da> is given, the old status of the short message at <index> remains unchanged
(see <stat>).
Syntax
Test Command
AT+CMSS=?
Response(s)
OK
Write Command
If text mode (AT+CMGF=1):
AT+CMSS=<index>[, <da>[, <toda>]]
Response(s)
+CMSS: <mr>[, <scts>]
OK
If sending fails
ERROR
+CMS ERROR
Write Command
If PDU mode (AT+CMGF=0):
AT+CMSS=<index>[, <da>[, <toda>]]
Response(s)
+CMSS: <mr>[, <ackpdu>]
OK
If sending fails
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
MC55i AT Command Set
13.10 AT+CNMA s
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13.10 AT+CNMA New Message Acknowledgement to ME/TE, only
phase 2+
The write / execute command confirms successful receipt of a new message (SMS-DELIVER or SMS-STATUS-
REPORT) routed directly to the TE. TA shall not send another +CMT or +CDS result code to TE until previous
one is acknowledged. If ME does not receive acknowledgement within required time (network time-out), ME
sends RP-ERROR to the network. TA shall automatically disable routing to TE by setting both <mt> and <ds>
values of AT+CNMI to zero.
Syntax
Parameter Description
Parameter required only for PDU mode.
0 Command operates similarly as in text mode.
Notes
• The execute / write command shall only be used when AT+CSMS parameter <service> equals 1 (= phase
2+).
• The execute command can be used no matter whether text mode or PDU mode is activated. The write com-
mand is designed for the PDU mode only.
• If multiplex mode is activated (AT+CMUX=0) the AT+CNMI parameter will be set to zero on all channels, if one
channel fails to acknowledge an incoming message within the required time.
Test Command
AT+CNMA=?
Response(s)
+CNMA: (list of supported <n>s)
OK
Exec Command
AT+CNMA
Response(s)
OK
ERROR
+CMS ERROR
Write Command
AT+CNMA=<n>
Response(s)
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<n>(num)
MC55i AT Command Set
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13.11 AT+CNMI New short Message Indication
The write command selects the procedure how the receipt of new short messages from the network is indicated
to the TE when TE is active, e.g. DTR signal is ON. If TE is inactive (e.g. DTR signal is OFF), message receiving
should be done as specified in GSM 03.38. If the DTR signal is not available or the state of the signal is ignored
(V.250 command AT&D0, reliable message transfer can be assured by using AT+CNMA acknowledgment proce-
dure. The rules <mt>=2 and <mt>=3 for storing received messages are possible only if phase 2+ compatibility
is activated with AT+CSMS=1. The parameter <ds>=1 is only available in phase 2+
Syntax
Unsolicited Result Codes
URC 1
<mt>=1:
+CMTI: <mem3>, <index>
Indicates that new message has been received
URC 2
<mt>=2 (PDU mode enabled):
+CMT: <length><CR><LF><pdu>
Indicates that new message has been received
URC 3
<mt>=2 (text mode enabled):
+CMT: <oa>, <scts>[, <tooa>, <fo>, <pid>, <dcs>, <sca>, <tosca>,
<length>]<CR><LF><data>
Indicates that new message has been received
Test Command
AT+CNMI=?
Response(s)
+CNMI: (list of supported<mode>s), (list of supported <mt>s), (list of supported <bm>s), (list of supported
<ds>s), (list of supported <bfr>s)
OK
Read Command
AT+CNMI?
Response(s)
+CNMI: <mode>, <mt>, <bm>, <ds>, <bfr>
OK
Write Command
AT+CNMI=[<mode>][, <mt>][, <bm>][, <ds>][, <bfr>]
Response(s)
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
MC55i AT Command Set
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URC 4
<bm>=2 (PDU mode enabled):
+CBM: <length><CR><LF><pdu>
Indicates that new cell broadcast message has been received
URC 5
<bm>=2 (text mode enabled):
+CBM: <sn>, <mid>, <dcs>, <page>, <pages><CR><LF><data>
Indicates that new cell broadcast message has been received
URC 6
<ds>=1 (PDU mode enabled):
+CDS: <length><CR><LF><pdu>
Indicates that new SMS status report has been received
URC 7
<ds>=1 (text mode enabled):
+CDS: <fo>, <mr>[, <ra>][, <tora>], <scts>, <dt>, <st>
Indicates that new SMS status report has been received
URC 8
<ds>=2:
+CDSI: <mem3>, <index>
Indicates that new SMS status report has been received
Parameter Description
[0](&F) Buffer unsolicited result codes in the TA. If TA result code buffer is full, indica-
tions can be buffered in some other place or the oldest indications may be dis-
carded and replaced with the new received indications.
1 Discard indication and reject new received message unsolicited result codes
when TA-TE link is reserved (e.g. in on-line data mode). Otherwise forward
them directly to the TE.
2 Buffer unsolicited result codes in the TA when TA-TE link is reserved (e.g. in
online data mode) and flush them to the TE after reservation. Otherwise for-
ward them directly to the TE.
3 Forward unsolicited result codes directly to the TE. When TA-TE link is
reserved (e.g. in online data mode) the URCs are signaled according to the
AT^SCFG parameters <uri>, <udri> and <urat>
Rules for storing received short messages depend on the relevant data coding method (refer to GSM 03.38),
preferred memory storage (AT+CPMS) setting and this value.
Note: If AT command interface is acting as the only display device, the ME must support storage of class 0 mes-
sages and messages in the message waiting indication group (discard message)
[0](&F) No SMS-DELIVER indications are routed to the TE.
1 If SMS-DELIVER is stored in ME/TA, indication of the memory location is
routed to the TE using unsolicited result code:
<mode>(num)(&W)
<mt>(num)(&W)(&V)
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2 SMS-DELIVERs, except class 2 messages and messages in the message
waiting indication group (store message) are routed directly to the TE using
unsolicited result code:
3 Class 3 SMS-DELIVERs are routed directly to the TE using unsolicited result
codes defined in <mt>=2. Messages of other data coding schemes result in
indication as defined in <mt>=1.
Rules for storing received CBMs depend on the relevant data coding method (refer to GSM 03.38), the setting
of Select CBM Types (AT+CSCB) and this value:
[0](&F) No CBM indications are routed to the TE.
2 New CBMs are routed directly to the TE using unsolicited result code:
3 Class 3 CBMs are routed directly to TE using unsolicited result codes defined
in <bm>=2.
[0](&F) No SMS-STATUS-REPORTs are routed to the TE.
1 SMS-STATUS-REPORTs are routed to the TE using unsolicited result code:
2 If SMS-STATUS-REPORT is routed into ME/TA, indication of the memory
location is routed to the TE using unsolicited result code:
[1](&F) TA buffer of unsolicited result codes defined within this command is cleared
when <mode> changes from 0 to 1...3.
Integer type; value in the range of location numbers supported by the associated memory
Notes
• Parameters <mt>=2,3 and <ds>=1 are only available with GSM phase 2+ (see AT+CSMS=1). Incoming SMs
or Status Reports have to be acknowledged with AT+CNMA=0 when using these phase 2+ parameters.
• Requirements specific to Multiplex mode:
In multiplex mode (AT+CMUX=0) only one channel can use a phase 2+ parameter. The parameter for <mt>
and <ds> on the other channels have to be set to zero. If either a SM or a Status Report is not acknowledged,
all AT+CNMI parameter in all channels will be set to zero.
• If the ME operates on different instances (MUX channels 1, 2, 3 or ASC0/ASC1) avoid different settings for
routing and indicating short messages. For example, if messages shall be routed directly to one instance of
the TE (set with AT+CNMI, AT^SSDA), it is not possible to activate the presentation of URCs with AT+CMER
or AT+CNMI on another instance. Any attempt to activate settings that conflict with existing settings on
another interface, will result in CME ERROR, or accordingly CMS ERROR.
• Handling of Class 0 short messages:
If the host application is provided with a display and AT^SSDA=1 has been set Class 0 short messages can
be displayed immediately.
If the host application does not include a display, ME handles Class 0 short messages as though there was
no message class, i.e. it will ignore bits 0 and 1 in the <dcs> and normal rules for exceeded memory capacity
shall apply. This approach is compliant with GSM 03.38 .
• The parameters <ra> and <tora> will only be displayed if <ra> of the AT^SSCONF command is set to 1.
• If either a SM or a Status Report is not acknowledged, all AT+CNMI parameter in all channels will be set to
zero.
<bm>(num)(&W)(&V)
<ds>(num)(&W)(&V)
<bfr>(num)(&V)
<index>(num)
MC55i AT Command Set
13.12 AT+CPMS s
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13.12 AT+CPMS Preferred SMS message storage
The write command selects memory storages <mem1>,<mem2>, <mem3> to be used for reading, writing, etc.
Syntax
Parameter Description
Number of messages currently in <mem1>
Number of messages currently in <mem2>
Number of messages currently in <mem3>
Number of messages storable in <mem1>
Number of messages storable in <mem2>
Number of messages storable in <mem3>
Test Command
AT+CPMS=?
Response(s)
+CPMS: (list of supported <mem1>s), (list of supported <mem2>s), (list of supported <mem3>s)
OK
Read Command
AT+CPMS?
Response(s)
+CPMS: <mem1>, <used1>, <total1>, <mem2>, <used2>, <total2>, <mem3>, <used3>, <total3>
OK
ERROR
+CMS ERROR
Write Command
AT+CPMS=<mem1>[, <mem2>[, <mem3>]]
Response(s)
+CPMS: <used1>, <total1>, <used2>, <total2>, <used3>, <total3>
OK
ERROR
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<used1>(num)
<used2>(num)
<used3>(num)
<total1>(num)
<total2>(num)
<total3>(num)
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Notes
• The Mobile Equipment storage ''ME'' offers space for 25 short messages, see <mem1>.
• ''MT'' is the sum of ''ME'' (= 25 locations) and ''SM'' (capacity varies with SIM card). The indices <index> of
the ''MT'' storage are dependent on the order selected with AT^SSMSS
•The <mem1>, <mem2> and <mem3> parameter will be stored in non-volatile memory.
• The user should be aware that the setting ''MT'' involves ''ME'' and ''SM'', with ''ME'' being filled up first. If the
''ME'' storage is full, MC55i will proceed with the ''SM'' storage.
Incoming Class 1 short messages (ME specific) will be preferably stored to ''ME'' and may be transferred to
the ''SM'' storage if ''ME'' is used up.
Incoming Class 2 messages (SIM specific) will be stored to the SIM card only, no matter whether or not there
is free ''ME'' space. As a result, the ^SMGO: 2 indication (see AT^SMGO) may be presented without prior indi-
cation of ^SMGO: 1. For more information regarding SIM and ME specific message classes refer to <dcs>
and the following specifications: GSM 03.38 and 3GPP TS23038.
• When <mem3> is switched over from ''MT'' to ''SM'' all free ''ME'' locations will be filled with dummy short mes-
sages. This procedure can take up to 35 seconds, until all the 25 records are written.
If switching from ''MT'' to ''SM'' was not finished due to error or user break, the value of <mem3> remains ''MT'',
but some of the dummy records remain in the ''ME'' storage. These records have to be deleted manually.
When <mem3> equals ''SM'', do not delete the dummy messages in the ''ME''. storage. They will be automat-
ically deleted when you switch back from ''SM'' to ''MT''. Again, this may take up to 35 seconds.
If switching from ''SM'' to ''MT'' was not finished due to an error or user break, the value of <mem3> remains
''SM'', but the ''ME'' storage will no longer be filled with dummy records. New incoming short messages may
now be written to the ''ME'' storage, if ''SM'' is already full. To avoid this, repeat the AT+CPMS command as
soon as possible to switch <mem3> back to ''MT''. As an alternative, you can manually delete the dummy
records and issue AT+CPMS=MT,MT,MT.
• Multiplexer: In Multiplex mode or when the two physical serial interfaces are connected, the parameter
<mem3> will be the same on all instances, but the settings of <mem1> and <mem2> may vary on each channel
/ interface. As a result, changes on parameter <mem1> and/or <mem2> befor activating the multiplexer or dif-
ferences values for other instanes can result in not desired behaviours like different outputs for AT+CMGL and
so on.
• While <mem3> equals ''SM'' and <mem1> equals ''ME'' it is possible that, after deleting short messages from
''ME'', the freed space on ''ME'' is reclaimed for new incoming short messages, when there is no space left on
the ''SM'' storage. As it is often the clients concern to have received short messages stored only to the SIM
card, inconsistent settings should be generally avoided. This can be achieved simply by using the same
parameter for all memory indices.
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
• The indices <index> of the storage are dependent on the order selected with AT^SSMSS.
MC55i AT Command Set
13.13 AT+CSCA s
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13.13 AT+CSCA SMS Service Center Address
Write command updates the SMSC address, through which mobile originated SMs are transmitted. In text mode,
setting is used by send and write commands. In PDU mode, setting is used by the same commands, but only
when the length of the SMSC address coded into the <pdu> parameter equals zero.
Syntax
Notes
• In case of using no parameter after AT+CSCA= the content of <sca> will be deleted.
• This command writes the service center address to non-volatile memo.
• The SMS service center address should be entered as specified by the service provider.
Test Command
AT+CSCA=?
Response(s)
OK
Read Command
AT+CSCA?
Response(s)
+CSCA: <sca>, <tosca>
OK
Write Command
AT+CSCA=<sca>[, <tosca>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
MC55i AT Command Set
13.14 AT+CSCB s
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13.14 AT+CSCB Select Cell Broadcast Message Indication
The test command returns the supported modes as a compound value.
The write command selects which types of CBMs are to be received by the ME.
Syntax
Parameter Description
Message mode
0(&F) Accept messages that are defined in <mids> and <dcss>
1 Forbid messages that are defined in <mids> and <dcss>
Cell Broadcast Message ID specification
[““](&F) default value of this parameter is empty string, and it means that no CBM iden-
tifiers are specified.
•For <mode>=0: Six different possible combinations of CBM IDs (e.g. "0,1,5,320-478,922,2000-3000").
In certain configurations, e.g. if using SIMs that contain data in Elementary File EF-CBMID (Cell Broadcast
Message Identifier for Data download) less than six combinations may be available.
To access a SIM's Elementary File data refer to command AT+CRSM.
•For <mode>=1: One CBM ID or range of IDs (e.g. "320-478").
CBM data coding scheme specification
[““](&F) default value of this parameter is empty string
All different possible combinations of CBM data coding schemes (e.g. "0-3,5"). Using default empty string leads
to get all CBMs independent of their dcss.
A given <dcss> replaces any former value and is used for consecutive requests.
Test Command
AT+CSCB=?
Response(s)
+CSCB: (list of supported <mode>s)
OK
Read Command
AT+CSCB?
Response(s)
+CSCB: <mode>, <mids>, <dcss>
OK
Write Command
AT+CSCB=<mode>[, <mids>[, <dcss>]]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<mode>(num)
<mids>(str)
<dcss>(str)
MC55i AT Command Set
13.15 AT+CSDH s
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13.15 AT+CSDH Show SMS text mode parameters
The write command sets whether or not detailed header information is shown in text mode result codes.
Syntax
Parameter Description
[0](&F) Do not show header values defined in commands AT+CSCA and AT+CSMP
(<sca>, <tosca>,<fo>,<vp>, <pid> and <dcs>) nor <length>, <toda> or
<tooa> in "+CMTI", AT+CMGL, AT+CMGR result codes for SMS-DELIVERs and
SMS-SUBMITs in text mode; for SMS-COMMANDs in +CMGR result code, do
not show <pid>,<mn>,<da>, <toda>, <length> or <cdata>
1 Show the values in result codes
Test Command
AT+CSDH=?
Response(s)
+CSDH: ((list of supported <show>s)
OK
Read Command
AT+CSDH?
Response(s)
+CSDH:<show>
OK
Write Command
AT+CSDH=<show>
Response(s)
+CSDH: <show>
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<show>(num)(&W)
MC55i AT Command Set
13.16 AT+CSMP s
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13.16 AT+CSMP Set SMS text Mode Parameters
The write command selects values for additional parameters needed when the short message is sent to the net-
work or placed in a storage when text format message mode is selected.
It is possible to set the validity period starting from the time when the short message is received by the SMSC
(<vp> is in range 0... 255) or define the absolute time of the validity period termination (<vp> is a string). The
format of <vp> is given by <fo>. If TA supports the enhanced validity period format, see GSM 03.40), it shall be
given as a hexadecimal coded string (e.g. <pdu>) with quotes.
Syntax
Parameter Description
First Octet
depending on the command or result code: first octet of GSM 03.40 SMS-DELIVER, SMS-SUBMIT (default 17),
SMS-STATUS-REPORT, or SMS-COMMAND (default 2) in integer format
0...17(&F)...255
Depending on SMS-SUBMIT <fo> setting: GSM 03.40 TP-Validity-Period either in integer format or in time-
string format (refer <dt>)
0...167(&F)...255
Data Coding Scheme
GSM 03.38 SMS Data Coding Scheme, or Cell Broadcast Data Coding Scheme in integer format
0(&F)...247
Test Command
AT+CSMP=?
Response(s)
OK
Read Command
AT+CSMP?
Response(s)
+CSMP:<fo>, <vp>/ <scts>, <pid>, <dcs>
OK
Write Command
AT+CSMP=<fo>[, <vp>/<scts>[, <pid>[, <dcs>]]]
Response(s)
+CSMP: <index>
OK
If sending fails
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<fo>(num)
<vp>(num)
<dcs>(num)
MC55i AT Command Set
13.16 AT+CSMP s
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Protocol Identifier
GSM 03.40 TP-Protocol-Identifier in integer format
0(&F)...255
Notes
• When storing a SMS DELIVER from the TE to the preferred memory storage in text mode (using the AT+CMGW
write command), <vp> field can be used for <scts>.
• The command writes the parameters to the non-volatile memory.
<pid>(num)
MC55i AT Command Set
13.17 AT+CSMS s
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13.17 AT+CSMS Select Message Service
Syntax
Parameter Description
0(&F) GSM 03.40 and GSM 03.41 (the syntax of SMS AT commands is compatible
with GSM 07.05 Phase 2 version 4.7.0; Phase 2+ features which do not require
new command syntax may be supported, e.g. correct routing of messages with
new Phase 2+ data coding schemes)
1 GSM 03.40 and GSM 03.41 (the syntax of SMS AT commands is compatible
with GSM 07.05 Phase 2+ version; the requirement of <service> setting 1 is
mentioned under corresponding command descriptions).
Mobile Terminated Messages:
0 Type not supported
1 Type supported
Mobile Originated Messages:
0 Type not supported
1 Type supported
Test Command
AT+CSMS=?
Response(s)
+CSMS: (list of supported<service>s)
OK
Read Command
AT+CSMS?
Response(s)
+CSMS: <service>, <mt>, <mo>, <bm>
OK
Write Command
AT+CSMS=<service>
Response(s)
+CSMS: <mt>, <mo>, <bm>
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.05 + + + + + + - - -
<service>(num)(&W)(&V)
<mt>(num)
<mo>(num)
MC55i AT Command Set
13.17 AT+CSMS s
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Broadcast Type Messages:
0 Type not supported
1 Type supported
Notes
• If CSMS mode is switched from Phase 2+ to Phase 2 and one or more AT+CNMI Parameter are Phase 2+
specific a '+CMS ERROR: unknown error' will appear. It is recommended to switch the AT+CNMI Parameters
to Phase 2 specific values before entering Phase 2.
• Phase 2+ (<service>=1) must be set before the following features can be used:
- Configuring procedures for indicating received short messages with the AT+CNMI parameters <mt>=2 or
<mt>=3 and <ds>=1.
- Acknowledging incoming short messages with AT+CNMA.
- Receiving Status Reports and acknowledging them with AT+CNMA.
<bm>(num)
MC55i AT Command Set
13.18 AT^SLMS s
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13.18 AT^SLMS List SMS Memory Storage
AT^SLMS indicates the max. capacity of each SMS storage type and the number of locations currently used.
Syntax
Parameter Description
Maximum number of messages storable in the SMS memory of the SIM (physical storage "SM")
Maximum number of messages storable in the SMS memory of the Mobile Equipment (physical storage "ME")
Sum of "SM" and "ME", indicated as "MT". Maximum number of all messages storable in the SIM memory and
the Mobile Equipment memory.
Number of messages currently stored in the SMS memory of the SIM (physical storage "SM")
Number of messages currently stored in the SMS memory of the Mobile Equipment (physical storage "ME")
Concatenated logical SMS storages of SIM ("SM") and Mobile Equipment ("ME"). Sum of all messages currently
stored, indicated as "MT".
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SLMS=?
Response(s)
OK
Exec Command
AT^SLMS
Response(s)
^SLMS: ''MT'',<total3>, <used3>
^SLMS: ''SM'',<total1>, <used1>
^SLMS: ''ME'',<total2>, <used2>
OK
ERROR
+CMS ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<total1>(num)
<total2>(num)
<total3>(num)
<used1>(num)
<used2>(num)
<used3>(num)
MC55i AT Command Set
13.19 AT^SMGL s
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13.19 AT^SMGL List Short Messages from preferred store without set-
ting status to REC READ
The write command allows to select a status type and lists, from the message storage <mem1>, all messages
that currently have the specified <stat>. The major difference over the standard command AT+CMGL is that the
status of the listed messages remains u n c h a n g e d (unread remains unread).
The execute command is the same as the write command, but uses the given default of <stat>.
Syntax
Notes
• The selected <mem1> can contain different types of SMs (e.g. SMS-DELIVERs, SMS-SUBMITs, SMS-STA-
TUS-REPORTs and SMS-COMMANDs), the response may be a mix of the responses of different SM types.
