Telit Communications S p A GM862P GSM Module User Manual o
Telit Communications S.p.A. GSM Module o
Users Manual
Telit GM862 PCS
Tri Band GPRS Data Terminal System
TECHNICAL
MANUAL
Code: 1vv0300638
Rev. 2
Oct. 23, 2003
REV SUBJECT OF MODIFICATION DATE SIGNATURE
REVISION INDEX
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
MOD.
1 Change pcb revision from CS1083 to CS1083a 17/07/03
2 Change value on a PCB components 21/10/03
Rev. 2
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Page 1 of 2
1 INTRODUCTION
The Telit GM862 PCS is a Tri Band transceiver with integrated Data Terminal Adapter
functions that emulates a traditional modem allowing the compatibility in GSM/DCS/
PCS environment with many data communication software.
The design and development of the Telit GM862 PCS Tri Band cellular data terminal
system is in line with the following documents:
3GPP TS 51.010–1 v. 4.4.0 GSM/EDGE Radio Access Network; Digital cellular
telecommunications system (Phase 2+): Mobile Station (MS) Conformance
Specification; Part 1. Conformance Specification.
EN 301 511 Global system for mobile communications (GSM); Harmonised standard
for mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements under Article 3(2) of the R&TTE directive (1999/5/EC).
EN 60950 Safety of information technology equipment, including business equipment.
EN 301 489–07 Electromagnetic compatibility and radio spectrum matters (ERM);
Electromagnetic compatibility (EMC) standard for radio equipment and services; Part
7: Specific conditions for mobile and portable radio and ancillary equipment of digital
cellular radio telecommunications systems (GSM and DCS).
Rev. 2
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Page 2 of 2
1.1 Delta HW between GM862–PCS HW rev.1 and GM862–PCS HW rev.2
The changes that determines the difference between the GM862–PCS HW rev.1 and
the GM862–PCS HW rev.2 are the following:
On the GM862–PCS HW rev.2 the following components are added/changed:
Added: R103 47KOhm 0402 between AXE and Vcore.
See CP030027 for further details.
Changed: R327 changed value from 220R 5% 0402 to 820R 5% 0402
See CP030041 for further details.
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Page 1 of 1
2 MECHANICAL VIEW
2.1 Mechanical view Telit GM862 PCS
DIS Verif.
Progetto
Denominazione dell’oggetto: CODICE
N.fogli
Sostituisce il N.
Foglio
Valido da:
Data
MODIFICA
Scala:
DATA
Toll.gen.
Materiale:
Annotazioni:
Il presente disegno a termini di legge non deve essere utilizzato per la costruzione del particolare ne’ riprodotto o reso pubblico senza il nostro permesso scritto.
0260
Lucà
03.07.2003
1:1 11
MECHANICAL VIEW GM862 PCS 40260NT10072
Rev. 1
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System
Page 1 of 1
3 TECHNICAL SPECIFICATIONS
The scope of this document is to summarize the technical characteristics of the Telit
GM862 PCS Data Terminal System.
Page 1 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
Contents
1GENERAL PRODUCT DESCRIPTION.................................................................................7
1.1 Dimensions .............................................................................................................................................................................7
1.2 Weight......................................................................................................................................................................................8
1.3 Environmental requirements ............................................................................................................................................8
1.3.1 Temperature range.......................................................................................................................................................8
1.3.2 Vibration Test (non functional).................................................................................................................................8
1.4 Operating Frequency...........................................................................................................................................................9
1.5 Transmitter output power..................................................................................................................................................9
1.6 Reference sensitivity.............................................................................................................................................................9
1.7 Antenna................................................................................................................................................................................10
1.7.1 Antenna connector.....................................................................................................................................................10
1.8 Supply voltage.................................................................................................................................................................... 12
1.9 Power consumption...........................................................................................................................................................12
1.10 Embodied Battery charger..............................................................................................................................................12
1.11 User Interface..................................................................................................................................................................... 13
1.11.1 Speech Coding............................................................................................................................................................13
1.11.2 Sim Reader..................................................................................................................................................................13
1.11.3 SMS..............................................................................................................................................................................13
1.11.4 Real Time Clock and Alarm.....................................................................................................................................13
1.11.5 Data/fax transmission................................................................................................................................................13
1.11.6 Local security management......................................................................................................................................14
1.11.7 Call control..................................................................................................................................................................14
1.11.8 Phonebook...................................................................................................................................................................14
1.11.9 Characters management............................................................................................................................................14
1.11.10 SIM related functions................................................................................................................................................14
1.11.11 Call status indication.................................................................................................................................................14
1.11.12 Indication of network service availability .............................................................................................................14
1.11.13 Automatic answer (Voice, Data or FAX)..............................................................................................................15
1.11.14 Supplementary services (SS)....................................................................................................................................15
1.11.15 Acoustic signaling .....................................................................................................................................................15
1.11.16 DTMF tones................................................................................................................................................................15
1.11.17 Buzzer output .............................................................................................................................................................16
1.12 EMC.......................................................................................................................................................................................16
1.13 Logic level specifications .................................................................................................................................................16
1.13.1 Reset signal.................................................................................................................................................................17
1.14 Audio levels specifications...............................................................................................................................................19