TE application can recognize the response format by examining the third response parameter.
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SMGL=?
Response(s)
same as AT+CMGL
Exec Command
AT^SMGL
Response(s)
^SMGL: (For default values of <stat>, see "Section 13.1, SMS parameters.)
OK
Write Command
AT^SMGL=<stat>
Response(s)
same as AT+CMGL
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
MC55i AT Command Set
13.20 AT^SMGO s
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13.20 AT^SMGO Set or query SMS overflow presentation mode or
query SMS overflow
The write command sets the overflow presentation mode.
The read command returns the overflow presentation mode and the SMS overflow status.
Syntax
Unsolicited Result Code
SMS buffer change:
^SMGO: <mode>
Status of SMS buffer has changed.
Parameter Description
SMS overflow presentation mode
[0](&F) Disable
1 Enable
SMS overflow status
0 Space available
1 SMS buffer full (The buffer for received short messages is <mem3>. See
AT+CPMS.)
2 Buffer full and new message waiting in SC for delivery to phone
Test Command
AT^SMGO=?
Response(s)
^SMGO: (list of supported<n>s)
OK
Read Command
AT^SMGO?
Response(s)
^SMGO: <n>, <mode>
OK
ERROR
+CMS ERROR
Write Command
AT^SMGO=<n>
Response(s)
OK
ERROR
CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<n>(num)(&W)(&V)
<mode>(num)(&V)
MC55i AT Command Set
13.20 AT^SMGO s
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Notes
• Incoming short messages with message class 1 (ME specific short messages) or class 2 (SIM specific short
messages), see <dcs> in GSM 03.38, will be stored either in ''ME'' or in ''SM'' storage. Therefore the "^SMGO:
2" indication could occur, without issuing the indication "^SMGO: 1" before. The indication "^SMGO: 1" means
that both buffers (''ME'' and ''SM'') are full.
• For more information regarding SIM and ME specific message classes refer to <dcs> and the following spec-
ifications: GSM 03.38 and 3GPP TS 23.038 .
MC55i AT Command Set
13.21 AT^SMGR s
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13.21 AT^SMGR Read short message without setting status to REC
READ
The AT^SMGR command is a specific Siemens command which has the same syntax as AT+CMGR. The only func-
tional difference is that the status "REC UNREAD" of a short message is not overwritten to "REC READ".
Syntax
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SMGR=?
Response(s)
^SMGR:
OK
Write Command
AT^SMGR=<index>
Response(s)
see AT+CMGR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
MC55i AT Command Set
13.22 AT^SSCONF s
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13.22 AT^SSCONF SMS Command Configuration
AT^SSCONF controls details of some SMS releated commands. Please note that AT^SSCONF settings are stored
volatile, i.e. after restart or reset the default values will be restored.
Syntax
Parameter Description
Display recipient address
[0](&F) MC55i does not display <ra> and <tora>. These parameters are used with
the result codes of AT+CMGL, AT^SMGL, AT+CMGR, AT^SMGR and the URC
"+CDS".
1 MC55i displays <ra> and <tora>.
Test Command
AT^SSCONF=?
Response(s)
^SSCONF:list of supported <ra>s
OK
Read Command
AT^SSCONF?
Response(s)
^SSCONF:<ra>
OK
Write Command
AT^SSCONF=<ra>
Response(s)
OK
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
- + + + + + - - -
<ra>(num)
MC55i AT Command Set
13.23 AT^SSDA s
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13.23 AT^SSDA Set SMS Display Availability
This command allows to notify the MC55i of its controlling application's capability to immediately display incom-
ing SMS on a display.
If the application is able to display incoming short messages, a class 0 message shall be displayed immediately.
However, if it does not, class 0 messages shall be treated as if no message class is determined (GSM 03.38[17]).
The effect of this command if <da>=1 is to determine the behavior of parameter <mt> of AT+CNMI:
If <da>=1 and <mt>=1 incoming class 0 mesages need to be acknowledged with AT+CNMA (see also AT+CNMI
and AT+CSMS)
If multiplex mode is enabled (AT+CMUX) and <da>=1 with <mt>=1 is set on any logical channel, all other chan-
nels have to use <mt>=0.
Syntax
Parameter Description
Display Availability
0(&F) Application is not able to display incoming short message
1 Application is able to display incoming short message
Note
• If the ME operates on different instances (MUX channels 1, 2, 3 or ASC0/ASC1) avoid different settings for
routing and indicating short messages. For example, if messages shall be routed directly to one instance of
the TE (set with AT+CNMI, AT^SSDA), it is not possible to activate the presentation of URCs with AT+CMER
or AT+CNMI on another instance. Any attempt to activate settings that conflict with existing settings on
another interface, will result in CME ERROR, or accordingly CMS ERROR.
Test Command
AT^SSDA=?
Response(s)
^SSDA:list of supported <da>s
OK
Read Command
AT^SSDA?
Response(s)
^SSDA:<da>
OK
Write Command
AT^SSDA=<da>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<da>(num)
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13.24 AT^SSMSS Set Short Message Storage Sequence
The short message storage ''MT'' (see AT+CPMS) is a logical storage. It consists of two physical storages ''ME''
and ''SM''. This command allows to select the sequence of addressing this storage.
Syntax
Parameter Description
MT sequence
0(&F)(P) ''MT'' storage is ''ME'' then ''SM
1 ''MT'' storage is ''SM'' then ''ME''
Note
• Access to the SIM storage is faster. For compatibility with previous software re-leases, the ''MT'' sequence
<seq>=0 is the factory default.
Test Command
AT^SSMSS=?
Response(s)
^SSMSS: (list of supported) <seq>s
Read Command
AT^SSMSS?
Response(s)
^SSMSS: <seq>
OK
Write Command
AT^SSMSS=<seq>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<seq>(num)
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14. SIM related Commands
The AT commands described in this chapter are related to the Subscriber Identity Module (SIM) connected to
MC55i.
Note:
If using data from the SIM please bear in mind that the content of all Elementary Files is subject to change at any
moment!
This is because the network can change the SIM's data in the background via the SIM Application Toolkit (SAT)
procedure "Data download to SIM". For a detailed description please refer to GSM 11.14, [22].
To get informed that changing Elementary Files has taken place the TA needs to hook to the SAT Proactive Com-
mand "REFRESH". To achieve this, the AT command interface of SAT, i.e. Remote-SAT, needs to be activated.
An overview is given at Chapter 15., SIM Application Toolkit (SAT) Commands, additional information is available
with the document "Remote-SAT User Guide" [3].
14.1 AT+CRSM Restricted SIM Access
AT+CRSM offers easy access of the Elementary Files on the SIM. Access to the SIM database is restricted to the
commands which are listed at <command>. However, additional SIM commands are available via AT^SXSM.
All parameters of AT+CRSM are used as specified by GSM 11.11 [21]. MC55i handles internally all required SIM
interface locking and file selection routines.
As response to the command, the MC55i sends the actual SIM information parameters and response data. Error
result code "+CME ERROR" may be returned if the command cannot be passed to the SIM, e.g. if the SIM is not
inserted. However, failure in the execution of the command in the SIM is reported in <sw1> and <sw2> param-
eters.
Please beware of possible changes to Elementary Files by the network at any time, refer Chapter 14., SIM
related Commands.
Syntax
Parameter Description
SIM command number.
176 READ BINARY
Test Command
AT+CRSM=?
Response(s)
OK
Write Command
AT+CRSM=<command>[, <fileID>[, <P1>, <P2>, <P3>[, <data>]]]
Response(s)
+CRSM: <sw1>,<sw2>[,<response>]
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<command>(num)
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178 READ RECORD
192 GET RESPONSE
214 UPDATE BINARY
220 UPDATE RECORD
242 STATUS
Identifier for an elementary data file on SIM, if used by <command>.
Parameter to be passed on by the MC55i to the SIM.
0...255
Parameter to be passed on by the MC55i to the SIM.
0...255
Parameter to be passed on by the MC55i to the SIM.
0...255
Information which shall be written to the SIM (hexadecimal character format).
Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Response data in case of a successful completion of the previously issued command.
"STATUS" and "GET RESPONSE" commands return data, which gives information about the currently selected
elementary data field. This information includes the type of file and its size.
After "READ BINARY" or "READ RECORD" commands the requested data will be returned.
<response> is empty after "UPDATE BINARY" or "UPDATE RECORD" commands.
<fileID>(num)
<P1>(num)
<P2>(num)
<P3>(num)
<data>(str)
<sw1>(num)
<sw2>(num)
<response>(str)
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14.2 AT^SXSM Extended SIM Access
AT^SXSM extends AT+CRSM with additional SIM commands.
All parameters of AT^SXSM are used as specified by GSM 11.11 [21]. MC55i handles internally all required SIM
interface locking and file selection routines.
MC55i may return error result code "+CME ERROR" if the command cannot be passed to the SIM, e.g. if no SIM
is inserted. However, errors related to SIM action are reported in <sw1> and <sw2> parameters as defined in
GSM 11.11 [21].
Syntax
Parameter Description
136 RUN GSM ALGORITHM
Start the authentication mechanism and cipher key generation on the SIM. It
runs the algorithms A3 and A8 using a 16 byte random number and the sub-
scriber authentication key Ki, which is stored in the SIM.
Identifier for an elementary data file on SIM, if used by <command>.
Parameter to be passed on by the MC55i to the SIM.
Parameter to be passed on by the MC55i to the SIM.
Parameter to be passed on by the MC55i to the SIM.
If <command>=136 (RUN GSM ALGORITHM):
16 byte random number.
Test Command
AT^SXSM=?
Response(s)
OK
Write Command
AT^SXSM=<command>[, <fileID>[, <P1>, <P2>, <P3>[, <data>]]]
Response(s)
^SXSM: <sw1>, <sw2>[,<response>]
OK
ERROR
+CME ERROR: <err>
PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
+ + + + + + - - -
<command>(num)
<fileID>(num)
<P1>(num)
<P2>(num)
<P3>(num)
<data>(str)
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Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Status information from the SIM about the execution of the actual command. It is returned in both cases, on suc-
cessful or failed execution of the command.
0...255
Response in case of a successful completion of the previously issued SIM command.
If <command>=136 (RUN GSM ALGORITHM):
MC55i returns SRES and cipher key Kc as calculated by the SIM.
Example
Use <command>=136 (RUN GSM ALGORITHM) to obtain SRES and cipher key Kc values as calculated by the
SIM.
<sw1>(num)
<sw2>(num)
<response>(str)
Byte(s) Description Length
1 - 4 SRES - Signed RESponse 4
5 - 12 Kc - Cipher Key 8
at^sxsm=136,,0,0,16,"0011223
3445566778899AABBCCDDEEFF"
Start SIM command "RUN GSM ALGORITHM" with 16 byte random
number.
^SXSM:
144,0,00112233445566778899AA
BB
SRES (bytes 1-4) and Cypher Key Kc (bytes 5-12) values as returned
by the SIM.
OK
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14.3 AT^SCKS Query SIM and Chip Card Holder Status
This command controls the SIM connection presentation mode and queries the connection status of the SIM and
the card holder tray of the MC55i.
Syntax
Unsolicited Result Code
^SCKS: <SimStatus>
During startup, and if the MC55i's SIM connection status has changed an unsolicited result code (URC) is issued.
Command Description
The read command returns the URC presentation mode and the status of the SIM card connection.
The write command enables or disables the presentation of URCs to report whether or not the SIM card is con-
nected.
If the ME is powered down or reset (AT+CFUN or AT^SMSO) the current presentation mode setting <mode> will
not be retained. Therefore the setting <mode>=1 needs to be restored after power on the MC55i or may be saved
in the user profile (AT&W).
Parameter Description
0(&F) Suppress unsolicited result codes
1 Output unsolicited result codes
0 Card holder tray removed or SIM connection error
1 SIM inserted(refer to note)
Test Command
AT^SCKS=?
Response(s)
^SCKS:(list of supported <mode>s)
OK
Read Command
AT^SCKS?
Response(s)
^SCKS: <mode>, <SimStatus>
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SCKS=<mode>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<mode>(num)(&W)(&V)
<SimStatus>(num)(&V)
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Note
•<SimStatus> reflects the status of the SIM and the card holder tray. Therefore if an empty SIM card tray is
inserted, two URCs will be presented, indicating the status 1 followed by 0, i.e. a SIM is inserted into the card
holder tray but no SIM connection could be established.
Example
Now, after inserting an empty card tray the following URCs appear:
AT^SCKS=1
Activates the presentation of unsolicited result codes
OK
^SCKS: 1
Tray connected
^SCKS: 0
No SIM card found
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14.4 AT^SCID Display SIM card identification number
Syntax
Command Description
TA returns the card identification number in SIM (SIM file EFICCID, see GSM 11.11 Chap.10.1.1) as string type.
Parameter Description
card identification number of SIM card
Test Command
AT^SCID=?
Response(s)
OK
Exec Command
AT^SCID
Response(s)
^SCID: <cid>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<cid>(str)
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14.5 AT+CXXCID Display card ID
Syntax
Command Description
TA returns the card identification number in SIM (SIM file EF ICCID, see GSM 11.11 Chap.10.1.1) as string type.
Note
• See also: AT^SCID.
Test Command
AT+CXXCID=?
Response(s)
OK
Exec Command
AT+CXXCID
Response(s)
+CXXCID: <cid>
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
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15. SIM Application Toolkit (SAT) Commands
This chapter offers a brief reference to AT commands and responses related to the MC55i's SIM Application
Toolkit (SAT) implementation. A consistent and detailed description can be found in the "Remote-SAT User's
Guide" [3]. For further advice please contact the Wireless Modules Application Engineering Department at Sie-
mens AG.
ETSI specification GSM 11.14 [22] defines SAT in detail.
SIM Application Toolkit (SAT) is a technology that allows an application running on the SIM to control the Mobile
Equipment (ME). Remote-SAT (RSAT) provides a link between applications located on the SIM and a customer
application (TA). The purpose of RSAT is to allow the TA to send AT commands to the SAT interface and to dis-
play all SAT activities on the user interface of the customer application.
Two groups of commands are exchanged between the SAT located on the MC55i and the SIM Application run-
ning on the SIM:
• Proactive commands are sent from the SIM application to the MC55i's SAT, such as "DISPLAY TEXT".
• Envelope commands are sent from the MC55i's SAT to the SIM application, such as "MENU SELECTION".
15.1 AT^SSTA SAT Interface Activation
The AT^SSTA write command can be used to specify the Remote-SAT activation mode <mode> and, if Explicit
Response mode is enabled, to explicitly activate the Remote SAT interface. Removing and inserting the SIM
does not affect the activation status.
SAT commands which are not using the AT interface (non MMI related SAT commands, e.g. PROVIDE LOCAL
INFORMATION) are executed without activating Remote-SAT.
The read command can be used to request the current operating status and the used alphabet of the Remote-
SAT interface.
Syntax
Test Command
AT^SSTA=?
Response(s)
^SSTA:(list of supported <state>s), (list of supported <Alphabet>s)
OK
Read Command
AT^SSTA?
Response(s)
^SSTA: <state>, <Alphabet>, <allowedInstance>, <SatProfile>
OK
Write Command
AT^SSTA=<mode>[, <Alphabet>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
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Parameter Description
MC55i Remote-SAT interface states
0 RESET
1 OFF
2IDLE
3 PAC
4WAIT
Parameter is stored non-volatile and takes effect after next restart of the ME.
0(D) GSM character set
Input of a character requests one byte, e.g. "Y".
1 UCS2
To display the 16 bit value of characters represented in UCS2 alphabet a 4 byte
string is required, e.g. "0059" is coding the character "Y". For details please
refer to ISO/IEC 10646.
0 SAT is already used on another instance (logical channel in case of the multi-
plex protocol). Only test and read commands can be used.
1 SAT may be started on this instance via the write version of this command.
SAT profile according to GSM 11.14 [22]
The profile tells the SIM Application which features (e.g. proactive commands) are supported by the SIM Appli-
cation Toolkit implementation of the MC55i.
Select Remote SAT activation mode.
Parameter is stored non-volatile and takes effect after next restart of the ME. Removing and inserting the SIM
does not affect the activation status.
0(D) Automatic response (AR) mode.
All commands and responses are exchanged automatically between the ME
and the SIM application. This eliminates the need to enter any Remote SAT AT
commands incl. the AT^SSTA command.
If AR mode is enabled the ME enters the OFF state (<state>=1) after reboot.
1 Explicit response (ER) mode.
This mode is intended for use with an MMI. If ER mode is enabled the MMI is
required to handle, via the module's Remote-SAT interface, all commands and
responses transmitted to or from the SIM.
If ER mode is enabled the ME enters the IDLE state (<state>= 2) after reboot.
<state>(num)
<Alphabet>(num)
<allowedInstance>(num)
<SatProfile>(str)
<mode>(num)
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15.2 ^SSTN SAT Notification
Unsolicited Result Codes
URC 1
Proactive Command notification
^SSTN: <cmdType>
Every time the SIM Application issues a Proactive Command, via the ME, the TA will receive a notification.
This indicates the type of Proactive Command issued.
AT^SSTGI must then be used by the TA to request the parameters of the Proactive Command from the ME.
Upon receiving the ^SSTGI response from the ME, the TA must send AT^SSTR to confirm the execution of
the Proactive Command and provide any required user response, e.g. a selected menu item.
URC 2
Terminate Proactive Command notification
^SSTN: <cmdTerminateValue>
When the SIM application has issued a Proactive Command to the ME, it is possible that this command will
be terminated later. URC "^SSTN" is sent with a different Proactive Command type number (added terminate
offset 100) to indicate the termination of the specified command.
The state changes to idle. Therefore the TA should avoid sending any further commands related to the ter-
minated Proactive Command, e.g. AT^SSTGI or AT^SSTR.
URC 3
Notification that SIM Application has returned to main menu
^SSTN: 254
Notification to the TA when the SIM Application has finished a command cycle and again enters its main
menue, which was transferred with an URC "^SSTN: 37" (SET UP MENU) at start up.
This URC should be used to open this menue on the sreen.
The TA does not need to respond directly, i.e. AT^SSTR is not required.
URC 4
SIM reset notification
^SSTN: 255
Notification to the TA if a Proactive Command "REFRESH - SIM Reset" has been issued by the SIM Applica-
tion, please refer to AT^SSTGI.
This URC should be used to set the TAs application to its initial state since the SIM Application will start from
the beginning, too.
The TA does not need to respond directly, i.e. related AT^SSTGI and AT^SSTR are neither required nor
allowed.
Since the ME is still busy on SIM access the ME may respond with "+CME ERROR: SIM blocked" or "+CME
ERROR: SIM busy" on following PIN required AT Commands for a while. Then TA shall retry until the ME
responds with "OK". The time needed for this process depends on the SIM and may take more than 10 sec-
onds.
Parameter Description
Proactive Command number
Defined as <cmdType> + terminate offset. The terminate offset equals 100.
<cmdType>(num)
<cmdTerminateValue>(num)
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15.3 AT^SSTGI SAT Get Information
Regularly this command is used upon receipt of an URC "^SSTN" to request the parameters of the Proactive
Command.
Then the TA is expected to acknowledge the AT^SSTGI response with AT^SSTR to confirm that the Proactive
Command has been executed. AT^SSTR will also provide any user information, e.g. a selected menu item.
The Proactive Command type value specifies to which "^SSTN" the command is related.
Syntax
Parameter Description
MC55i Remote-SAT interface states
0 RESET
1 OFF
2IDLE
3 PAC
4WAIT
Related Proactive Command
Test Command
AT^SSTGI=?
Response(s)
^SSTGI:(list of supported <state>s), (list of supported <cmdType>s)
OK
Read Command
AT^SSTGI?
Response(s)
^SSTGI: <state>, <cmdType>
OK
Write Command
AT^SSTGI=<cmdType>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<state>(num)
<cmdType>(num)
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15.4 AT^SSTR SAT Response
The TA is expected to acknowledge the AT^SSTGI response with AT^SSTR to confirm that the Proactive Com-
mand has been executed. AT^SSTR will also provide any user information, e.g. a selected menu item.
Syntax
Parameter Description
MC55i Remote-SAT interface states
0 RESET
1 OFF
2IDLE
3 PAC
4WAIT
Number related to Proactive Command or event type according to GSM 11.14 [22].
Command status return regarding the type of action that has taken place, e.g. action performed by the user.
Values are in accordance with GSM 11.14 [22].
Response number entered by user
Response string entered by user
Test Command
AT^SSTR=?
Response(s)
^SSTR:(list of supported <state>s), (list of supported <cmdType>s)
OK
Read Command
AT^SSTR?
Response(s)
^SSTR: <state>, <cmdType>
OK
Write Command
AT^SSTR=<cmdType>, <status>[, <inputNumber>][, <inputString>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<state>(num)
<cmdType>(num)
<status>(num)
<inputNumber>(num)
<inputString>(str)
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16. Phonebook Commands
The AT commands described in this chapter allow the external application to access the phonebooks located in
the MC55i's memory or on the attached Subscriber Identity Module (SIM).
16.1 Sort Order for Phonebooks
Due to the support of UCS2 for the <text> part of phonebook entries, the sort order for phonebook records fol-
lows the algorithm published as Unicode Technical Standard #10, "Unicode Collation Algorithm".
A memory-optimized version of the proposed collation tables "[AllKeys]" from Unicode Technical Standard #10
is used in order to determine collation weights for Code points between 0000 and 06FF, and composed keys are
used for Code points from ranges 0700 to 33FF, A000 to D7FF and E000 to FFFD. Code Points not referenced
in these tables will be assigned a default collation weight with their unicode value as level 1 weight. Decomposi-
tion is not supported.
Phonebook entries whose names contain only characters from the GSM07.07 default alphabet are converted
internally into their UCS2 equivalents in order to achieve consistent sorting results.
For the user, this means that:
• Punctuation marks and other non-alphabetical characters from the common latin-based character sets, and
from the standard GSM character set, will be sorted before any alphabetical characters. The ordering in which
these marks appear as compared to other non-alphabetical characters from the same group is determined
by their collation weights and does not reflect their code values in the UCS2 or GSM alphabet tables above.
Please refer to www.unicode.org for detail.
• Alphabetical characters from the common latin-based character sets, and from the standard GSM character
set, will be sorted according to their underlying base characters, plus the collation weights of their accent
signs.
• Only collation levels 1 and 2 are regarded, so sorting is not case-sensitive.
Example: the european letters "Å" (GSM 0EH, UCS2 00C5h), "æ" (GSM 1DH, UCS2 00E6h), "ç" (GSM09h,
UCS2 00E7h), "a" (GSM 61H, UCS2 0061h ) and "b" (GSM 62H, UCS2 0062h) will be sorted in order "a", "Å",
"æ" "b","ç" although their numerical values in GSM and UCS2 suggest a different ordering.
Reference(s)
Unicode Technical Standard #10,"Unicode
Collation Algorithm"
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16.2 AT+CPBR Read from Phonebook
AT+CPBR serves to read one or more entries from the phonebook selected with AT command AT+CPBS.
The AT+CPBR test command returns the location range supported by the current phonebook storage, the maxi-
mum length of <number> field and the maximum length of <text> field.
Note: Length information may not be available while SIM storage is selected. If storage does not offer format
information, the format list contains empty parenthesizes.
The AT+CPBR write command determines the phonebook entry to be displayed with <location1> or a location
range from <location1> to <location2>. Hence, if no <location2> is given only the entry at
<location1> will be displayed.
If no entries are found at the selected location "OK" will be returned.
Syntax
Parameter Description
The first (lowest) location number within phonebook memory where to start reading. The maximum range sup-
ported by the current phonebook is given in the test command response.
If <location1> exceeds the upper bound <maxloc> (as indicated by the test command), command will
respond with "+CME ERROR: invalid index".
The last (highest) location number within phonebook memory where to stop reading. The maximum range sup-
ported by the current phonebook is given in the test command response.
If both <location1> and <location2> are in the range indicated by the test command parameter <max-
loc>, the list of entries will be output and terminated with "OK".
If <location2> exceeds the range indicated by the test command parameter <maxloc>, the list of entries will
be output but terminated with "+CME ERROR: invalid index".
Phone number in format specified by <type>, it may be an empty string.
Test Command
AT+CPBR=?
Response(s)
+CPBR: (1-<maxloc>), <nlength>, <tlength>
OK
+CME ERROR
Write Command
AT+CPBR=<location1>[, <location2>]
Response(s)
[+CPBR: <location1>, <number>, <type>, <text>]
[+CPBR: <location2>, <number>, <type>, <text>]
OK
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 11.11 + + + + + + - - -
<location1>(num)
<location2>(num)
<number>(str)
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Type of address octet, which defines the used type of number (ton) and the numbering plan identification (npi).
Please consider that for types other than 129 or 145 dialing from phonebook with ATD><mem><n> is, depending
on the network, not always possible (refer to GSM 04.08 subclause 10.5.4.7 for details). See also <type> of
AT+CPBW.
Possible values are:
145 Dialing string <number> includes international access code character '+'
161 National number. Network support of this type is optional.
209 Dialing string <number> has been saved as ASCII string and includes non-
digit characters other than "*", "#" or "+". Note that phonebook entries saved
with this type cannot be dialed.
255 Dialing string <number> is a command to control a Supplementary Service,
i.e. "*", "#" codes are contained. Network support of this type is optional.
129 Otherwise
Text assigned to a phone number. The maximum length for this parameter is given with test command response
parameter <tlength>.
If using an ASCII terminal characters which are coded differently in ASCII and GSM have to be entered via
escape sequences as described in Section 1.5, Supported character sets.
Maximum location number for the currently selected storage. For phonebooks located on the SIM this value
depends on the SIM card type.
Maximum length of phone number for "normal" locations. Depending on the storage a limited number of loca-
tions with extended memory is available per phonebook. These locations allow storing numbers with twice the
standard length, which is 2*<nlength> digits for normal numbers, but only <nlength> digits for numbers
saved with <type>=209.
Maximum length of <text> assigned to the telephone number. The value indicated by the test command is
given in octets. If <text> is given as GSM characters each character corresponds to one octet. If the <text>
string is given in UCS2, the maximum number of characters depends on the coding scheme used for the alpha
field of the SIM according to GSM 11.11, Annex B [21]. In the worst case the number of UCS2 characters is at
least one less than half the number of GSM characters.
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
<type>(num)
<text>(str)(+CSCS)
<maxloc>(num)
<nlength>(num)
<tlength>(num)
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Example
AT+CPBR=?
First run the AT+CPBR test command to find out the
maximum range of entries stored in the active
phonebook.
+CPBR:(1-100),20,17
MC55i returns the supported values, where 100 is
the supported range of location numbers, 20 is the
length of the phone number and 17 is the maximum
length of the associated text.
AT+CPBR =1,3
Then use the AT+CPBR write command to display
the phonebook entries sorted by location numbers.
+CPBR:1,"+999999",145,"Charlie"
+CPBR:2,"+777777",145,"Bill"
+CPBR:3,"+888888",145,"Arthur"
MC55i AT Command Set
16.3 AT+CPBS s
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16.3 AT+CPBS Select phonebook memory storage
AT+CPBS selects the active phonebook storage, i.e. the phonebook storage that all subsequent phonebook com-
mands will be operating on.
The read command returns the currently selected <storage>, the number of <used> entries and the <total>
number of entries available for this storage. The test command returns all supported <storage>s as compound
value.
Syntax
Parameter Description
“FD“ Fixed dialing phonebook
Capacity: depending on SIM
Location: SIM
“SM“(&F) SIM phonebook
Capacity: depending on SIM
Location: SIM
“ON“ MSISDN list
Capacity: depending on SIM
Location: SIM
“ME“ Mobile Equipment Phonebook
Capacity: max. 250 entries
Location: ME
“LD“ Last number dialed phonebook. Stores all voice call numbers dialed with ATD,
but no data call numbers.
Capacity: max. 10 entries
Location: depending on SIM this phonebook may reside partly or completely in
ME
AT+CPBW command is not applicable to this storage. The LD list can be deleted
with AT^SDLD or with AT^SPBD.
Test Command
AT+CPBS=?
Response(s)
+CPBS: (list of supported <storage>s)
OK
+CME ERROR
Read Command
AT+CPBS?
Response(s)
+CPBS: <storage>, <used>, <total>
OK
+CME ERROR
Write Command
AT+CPBS=<storage>
Response(s)
OK
+CME ERROR:
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM07.07 + + + + + + - - -
<storage>(str)
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“MC“ Missed (unanswered received) calls list
Capacity: max. 10 entries
Location: ME
AT+CPBW command is not applicable to this storage. The MC list can be
deleted with AT^SPBD.
“RC“ Received calls list
Capacity: max. 10 entries
Location: ME
AT+CPBW command is not applicable to this storage. The RC list can be
deleted with AT^SPBD.
“VM“ CPHS voice mailbox phonebook
Capacity: 1 or 2 entries, depending on SIM
1 - Line 1 mailbox
2 - Line 2 mailbox
Location: SIM
Value indicating the number of used locations in selected memory storage.
Value indicating the maximum number of locations allowed in the selected memory storage.
Notes
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
• If the SIM card is changed, all records of the "MC", "RC" and "LD" phonebooks stored on the ME will be
deleted automatically. If the same SIM is removed and reinserted, no automatic deletion is performed. Calls
made after last switch-on will be cleared from the "MC", "RC" and "LD" phonebook, if the SIM is removed and
reinserted during normal operation.
<used>(num)
<total>(num)
MC55i AT Command Set
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16.4 AT+CPBW Write into Phonebook
The AT+CPBW write command can be used to create, edit and delete a phonebook entry at a <location> of
the active storage selected with AT+CPBS.
If <storage>="FD" (SIM fixed dialing numbers) is selected, PIN2 authentication has to be performed prior to
any write access.
The AT+CPBW test command returns the location range supported by the current storage, the maximum length
of the <number> field, the range of supported <type> values and the maximum length of the <text> field.
Note: The length may not be available while SIM storage is selected. If storage does not offer format information,
the format list contains empty parenthesizes.
Syntax
Parameter Description
Location number within phonebook memory. The maximum range supported by each storage type is indicated
in the test command response. If <location> is not given, the first free entry will be used.
If <location> is given as the only parameter, the phonebook entry specified by <location> is deleted.
Phone number in format specified by <type>. Parameter must be present, although it may be an empty string.
Alphabetic characters are not permitted. <number> may contain dialstring modifiers "*", "#" or "+".
If other printable non-alphabetic characters are used the entry needs to be saved with <type>=209. Otherwise,
if <type>=209 is not used any non-digit characters other than "*", "#" or "+" will be removed from the string and
only accepted modifiers from the GSM alphabet will be saved.
A <number> saved with <type>=209 requires double memory. In order to fit into a standard location, the num-
ber needs to be reduced to a maximum length of <nlength>/2, including all digits and dial string modifiers.
Extended locations may be used as stated below for <nlength>.
Test Command
AT+CPBW=?
Response(s)
+CPBW: (1-<maxloc>), <nlength>, (list of supported <type>s), <tlength>
OK
ERROR
+CME ERROR
Write Command
AT+CPBW=[<location>][, <number>[[, <type>][, <text>]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07, GSM 04.08 + + + + + + - - -
<location>(num)
<number>(str)
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Type of address octet, which defines the used type of number (ton) and the numbering plan identification (npi).
Please consider that for types other than 129 or 145 dialing from phonebook with ATD><mem><n> is, depending
on the network, not always possible (refer GSM 04.08 subclause 10.5.4.7 for details).
If <type> is not specified the unknown <type>=129 is used. If <number> contains a leading "+" <type>=145
(international) is used.
Supported values are:
145 Dialing string <number> includes international access code character "+"
161 National number. The network support for this type is optional.
209 Dialing string <number> will be saved as ASCII string.
This is the default value, if <type> is not specified explicitly and characters
other than "*", "#" or "+" are included in <number>.
Note that phonebook entries saved with this type cannot be dialed.
255 Dialing string <number> is a command to control a Supplementary Service,
i.e. "*", "#" codes are contained. Network support of this type is optional.
129 Unknown number. If <type> is unknown and the <number> contains a lead-
ing "+", then this sign is removed.
Text assigned to the phone number. The maximum length of this parameter is given in the test command
response <tlength>. When using an ASCII terminal, characters which are coded differently in ASCII and GSM
have to be entered via escape sequences as described in Section 1.5, Supported character sets.
Maximum number of locations supported by the currently selected storage. For phonebooks located on SIM,
this value varies depending on the SIM card. See AT+CPBS for typical values.
Maximum length of phone number for "normal" locations. Depending on the storage, a limited number of loca-
tions with extended memory is available per phonebook. These locations allow storing numbers with twice the
standard length, which is 2*<nlength> digits for normal numbers, but only <nlength> digits for numbers
saved with parameter <type>= 209. If all extended locations of the selected phonebook are used up, then any
attempt to write a number which requires extended memory will be denied with CME ERROR 260: INVALID
DIAL STRING.
Maximum length of <text> assigned to the telephone number. The value indicated by the test command is
given in octets. If the <text> string is given in GSM characters, each character corresponds to one octet. If the
<text> string is given in UCS2, the maximum number of characters depends on the coding scheme used for
the alpha field of the SIM. In the worst case the number of UCS2 characters is at least one less than half the
number of GSM characters.
For a detailed description please refer to GSM 11.11, Annex B [21].
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
<type>(num)
<text>(str)(+CSCS)
<maxloc>(num)
<nlength>(num)
<tlength>(num)
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Examples
EXAMPLE 1
Make a new phonebook entry at the first free location
EXAMPLE 2
Delete entry at location 1
EXAMPLE 3
The following examples are provided to illustrate the effect of writing phonebook entries with different types
of dial string modifiers in <number>
EXAMPLE 4
Read phonebook entries from locations 5 - 9 via AT+CPBR
AT+CPBW=,"+431234567",145,"international"
AT+CPBW=1
AT+CPBW=5,"12345678",,"Arthur"
AT+CPBW=6,"432!+-765()&54*654#",,"John"
AT+CPBW=7,"432!+-765()&54*654#",129,"Eve"
AT+CPBW=8,"432!+-765()&54*654#",145,"Tom"
AT+CPBW=9,"432!+-765()&54*654#",209,"Richard"
+CPBR:5,"12345678",129,"Arthur"
+CPBR:6,"432!+-765()&54*654#",209,"John"
+CPBR:7,"432+76554*654#",129,"Eve"
+CPBR:8,"+432+76554*654#",145,"Tom"
+CPBR:9,"432!+-765()&54*654#",209,"Richard"
MC55i AT Command Set
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16.5 AT^SPBC Find first matching entry in sorted phonebook
The AT^SPBC write command searches the current phonebook for the index number of the first (lowest) entry
that matches the character specified with <schar>. The AT^SPBC test command returns the list of phonebooks
which can be searched through with AT^SPBC.
CAUTION: Please note that AT^SPBC is assigned the same index as AT^SPBG or AT^SPBS which is not identical
with the physical location numbers used in the various phonebooks. Therefore, do not use the index numbers
retrieved with AT^SPBC to dial out or modify phonebook entries.
Syntax
Parameter Description
First character of the entry to be searched in the sorted list of phonebook entries.
In the active phonebook, the first (lowest) index number of an entry beginning with <schar>. As stated above,
the retrieved index number shall not be used to dial out or edit phonebook entries. If no matching phonebook
entry is found, <index>=0 will be returned.
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SPBC=?
Response(s)
^SPBC: "FD","SM","ME"
OK
ERROR
+CME ERROR
Write Command
AT^SPBC=<schar>
Response(s)
^spbc: <index>
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<schar>(str)
<index>(num)
MC55i AT Command Set
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16.6 AT^SPBD Purge phonebook memory storage
AT^SPBD can be used to purge the selected phonebook <storage> manually, i.e. all entries stored in the
selected phonebook storage will be deleted. CAUTION! The operation cannot be stopped nor reversed!
The AT^SPBD test command returns the list of phonebooks which can be deleted with AT^SPBD.
An automatic purge of the phonebooks is performed when the SIM card is removed and replaced with a different
SIM card. This affects the ME based part of the "LD" storage, and storages "MC" and "RC". Storage "ME" is not
affected.
Syntax
Parameter Description
If test command: List of phonebooks which can be deleted by AT^SPBD.
If write command: Phonebook to be deleted.
For a detailed description of storages see AT+CPBS.
“LD“ Last number dialed phonebook
“MC“ Missed (unanswered received) calls list
“RC“ Received calls list
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SPBD=?
Response(s)
^SPBD: list of supported <storage>s
OK
+CME ERROR
Write Command
AT^SPBD=<storage>
Response(s)
OK
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<storage>(str)
MC55i AT Command Set
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16.7 AT^SPBG Display phonebook entries in alphabetical order
AT^SPBG sorts the entries of the current phonebook in alphabetical order by name (the first six characters mat-
ter). The sort order is described in Section 16.1, Sort Order for Phonebooks.
There are two ways to use AT^SPBG:
• If the optional parameter <RealLocReq> equals 0 or is omitted the sorted entries will be sequentially num-
bered. As these numbers are not identical with the location numbers stored in the various phonebooks
AT^SPBG can be used for reading only. For example, it helps you find entries starting with matching charac-
ters. Do not use the serial numbers to dial out or modify entries.
• If parameter <RealLocReq>=1 is given by the write command, the response parameter <location> addi-
tionally appended to each entry indicates the actual location number. This number can be used for editing
with AT+CPBW or dialing with ATD><mem><n>. The first index number of each entry is only the serial number
of the sorted list.
Before using the AT^SPBG write command it is recommended to query the number of records currently stored in
the active phonebook (refer to test command parameter <used>). The test command also includes the param-
eters <nlength> and <tlength>. Note that if SIM storage is selected the length may not be available. If stor-
age does not offer format information, the format list should be empty parenthesises.
Syntax
Parameter Description
First index number in the sorted list where to start reading. The supported range is given in the test command
response.
If <index 1> exceeds the upper bound <used>, "+CME ERROR: "invalid index" will be returned.
Last index number in the sorted list where to stop reading. The supported range is given in the test command
response.
If <index2> is not given via write command, only the entry located at <index1> will be displayed.
If both <index1> and <index2> are in the range indicated by the test command parameter <used>, the list
of entries will be output and terminated with OK.
If <index2> exceeds the range indicated by the test command parameter <used>, the list of entries will be
output but terminated with a "+CME ERROR: "invalid index".
Test Command
AT^SPBG=?
Response(s)
^SPBG: (1-<used>), <nlength>, <tlength>
OK
ERROR
+CME ERROR
Write Command
AT^SPBG=<index1>[, <index2>][, <RealLocReq>]
Response(s)
[^SPBG: <index1>, <number>, <type>, <text>[, <location>]]
[^SPBG: <index2>, <number>, <type>, <text>[, <location>]]
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<index1>(num)
<index2>(num)
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Is a display of the "real" <location> of the entry required?
[0] Do not show an entry's "real" location number. Parameter <location> will not
be displayed.
1 Show the "real" location number as parameter <location> at the end of each
entry.
String type phone number in format specified by <type>.
The number parameter may be an empty string.
Type of address octet, which defines the used type of number (ton) and the numbering plan identification (npi).
Please consider that for types other than 129 or 145 dialing from phonebook with ATD><mem><n> is, depending
on the network, not always possible (refer to GSM 04.08 subclause 10.5.4.7 for details). See also <type> of
AT+CPBW.
Possible values are:
145 Dialing string <number> includes international access code character '+'
161 National number. Network support of this type is optional.
209 Dialing string <number> has been saved as ASCII string and includes non-
digit characters other than "*", "#" or "+". Note that phonebook entries saved
with this type cannot be dialed.
255 Dialing string <number> is a command to control a Supplementary Service,
i.e. "*", "#" codes are contained. Network support of this type is optional.
129 Otherwise
Text assigned to the phone number. The maximum length for this parameter is given in test command response
<tlength>.
Value indicating the number of used locations in selected memory storage.
The location within phonebook memory at which the corresponding entry is located.
This location may be used for other commands (e.g. AT+CPBR or ATD><mem><n>)
Maximum length of phone number for "normal" locations. Depending on the storage, a limited number of loca-
tions with extended memory is available per phonebook. Please refer to AT command AT+CPBW for detail.
Maximum length of <text> assigned to the telephone number. The value indicated by the test command is
given in octets. If the <text> string is given in GSM characters, each character corresponds to one octet. If the
<text> string is given in UCS2, the maximum number of characters depends on the coding scheme used for
the alpha field of the SIM according to GSM 11.11, Annex B [21]. In the worst case the number of UCS2 char-
acters is at least one less than half the number of GSM characters.
<RealLocReq>(num)
<number>(str)
<type>(num)
<text>(str)(+CSCS)
<used>(num)
<location>(num)
<nlength>(num)
<tlength>(num)
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Notes
• The command can be used for the phonebooks "SM", "FD", "ME" (cf. AT+CPBS).
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Examples
EXAMPLE 1
Using AT^SPBG without <RealLocReq>:
The numbers at the beginning of each line are not the memory locations in the phonebook, but only serial
numbers assigned to the entries' positions in the alphabetical list.
EXAMPLE 2
Using AT^SPBG with <RealLocReq>:
The numbers at the end of each line are the memory locations in the phonebook and can be used for dialing
or editing phonebook entries:
AT^SPBG=?
First run the AT^SPBG test command to find out the
range of entries stored in the current phonebook.
^SPBG: (1-33),20,17
TA returns the range, where 33 is the number of
entries stored in the current phonebook.
AT^SPBG=1,33
Now, enter the write command. To obtain best
results it is recommended to query the full range of
entries. TA returns phonebook entries in alphabetical
order.
^SPBG:1,"+999999",145,"Arthur"
^SPBG:2,"+777777",145,"Bill"
^SPBG:3,"+888888",145,"Charlie"
......................
AT^SPBG=?
First run the AT^SPBG test command to find out the
range of entries stored in the current phonebook.
^SPBG: (1-33),20,17
TA returns the range, where 33 is the number of
entries stored in the current phonebook.
AT^SPBG=1,33,1
Now, enter the write command including parameter
<RealLocReq>=1 to get the actual location num-
bers.
^SPBG:1,"+999999",145,"Arthur",27
^SPBG:2,"+777777",145,"Bill",6
^SPBG:3,"+888888",145,"Charlie",15
......................
AT+CPBR=27
Read out phonebook location 27.
+CPBR: 27,"+999999",145,"Arthur"
This entry can be edited with AT+CPBW or used for
dialing with ATD><mem><n>.
MC55i AT Command Set
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16.8 AT^SPBS Step through the selected phonebook alphabetically
AT^SPBS can be used to scroll sequentially through the active phonebook records in alphabetical order by name.
Three entries will be displayed at a time.
Every time the write command is executed, 3 rows of phonebook records are returned. Each triplet overlaps with
the next one. The actual index depends on parameter <value>. This parameter determines whether the index
will be increased or decreased.