1.15 Interface connectors on GM862-PCS ..........................................................................................................................20
Page 2 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
1.16 Mounting the GM862-PCS on your Board................................................................................................................. 25
1.16.1 Antenna Coaxial cable fixing...................................................................................................................................25
1.16.2 Precautions..................................................................................................................................................................26
2AT COMMAND........................................................................................................................27
2.1 Definitions............................................................................................................................................................................27
2.2 AT Command Syntax.......................................................................................................................................................28
2.2.1 Command lines...........................................................................................................................................................28
2.2.2 Information responses and result codes .................................................................................................................29
2.2.3 Command Response Timeout..................................................................................................................................29
2.2.4 Command issuing timing..........................................................................................................................................32
2.2.5 Factory Profile and parameters stored in the profile ............................................................................................32
2.3 Command Availability Table......................................................................................................................................... 33
2.4 Hayes Compliant AT Commands ................................................................................................................................. 39
2.4.1 Generic Modem Control...........................................................................................................................................39
2.4.1.1 &F - restore factory configuration.....................................................................................................................39
2.4.1.2 Z - soft reset...........................................................................................................................................................39
2.4.1.3 +FCLASS - select active service class .............................................................................................................40
2.4.1.4 &Y - designate a default reset profile ...............................................................................................................40
2.4.1.5 &W - store current configuration.......................................................................................................................41
2.4.1.6 &Z - store telephone number in the Telit GM862-PCS module internal phonebook...............................41
2.4.1.7 &N - display internal phonebook stored numbers ..........................................................................................42
2.4.1.8 +GMI - request manufacturer identification....................................................................................................42
2.4.1.9 +GMM - request model identification ..............................................................................................................42
2.4.1.10 +GMR - request revision identification............................................................................................................43
2.4.1.11 +GCAP - request capabilities list......................................................................................................................43
2.4.1.12 +GSN - request serial number............................................................................................................................43
2.4.1.13 &V - display current configuration & profile ..................................................................................................44
2.4.1.14 &V0 - display current configuration & profile ................................................................................................45
2.4.1.15 &V1 - display S registers values .......................................................................................................................45
2.4.1.16 &V2 - display last connection statistics ...........................................................................................................46
2.4.1.17 \V - single line connect message .......................................................................................................................46
2.4.1.18 %L - report line signal level................................................................................................................................47
2.4.1.19 %Q - report line quality.......................................................................................................................................47
2.4.2 DTE - modem interface control...............................................................................................................................48
2.4.2.1 E - command echo................................................................................................................................................48
2.4.2.2 Q - quiet resut codes ............................................................................................................................................48
2.4.2.3 V- result code form...............................................................................................................................................49
2.4.2.4 X - extended result codes....................................................................................................................................49
2.4.2.5 I - Request identifier and software checksum..................................................................................................50
2.4.2.6 &C - data carrier detect (DCD) control............................................................................................................50
2.4.2.7 &D - data terminal ready (DTR) control..........................................................................................................51
2.4.2.8 &K - flow control.................................................................................................................................................51
2.4.2.9 &S - data set ready (DSR) control.....................................................................................................................52
2.4.2.10 \R - ring (RI) control............................................................................................................................................53
2.4.2.11 +IPR - fixed DTE interface rate.........................................................................................................................53
2.4.2.12 +IFC - DTE - DTA flow control........................................................................................................................54
2.4.2.13 +ILRR - DTE - modem rate reporting ..............................................................................................................55
2.4.2.14 +ICF - DTE - modem character format ............................................................................................................56
2.4.3 Call Control.................................................................................................................................................................57
2.4.3.1 D - dial....................................................................................................................................................................57
2.4.3.2 T - set tone dial......................................................................................................................................................59
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.3.3 P - set pulse dial....................................................................................................................................................59
2.4.3.4 A - answer..............................................................................................................................................................59
2.4.3.5 A/ - Last command automatic repetition ..........................................................................................................60
2.4.3.6 H - disconnect.......................................................................................................................................................60