If the index in one output line reaches the last index in the alphabetical list, the next output line will display the
first list entry.
After the last record of the phonebook has been reached (see parameter <used> for AT^SPBG), the <inter-
nal-counter> switches over to the first.
There are two ways to use AT^SPBS:
• If the optional parameter <RealLocReq> is omitted or (0) the sorted entries will be sequentially numbered.
As these numbers are not identical with the location numbers stored in the various phonebooks AT^SPBS can
be used for reading only. For example, it helps you find entries starting with matching characters. Do not use
the serial numbers to dial out or modify entries.
• If parameter <RealLocReq>=1 is given by the write command, the response parameter <location> addi-
tionally appended to each entry indicates the actual location number. This number can be used for editing
with AT+CPBW or dialing with ATD><mem><n>. The first index number of each entry is only the serial number
of the sorted list.
See examples below.
Syntax
Parameter Description
1 To make a step forward in the alphabetically sorted phonebook.
2 To make a step backward in the alphabetically sorted phonebook.
1...maxindex The index in the sorted list of phonebook entries that identifies the first entry
displayed.
The value of <index-a> is determined by the value of the <internal-
counter> and by parameter <value>.
Test Command
AT^SPBS=?
Response(s)
^SPBS: (list of supported <value>)
OK
Write Command
AT^SPBS=<value>[, <RealLocReq>]
Response(s)
^SPBS: <index-a>, <number>, <type>, <text>[, <location>]
^SPBS: <index-b>, <number>, <type>, <text>[, <location>]
^SPBS: <index-c>, <number>, <type>, <text>[, <location>]
OK
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
<value>(num)
<index-a>(num)
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After a write command has terminated successfully with "OK", the value from
parameter <index-a> is saved and retained as the new <internal-
counter> value.
Mind after the last record of phonebook, the first entry follows.
1...maxindex The index in the sorted list of phonebook entries that identifies the second entry
displayed.
<index-b>= (<index-a>+1).
Mind after the last record of phonebook, the first entry follows.
1...maxindex The index in the sorted list of phonebook entries that identifies the third entry
displayed.
<index-c>= (<index-b>+1).
Mind after the last record of phonebook, the first entry follows.
String type phone number in format specified by <type>.
the number parameter may be an empty string.
Type of address octet, which defines the used type of number (ton) and the numbering plan identification (npi).
Please consider that for types other than 129 or 145 dialing from phonebook with ATD><mem><n> is, depending
on the network, not always possible (refer to GSM 04.08 subclause 10.5.4.7 for details). See also <type> of
AT+CPBW.
Possible values are:
145 Dialing string <number> includes international access code character '+'
161 National number. Network support of this type is optional.
209 Dialing string <number> has been saved as ASCII string and includes non-
digit characters other than "*", "#" or "+". Note that phonebook entries saved
with this type cannot be dialed.
255 Dialing string <number> is a command to control a Supplementary Service,
i.e. "*", "#" codes are contained. Network support of this type is optional.
129 Otherwise
Text assigned to the phone number.
Is a display of the "real" <location> of the entry required?
[0] Do not show an entry's "real" location number. Parameter <location> will not
be displayed
1 Show the "real" location number as parameter <location> at the end of the
entry
The location within phonebook memory at which the corresponding entry is located.
This location may be used for other phonebook commands (e.g. AT+CPBR, AT+CPBW, ATD><mem><n>).
<index-b>(num)
<index-c>(num)
<number>(str)
<type>(num)
<text>(str)(+CSCS)
<RealLocReq>(num)
<location>(num)
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0(&F)...maxindex This parameter is only an internal parameter and cannot modified directly.
The internal counter will be reset to index 0 after a call to ATZ or AT&F.
Notes
• The complete list of sorted entries can be retrieved using AT command AT^SPBG.
• The command can be used for the phonebooks "SM", "FD", "ME" (cf. AT+CPBS).
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Examples
EXAMPLE 1
This example illustrates how to search down and up again using AT^SPBS=1 and 2:
EXAMPLE 2
This example shows that when the last index in the sorted list has been reached, the internal counter over-
flows to the first index.
<internal-counter>(num)
at&f
First, AT&F is issued to make sure that AT^SPBS=1
starts from the first character in alphabetical order.
OK
at^spbs=1
^SPBS:1,"+999999",145,"Arthur"
^SPBS:2,"+777777",145,"Bill"
^SPBS:3,"+888888",145,"Charlie"
OK
at^spbs=1
^SPBS:2,"+777777",145,"Bill"
^SPBS:3,"+888888",145,"Charlie"
^SPBS:4,"0304444444",129,"Esther"
OK
at^spbs=1
^SPBS:3,"+888888",145,"Charlie"
^SPBS:4,"0304444444",129,"Esther"
^SPBS:5,"03033333333",129,"Harry"
OK
at^spbs=2
^SPBS:2,"+777777",145,"Bill"
^SPBS:3,"+888888",145,"Charlie"
^SPBS:4,"0304444444",129,"Esther"
OK
at&f
Reset internal counter to 0.
OK
at^spbs=2
Step down one entry starting from (internal
counter)=0 - overflow occurs.
^SPBS:33,"+49301234567",145,"TomTailor"
^SPBS:1,"+999999",145,"Arthur"
^SPBS:2,"+777777",145,"Bill"
OK
MC55i AT Command Set
16.8 AT^SPBS s
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EXAMPLE 3
Using AT^SPBS with <RealLocReq>=1 in order to obtain the entries' location numbers:
The numbers at the end of each line are the memory locations in the phonebook and can be used for dialing
or editing phonebook entries:
at^spbs=1,1
^SPBS:1,"+999999",145,"Arthur",27
^SPBS:2,"+777777",145,"Bill",6
^SPBS:3,"+888888",145,"Charlie",15
at+cpbr=27
Read out phonebook location 27.
+CPBR: 27,"+999999",145,"Arthur"
This entry can be edited with AT+CPBW or used for
dialing with ATD><mem><n>.
MC55i AT Command Set
16.9 AT+CNUM s
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16.9 AT+CNUM Read own numbers
AT+CNUM returns the subscribers own number(s) from the SIM.
Syntax
Parameter Description
Optional alphanumeric string associated with <number>.
Phone number in format specified by <type>.
Type of address octet, see also: AT+CPBR <type>.
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT+CNUM=?
Response(s)
OK
Exec Command
AT+CNUM
Response(s)
[+CNUM: [<alpha>], <number>, <type>]
[+CNUM: ... ]
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 + + + + + + - - -
<alpha>(str)
<number>(str)
<type>(str)
MC55i AT Command Set
16.10 AT^SDLD s
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16.10 AT^SDLD Delete the 'last number redial' memory
AT^SDLD deletes all numbers stored in the "LD" memory.
Syntax
Note
• Users should be aware that when using this AT command quickly after SIM PIN authentication the SIM data
may not yet be accessible, resulting in a short delay before the requested AT command response is returned.
See Section 20.1, Restricted access to SIM data after SIM PIN authentication for further detail.
Test Command
AT^SDLD=?
Response(s)
OK
Exec Command
AT^SDLD
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS + + + + + + - - -
MC55i AT Command Set
17. Audio Commands s
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17. Audio Commands
The AT Commands described in this chapter are related to the MC55i's audio interface.
17.1 Audio programming model
The following figure illustrates how the signal path can be adjusted with the parameters <inCalibrate>,
<inBbcGain>, <outBbcGain>, <outCalibrate> and <sideTone> as well as <io>, <mic> and <ep>.
Figure 17.1: Audio programming model for MC55i Module
MC55i AT Command Set
17.2 ATL s
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17.2 ATL Set monitor speaker loudness
ATL is implemented for V.250ter compatibility reasons only, and has no effect. In multiplex mode (refer
AT+CMUX) the command is supported on logical channel 1 only.
Syntax
Parameter Description
17.3 ATM Set monitor speaker mode
ATM is implemented for V.250ter compatibility reasons only, and has no effect. In multiplex mode (refer
AT+CMUX) the command is supported on logical channel 1 only.
Syntax
Parameter Description
Exec Command
ATL[<val>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<val>(num)
Exec Command
ATM[<val>]
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + - + - - - - -
<val>(num)
MC55i AT Command Set
17.4 AT+CLVL s
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17.4 AT+CLVL Loudspeaker volume level
Syntax
Parameter Description
Loudspeaker Volume Level
0...4(D)
Notes
• The write command can only be used in audio mode 2 - 6.
• The values of the volume steps are specified with the parameters <outCalibrate>[0],...<outCali-
brate>[4] of the AT^SNFO command.
• As an alternative to AT+CLVL, you can use AT^SNFO and AT^SNFV. The parameter <level> is identical with
<outStep> used by both commands.
• Any change to <level> (or <outStep>) takes effect in audio modes 2 to 6. That is, when you change
<level> (or <outStep>) and then select another mode with AT^SNFS, the same step will be applied.
The only exception is audio mode 1 which is fixed to <level>=4 (or accordingly <outStep>=4).
•<level> (or <outStep>) is stored non-volatile when the ME is powered down with AT^SMSO or reset with
AT+CFUN=1,1.
Test Command
AT+CLVL=?
Response(s)
+CLVL: (list of supported<level>s)
OK
Read Command
AT+CLVL?
Response(s)
+CLVL: <level>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CLVL=<level>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<level>(num)
MC55i AT Command Set
17.5 AT+CMUT s
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17.5 AT+CMUT Mute control
The AT+CMUT command mutes the microphone input. The command can be used in all audio modes (1 to 6) and
during a voice call only. See AT^SNFS for more details on the various audio modes. As alternative, you can use
the AT^SNFM command.
During an active call, users should be aware that when they switch back and forth between different audio modes
(for example handsfree on/off) the value of <mute> does not change, i.e. the microphone mode is retained until
explicitly changed.
Syntax
Parameter Description
0(P) Mute off
1 Mute on
Test Command
AT+CMUT=?
Response(s)
+CMUT: (list of supported<mute>s)
OK
Read Command
AT+CMUT?
Response(s)
+CMUT: <mute>
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CMUT=<mute>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<mute>(num)
MC55i AT Command Set
17.6 AT+VTD s
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17.6 AT+VTD Tone duration
This command refers to an integer <duration> that defines the length of tones transmitted with the AT+VTS
command.
Syntax
Parameter Description
Duration of the DTMF signal in 1/10 seconds with tolerance.
The minimum duration of DTMF signals is 300ms. DTMF tones below 300ms cannot be generated.
1(&F)(P)...255
Test Command
AT+VTD=?
Response(s)
+VTD: (list of supported<duration>s)
OK
Read Command
AT+VTD?
Response(s)
<duration>
OK
Write Command
AT+VTD=<duration>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<duration>(num)
MC55i AT Command Set
17.7 AT+VTS s
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17.7 AT+VTS DTMF and tone generation
AT+VTS is intended to send ASCII characters or strings which cause the Mobile Switching Center (MSC) to trans-
mit DTMF tones to a remote subscriber. The command can only be used during active voice calls and offers the
following variants:
•AT+VTS=<dtmfString> allows to send a sequence of DTMF tones with a duration defined with AT+VTD.
•AT+VTS=<dtmf>[,<duration>] allows to send a single DTMF tone. In this case, the duration can be ind-
vidually determined during the call.
Syntax
Parameter Description
String of ASCII characters in the set 0-9,#,*,A, B, C, D. Maximal length of the string is 29. The string must be
enclosed in quotation marks ("...").
ASCII character in the set 0...9,#,*, A, B, C, D.
Tone duration in 1/10 seconds with tolerance. If not specified current setting of AT+VTD is used.
The minimum duration of DTMF signals is 300ms. DTMF tones below 300ms cannot be generated.
1...255
Test Command
AT+VTS=?
Response(s)
+VTS: (list of supported<dtmf>s), (list of supported<duration>s)
OK
Write Command
AT+VTS=<dtmfString>
Response(s)
OK
Write Command
AT+VTS=<dtmf>[, <duration>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + - - -
<dtmfString>(str)
<dtmf>(str)
<duration>(num)
MC55i AT Command Set
17.8 AT^SAIC s
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17.8 AT^SAIC Audio Interface Configuration
AT^SAIC configures the interface connections of the active audio mode. The write command is usable in audio
modes 2 to 6 only.
If AT^SNFS=1, any attempt to use AT^SAIC write command is rejected with error response. This is because all
default parameters in audio mode 1 are determined for type approval and are not adjustable.
To allocate a specific audio mode to one of the audio interfaces, first select the audio mode with AT^SNFS and
then choose the interface using AT^SAIC.
Syntax
Parameter Description
Input and output selection
1 Digital input and output
2 Analog input and output
Microphone selection
1 Microphone 1
2 Microphone 2
Select differential earpiece amplifier
1 Selects the earpiece amplifier 1
2 Selects the earpiece amplifier 2
3 Selects both amplifiers. Note that both amplifiers are connected in parallel and
therefore, get the same output power if <ep>=3.
Test Command
AT^SAIC=?
Response(s)
^SAIC:(list of supported <io>s), (list of supported<mic>s), (list of supported<ep>s)
OK
Read Command
AT^SAIC?
Response(s)
^SAIC: <io>, <mic>, <ep>
OK
Write Command
AT^SAIC=<io>[, <mic>[, <ep>]]
Response(s)
OK
ERROR
+CME ERROR: operation not allowed
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<io>(num)(^SNFW)
<mic>(num)(^SNFW)
<ep>(num)(^SNFW)
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Notes
• The factory defaults of AT^SAIC vary with the selected audio mode.
If AT^SNFS=1 or 4 or 5, then AT^SAIC=2,1,1.
If AT^SNFS=2 or 3 or 6, then AT^SAIC=2,2,2.
AT^SNFD can be used to reset the factory defaults.
• For use after restart of the ME, you are advised to store the settings of AT^SAIC and AT^SNFS to the audio
profile saved with AT^SNFW. Otherwise, audio mode 1 (AT^SNFS=1) and audio interface 2 (AT^SAIC=2,1,1)
will be active each time the ME is powered up.
MC55i AT Command Set
17.9 AT^SNFA s
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17.9 AT^SNFA Set or query of microphone attenuation
AT^SNFA specifies the large-scale attenuation on the microphone path of the audio device currently selected
with AT^SNFS. The write command is only available in audio modes 2 to 6.
Syntax
Parameter Description
Multiplication factor for input samples. Parameter <atten> is identical with <inCalibrate> of AT^SNFI.
Formula used to calculate microphone attenuation (negative gain):
Gain in dB = 20 * log(<atten>/32768)
0...32767(P)...65535
0 Microphone is muted.
Please note that AT^SNFA cannot be used to mute the microphone. Therefore,
any attempt to enter 0 will be rejected with error response. Value 0 is returned
only by the read command AT^SNFA? after the microphone was muted with
AT^SNFM=0 during an active call.
32767 No attenuation on the microphone path
Values greater than 32767 will be suppressed to 32767.
Notes
• This command is provided for compatibility with former products (e.g. M20) and is a subset of AT^SNFI. The
parameter <inCalibrate> of AT^SNFI is identical with <atten> of AT^SNFA.
• To make the changes persistent use AT^SNFW.
Test Command
AT^SNFA=?
Response(s)
^SNFA: (list of supported <atten>s)
OK
Read Command
AT^SNFA?
Response(s)
^SNFA: <atten>
OK
Write Command
AT^SNFA=<atten>
Response(s)
OK
ERROR
CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<atten>(num)(^SNFW)
MC55i AT Command Set
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Example
^SYSSTART
at^snfa=?
^SNFA: (0-65535)
OK
at^snfa?
^SNFA: 32767
OK
at^snfs=4
OK
at^snfa=1
OK
at^snfa?
^SNFA: 1
OK
at^snfi?
^SNFI: 5,1
OK
at^snfi=5,45
OK
at^snfa?
^SNFA: 45
OK
MC55i AT Command Set
17.10 AT^SNFD s
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17.10 AT^SNFD Set audio parameters to manufacturer default values
AT^SNFD sets the active audio parameters to manufacturer defined default values. These default values can be
changed and stored by the user and also by download with a new set of parameters.
The restored values are:
AT^SNFA: <atten>
AT^SNFI: <inBbcGain>, <inCalibrate>
AT^SNFO: <outBbcGain>, <outCalibrate>[0 to 4], <sideTone>
AT^SAIC: <io>, <mic>, <ep>
AT^SNFS: <audMode>
Syntax
Note
• Remember that the factory set audio mode 1 is fixed to <outStep>=4. Consequently, AT^SNFD restores
<audMode> together with <outStep>=4, but does not affect the values of <outStep> currently selected in
audio modes 2 - 6. This means, if <audMode>=1, the read commands AT^SNFO, AT^SNFV and AT+CLVL will
always deliver <outStep>=4. In all other modes the <outStep> value is retained until explicitly changed.
Test Command
AT^SNFD=?
Response(s)
OK
Exec Command
AT^SNFD
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
MC55i AT Command Set
17.11 AT^SNFI s
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17.11 AT^SNFI Set microphone path parameters
AT^SNFI controls the microphone path amplification. Read and write options of this command refer to the active
audio mode. The write command works only in audio modes 2 to 6.
Syntax
Parameter Description
ADC gain adjustable in eight 6 dB steps from 0 dB to 42 dB (0=0dB, 7=42dB, 8 steps of 6 dB).
0...7
Multiplication factor for input samples. Formula to calculate the negative gain (attenuation) of the input signal:
Gain in dB = 20 * log (inCalibrate / 32768)
0...32767
Notes
• The range of <inCalibrate> is up to 65535 but will be suppressed to 32767. Values above <inCali-
brate>= 65535 will cause a failure.
• The parameter <inCalibrate> of AT^SNFI is identical with <atten> of AT^SNFA.
• For use after restart, changed values can be stored with AT^SNFW.
• Attention! When you adjust audio parameters avoid exceeding the maximum allowed level. Bear in mind that
exposure to excessive levels of noise can cause physical damage to users!
Test Command
AT^SNFI=?
Response(s)
^SNFI: (list of supported <inBbcGain>s) , (list of supported <inCalibrate>s)
OK
Read Command
AT^SNFI?
Response(s)
^SNFI: <inBbcGain>, <inCalibrate>
OK
Write Command
AT^SNFI=<inBbcGain>, <inCalibrate>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<inBbcGain>(num)(^SNFW)
<inCalibrate>(num)(^SNFW)
MC55i AT Command Set
17.12 AT^SNFM s
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17.12 AT^SNFM Set microphone audio path and power supply
The AT^SNFM read command returns the microphone mute and supply voltage status.
The AT^SNFM write command can be used to switch the microphone's audio path (muted / not muted) or to con-
trol the power supply of the MICP2 line (microphone input of the second analog audio interface).
The microphone can be muted or activated by changing <MicSwitch> in all audio modes (1 to 6) and during a
voice call only. As an alternative, you can use the AT+CMUT command to mute the microphone.
Syntax
Parameter Description
Microphone mute control parameter.
Evaluated only during voice calls and if <MicVccCtl> is omitted, e.g. AT^SNFM=1.
Command does not depend on audio mode.
0 Mutes the microphone.
1(P) Activates the microphone.
Microphone supply voltage control parameter. Setting applies to microphone input 2 only.
CME error is given if <MicSwitch> is not omitted. Enter for example AT^SNFM=,1 or AT^SNFM=,2.
0 Supply voltage is always switched off.
1 Supply voltage is always switched on.
2(P) Supply voltage state during voice calls is controlled by the ME. Actual value is
determined by parameter data set of the selected audio mode.
Test Command
AT^SNFM=?
Response(s)
^SNFM: (list of supported <MicSwitch>s) , (list of supported <MicVccCtl>s)
OK
Read Command
AT^SNFM?
Response(s)
^SNFM: <MicSwitch>, <MicVccState>
OK
Write Command
AT^SNFM=[<MicSwitch>][, <MicVccCtl>]
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<MicSwitch>(num)
<MicVccCtl>(num)
MC55i AT Command Set
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Microphone supply voltage control status.
0 Supply voltage was set to a constant value.
2 Supply voltage state is controlled by the ME and depends on parameter data
set of the selected audio mode.
Notes
• The programmable power supply of the MICP2 line gives you greater flexibility in connecting audio accesso-
ries or using MICP2 for a variety of functions other than audio. A detailed description of the extended usage
of MICP2 can be found in [8].
• During an active call, users should be aware that when they switch back and forth between different audio
modes (for example handsfree on/off) the value of <MicSwitch> does not change, i.e. the microphone mode
is retained until explicitly changed.
<MicVccState>(num)
MC55i AT Command Set
17.13 AT^SNFO s
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17.13 AT^SNFO Set audio output (= loudspeaker path) parameter
AT^SNFO controls the earpiece path amplification. The read and write commands refer to the active audio mode.
The write command works only in audio modes 2 to 6.
Syntax
Parameter Description
Negative DAC gain (attenuation) adjustable in four 6 dB steps from 0 dB to -18 dB (0=0 dB, 3=-18 dB)
0...3
Formula to calculate the value of the 5 volume steps selectable with parameter <outStep>:
Attenuation = 20 * log (2 * outCalibrate[n] / 32768)
0...32767
Volume steps 0 - 4, each defined with outCalibrate[n]
0...[4]
Multiplication factor for the sidetone gain.
Formula to calculate how much of the original microphone signal is added to the earpiece signal:
Sidetone gain in dB = 20 * log (sideTone / 32768).
0...32767
Test Command
AT^SNFO=?
Response(s)
^SNFO: (list of supported <outBbcGain>s), (list of supported <outCalibrate>s), (list of supported
<outStep>s), (list of supported <sideTone>s)
OK
Read Command
AT^SNFO?
Response(s)
^SNFO: <outBbcGain>, <outCalibrate>[0] , <outCalibrate>[1] , <outCalibrate>[2] ,
<outCalibrate>[3] , <outCalibrate>[4] , <outStep>, <sideTone>
OK
Write Command
AT^SNFO=<outBbcGain>, <outCalibrate>[0] , <outCalibrate>[1] , <outCalibrate>[2] ,
<outCalibrate>[3] , <outCalibrate>[4] , <outStep>, <sideTone>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<outBbcGain>(num)(^SNFW)
<outCalibrate>(num)(^SNFW)
<outStep>(num)
<sideTone>(num)(^SNFW)
MC55i AT Command Set
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Notes
•<outCalibrate> specifies the amount of volume of each <outStep>. The range of each <outCali-
brate> is up to 65535, but will be suppressed to 32767. A value above <outCalibrate>= 65535 will cause
an error.
• The range of <sideTone> is up to 65535, but will be suppressed to 32767. A value above <sideTone>=
65535 will cause an error.
• Any change to <outStep> takes effect in audio modes 2 to 6. That is, when you change <outStep> and
then select another mode with AT^SNFS, the same step will be applied. Nevertheless, the sound quality and
the amount of volume are not necessarily the same, since all remaining audio parameters can use different
values in either mode.
• Audio mode 1 is fixed to <outStep>=4. In this mode, any attempt to change <outStep> or other parameters
returns an error.
• The value of <outStep> is stored non-volatile when the ME is powered down with AT^SMSO or reset with
AT+CFUN=x,1. Any other parameters changed with AT^SNFO need to be saved with AT^SNFW for use after
restart. See also AT^SNFD for details on restoring factory defaults.
• The values of <outStep> can also be changed with AT^SNFV and AT+CLVL.
• CAUTION! When you adjust audio parameters avoid exceeding the maximum allowed level. Bear in mind that
exposure to excessive levels of noise can cause physical damage to users!
MC55i AT Command Set
17.14 AT^SNFPT s
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17.14 AT^SNFPT Set progress tones
AT^SNFPT controls the Call Progress Tones generated at the beginning of a mobile originated call setup.
Please note that the setting is stored volatile, i.e. after restart or reset, the default value 1 will be restored.
Syntax
Parameter Description
0 Disables Call Progress Tones
1(P) Enables Call Progress Tones (audible tones shortly heard on the phone when
ME starts to set up a call.)
Test Command
AT^SNFPT=?
Response(s)
^SNFPT: (list of supported <pt>s)
OK
Read Command
AT^SNFPT?
Response(s)
^SNFPT: <pt>
OK
Write Command
AT^SNFPT=<pt>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<pt>(num)
MC55i AT Command Set
17.15 AT^SNFS s
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17.15 AT^SNFS Select audio hardware set
The AT^SNFS write command serves to set the audio mode required for the connected equipment.
AT^SNFS can also be used in conjunction with AT^SAIC. This is useful, for example, if the audio interfaces are
operated alternatively to benefit from different devices. Each audio mode can be assigned a specific interface.
To do so, first select the audio mode with AT^SNFS, then activate the audio interface with AT^SAIC and finally
enter AT^SNFW to store the settings to your audio profile. To switch back and forth it is sufficient to use AT^SNFS.
Syntax
Parameter Description
0 Audio mode 0: Test mode with activated audio loop. It is not possible to switch
to this mode using AT^SNFS. Use AT^SCFG="Audio/Loop" instead (see
description for AT^SCFG parameter <al> for details).
[1] Audio mode 1: Standard mode optimized for the reference handset, that can
be connected to the analog interface 1 (see "MC55i Hardware Interface
Description" for information on this handset.) To adjust the volume use the
knob of the reference handset. In audio mode 4, this handset can be used with
user defined parameters.
Note: The default parameters are determined for type approval and are not
adjustable with AT commands.
AT^SNFD restores <audMode> 1.
2 Audio mode 2: Customer specific mode for a basic handsfree (speakerphone)
device (Siemens Car Kit Portable).
Analog interface 2 is assumed as default.
3 Audio mode 3: Customer specific mode for a mono-headset.
Analog interface 2 is assumed as default.
4 Audio mode 4: Customer specific mode for a user handset.
Analog interface 1 is assumed as default.
Test Command
AT^SNFS=?
Response(s)
^SNFS: (list of supported <audMode>s)
OK
Read Command
AT^SNFS?
Response(s)
^SNFS: <audMode>
OK
Write Command
AT^SNFS=<audMode>
Response(s)
OK
ERROR
CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<audMode>(num)(^SNFW)
MC55i AT Command Set
17.15 AT^SNFS s
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5 Audio mode 5: Customer specific mode.
Analog interface 1 is assumed as default.
6 Audio mode 6: Customer specific mode.
Analog interface 2 is assumed as default.
Notes
• The write command can be used during a voice call to switch back and forth between different modes. This
allows the user, for example, to switch handsfree operation (speakerphone) on and off.
• Users should be aware that <outStep> is a global setting. This means, when another audio mode is selected
during a call, the value of <outStep> does not change. This is also true for mute operation which can be set
with AT^SNFM or AT+CMUT: If the microphone is muted and the user selects another audio mode during the
call, then the microphone remains muted until explicitly changed. Exception: In audio mode 1 <outStep>=4
is fix.
• For use after restart of the module, you are advised to store the selected mode to the audio profile saved with
AT^SNFW. Otherwise, audio mode 1 will be active each time the module is powered up.
•
Examples
EXAMPLE 1
Suppose a user wishes to use alternatively a handsfree device (speakerphone) and a handset. The handset
can be connected to the first analog interface and adjusted to audio mode 4. The handsfree device can be
attached to the second analog interface and adjusted to audio mode 2. The factory defaults of AT^SAIC need
not be changed.
Settings for the handset:
Settings for the handsfree device:
To store the configuration to the user defined audio profile:
To switch back and forth:
EXAMPLE 2
The following example illustrates a combination of a handset and a handsfree device connected to other inter-
faces than those assumed as factory default.
Settings for a handset connected to the second analog interface and adjusted to audio mode 4:
Settings for a handsfree device connected to the first analog interface and adjusted to audio mode 2:
AT^SNFS=4
OK
AT^SAIC?
Factory default of AT^SAIC assigned to audio mode 4.
^SAIC: 2,1,1
OK
AT^SNFS=2
OK
AT^SAIC?
Factory default of AT^SAIC assigned to audio mode 2.
^SAIC: 2,2,2
OK
AT^SNFW
Stores the audio mode and the interface.
OK
AT^SNFS=4
Switches to the handset connected to analog interface 1.
OK
AT^SNFS=2
Switches to the handsfree device at analog interface 2.
OK
AT^SNFS=4
OK
AT^SAIC=2,2,2
OK
MC55i AT Command Set
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To store the configuration to the user defined audio profile:
To switch back and forth:
AT^SNFS=2
OK
AT^SAIC=2,1,1
OK
AT^SNFW
Stores the audio mode and the interface.
OK
AT^SNFS=4
Switches to the handset connected to analog interface 1.
OK
AT^SNFS=2
Switches to the handsfree device at analog interface 2.
OK
MC55i AT Command Set
17.16 AT^SNFTTY s
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17.16 AT^SNFTTY Signal TTY/CTM audio mode capability
MC55i offers basic support for equipment using the CTM standard (Cellular Text Telephone Modems). The ben-
efit of CTM is that text characters typed on a TTY device (Text Telephone Type-writer) can be transformed into
special audio burst signals for reliable transmission via the existing speech channels of a cellular phone system.
If CTM mode is activated, the ME will set the necessary bearer capability bit on outgoing (mobile originated) calls
and incoming calls with this bearer capability bit set are accepted. The TE needs to decode the special audio
burst signals.
If CTM mode is disabled, the ME will clear the bearer capability bit on mobile originated calls and incoming calls
with the bearer capability bit set are rejected because the MC55i expects that CTM coded speech data cannot
be decoded by the TE.
Designed to set the module's speech system into CTM mode, the AT^SNFTTY command allows a CTM device
to be connected to one of the three audio interfaces of MC55i. Traditional TTY devices that do not incorporate
CTM functionality can be connected through an external TTY-to-CTM adapter.
Related documents: Refer to the relevant standards, such as 3GPP TS 26.226 (ETSI TS 126 226) and 3GPP
TS 23.228 (ETSI TS 123 226). 3GPP documentation can be retrieved, for example, from http://www.3gpp.org/
specs/specs.htm. Application Note 22 "Using TTY/CTM equipment" supplies information needed to connect
TTY/CTM equipment to the MC55i.
Requirements for using TTY/CTM features:
• The TTY/CTM feature works with any audio mode AT^SNFS from 2 to 6. Recommended is AT^SNFS=6, with
AT^SNFI=1,32767. When the appropriate audio settings are enabled you may select either AT^SNFTTY=1
or 2.
• Depending on which audio interface the CTM device is connected to, select the appropriate settings via
AT^SAIC.
Syntax
Parameter Description
0(P) Audio path is in normal speech mode.
Test Command
AT^SNFTTY=?
Response(s)
^SNFTTY: (list of supported <audioState>s)
OK
Read Command
AT^SNFTTY?
Response(s)
^SNFTTY: <audioState>
OK
Write Command
AT^SNFTTY=<audioState>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<audioState>(num)
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1 Audio path is in TTY/CTM mode (external CTM modem).
2 Audio path is in TTY/CTM mode (internal CTM modem).
MC55i AT Command Set
17.17 AT^SNFV s
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17.17 AT^SNFV Set loudspeaker volume
AT^SNFV can be used to set the volume of the loudspeaker to the value <outCalibrate> addressed by <out-
Step>. The read and write commands refer to the active audio mode. The write command works only in audio
modes 2 to 6.
Syntax
Parameter Description
The actual volume of each step is defined by the parameter <outCalibrate>, which can be set with AT^SNFO.
0...4(P)
Notes
• Any change to <outStep> takes effect in audio modes 2 to 6. That is, when you change <outStep> and
then select another mode with AT^SNFS, the same step will be applied. Nevertheless, the actual volume can
be quite different, depending on the values of <outCalibrate> set in each mode. The only exception is
audio mode 1 which is fixed to <outStep>=4.
•<outStep> is stored non-volatile when the ME is powered down with AT^SMSO or reset with AT+CFUN=1,1.
<outStep> is not stored by AT^SNFW.
•<outStep> can also be changed by AT^SNFO (Section 17.13) and AT+CLVL (Section 17.4).
Test Command
AT^SNFV=?
Response(s)
^SNFV: (list of supported <outStep>s)
OK
Read Command
AT^SNFV?
Response(s)
^SNFV: <outStep>
OK
Write Command
AT^SNFV=<outStep>
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<outStep>(num)
MC55i AT Command Set
17.18 AT^SNFW s
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17.18 AT^SNFW Write audio setting in non-volatile store
AT^SNFW causes the TA to write the currently selected audio parameters to non-volatile store. The saved audio
profile includes the following parameters:
AT^SNFA: <atten>
AT^SNFI: <inBbcGain>, <inCalibrate>
AT^SNFO: <outBbcGain>, <outCalibrate>[0 to 4], <sideTone>
AT^SNFS: <audMode>
AT^SAIC: <io>, <mic>, <ep>.
Syntax
Test Command
AT^SNFW=?
Response(s)
OK
Exec Command
AT^SNFW
Response(s)
OK
ERROR
CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
MC55i AT Command Set
17.19 AT^SRTC s
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17.19 AT^SRTC Ring tone configuration
The AT^SRTC read command returns the current <type> and current <volume>. The read command can be
used while test playback is off or on. In the latter case, see execute command for details.
The AT^SRTC execute command is intended only for testing. It starts to play a melody from the audio output cur-
rently selected with AT^SNFS. To deactivate test playback use AT^SRTC again.
During test playback, you can enter the write command to select another melody and adjust the volume. Also,
you can enter the read command to check the type and volume of the current ring tone, and to view the status
of playback (on / off).
The AT^SRTC write command chooses the type and volume of ring tones. The selected <type> and <volume>
are stored non-volatile. The only exception is <type>=0 which is not stored because it is intended only to quickly
mute the tone currently played. So <type>=0 only stops immediately the audible ring tone, but does not termi-
nate the RING URC.
Syntax
Test Command
AT^SRTC=?
Response(s)
^SRTC:(list of supported) <type>s, (list of supported) <volume>s
OK
Read Command
AT^SRTC?
Response(s)
^SRTC: <type>, <volume>, <status>
OK
Exec Command
AT^SRTC
Response(s)
OK
Write Command
AT^SRTC=[<type>][, <volume>]
Response(s)
^SRTC: <type>, <volume>
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
MC55i AT Command Set
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Parameter Description
Type of ring tone. You have a choice of 7 different ring tones and melodies. All will be played from the audio
output selected with the AT^SNFS command. <type>=0 is only intended for muting.
0 Mutes the currently played tone immediately.
1 Sequence 1
2 Sequence 2
3(D) Sequence 3
4 Sequence 4
5 Sequence 5
6 Sequence 6
7 Sequence 7
Volume of ring tone, varies from low to high
0(D) Mute
1Very low
2 Identical with 1
3Low
4 Identical with 3
5Middle
6 Identical with 5
7 High
Status of test ringing. Indicates whether or not a melody is currently being played back for testing
0 Switched off
1 Switched on
Note
• Before first using ring tones note that the following settings apply:
We have chosen to let you decide your own preferences when you start using ring tones. Therefore, factory
setting is AT^SRTC=3,0,0 (ring tones are muted). To activate ring tones for the very first time, first enter the
write command and simply change the volume. After applying a firmware update the volume and type
selected before the firmware update will be preserved.
<type>(num)
<volume>(num)
<status>(num)
MC55i AT Command Set
18. Hardware Related Commands s
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18. Hardware Related Commands
The AT commands described in this chapter are related to the hardware interface of the MC55i. Further informa-
tion regarding this interface is available in the "MC55i Hardware Interface Description"[2].
18.1 AT+CCLK Real Time Clock
Syntax
Parameter Description
Format is "yy/mm/dd,hh:mm:ss", where the characters indicate the two last digits of the year, followed by month,
day, hour, minutes, seconds; for example 6th of July 2005, 22:10:00 hours equals to "05/07/06,22:10:00"
Factory default is "02/01/01,00:00:00"
Notes
•<time> is retained if the device enters the Power Down mode via AT^SMSO.
•<time> will be reset to its factory default if power is totally disconnected. In this case, the clock starts with
<time>= "02/01/01,00:00:00" upon next power-up.
• Each time MC55i is restarted it takes 2s to re-initialize the RTC and to update the current time. Therefore, it
is recommended to wait 2s before using the commands AT+CCLK and AT+CALA (for example 2s after
^SYSSTART has been output).
Test Command
AT+CCLK=?
Response(s)
OK
Read Command
AT+CCLK?
Response(s)
+CCLK: <time>
OK
Write Command
AT+CCLK=<time>
Response(s)
+CME ERROR: <err>
ERROR
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + + + -
<time>(str)
MC55i AT Command Set
18.2 AT+CALA s
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18.2 AT+CALA Set alarm time
The AT+CALA write command can be used to set an alarm time in the ME When the alarm time is reached and
the alarm is executed the ME returns an Unsolicited Result Code (URC) and the alarm time is reset to "00/01/
01,00:00:00".
The alarm can adopt two functions, depending on whether or not you switch the GSM engine off after setting the
alarm:
• Reminder message: You can use the alarm function to generate reminder messages. For this purpose, set
the alarm as described below and do not switch off or power down the ME. When executed the message
comes as an Unsolicited Result Code which reads "+CALA".
• Alarm mode: You can use the alarm function to restart the ME when powered down. For this purpose, set the
alarm as described below. Then power down the ME by entering the AT^SMSO command. When the alarm
time is reached, the ME will wake up to Alarm mode. To prevent the ME from unintentionally logging into the
GSM network, Alarm mode provides restricted operation. Upon wake-up, the ME indicates an Unsolicited
Result Code which reads: "+CALA". A limited number of AT commands is available during Alarm mode, for
details see Section 20.4, Availability of AT Commands Depending on Operating Mode of ME.
The ME remains deregistered from the GSM network.
If you want the ME to return to full operation (normal operating mode) it is necessary to restart the ME by
driving the ignition line (IGT pin of application interface) to ground.
If your ME is battery powered note that the battery can be charged while the ME stays in Alarm mode. For
details please refer to [2].
The AT+CALA test command returns the supported array index values <n>, the supported alarm types <type>
and the maximum length of the text <tlength> to be output.
The AT+CALA read command returns the current alarm settings in the ME.
Syntax
Test Command
AT+CALA=?
Response(s)
+CALA: (list of supported<n>s), (list of supported<type>s), (list of supported<tlength>s)
OK
ERROR
+CME ERROR: <err>
Read Command
AT+CALA?
Response(s)
+CALA: <time>[, <n>[, <type>[, <text>]]]
OK
ERROR
+CME ERROR: <err>
Write Command
AT+CALA=<time>[, <n>[, <type>[, <text>]]]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
GSM 07.07 - + + + + + + + -
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Unsolicited Result Codes
URC 1
+CALA: [<text>]
Indicates reminder message.
URC 2
^SYSSTART ALARM MODE
+CALA: <text>
Indicates ME wake-up into Alarm mode. If autobauding is active (AT+IPR=0) the line "+CALA" does not
appear, but your individual <text> message will be displayed.
Parameter Description
Format is "yy/MM/dd,hh:mm:ss". For example, 6th of July 2005, 22:10:00 equals to "05/07/06,22:10:00" (see
also AT+CCLK).
Note: If <time> equals current date and time or is set to an earlier date, TA returns +CME ERROR: 21.
Integer type value indicating the array index of the alarm.
The ME allows to set only one alarm at a time. Therefore, the list of supported alarm events indicated by the test
command AT+CALA=? is <n>=0. If a second alarm time is set, the previous alarm will be deleted. Therefore, the
read command AT+CALA? will always return <n>=0. This is also true if individual settings are made on ASC0
and ASC1 or the various Multiplexer channels, for details see notes below.
Integer type value indicating the type of the alarm.
0 Alarm indication: text message via serial interface
String type value indicating the text to be displayed when alarm time is reached; maximum length is <tlength>.
By factory default, <text> is undefined.
Note: <text> will be stored to the non-volatile flash memory when the device enters the Power Down mode via
AT^SMSO. Once saved, it will be available upon next power-up, until you overwrite it by typing another text. This
eliminates the need to enter the full string when setting a fresh alarm.
<text> should not contain characters which are coded differently in ASCII and GSM (e.g. umlauts), see also
"Supported character sets" and "GSM alphabet tables".
Integer type value indicating the maximum length of <text>. The maximum length is 16.
Notes
• After the alarm was executed the parameter <time> of AT+CALA will be reset to "00/01/01,00:00:00", but
<text> will be preserved as described above.
• If MC55i is totally disconnected from power supply the most recently saved configuration of +CALA:
<time>[,<n>[,<type>[,<text>]]] will be presented when MC55i is powered up.
• Each time MC55i is restarted with ignition it takes 2s to re-initialize the RTC and to update the current time.
Therefore, it is recommended to wait 2s before using the commands AT+CCLK and AT+CALA (for example
2s after ^SYSSTART has been output).
<time>(str)
<n>(num)
<type>(num)
<text>(str)
<tlength>(num)
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• Alarm settings on ASC0 / ASC1 and different Multiplexer channels (see AT+CMUX):
- On each interface an individual <text> message can be stored, but only one time setting applies. This
means an alarm <time> set on one of the interfaces overwrites the time setting on all remaining inter-
faces. Therefore, the total number of alarm events returned by the read command AT+CALA? will always
be <n>=0, no matter whether different text messages are stored.
- When the scheduled alarm occurs, the ME sends the URC only on the interface where the most recent
alarm setting was made. The alarm time will be reset to "00/01/01,00:00:00" on all interfaces.
Examples
EXAMPLE 1
You may want to configure a reminder message for July 31, 2005, at 9.30h, including the message "Good
Morning".
Do not switch off the GSM engine.When the alarm occurs the ME returns the following URC:
EXAMPLE 2
To set a fresh alarm using the same message as in Example 1, simply enter date and time. <n>, <type>,
<text>, <tlength> can be omitted:
When the alarm is executed the URC comes with the same message:
EXAMPLE 3
To enable the ME to wake up into Alarm mode, e.g. on July 20, 2005, at 8.30h, enter
Next, power down the ME:
When the alarm is executed the ME wakes up to Alarm mode and displays a URC. If available, this line is
followed by the individual <text> most recently saved. If no individual message was saved only the first line
appears.
AT+CALA="05/07/31,09:30:00",0,0,"Good Morning"
OK
+CALA: Good Morning
AT+CALA="05/07/31,08:50:00"
OK
+CALA: Good Morning
AT+CALA="05/07/20,08:30:00"
OK
AT^SMSO
^SMSO: MS OFF
OK
^SHUTDOWN
"
+CALA
"
+CALA: Good Morning
MC55i AT Command Set
18.3 AT^SBC s
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18.3 AT^SBC Battery Charge Control
The functions of the AT^SBC differ depending on whether or not a battery is present.
• General functions:
The AT^SBC write command enables the presentation of URCs alerting the user of undervoltage conditions
before the module switches off. The automatic shutdown caused by undervoltage is equivalent to the power-
down initiated with the AT^SMSO command, i.e. ME logs off from the network and the software enters a secure
state avoiding loss of data. When the module is in IDLE mode it takes typically one minute to deregister from
the network and to switch off. For further details regarding automatic shutdown and voltage ratings please
refer to the Hardware Interface Description [2].