2.4.3.7 O - return to On Line Mode................................................................................................................................61
2.4.3.8 &G - guard tone....................................................................................................................................................61
2.4.3.9 &P - pulse dial make/break ratio........................................................................................................................62
2.4.4 Modulation control....................................................................................................................................................62
2.4.4.1 +MS - modulation control...................................................................................................................................62
2.4.4.2 %E - enable/disable line quality monitor and auto retrain or fallback / fallforward .................................63
2.4.5 Compression control.................................................................................................................................................64
2.4.5.1 +DS - set data compression................................................................................................................................64
2.4.5.2 +DR - data compression reporting ....................................................................................................................64
2.4.6 Break control...............................................................................................................................................................65
2.4.6.1 \B - transmit break to remote..............................................................................................................................65
2.4.6.2 \K - break handling...............................................................................................................................................65
2.4.7 S parameters................................................................................................................................................................66
2.4.7.1 S0 - number of rings to auto answer.................................................................................................................66
2.4.7.2 S1 - ring counter...................................................................................................................................................66
2.4.7.3 S2 - escape character............................................................................................................................................67
2.4.7.4 S3 - carriage return character..............................................................................................................................67
2.4.7.5 S4 - line feed character........................................................................................................................................68
2.4.7.6 S5 - backspace character.....................................................................................................................................68
2.4.7.7 S7 - wait time for carrier, silence or dial tone .................................................................................................69
2.4.7.8 S10 - lost carrier to hang up delay.....................................................................................................................69
2.4.7.9 S12 - escape prompt delay ..................................................................................................................................70
2.4.7.10 S25 - delay to DTR off.........................................................................................................................................70
2.4.7.11 S30 - disconnect inactivity timer........................................................................................................................71
2.4.7.12 S38 - delay before forced hang up.....................................................................................................................71
2.5 ETSI GSM 07.07 AT Commands ..................................................................................................................................72
2.5.1 General.........................................................................................................................................................................72
2.5.1.1 +CGMI - request manufacturer identification.................................................................................................72
2.5.1.2 +CGMM - request model identification ...........................................................................................................72
2.5.1.3 +CGMR - request revision identification.........................................................................................................72
2.5.1.4 +CGSN - request product serial number identification..................................................................................73
2.5.1.5 +CSCS - select TE character set........................................................................................................................73
2.5.1.6 +CIMI - request international mobile subscriber identity (IMSI)................................................................74
2.5.2 Call control..................................................................................................................................................................75
2.5.2.1 +CBST - select bearer service type ...................................................................................................................75
2.5.2.2 +CRLP - radio link protocol...............................................................................................................................76
2.5.2.3 +CR - service reporting control.........................................................................................................................77
2.5.2.4 +CEER - extended error report ..........................................................................................................................78
2.5.2.5 +CRC - cellular result codes ..............................................................................................................................79
2.5.3 Network service handling.........................................................................................................................................80
2.5.3.1 +CNUM - subscriber number.............................................................................................................................80
2.5.3.2 +CREG - network registration report................................................................................................................81
2.5.3.3 +COPS - operator selection ................................................................................................................................83
2.5.3.4 +CLCK - facility lock/ unlock............................................................................................................................84
2.5.3.5 +CPWD - change facility password ..................................................................................................................85
2.5.3.6 +CLIP - calling line identification presentation..............................................................................................86
2.5.3.7 +CLIR - calling line identification restriction .................................................................................................87
2.5.3.8 +CCFC - call forwarding number and conditions ..........................................................................................88
2.5.3.9 +CCWA - call waiting.........................................................................................................................................90
2.5.3.10 +CHLD - call holding services ..........................................................................................................................91
2.5.3.11 +CUSD - unstructured supplementary service data........................................................................................92
2.5.3.12 +CAOC - advice of charge..................................................................................................................................94
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.3.13 +CLCC - list current calls ..................................................................................................................................95
2.5.3.14 +CSSN – SS Notification....................................................................................................................................96
5.4.3.15 +CCUG – Closed User Group supplementary service control....................................................................97
2.5.4 Mobile Equipment control........................................................................................................................................98
2.5.4.1 +CPAS - phone activity status ..........................................................................................................................98