The AT^SBC read command displays the average current consumption of the module and, if specified, of the
external application.
• Functions available with battery connected:
The AT^SBC read command can be used to query the status of the battery and the charger.
The AT^SBC write command is important for entering the current consumption of the external application via
<current>. It should be noted that the charge control supported by MC55i works only if the requirements
described in the Hardware Interface Description [2] are met (battery type Lithium-Ion or Lithium Polymer,
presence of an NTC and protection circuit etc.) and if <current> is correctly specified. If the battery does
not incorporate an NTC, or the battery and the NTC are not compliant with the specified requirements the
battery cannot be detected by MC55i.
Syntax
Unsolicited Result Code
Test Command
AT^SBC=?
Response(s)
^SBC:(list of supported <bcs>s), (list of supported <bcl>s), (list of supported <mpc>s)
OK
Read Command
AT^SBC?
Response(s)
^SBC: <bcs>, <bcl>, <mpc>
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SBC=<current>
Response(s)
OK
ERROR
+CME ERROR: <err>
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + ± + -
MC55i AT Command Set
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^SBC: Undervoltage
The message will be reported, for example, when the user attempts to set up a call while the voltage is close to
the critical limit and further power loss is caused during the transmit burst. When the external charging circuit
includes an NTC connected to the BATT_TEMP pin, the URC appears several times before the module switches
off.
The undervoltage protection is also efficient in applications which are not battery operated, i.e. where no NTC is
connected to the BATT_TEMP pin. To use this feature it is sufficient to issue the write command which automat-
ically enables the presentation of URCs. You do not need to specify <current>. Please note, that in contrast
to applications with an NTC, MC55i will present the undervoltage URC only once and will then switch off without
sending any further messages.
Parameter Description
Connection status of battery pack
0 No charging adapter is connected
1 Charging adapter is connected
2 Charging adapter is connected, charging in progress
3 Charging adapter is connected, charging has finished
4 Charging error, charging is interrupted
5 False charging temperature, charging is interrupted while temperature is
beyond allowed range
Battery capacity
0, 20, 40, 60, 80, 100 percent of remaining capacity (6 steps).
"0" indicates that either the battery is exhausted or the capacity value is not available. "100" indicates a remain-
ing capacity between 81 and 100 percent, "80" indicates 61 ... 81 percent, and so on.
While charging is in progress (charging adapter connected) the battery capacity is not available. Consequently,
parameter <bcl>=0. To query the battery capacity disconnect the charger.
Average current consumption.
Value (0...5000) of average current consumption (mean value over a couple of seconds) in mA.
<mpc> is obtained from the MC55i's current consumption, plus the value you have specified for the application
by using the write command AT^SBC=<current>. Remember that the current consumption of MC55i varies
with its operating mode (IDLE, TALK, DATA, GPRS/DATA) and the power level.
If <current> was not yet specified and no battery pack NTC is detected <mpc> returns only the module's
present current consumption.
If <current> was not yet specified, but the NTC of the connected battery pack is detected, an offset value of
200mA will be added by default. 200mA represents the assumed current consumption of a typical external appli-
cation connected to the MC55i. It is recommended that you enter the correct power consumption of your appli-
cation as described below.
0(P)...5000 Enter the current consumption of your host application in mA. This information
enables MC55i to correctly determine the end of charging and terminate charg-
ing automatically when the battery is fully charged. If used, the current drawn
from the VDD pin of the module's application interface must be added, too.
When the MC55i is powered down or reset, the value of <current> is
restored to its default. This affects the charging control and disables the pre-
sentation of Unsolicited Result Codes. Therefore, the parameter should be set
every time when needed after rebooting the MC55i.
<bcs>(num)
<bcl>(num)
<mpc>(num)
<current>(num)
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Notes
• If multiplex mode (AT+CMUX) is active, any virtual channel can be used for entering the read or write com-
mand. The undervoltage URC will be issued simultaneously on all three channels.
• The URC "^SYSSTART CHARGE ONLY MODE" is indicated automatically when the module enters this mode
(except when autobauding is active). Unlike the undervoltage URC, it cannot be disabled or enabled by the
TE.
18.3.1 Responses returned by read command
Responses returned by the AT^SBC read command vary with the operating mode of the MC55i:
• Normal mode: MC55i is switched on by Ignition pin and running in SLEEP, IDLE, TALK or DATA mode.
Charger is not connected. The AT^SBC read command indicates the battery capacity and the current con-
sumption of the MC55i module and the application (if value of application was specified before as <cur-
rent>).
• Normal mode + charging: Allows charging while MC55i is switched on by Ignition pin and running in SLEEP,
IDLE, TALK or DATA mode. The AT^SBC read command returns only charger status and current consump-
tion of the MC55i module and the application. Percentage of battery capacity is not available.
• CHARGE ONLY mode: Allows charging while MC55i is detached from GSM network. When started, the mode
is indicated by the URC "^SYSSTART CHARGE ONLY MODE". The AT^SBC read command returns only the
charger status and current consumption of the MC55i module and the application. Percentage of battery
capacity is not available. In CHARGE ONLY mode a limited number of AT commands is accessible (see
Appendix). There are several ways to activate the CHARGE ONLY mode:
- from POWER DOWN mode: Connect charger while the MC55i was powered down with AT^SMSO
- from Normal mode: Connect charger, then enter AT^SMSO.
• Alarm mode: The battery can be charged while the MC55i stays in Alarm mode, but the AT^SBC read com-
mand returns only charger status and current consumption of the MC55i module and the application. Percent-
age of battery capacity is not available.
MC55i AT Command Set
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18.4 AT^SBV Battery/Supply Voltage
The AT^SBV execute command allows to monitor the supply (or battery) voltage of the module. The voltage is
continuously measured at intervals depending on the operating mode of the RF interface. The duration of a mea-
surement period ranges from 0.5s in TALK / DATA mode up to 50s when MC55i is in IDLE mode or Limited Ser-
vice (deregistered). The displayed value is averaged over the last measuring period before the AT^SBV
command was executed.
The measurement is related to the test points of BATT+ and GND, both accessible on the bottom of the module.
Refer to [1] for information on the module's test points.
Syntax
Parameter Description
Supply (or battery) voltage in mV
Test Command
AT^SBV=?
Response(s)
OK
ERROR
+CME ERROR:
Exec Command
AT^SBV
Response(s)
^SBV: <value>
OK
ERROR
+CME ERROR:
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + + + -
<value>(num)
MC55i AT Command Set
18.5 AT^SCTM s
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18.5 AT^SCTM Set critical operating temperature presentation mode
or query temperature
Use this command to monitor the temperature range of the module and the battery. The write command enables
or disables the presentation of URCs to report critical temperature limits.
CAUTION: During a guard period of two minutes after power-up, the module will not switch off, even if the critical
temperature limit is exceeded. This allows the user to issue emergency calls before the module switches off.
During this guard period, the module operates in an automatic report mode: URCs can be always displayed
regardless of the selected mode <n>. Refer to Section 18.5.1, Deferred shutdown for detail.
Syntax
Unsolicited Result Codes
URC 1
URCs will be automatically sent to the TA when the temperature reaches or exceeds the critical level, or when
it is back to normal.
^SCTM_A: <m>
for battery temperature
URC 2
^SCTM_B: <m>
for module (board) temperature
Test Command
AT^SCTM=?
Response(s)
^SCTM:(list of supported <n>s)[, (list of supported <p>s)]
OK
Read Command
AT^SCTM?
Response(s)
^SCTM: <n>, <m>[, <temp>]
OK
ERROR
+CME ERROR
Write Command
AT^SCTM=<n>[, <p>]
Response(s)
OK
ERROR
+CME ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + + + -
MC55i AT Command Set
18.5 AT^SCTM s
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Command Description
The read command returns:
• the URC presentation mode
• information about the current temperature range of the module
• The board temperature in Celsius if parameter <p>=1.
Please note that the Read command does not indicate the temperature range of the battery. The battery temper-
ature can only be reported by an Unsolicited Result Code.
Select <n> to enable or disable the presentation of the URCs. Please note that the setting will not be stored upon
Power Down, i.e. after restart or reset, the default <n>=0 will be restored. To benefit from the URCs <n>=1 needs
to be selected every time you reboot the GSM engine.
Parameter Description
0(&F)(P) Presentation of URCs is disabled (except for <m> equal to -2 or +2).
1 Presentation of URCs is enabled.
-2 Below lowest temperature limit (causes immediate switch-off)
-1 Below low temperature alert limit
0 Normal operating temperature
1 Above upper temperature alert limit
2 Above uppermost temperature limit (causes immediate switch-off)
0(&F)(P) Suppress output of <temp> in read command.
1 Output <temp> in read command.
Board temperature in Celsius. Is comprised between the lowest temperature warning level and the uppermost
temperature warning level.
Notes
• Please refer to the "Hardware Interface Description" for specifications on critical temperature ranges.
• To avoid damage the module will shut down once the critical temperature is exceeded.
The procedure is equivalent to the power-down initiated with AT^SMSO.
• URCs indicating the alert level "1" or "-1" are intended to enable the user to take appropriate precautions,
such as protect the module and the battery from exposure to extreme conditions, or save or back up data etc.
The presentation of "1" or "-1" URCs depends on the settings selected with the write command:
If <n>=0: Presentation is enabled during the two minute guard period after the module was switched on. After
expiry of the two minute guard period, the presentation will be disabled, i.e. no URCs with alert levels "1" or
''-1" will be generated.
If <n>= 1: Presentation of "1" or "-1" URCs is always enabled.
• Level "2" or "-2" URCs are followed by immediate shutdown, except in cases described in Section 18.5.1,
Deferred shutdown. The presentation of these URCs is always enabled, i.e. they will be output even though
the factory setting AT^SCTM=0 was never changed.
<n>(num)
<m>(num)
<p>(num)
<temp>(num)
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18.5 AT^SCTM s
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Examples
EXAMPLE 1
URCs issued when the operating temperature is out of range:
EXAMPLE 2
URCs issued when the temperature is back to normal (URC is output once):
18.5.1 Deferred shutdown
In the following cases, automatic shutdown will be deferred if a critical temperature limit is exceeded:
• while an emergency call is in progress
• during a two minute guard period after powerup. This guard period has been introduced in order to allow for
the user to make an emergency call. The start of any one of these calls extends the guard period until the end
of the call. Any other network activity may be terminated by shutdown upon expiry of the guard time.
While in a "deferred shutdown" situation, the engine continues to measure the temperature and to deliver alert
messages, but deactivates the shutdown functionality. Once the guard period is expired or the call is terminated,
full temperature control will be resumed. If the temperature is still out of range, ME switches off immediately (with-
out another alert message).
CAUTION! Automatic shutdown is a safety feature intended to prevent damage to the module. Extended usage
of the deferred shutdown facilities provided may result in damage to the module, and possibly other severe con-
sequences.
^SCTM_A: 1
Caution: Battery close to overtemperature limit.
^SCTM_A: 2
Alert: Battery above overtemperature limit. Engine switches off.
^SCTM_B: 1
Caution: Module close to overtemperature limit.
^SCTM_B: 2
Alert: Module is above overtemperature limit and switches off.
^SCTM_A: -1
Caution: Battery close to undertemperature limit.
^SCTM_A: -2
Alert: Battery below undertemperature limit. Engine switches off.
^SCTM_B: -1
Caution: Module close to undertemperature limit.
^SCTM_B: -2
Alert: Module is below undertemperature limit and switches off.
^SCTM_A: 0
Battery temperature back to normal temperature.
^SCTM_B: 0
Module back to normal temperature.
MC55i AT Command Set
18.6 AT^SSYNC s
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18.6 AT^SSYNC Configure SYNC Pin
The AT^SSYNC command serves to configure the SYNC pin of the application interface. Please note that the
SYNC pin may be assigned different functions: Depending on the design of the host application, the pin can
either be used to indicate the current consumption in a transmit burst or to drive a status LED connected to the
pin as specified in [2]. For detailed information on the SYNC pin and its LED functionality refer to [2]. Before
changing the mode of the SYNC pin, carefully read the technical specifications.
Syntax
Parameter Description
Operation mode of the SYNC pin. Setting is stored non-volatile.
0(D) SYNC mode:
Enables the SYNC pin to indicate growing power consumption during a trans-
mit burst. You can make use of the signal generated by the SYNC pin, if power
consumption is your concern. To do so, ensure that your application is capable
of processing the signal. Your platform design must be such that the incoming
signal causes other components to draw less current. In short, this allows your
application to accommodate current drain and thus, supply sufficient current to
the GSM engine if required.
1LED mode:
Enables the SYNC pin to drive a status LED installed in your application
according to the specifications provided in [2].
The coding of the LED is described in Section 18.6.1, ME status indicated by
status LED patterns.
Test Command
AT^SSYNC=?
Response(s)
^SSYNC:list of supported <mode>s
OK
Read Command
AT^SSYNC?
Response(s)
^SSYNC:<mode>
OK
Write Command
AT^SSYNC=<mode>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
SIEMENS - + + + + + - - -
<mode>(num)
MC55i AT Command Set
18.6 AT^SSYNC s
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18.6.1 ME status indicated by status LED patterns
The following table lists the possible patterns of status LED behavior, and describes the ME operating status indi-
cated by each pattern if AT^SSYNC parameter <mode>=1.
During the transition from one LED pattern to another the "on" and/or "off" periods of the LED may vary in length.
This is because an event that triggers the change may occur any time and, thus, truncate the current LED pattern
at any point.
Table 18.1: Modes of the LED and indicated ME functions
1) When a temporary wake-up event (for example a call, a URC, a packet switched transfer) occurs in CYCLIC SLEEP mode
the LED flashes according to the patterns listed above. See Section 2.8.1, Wake up the ME from SLEEP mode for details
on the various SLEEP modes and wake-up events.
LED behavior ME operating status if AT^SSYNC=1
Permanently off ME is in one of the following modes:
- POWER DOWN mode
- ALARM mode
- CHARGE ONLY mode
- NON-CYCLIC SLEEP mode
- CYCLIC SLEEP mode with no temporary wake-up event in progress 1)
600 ms on / 600ms off Limited Network Service: No SIM card inserted or no PIN entered, or network
search in progress, or ongoing user authentication, or network login in progress.
75 ms on / 3 s off IDLE mode: The mobile is registered to the GSM network (monitoring control chan-
nels and user interactions). No call is in progress.
75 ms on / 75 ms off /
75 ms on / 3 s off
One or more GPRS PDP contexts activated.
500 ms on / 25 ms off Packet switched data transfer is in progress.
Permanently on Depending on type of call:
Voice call: Connected to remote party.
Data call: Connected to remote party or exchange of parameters while setting up
or disconnecting a call.
MC55i AT Command Set
19. Miscellaneous Commands s
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19. Miscellaneous Commands
The AT Commands described in this chapter are related to various areas.
19.1 A/ Repeat previous command line
Syntax
Command Description
Repeat previous command line.
Notes
• Line does not need to end with terminating character.
• After beginning with the character "a" or "A" a second character "t", "T" or "/" has to follow. In case of using a
wrong second character, it is necessary to start again with character "a" or "A".
• If autobauding is active, the command A/ cannot be used (see AT+IPR).
Exec Command
A/
Response(s)
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
MC55i AT Command Set
19.2 ATS3 s
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19.2 ATS3 Set command line termination character
The ATS3 command determines the character recognized by the TA to terminate an incoming command line. It
is also generated for result codes and information text, along with the ATS4 parameter.
Syntax
Parameter Description
command line termination character
000...13(&F)...127
Notes
• Using a value other than the default 13 may cause problems when entering commands.
• Whenever you change the setting take into account that the new value has no effect on the URC "^SHUT-
DOWN".
Read Command
ATS3?
Response(s)
<n>
OK
Write Command
ATS3=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
19.3 ATS4 s
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19.3 ATS4 Set response formatting character
The ATS4 command determines the character generated by the TA for result code and information text, along
with the ATS3 parameter .
Syntax
Parameter Description
response formatting character
000...10(&F)...127
Note
• Whenever you change the setting take into account that the new value has no effect on the URC "^SHUT-
DOWN".
Read Command
ATS4?
Response(s)
<n>
OK
Write Command
ATS4=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
19.4 ATS5 s
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19.4 ATS5 Write command line editing character
Syntax
Command Description
This parameter setting determines the character recognized by TA as a request to delete the immediately pre-
ceding character from the command line.
Parameter Description
command line editing character
000...8(&F)...127
Read Command
ATS5?
Response(s)
<n>
OK
Write Command
ATS5=<n>
Response(s)
OK
ERROR
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge Last
V.250 - + + + + + - - -
<n>(num)(&W)(&V)
MC55i AT Command Set
20. Appendix s
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20. Appendix
20.1 Restricted access to SIM data after SIM PIN authentication
The following commands can be used only after data from the SIM have been read successfully for the first time.
Reading starts after successful SIM authentication has been performed, and may take up to 30 seconds depend-
ing on the SIM used. While the read process is in progress, an attempt to use any of the following commands
will result in "+CME Error: 14" (SIM busy).
ø ... AT Command not available
- ... AT command accessible immediately after PIN entry has returned OK
+ ... AT command fully accessible after SIM PIN authentication has been completed
AT Command Exec Test Read Write
AT+CMGL + - ø+
AT^SMGL + - ø+
AT+CMGR ø-ø+
AT^SMGR ø-ø+
AT+CSCA ø- + -
AT^SSTGI ø+++
AT^SSTR ø+++
AT+CPBR ø+ø+
AT+CPBW ø+ø+
AT+CPBS ø+++
AT^SDLD ++ø ø
AT^SPBC ø+ø+
AT^SPBD ø+ø+
AT^SPBG ø+ø+
AT^SPBS ø+ø+
ATD><mem><n> +øøø
MC55i AT Command Set
20.2 Star-Hash (*#) Network Commands s
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20.2 Star-Hash (*#) Network Commands
The following command strings can be sent to the network via ATD and have to be terminated with a semicolon.
The command strings are defined with GSM 2.30 [16].
Table 20.1: Star-Hash (*#) Command Overview
Star-Hash Code Functionality Response, also refer to Table 20.3
Phone Security
*#06# Query IMEI <IMEI> OK
**04[2]*oldPin[2]*newPin[2]*new-
Pin[2]#
Change SIM pwd +CME ERROR: <err> / OK
**05[2]*unblKey[2]*newPin[2]*new-
Pin[2]#
Change/Unblocking SIM pwd +CME ERROR: <err> / OK
*#0003*MasterPhoneCode# Unlock ''PS'' lock with Master
Phone Code
+CME ERROR: <err> / OK
*[*]03*[ZZ]*oldPw*newPw*newPw# Registration of net password +CME ERROR: <err> / OK
Phone number presentation
*#30# Check status of CLIP (Calling Line
Identification Presentation)
+CLIP : <n>,<m> OK (see
AT+CLIP)
*#31# Check status of CLIR (Calling Line
Identification Restriction)
+CLIR : <n>,<m> OK (see
AT+CLIR)
*31#<Phonenumber>[;] Suppress CLIR (see AT+CLIR)
#31#<Phonenumber>[;] Activate CLIR (see AT+CLIR)
*#76# Check status of COLP (Connected
Line Identification Presentation)
+COLP : <n>,<m> OK (see:
AT+COLP)
*#77# Check status of COLR (Connected
Line Identification Restriction)
+COLR : 0,<m> OK (where <m> =
active or not active)
Call forwarding
(choice of *,#,*#,**,##)21*DN*BS# Act/deact/int/reg/eras CFU ^SCCFC : <reason>, <status>,
<class> [,...] like +CCFC *) (see:
AT+CCFC)
(choice of *,#,*#,**,##)67*DN*BS# Act/deact/int/reg/eras CF busy see above
(choice of
*,#,*#,**,##)61*DN*BS*T#
Act/deact/int/reg/eras CF no reply see above
(choice of *,#,*#,**,##)62*DN*BS# Act/deact/int/reg/eras CF no reach see above
(choice of
*,#,*#,**,##)002*DN*BS*T#
Act/deact/int/reg/eras CF all see above
(choice of
*,#,*#,**,##)004*DN*BS*T#
Act/deact/int/reg/eras CF all cond. see above
Call waiting
(choice of *,#,*#)43*BS# Activation/deactivation/int WAIT +CCWA : <status>, <class> [,...]
like +CCWA *) (see: AT+CCWA)
MC55i AT Command Set
20.2 Star-Hash (*#) Network Commands s
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*) Notes on ^SCCFC, +CCWA, ^SCLCK: The output depends on the affected basic service of the Star-Hash code. One line
will be output for every tele- or bearer service coded in basic service code BS.
^SCCFC and ^SCLCK are modified by giving an additional <reason> or <fac> in front of the regular output string gener-
ated by the standard commands +CCFC and +CLCK.
Table 20.2: Abbreviations of Codes and Parameters used in Table 20.1
Call barring
(choice of *,#,*#)33*Pw*BS# Act/deact/int BAOC ^SCLCK : <fac>, <status>, <class>
[, ...] like +CLCK *) (Refer to
AT+CLCK)
(choice of *,#,*#)331*Pw*BS# Act/deact/int BAOIC see above
(choice of *,#,*#)332*Pw*BS# Act/deact/int BAOIC exc.home see above
(choice of *,#,*#)35*Pw*BS# Act/deact/int. BAIC see above
(choice of *,#,*#)351*Pw*BS# Act/deact/int BAIC roaming see above
#330*Pw*BS# Deact. All Barring Services see above
#333*Pw*BS# Deact. All Outg.Barring Services see above
#353*Pw*BS# Deact. All Inc.Barring Services see above
Call Hold / Multiparty
C[C] in call Call hold and multiparty +CME ERROR: <err> / OK
USSD messages
[C]...[C]# Send USSD message +CME ERROR: <err> / OK
C[C] (excluded 1[C]) Send USSD message +CME ERROR: <err> / OK
Abbreviation Meaning Value
ZZ Type of supplementary services:
Barring services
All services
330
Not specified
DN Dialing number String of digits 0-9
BS Basic service equivalent to parameter class:
Voice
FAX
SMS
SMS+FAX
Data circuit asynchron
Data circuit synchron
dedicated PAD access
dedicated Packet access
Data circuit asynchron+PAD
Data circuit synchron+Packet
Data circuit asynchron+synchron+Packet+PAD
All Services
11
13
16
12
25
24
27
26
21
22
20
--
TTime in seconds In contrast to AT+CCFC, parameter
T has no default value. If T is not
specified, an operator defined
default or the last known value may
be used, depending on the network
operator.
Star-Hash Code Functionality Response, also refer to Table 20.3
MC55i AT Command Set
20.2 Star-Hash (*#) Network Commands s
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Table 20.3: Star-Hash Command Response Parameters
For exact specification of format and parameters for Star-Hash commands refer to GSM 02.04, Table 3.2 [15]
and GSM 02.30, Annex C [16].
Table 20.4: Star-Hash Commands for Supplementary Services
PW Password --
CCharacter of TE character set (e.g. asterics, hash
or digit in case of USSD, or digits in case of held
calls or multiparty calls)
--
Parameter Meaning
<m> Mode: 0 = not active, 1 = active
<n> Unsolicited result code: 0 = presentation disabled, 1 = presentation enabled
<status> Status: 0 = not active, 1 = active
<class> Represents BS = basic service, refer to AT+CCFC, AT+CLCK
<fac> Facility lock, refer to AT+CLCK
<reason> Call forwarding reason
Star-Hash Code Abbreviations in Table 20.1 Functionality
* act Activate (except for CLIR, see list above)
** reg Register and activate
*# int Check status (interrogate)
# deact Deactivate (except for CLIR, see list above)
## eras Unregister and deactivate
Abbreviation Meaning Value
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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20.3 Available AT Commands and Dependency on SIM PIN
ø ... Command not available
- ... Command does not require PIN1
+ ... Command requires PIN1
± ... Command sometimes requires PIN1
Table 20.5: Available AT Commands and Dependency on SIM PIN
AT Command Exec Test Read Write
Configuration Commands
AT&F -øøø
AT&V -øøø
AT&W -øøø
ATQ -øøø
ATV -øøø
ATX -øøø
ATZ -øøø
AT+CFUN ø- - -
AT^SMSO - - ø ø
AT+GCAP - - ø ø
AT+CMEE ø- - -
AT+CSCS ø- - -
AT^SCFG ø- - -
AT^SM20 ø- - -
Status Control Commands
AT+CMER ø+++
AT+CIND ø- - -
AT^SIND ø- - -
AT+CEER + + ø ø
ATS18 ø ø - -
AT+CPAS - - ø ø
AT+WS46 ø- - -
Serial Interface Control Commands
AT\Q -øøø
AT&C -øøø
AT&D -øøø
AT&S -øøø
ATE -øøø
AT+ILRR ø+++
AT+IPR ø- - -
AT+CMUX ø- - -
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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Security Commands
AT+CPIN ø- - -
AT+CPIN2 ø+++
AT^SPIC - - - -
AT+CLCK ø+ø+
AT^SLCK ø+ø+
AT+CPWD ø+ø+
AT^SPWD ø+ø+
Identification Commands
ATI -øøø
AT+CGMI - - ø ø
AT+GMI - - ø ø
AT+CGMM - - ø ø
AT+GMM - - ø ø
AT+CGMR - - ø ø
AT+GMR - - ø ø
AT+CGSN - - ø ø
AT+GSN - - ø ø
AT+CIMI + + ø ø
Call related Commands
ATA +øøø
ATD ±øøø
ATD><mem><n> +øøø
ATD><n> +øøø
ATD><str> +øøø
ATDI +øøø
ATDL +øøø
ATH -øøø
AT+CHUP + + ø ø
ATS0 ø ø - +
ATS6 ø ø - -
ATS7 ø ø - -
ATS8 ø ø - -
ATS10 ø ø - -
ATO -øøø
+++ -øøø
AT+CBST ø- - -
AT+CRLP ø- - -
AT+CLCC + + ø ø
AT^SLCC ++++
AT Command Exec Test Read Write
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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AT+CR ø+++
AT+CRC ø- - -
AT+CSNS ø- - -
AT^SCNI + + ø ø
AT^SLCD + + ø ø
AT^STCD + + ø ø
ATP -øøø
ATT -øøø
ATS2 ø ø - -
Network Service Commands
AT+COPN + + ø ø
AT+COPS ø- ± ±
AT^SOPS ø+ø ø
AT+CREG ø- - -
AT+CSQ - - ø ø
AT^SMONC + + ø ø
AT^SMOND + + ø ø
AT^MONI - - ø-
AT^MONP - - ø-
AT^SMONG + + ø+
AT^SALS ø+++
AT^SHOM + + ø ø
AT^SPLM + + ø ø
AT+CPOL ø+++
AT^SPLR ø+ø+
AT^SPLW ø+ø+
Supplementary Service Commands
AT+CACM ø+++
AT^SACM + + ø+
AT+CAMM ø+++
AT+CAOC ++++
AT+CCUG ø+++
AT+CCFC ø+ø+
AT+CCWA ø+++
AT+CHLD ø+ø+
AT+CLIP ø- + -
AT+CLIR ø+++
AT+COLP ø+++
AT+CPUC ø+++
AT+CSSN ø- - -
AT Command Exec Test Read Write
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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AT+CUSD ø+++
Internet Service Commands
AT^SICS ø- - -
AT^SICI ø- - -
AT^SISS ø- - -
AT^SISI ø- - -
AT^SISO ø- - +
AT^SISC ø-ø+
AT^SISR ø-ø+
AT^SISW ø-ø+
AT^SISE ø-ø-
GPRS Commands
AT+CGACT ø+++
AT+CGANS ø+ø+
AT+CGATT ø+++
AT+CGAUTO ø+++
AT+CGEREP ø+++
AT+CGDATA ø+ø+
AT+CGDCONT ø+++
AT+CGPADDR ø+ø+
AT+CGQMIN ø+++
AT+CGQREQ ø+++
AT+CGREG ø+++
AT+CGSMS ø+++
AT^SGAUTH ø- - -
AT^SGCONF ø- - -
ATA +øøø
ATD*99# +øøø
ATD*98# +øøø
ATH +øøø
ATS0 ø ø - +
FAX Commands
AT+FBADLIN ø ø - -
AT+FBADMUL ø ø - -
AT+FBOR ø- - -
AT+FCIG ø- - -
AT+FCLASS ø- - -
AT+FCQ ø- - -
AT+FCR øøø -
AT+FDCC ø- - -
AT Command Exec Test Read Write
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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AT+FDFFC ø- - -
AT+FDIS ø- - -
AT+FDR -øøø
AT+FDT -ø ø -
AT+FET øøø -
AT+FK -øøø
AT+FLID ø- - -
AT+FMDL ø ø -ø
AT+FMFR ø ø -ø
AT+FOPT øøø -
AT+FPHCTO ø ø - -
AT+FREV ø ø -ø
AT+FRH ø-ø-
AT+FRM ø-ø-
AT+FRS øøø -
AT+FTH ø-ø-
AT+FTM ø-ø-
AT+FTS øøø -
AT+FVRFC ø- - -
Short Message Service (SMS) Commands
AT+CMGC ø+ø+
AT+CMGD ø+ø+
AT+CMGF ø- - -
AT+CMGL + + ø+
AT+CMGR ø+ø+
AT+CMGS ø+ø+
AT+CMGW + + ø+
AT+CMSS ø+ø+
AT+CNMA + + ø+
AT+CNMI ø+++
AT+CPMS ø+++
AT+CSCA ø+++
AT+CSCB ø+++
AT+CSDH ø+++
AT+CSMP ø+++
AT+CSMS ø+++
AT^SLMS + + ø ø
AT^SMGL + + ø+
AT^SMGO ø+++
AT^SMGR ø+ø+
AT^SSCONF ø- - -
AT Command Exec Test Read Write
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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AT^SSDA ø- - -
AT^SSMSS ø- - -
SIM related Commands
AT+CRSM ø+ø+
AT^SXSM ø+ø+
AT^SCKS ø- - -
AT^SCID - - ø ø
AT+CXXCID - - ø ø
SIM Application Toolkit (SAT) Commands
AT^SSTA ø- - -
^SSTN øøøø
AT^SSTGI ø- - -
AT^SSTR ø- - -
Phonebook Commands
AT+CPBR ø+ø+
AT+CPBS ø+++
AT+CPBW ø+ø+
AT^SPBC ø+ø+
AT^SPBD ø+ø+
AT^SPBG ø+ø+
AT^SPBS ø+ø+
AT+CNUM + + ø ø
AT^SDLD + + ø ø
Audio Commands
ATL -øøø
ATM -øøø
AT+CLVL ø- - -
AT+CMUT ø- - -
AT+VTD ø- - -
AT+VTS ø-ø-
AT^SAIC ø- - -
AT^SNFA ø- - -
AT^SNFD - - ø ø
AT^SNFI ø- - -
AT^SNFM ø- - -
AT^SNFO ø- - -
AT^SNFPT ø- - -
AT^SNFS ø- - -
AT^SNFTTY ø- - -
AT Command Exec Test Read Write
MC55i AT Command Set
20.3 Available AT Commands and Dependency on SIM PIN s
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AT^SNFV ø- - -
AT^SNFW - - ø ø
AT^SRTC - - - -
Hardware Related Commands
AT+CCLK ø- - -
AT+CALA ø- - -
AT^SBC ø- - -
AT^SBV - - ø ø
AT^SCTM ø- - -
AT^SSYNC ø- - -
Miscellaneous Commands
A/ -øøø
ATS3 ø ø - -
ATS4 ø ø - -
ATS5 ø ø - -
AT Command Exec Test Read Write
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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20.4 Availability of AT Commands Depending on Operating Mode of ME
- ... AT command not supported
+ ... AT command supported
Table 20.6: Availability of AT Commands Depending on Operating Mode of ME
AT Command Normal Mode Charge
Configuration Commands
AT&F + - -
AT&V + - -
AT&W + - -
ATQ + - -
ATV + - -
ATX + - -
ATZ + - -
AT+CFUN + - -
AT^SMSO +++
AT+GCAP + - -
AT+CMEE + - -
AT+CSCS + - -
AT^SCFG + - -
AT^SM20 + - -
Status Control Commands
AT+CMER + - -
AT+CIND + - -
AT^SIND + - -
AT+CEER + - -
ATS18 + - -
AT+CPAS + - -
AT+WS46 + - -
Serial Interface Control Commands
AT\Q + - -
AT&C + - -
AT&D + - -
AT&S + - -
ATE + - -
AT+ILRR + - -
AT+IPR + - -
AT+CMUX + - -
Security Commands
AT+CPIN + - -
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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AT+CPIN2 + - -
AT^SPIC + - -
AT+CLCK + - -
AT^SLCK + - -
AT+CPWD + - -
AT^SPWD + - -
Identification Commands
ATI + - -
AT+CGMI + - -
AT+GMI + - -
AT+CGMM + - -
AT+GMM + - -
AT+CGMR + - -
AT+GMR + - -
AT+CGSN + - -
AT+GSN + - -
AT+CIMI + - -
Call related Commands
ATA + - -
ATD + - -
ATD><mem><n> + - -
ATD><n> + - -
ATD><str> + - -
ATDI + - -
ATDL + - -
ATH + - -
AT+CHUP + - -
ATS0 + - -
ATS6 + - -
ATS7 + - -
ATS8 + - -
ATS10 + - -
ATO + - -
+++ + - -
AT+CBST + - -
AT+CRLP + - -
AT+CLCC + - -
AT^SLCC + - -
AT+CR + - -
AT+CRC + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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AT+CSNS + - -
AT^SCNI + - -
AT^SLCD + - -
AT^STCD + - -
ATP + - -
ATT + - -
ATS2 + - -
Network Service Commands
AT+COPN + - -
AT+COPS + - -
AT^SOPS + - -
AT+CREG + - -
AT+CSQ + - -
AT^SMONC + - -
AT^SMOND + - -
AT^MONI + - -
AT^MONP + - -
AT^SMONG + - -
AT^SALS + - -
AT^SHOM + - -
AT^SPLM + - -
AT+CPOL + - -
AT^SPLR + - -
AT^SPLW + - -
Supplementary Service Commands
AT+CACM + - -
AT^SACM + - -
AT+CAMM + - -
AT+CAOC + - -
AT+CCUG + - -
AT+CCFC + - -
AT+CCWA + - -
AT+CHLD + - -
AT+CLIP + - -
AT+CLIR + - -
AT+COLP + - -
AT+CPUC + - -
AT+CSSN + - -
AT+CUSD + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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Internet Service Commands
AT^SICS + - -
AT^SICI + - -
AT^SISS + - -
AT^SISI + - -
AT^SISO + - -
AT^SISC + - -
AT^SISR + - -
AT^SISW + - -
AT^SISE + - -
GPRS Commands
AT+CGACT + - -
AT+CGANS + - -
AT+CGATT + - -
AT+CGAUTO + - -
AT+CGEREP + - -
AT+CGDATA + - -
AT+CGDCONT + - -
AT+CGPADDR + - -
AT+CGQMIN + - -
AT+CGQREQ + - -
AT+CGREG + - -
AT+CGSMS + - -
AT^SGAUTH + - -
AT^SGCONF + - -
ATA + - -
ATD*99# + - -
ATD*98# + - -
ATH + - -
ATS0 + - -
FAX Commands
AT+FBADLIN + - -
AT+FBADMUL + - -
AT+FBOR + - -
AT+FCIG + - -
AT+FCLASS + - -
AT+FCQ + - -
AT+FCR + - -
AT+FDCC + - -
AT+FDFFC + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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AT+FDIS + - -
AT+FDR + - -
AT+FDT + - -
AT+FET + - -
AT+FK + - -
AT+FLID + - -
AT+FMDL + - -
AT+FMFR + - -
AT+FOPT + - -
AT+FPHCTO + - -
AT+FREV + - -
AT+FRH + - -
AT+FRM + - -
AT+FRS + - -
AT+FTH + - -
AT+FTM + - -
AT+FTS + - -
AT+FVRFC + - -
Short Message Service (SMS) Commands
AT+CMGC + - -
AT+CMGD + - -
AT+CMGF + - -
AT+CMGL + - -
AT+CMGR + - -
AT+CMGS + - -
AT+CMGW + - -
AT+CMSS + - -
AT+CNMA + - -
AT+CNMI + - -
AT+CPMS + - -
AT+CSCA + - -
AT+CSCB + - -
AT+CSDH + - -
AT+CSMP + - -
AT+CSMS + - -
AT^SLMS + - -
AT^SMGL + - -
AT^SMGO + - -
AT^SMGR + - -
AT^SSCONF + - -
AT^SSDA + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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AT^SSMSS + - -
SIM related Commands
AT+CRSM + - -
AT^SXSM + - -
AT^SCKS + - -
AT^SCID + - -
AT+CXXCID + - -
SIM Application Toolkit (SAT) Commands
AT^SSTA + - -
^SSTN + - -
AT^SSTGI + - -
AT^SSTR + - -
Phonebook Commands
AT+CPBR + - -
AT+CPBS + - -
AT+CPBW + - -
AT^SPBC + - -
AT^SPBD + - -
AT^SPBG + - -
AT^SPBS + - -
AT+CNUM + - -
AT^SDLD + - -
Audio Commands
ATL + - -
ATM + - -
AT+CLVL + - -
AT+CMUT + - -
AT+VTD + - -
AT+VTS + - -
AT^SAIC + - -
AT^SNFA + - -
AT^SNFD + - -
AT^SNFI + - -
AT^SNFM + - -
AT^SNFO + - -
AT^SNFPT + - -
AT^SNFS + - -
AT^SNFTTY + - -
AT^SNFV + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.4 Availability of AT Commands Depending on Operating Mode of ME s
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AT^SNFW + - -
AT^SRTC + - -
Hardware Related Commands
AT+CCLK +++
AT+CALA +++
AT^SBC + + ±
AT^SBV +++
AT^SCTM +++
AT^SSYNC + - -
Miscellaneous Commands
A/ + - -
ATS3 + - -
ATS4 + - -
ATS5 + - -
AT Command Normal Mode Charge
MC55i AT Command Set
20.5 AT Command Settings storable with AT&W s
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20.5 AT Command Settings storable with AT&W
Table 20.7: Settings Stored to User Profile on ASC0 / MUX Channel 1
AT Command Stored Parameters
Configuration Commands
ATQ <n>
ATV <value>
ATX <value>
AT+CMEE <errMode>
Status Control Commands
ATS18 <n>
Serial Interface Control Commands
AT\Q <n>
AT&C <value>
AT&D <value>
AT&S <value>
ATE <value>
AT+ILRR <value>
Call related Commands
ATS0 <n>
ATS6 <n>
ATS7 <n>
ATS8 <n>
ATS10 <n>
AT+CBST <speed>, <name>, <ce>
AT+CRLP <iws>, <mws>, <T1>, <N2>
AT^SLCC <n>
AT+CR <mode>
AT+CRC <mode>
Network Service Commands
AT+COPS <format>
AT+CREG <n>
Supplementary Service Commands
AT^SACM <n>
AT+CLIP <n>
GPRS Commands
ATS0 <n>
MC55i AT Command Set
20.5 AT Command Settings storable with AT&W s
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Table 20.8: Settings Stored to User Profile on ASC1 / MUX Channels 2 and 3
FAX Commands
AT+FCLASS <n>
Short Message Service (SMS) Commands
AT+CMGF <mode>
AT+CNMI <mode>, <mt>, <bm>, <ds>
AT+CSDH <show>
AT+CSMS <service>
AT^SMGO <n>
SIM related Commands
AT^SCKS <mode>
Miscellaneous Commands
ATS3 <n>
ATS4 <n>
ATS5 <n>
AT Command Stored Parameters
Configuration Commands
ATQ <n>
ATV <value>
ATX <value>
AT+CMEE <errMode>
Serial Interface Control Commands
AT\Q <n>
AT&C <value>
AT&D <value>
AT&S <value>
ATE <value>
Call related Commands
ATS0 <n>
AT^SLCC <n>
AT+CR <mode>
AT+CRC <mode>
Network Service Commands
AT+COPS <format>
AT Command Stored Parameters
MC55i AT Command Set
20.5 AT Command Settings storable with AT&W s
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AT+CREG <n>
Supplementary Service Commands
AT^SACM <n>
AT+CLIP <n>
GPRS Commands
ATS0 <n>
Short Message Service (SMS) Commands
AT+CMGF <mode>
AT+CNMI <mode>, <mt>, <bm>, <ds>
AT+CSDH <show>
AT+CSMS <service>
AT^SMGO <n>
SIM related Commands
AT^SCKS <mode>
Miscellaneous Commands
ATS3 <n>
ATS4 <n>
ATS5 <n>
AT Command Stored Parameters
MC55i AT Command Set
20.6 Factory Default Settings Restorable with AT&F s
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20.6 Factory Default Settings Restorable with AT&F
Table 20.9: Factory Default Settings Restorable with AT&F
AT Command Factory Defaults
Configuration Commands
ATQ <n>=0
ATV <value>=1
ATX <value>=4
AT+CFUN <fun>=1
AT+CMEE <errMode>=0
AT+CSCS <chset>="GSM"
AT^SM20 <CallMode>=1, <CmgwMode>=1
AT^SCFG <tcpIrt>="3", <tcpMr>="10", <tcpOt>="6000", <tcpWith-
Urc>="on"
Status Control Commands
AT+CMER <mode>=0, <keyp>=0, <disp>=0, <ind>=0, <bfr>=0
AT+CIND <mode>=1
ATS18 <n>=0
Serial Interface Control Commands
AT\Q <n>=0
AT&C <value>=1
AT&D <value>=2
AT&S <value>=0
ATE <value>=1
AT+ILRR <value>=0
Call related Commands
ATS0 <n>=000
ATS6 <n>=000
ATS7 <n>=060
ATS8 <n>=0
ATS10 <n>=002
AT+CBST <speed>=7, <name>=0, <ce>=1
AT+CRLP <iws>=61, <mws>=61, <T1>=78, <N2>=6
AT^SLCC <n>=0
AT+CR <mode>=0
AT+CRC <mode>=0
Network Service Commands
AT+COPS <format>=0
AT+CREG <n>=0
MC55i AT Command Set
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AT^SALS <view>=0, <line>=1
Supplementary Service Commands
AT^SACM <n>=0
AT+CLIP <n>=0
AT+CSSN <n>=0, <m>=0
AT+CUSD <n>=0
GPRS Commands
AT+CGAUTO <n>=3
AT+CGREG <n>=0
AT+CGSMS <service>=3
AT^SGAUTH <auth>=3
ATS0 <n>=000
FAX Commands
AT+FCLASS <n>=0
Short Message Service (SMS) Commands
AT+CMGF <mode>=0
AT+CNMI <mode>=0, <mt>=0, <bm>=0, <ds>=0, <bfr>=1
AT+CSCB <mode>=0, <mids>=" ", <dcss>=" "
AT+CSDH <show>=0
AT+CSMP <fo>=17, <vp>=167, <dcs>=0, <pid>=0
AT+CSMS <service>=0
AT^SMGO <n>=0
AT^SSCONF <ra>=0
AT^SSDA <da>=0
AT^SSMSS <seq>=0
SIM related Commands
AT^SCKS <mode>=0
Phonebook Commands
AT+CPBS <storage>="SM"
AT^SPBS <internal-counter>=0
Audio Commands
AT+VTD <duration>=1
Hardware Related Commands
AT^SCTM <n>=0, <p>=0
AT Command Factory Defaults
MC55i AT Command Set
20.6 Factory Default Settings Restorable with AT&F s
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Miscellaneous Commands
ATS3 <n>=013
ATS4 <n>=010
ATS5 <n>=008
AT Command Factory Defaults
MC55i AT Command Set
20.7 Summary of Unsolicited Result Codes (URC) s
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20.7 Summary of Unsolicited Result Codes (URC)
Table 20.10: Summary of Unsolicited Result Codes (URC)
AT Command URC
Configuration Commands
AT+CFUN ^SYSSTART
AT+CFUN ^SYSSTART CHARGE ONLY MODE
AT^SMSO ^SHUTDOWN
Status Control Commands
AT+CMER +CIEV: <indDescr>, <indValue>1[, <indValue>2]
AT^SIND +CIEV: <indDescr>, <indValue>
AT^SIND +CIEV: <indDescr>, <indValue>, <vmCounter>
AT^SIND +CIEV: <indDescr>, <indValue>, <eonsOperator>, <servProvider>
AT^SIND +CIEV: <indDescr>, <nitzUT>, <nitzTZ>, <nitzDST>
Call related Commands
AT^SLCC if the list of current calls is empty:
^SLCC:
if one or more calls are currently in the list:
^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel
assigned>[, <number>, <type>[, <alpha>]]
[^SLCC: <idx>, <dir>, <stat>, <mode>, <mpty>, <traffic channel
assigned>[, <number>, <type>[, <alpha>]]]
[... ]
^SLCC:
AT+CRC RING
AT+CRC +CRING: <type>
Network Service Commands
AT+CREG +CREG: <stat>
AT+CREG +CREG: <stat>[, <lac>, <ci>]
AT^SALS ^SALS: <line>