2.5.4.2 +CFUN Set phone functionality (Power Saving Management)...................................................................99
2.5.4.3 +CPIN - enter PIN..............................................................................................................................................100
2.5.4.4 +CSQ- signal quality..........................................................................................................................................102
2.5.4.5 +CPBS - select phonebook memory storage .................................................................................................103
2.5.4.6 +CPBR - read phonebook entries ....................................................................................................................104
2.5.4.7 +CPBF - find phonebook entries .....................................................................................................................105
2.5.4.8 +CPBW - write phonebook entry ....................................................................................................................106
2.5.4.9 +CCLK - Clock Management ..........................................................................................................................107
2.5.4.10 +CALA - Alarm Management .........................................................................................................................108
2.5.4.11 +CALM - alert sound mode..............................................................................................................................110
2.5.4.12 +CRSL - ringer sound level..............................................................................................................................110
2.5.4.13 +CLVL - loudspeaker volume level................................................................................................................111
2.5.4.14 +CMUT - microphone mute control...............................................................................................................111
2.5.4.15 +CACM - accumulated call meter...................................................................................................................112
2.5.4.16 +CAMM - accumulated call meter maximum...............................................................................................112
2.5.4.17 +CPUC - price per unit and currency table ....................................................................................................113
2.5.5 Mobile equipment errors.........................................................................................................................................114
2.5.5.1 +CMEE - report mobile equipment error.......................................................................................................114
2.5.5.2 +CME ERROR: - ME error result code .........................................................................................................115
2.5.6 Voice Control (TIA IS-101)...................................................................................................................................116
2.5.6.1 +VTS: - DTMF tones transmission.................................................................................................................116
2.5.7 Commands For GPRS .............................................................................................................................................117
2.5.7.1 +CGACT - PDP context activate or deactivate.............................................................................................117
2.5.7.2 +CGATT - GPRS attach or detach..................................................................................................................118
2.5.7.3 +CGDATA - Enter data state...........................................................................................................................119
2.5.7.4 +CGDCONT - define PDP context .................................................................................................................120
3.3.7.1 +CGPADDR - show PDP address ..................................................................................................................121
2.5.7.5 +CGREG - GPRS network registration status ..............................................................................................122
3.3.7.2 +CGQMIN - quality of service profile (minimum acceptable)..................................................................123
3.3.7.3 +CGQREQ - quality of service profile (requested)......................................................................................124
2.5.8 Commands For Battery Charger............................................................................................................................125
2.5.8.1 +CBC - Battery Charge .....................................................................................................................................125
2.6 ETSI GSM 07.05 AT Commands for SMS and CB services...............................................................................126
2.6.1 General configuration..............................................................................................................................................126
2.6.1.1 +CSMS - select message service.....................................................................................................................126
2.6.1.2 +CPMS - preferred message storage...............................................................................................................127
2.6.1.3 +CMGF - message format.................................................................................................................................128
2.6.1.4 +CSMP – Set parameters in text mode...........................................................................................................128
2.6.1.5 +CSDH – Show parameters in text mode.......................................................................................................129
2.6.1.6 +CSAS – Save setting text mode.....................................................................................................................129
2.6.1.7 +CRES – Restore text mode settings ..............................................................................................................130
2.6.1.8 +CSCB – Select Cell Broadcast Message types ...........................................................................................131
2.6.1.9 +CMS ERROR - message service failure result code..................................................................................132
2.6.2 Message configuration............................................................................................................................................133
2.6.2.1 +CSCA - service center address......................................................................................................................133
2.6.3 Message receiving and reading .............................................................................................................................134
2.6.3.1 +CNMI - new message indications to Terminal Equipment.......................................................................134
2.6.3.2 +CMGL - list messages .....................................................................................................................................136
2.6.3.3 +CMGR - read message....................................................................................................................................138
2.6.4 Message sending and writing.................................................................................................................................140
2.6.4.1 +CMGS - send message ....................................................................................................................................140
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.6.4.2 +CMSS - send message from storage.............................................................................................................141
2.6.4.3 +CMGW - write message to memory ............................................................................................................142
2.6.4.4 +CMGD - delete message.................................................................................................................................143
2.7 Custom AT Commands..................................................................................................................................................144
2.7.1 General configuration..............................................................................................................................................144
2.7.1.1 #CAP - Change Audio Path..............................................................................................................................144
2.7.1.2 #SRS - Select ringer sound...............................................................................................................................145
2.7.1.3 #SRP –Select Ringer Path.................................................................................................................................146