Supplementary Service Commands
AT^SACM +CCCM: <ccm>
AT+CCWA +CCWA: <calling number>, <type of number>, <class>, , <CLI validity>
AT+CCWA ^SCWA:
AT+CLIP +CLIP: <number>, <type>[, , [, [<alpha>][, <CLI validity>]]]
AT+CLIP +CLIP: <number>, <type>
AT+COLP +COLP: <number>, <type>
AT+CSSN +CSSI: <code 1>
AT+CSSN +CSSU: <code 2>
AT+CUSD +CUSD: <m>[<str_urc>[<dcs>]]
MC55i AT Command Set
20.7 Summary of Unsolicited Result Codes (URC) s
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Internet Service Commands
AT^SISR ^SISR: <srvProfileId>, <urcCauseId>
AT^SISW ^SISW: <srvProfileId>, <urcCauseId>
Internet Ser-
vice URC "^SIS"
^SIS: <srvProfileId>, <urcCause>[, [<urcInfoId>][, <urcInfoText>]]
GPRS Commands
AT+CGEREP +CGEV: REJECT <PDP_type>, <PDP_addr>
AT+CGEREP +CGEV: NW REACT <PDP_type>, <PDP_addr>, [<cid>]
AT+CGEREP +CGEV: NW DEACT <PDP_type>, <PDP_addr>, [<cid>]
AT+CGEREP +CGEV: ME DEACT <PDP_type>, <PDP_addr>, [<cid>]
AT+CGEREP +CGEV: NW DETACH
AT+CGEREP +CGEV: ME DETACH
AT+CGEREP +CGEV: NW CLASS <class>
AT+CGEREP +CGEV: ME CLASS <class>
AT+CGREG +CGREG: <stat>
Short Message Service (SMS) Commands
AT+CNMI +CMTI: <mem3>, <index>
AT+CNMI +CMT: <length><CR><LF><pdu>
AT+CNMI +CMT: <oa>, <scts>[, <tooa>, <fo>, <pid>, <dcs>, <sca>, <tosca>,
<length>]<CR><LF><data>
AT+CNMI +CBM: <length><CR><LF><pdu>
AT+CNMI +CBM: <sn>, <mid>, <dcs>, <page>, <pages><CR><LF><data>
AT+CNMI +CDS: <length><CR><LF><pdu>
AT+CNMI +CDS: <fo>, <mr>[, <ra>][, <tora>], <scts>, <dt>, <st>
AT+CNMI +CDSI: <mem3>, <index>
AT^SMGO ^SMGO: <mode>
SIM related Commands
AT^SCKS ^SCKS: <SimStatus>
SIM Application Toolkit (SAT) Commands
^SSTN ^SSTN: <cmdType>
^SSTN ^SSTN: <cmdTerminateValue>
^SSTN ^SSTN: 254
^SSTN ^SSTN: 255
Hardware Related Commands
AT+CALA +CALA: [<text>]
AT+CALA ^SYSSTART ALARM MODE
+CALA: <text>
AT^SBC ^SBC: Undervoltage
AT Command URC
MC55i AT Command Set
20.7 Summary of Unsolicited Result Codes (URC) s
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AT^SCTM ^SCTM_A: <m>
AT^SCTM ^SCTM_B: <m>
AT Command URC
MC55i AT Command Set
20.8 Alphabetical List of AT Commands s
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20.8 Alphabetical List of AT Commands
Table 20.11: Alphabetical List of AT Commands
AT Command Description Section and Page
+++ Switch from data mode to command mode Section 7.17, page 147
^SSTN SAT Notification Section 15.2, page 381
A/ Repeat previous command line Section 19.1, page 443
AT&C Set Data Carrier Detect (DCD) Line mode Section 4.2, page 90
AT&D Set Data Terminal Ready (DTR) line mode Section 4.3, page 91
AT&F Set all current parameters to manufacturer defaults Section 2.1, page 31
AT&S Set Data Set Ready (DSR) line mode Section 4.4, page 92
AT&V Display current configuration Section 2.2, page 32
AT&W Stores current configuration to user defined profile Section 2.3, page 34
AT+CACM Accumulated call meter (ACM) reset or query Section 9.1, page 194
AT+CALA Set alarm time Section 18.2, page 431
AT+CAMM Accumulated call meter maximum (ACMmax) set or query Section 9.3, page 197
AT+CAOC Advice of Charge information Section 9.4, page 198
AT+CBST Select bearer service type Section 7.18, page 148
AT+CCFC Call forwarding number and conditions control Section 9.6, page 201
AT+CCLK Real Time Clock Section 18.1, page 430
AT+CCUG Closed User Group Section 9.5, page 199
AT+CCWA Call Waiting Section 9.7, page 205
AT+CEER Extended Error Report Section 3.4, page 74
AT+CFUN Set phone functionality Section 2.8, page 39
AT+CGACT PDP context activate or deactivate Section 11.1, page 269
AT+CGANS Manual response to a network request for PDP context
activation
Section 11.2, page 271
AT+CGATT GPRS attach or detach Section 11.3, page 273
AT+CGAUTO Automatic response to a network request for PDP context
activation
Section 11.4, page 274
AT+CGDATA Enter data state Section 11.6, page 278
AT+CGDCONT Define PDP Context Section 11.7, page 280
AT+CGEREP GPRS event reporting Section 11.5, page 276
AT+CGMI Request manufacturer identification Section 6.2, page 124
AT+CGMM Request model identification Section 6.4, page 125
AT+CGMR Request revision identification of software status Section 6.6, page 126
AT+CGPADDR Show PDP address Section 11.8, page 282
AT+CGQMIN Quality of Service Profile (Minimum acceptable) Section 11.9, page 283
AT+CGQREQ Quality of Service Profile (Requested) Section 11.10, page 287
AT+CGREG GPRS Network Registration Status Section 11.11, page 291
AT+CGSMS Select service for MO SMS messages Section 11.12, page 293
AT+CGSN Request International Mobile Equipment Identity (IMEI) Section 6.8, page 127
AT+CHLD Call Hold and Multiparty Section 9.8, page 209
MC55i AT Command Set
20.8 Alphabetical List of AT Commands s
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AT+CHUP Hang up call Section 7.10, page 140
AT+CIMI Request International Mobile Subscriber Identity (IMSI) Section 6.10, page 128
AT+CIND Indicator control Section 3.2, page 65
AT+CLCC List of current calls Section 7.20, page 150
AT+CLCK Facility lock Section 5.4, page 112
AT+CLIP Calling Line Identification Presentation Section 9.9, page 211
AT+CLIR Calling Line Identification Restriction Section 9.10, page 213
AT+CLVL Loudspeaker volume level Section 17.4, page 406
AT+CMEE Mobile Equipment Error Message Format Section 2.11, page 46
AT+CMER Mobile Equipment Event Reporting Section 3.1, page 63
AT+CMGC Send an SMS command Section 13.2, page 338
AT+CMGD Delete short message Section 13.3, page 339
AT+CMGF Select SMS message format Section 13.4, page 340
AT+CMGL List SMS messages from preferred store Section 13.5, page 341
AT+CMGR Read SMS messages Section 13.6, page 343
AT+CMGS Send Short Message Section 13.7, page 345
AT+CMGW Write Short Messages to Memory Section 13.8, page 347
AT+CMSS Send short messages from storage Section 13.9, page 349
AT+CMUT Mute control Section 17.5, page 407
AT+CMUX Enter multiplex mode Section 4.8, page 99
AT+CNMA New Message Acknowledgement to ME/TE, only phase
2+
Section 13.10, page 350
AT+CNMI New short Message Indication Section 13.11, page 351
AT+CNUM Read own numbers Section 16.9, page 402
AT+COLP Connected Line Identification Presentation Section 9.11, page 214
AT+COPN Read operator names Section 8.1, page 165
AT+COPS Operator Selection Section 8.2, page 166
AT+CPAS Mobile equipment activity status Section 3.6, page 87
AT+CPBR Read from Phonebook Section 16.2, page 385
AT+CPBS Select phonebook memory storage Section 16.3, page 388
AT+CPBW Write into Phonebook Section 16.4, page 390
AT+CPIN PIN Authentication Section 5.1, page 102
AT+CPIN2 PIN2 Authentication Section 5.2, page 106
AT+CPMS Preferred SMS message storage Section 13.12, page 354
AT+CPOL Preferred Operator List Section 8.14, page 191
AT+CPUC Price per unit and currency table Section 9.12, page 216
AT+CPWD Change Password Section 5.6, page 118
AT+CR Service reporting control Section 7.22, page 157
AT+CRC Set Cellular Result Codes for incoming call indication Section 7.23, page 158
AT+CREG Network registration Section 8.4, page 171
AT+CRLP Select radio link protocol parameters for originated non-
transparent data calls
Section 7.19, page 149
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20.8 Alphabetical List of AT Commands s
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AT+CRSM Restricted SIM Access Section 14.1, page 371
AT+CSCA SMS Service Center Address Section 13.13, page 356
AT+CSCB Select Cell Broadcast Message Indication Section 13.14, page 357
AT+CSCS Select TE character set Section 2.12, page 51
AT+CSDH Show SMS text mode parameters Section 13.15, page 358
AT+CSMP Set SMS text Mode Parameters Section 13.16, page 359
AT+CSMS Select Message Service Section 13.17, page 361
AT+CSNS Single Numbering Scheme Section 7.24, page 159
AT+CSQ Signal quality Section 8.5, page 174
AT+CSSN Supplementary service notifications Section 9.13, page 218
AT+CUSD Unstructured supplementary service data Section 9.14, page 220
AT+CXXCID Display card ID Section 14.5, page 378
AT+FBADLIN Bad Line Threshold Section 12.2, page 307
AT+FBADMUL Error Threshold Multiplier Section 12.3, page 308
AT+FBOR Query data Bit Order Section 12.4, page 309
AT+FCIG Query or set the Local Polling ID Section 12.5, page 310
AT+FCLASS Fax: Select, read or test service class Section 12.6, page 311
AT+FCQ Copy Quality Checking Section 12.7, page 312
AT+FCR Capability to Receive Section 12.8, page 313
AT+FDCC Query or set capabilities Section 12.9, page 314
AT+FDFFC Data Compression Format Conversion Section 12.10, page 315
AT+FDIS Query or set session parameters Section 12.11, page 316
AT+FDR Begin or continue phase C Data Reception Section 12.12, page 317
AT+FDT Data Transmission Section 12.13, page 318
AT+FET End a page or document Section 12.14, page 319
AT+FK Kill operation, orderly FAX abort Section 12.15, page 320
AT+FLID Query or set the Local Id setting capabilities Section 12.16, page 321
AT+FMDL Identify Product Model Section 12.17, page 322
AT+FMFR Request Manufacturer Identification Section 12.18, page 323
AT+FOPT Set bit Order independently Section 12.19, page 324
AT+FPHCTO DTE Phase C Response Timeout Section 12.20, page 325
AT+FREV Identify Product Revision Section 12.21, page 326
AT+FRH Receive Data Using HDLC Framing Section 12.22, page 327
AT+FRM Receive Data Section 12.23, page 328
AT+FRS Receive Silence Section 12.24, page 329
AT+FTH Transmit Data Using HDLC Framing Section 12.25, page 330
AT+FTM Transmit Data Section 12.26, page 331
AT+FTS Stop Transmission and Wait Section 12.27, page 332
AT+FVRFC Vertical Resolution Format Conversion Section 12.28, page 333
AT+GCAP Request complete TA capabilities list Section 2.10, page 45
AT+GMI Request manufacturer identification Section 6.3, page 124
AT+GMM Request model identification Section 6.5, page 125
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AT+GMR Request revision identification of software status Section 6.7, page 126
AT+GSN Request International Mobile Equipment Identity (IMEI) Section 6.9, page 127
AT+ILRR Set TE-TA local rate reporting Section 4.6, page 94
AT+IPR Set Bitrate of local Asynchronous Serial Interface Section 4.7, page 96
AT+VTD Tone duration Section 17.6, page 408
AT+VTS DTMF and tone generation Section 17.7, page 409
AT+WS46 Select wireless network Section 3.7, page 88
AT\Q Flow control Section 4.1, page 89
AT^MONI Monitor idle mode and dedicated mode Section 8.8, page 180
AT^MONP Monitor neighbour cells Section 8.9, page 183
AT^SACM Advice of charge and query of ACM and ACMmax Section 9.2, page 195
AT^SAIC Audio Interface Configuration Section 17.8, page 410
AT^SALS Alternate Line Service Section 8.11, page 187
AT^SBC Battery Charge Control Section 18.3, page 434
AT^SBV Battery/Supply Voltage Section 18.4, page 437
AT^SCFG Extended Configuration Settings Section 2.13, page 52
AT^SCID Display SIM card identification number Section 14.4, page 377
AT^SCKS Query SIM and Chip Card Holder Status Section 14.3, page 375
AT^SCNI List Call Number Information Section 7.25, page 160
AT^SCTM Set critical operating temperature presentation mode or
query temperature
Section 18.5, page 438
AT^SDLD Delete the 'last number redial' memory Section 16.10, page 403
AT^SGAUTH Set type of authentication for PPP connection Section 11.13, page 294
AT^SGCONF Configuration of GPRS related Parameters Section 11.14, page 295
AT^SHOM Display Homezone Section 8.12, page 189
AT^SICI Internet Connection Information Section 10.2, page 229
AT^SICS Internet Connection Setup Profile Section 10.1, page 225
AT^SIND Extended Indicator Control Section 3.3, page 68
AT^SISC Internet Service Close Section 10.6, page 247
AT^SISE Internet Service Error Report Section 10.9, page 254
AT^SISI Internet Service Information Section 10.4, page 240
AT^SISO Internet Service Open Section 10.5, page 242
AT^SISR Internet Service Read Data Section 10.7, page 248
AT^SISS Internet Service Setup Profile Section 10.3, page 231
AT^SISW Internet Service Write Data Section 10.8, page 251
AT^SLCC Extended list of current calls Section 7.21, page 152
AT^SLCD Display Last Call Duration Section 7.26, page 161
AT^SLCK Facility lock Section 5.5, page 117
AT^SLMS List SMS Memory Storage Section 13.18, page 363
AT^SM20 Set M20 compatibility mode Section 2.14, page 62
AT^SMGL List Short Messages from preferred store without setting
status to REC READ
Section 13.19, page 364
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AT^SMGO Set or query SMS overflow presentation mode or query
SMS overflow
Section 13.20, page 365
AT^SMGR Read short message without setting status to REC READ Section 13.21, page 367
AT^SMONC Cell Monitoring Section 8.6, page 175
AT^SMOND Cell Monitoring Section 8.7, page 177
AT^SMONG GPRS Monitor Section 8.10, page 185
AT^SMSO Switch off mobile station Section 2.9, page 44
AT^SNFA Set or query of microphone attenuation Section 17.9, page 412
AT^SNFD Set audio parameters to manufacturer default values Section 17.10, page 414
AT^SNFI Set microphone path parameters Section 17.11, page 415
AT^SNFM Set microphone audio path and power supply Section 17.12, page 416
AT^SNFO Set audio output (= loudspeaker path) parameter Section 17.13, page 418
AT^SNFPT Set progress tones Section 17.14, page 420
AT^SNFS Select audio hardware set Section 17.15, page 421
AT^SNFTTY Signal TTY/CTM audio mode capability Section 17.16, page 424
AT^SNFV Set loudspeaker volume Section 17.17, page 426
AT^SNFW Write audio setting in non-volatile store Section 17.18, page 427
AT^SOPS Extended Operator Selection Section 8.3, page 169
AT^SPBC Find first matching entry in sorted phonebook Section 16.5, page 393
AT^SPBD Purge phonebook memory storage Section 16.6, page 394
AT^SPBG Display phonebook entries in alphabetical order Section 16.7, page 395
AT^SPBS Step through the selected phonebook alphabetically Section 16.8, page 398
AT^SPIC Display PIN counter Section 5.3, page 108
AT^SPLM Read the PLMN list Section 8.13, page 190
AT^SPLR Read entry from the preferred operators list Section 8.15, page 192
AT^SPLW Write an entry to the preferred operators list Section 8.16, page 193
AT^SPWD Change Password Section 5.7, page 122
AT^SRTC Ring tone configuration Section 17.19, page 428
AT^SSCONF SMS Command Configuration Section 13.22, page 368
AT^SSDA Set SMS Display Availability Section 13.23, page 369
AT^SSMSS Set Short Message Storage Sequence Section 13.24, page 370
AT^SSTA SAT Interface Activation Section 15.1, page 379
AT^SSTGI SAT Get Information Section 15.3, page 382
AT^SSTR SAT Response Section 15.4, page 383
AT^SSYNC Configure SYNC Pin Section 18.6, page 441
AT^STCD Display Total Call Duration Section 7.27, page 162
AT^SXSM Extended SIM Access Section 14.2, page 373
ATA Answer a call Section 7.2, page 130
ATA Manual response to a network request for PDP context
activation
Section 11.15, page 296
ATD Mobile originated call to specified number Section 7.3, page 131
ATD*98# Request GPRS IP service Section 11.17, page 298
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MC55i AT Command Set
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ATD*99# Request GPRS service Section 11.16, page 297
ATD><mem><n> Mobile originated call using specific memory and index
number
Section 7.4, page 133
ATD><n> Mobile originated call from active memory using index
number
Section 7.5, page 135
ATD><str> Mobile originated call from active memory using corre-
sponding field
Section 7.6, page 136
ATDI Mobile originated call to ISDN number Section 7.7, page 137
ATDL Redial last number used Section 7.8, page 138
ATE Enable command echo Section 4.5, page 93
ATH Disconnect existing connection Section 7.9, page 139
ATH Manual rejection of a network request for PDP context
activation
Section 11.18, page 299
ATI Display product identification information Section 6.1, page 123
ATL Set monitor speaker loudness Section 17.2, page 405
ATM Set monitor speaker mode Section 17.3, page 405
ATO Switch from command mode to data mode / PPP online
mode
Section 7.16, page 146
ATP Select pulse dialing Section 7.28, page 163
ATQ Set result code presentation mode Section 2.4, page 35
ATS0 Set number of rings before automatically answering a call Section 7.11, page 141
ATS0 Automatic response to a network request for PDP context
activation
Section 11.19, page 300
ATS10 Set disconnect delay after indicating the absence of data
carrier
Section 7.15, page 145
ATS18 Extended call release report Section 3.5, page 85
ATS2 Set escape sequence character Section 7.30, page 164
ATS3 Set command line termination character Section 19.2, page 444
ATS4 Set response formatting character Section 19.3, page 445
ATS5 Write command line editing character Section 19.4, page 446
ATS6 Set pause before blind dialing Section 7.12, page 142
ATS7 Set number of seconds to wait for connection completion Section 7.13, page 143
ATS8 Set number of seconds to wait for comma dialing modifier Section 7.14, page 144
ATT Select tone dialing Section 7.29, page 163
ATV Set result code format mode Section 2.5, page 36
ATX Set CONNECT result code format and call monitoring Section 2.6, page 37
ATZ Set all current parameters to user defined profile Section 2.7, page 38
AT Command Description Section and Page

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