2.7.1.4 #STM - Signalling Tones Mode ......................................................................................................................147
2.7.1.5 #PCT – display PIN Counter............................................................................................................................147
2.7.1.6 #SHDN – Software Shut Down .......................................................................................................................148
2.7.1.7 #WAKE – Wake from Alarm mode................................................................................................................149
2.7.1.8 #QTEMP –Query Temperature overflow.......................................................................................................150
2.7.1.9 #SGPO –Set General Purpose Output ............................................................................................................151
2.7.1.10 #GGPI – Read General Purpose Input............................................................................................................152
2.7.1.11 #GPIO –General Purpose Input/Output pin control.....................................................................................153
2.7.1.12 #MONI – Monitor Cells ....................................................................................................................................155
2.7.1.13 #QSS – Query SIM Status................................................................................................................................156
2.7.1.14 #ACAL – Set Automatic Call...........................................................................................................................157
2.7.1.15 #SMOV – SMS Overflow.................................................................................................................................158
2.7.1.16 #SHFEC – Set Handsfree echo canceller.......................................................................................................158
2.7.1.17 #HFMICG – Handsfree Microphone Gain.....................................................................................................159
2.7.1.18 #HSMICG – Handset Microphone Gain ........................................................................................................159
2.7.1.19 #SHFSD – Set Handsfree side tone ................................................................................................................160
2.7.1.20 #/ – Repeat last command .................................................................................................................................160
2.7.1.21 #BND – Select Band (DCS 1800 or PCS 1900)...........................................................................................161
2.8 FAX Class 1 Commands ................................................................................................................................................162
2.8.1 General configuration..............................................................................................................................................162
2.8.1.1 +FCLASS - select active service class ...........................................................................................................162
2.8.1.2 +FMI – Report manufacturer ID......................................................................................................................163
2.8.1.3 +FMM? – Report model ID ..............................................................................................................................163
2.8.1.4 +FMR – Report revision ID..............................................................................................................................164
2.8.2 Transmission/Reception control............................................................................................................................164
2.8.2.1 +FTS – Stop Transmission and pause............................................................................................................164
2.8.2.2 +FRS – Wait for receive silence ......................................................................................................................165
2.8.2.3 +FTM – Transmit data modulation .................................................................................................................165
2.8.2.4 +FRM – Receive data modulation...................................................................................................................166
2.8.2.5 +FTH – Transmit data with HDLC framing..................................................................................................166
2.8.2.6 +FRH – Receive data with HDLC framing....................................................................................................167
2.8.3 Serial port control.....................................................................................................................................................167
2.8.3.1 +FLO – Select flow control specified by type...............................................................................................167
2.8.3.2 +FPR – Select serial port rate...........................................................................................................................168
2.8.3.3 +FDD – Double escape character replacement control................................................................................168
2.9 Easy GPRS Extension.....................................................................................................................................................169
2.9.1 Overview...................................................................................................................................................................169
2.9.2 Easy GPRS definition..............................................................................................................................................169
2.9.2.1 Configuring the GPRS access..........................................................................................................................170
2.9.2.2 Configuring the embedded TCP/IP stack.......................................................................................................170
2.9.2.3 Defining the Internet peer to be contacted .....................................................................................................170
2.9.2.4 Open the connection with the internet host...................................................................................................170
2.9.2.5 Close the Socket and deactivate the context ..................................................................................................171
2.9.3 Known limitations ...................................................................................................................................................171
2.9.4 Easy GPRS custom AT command Definition.....................................................................................................172
2.9.4.1 #USERID – Authentication User ID control.................................................................................................172
Page 6 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.9.4.2 #PASSW – Authentication Password control...............................................................................................173
2.9.4.3 #PKTSZ –Packet Size control..........................................................................................................................174
2.9.4.4 #DSTO – Data Sending Timeout control.......................................................................................................175
2.9.4.5 #SKTTO – Socket inactivity timeout control................................................................................................176
2.9.4.6 #SKTSET – Socket definition control............................................................................................................177
2.9.4.7 #SKTOP – Socket Open command .................................................................................................................178
2.9.4.8 #QDNS – Query DNS........................................................................................................................................178
2.9.4.9 #SKTSAV – Socket Parameters Save Command.........................................................................................179
2.9.4.10 #SKTRST – Socket Parameters Reset Command.........................................................................................180
2.10 Easy Camera custom commands.................................................................................................................................181
2.10.1.1 #CAMON – Camera ON..................................................................................................................................181
2.10.1.2 #CAMOFF – Camera OFF...............................................................................................................................181
2.10.1.3 #TPHOTO – Camera Take Photo....................................................................................................................182
2.10.1.4 #RPHOTO – Camera Read Photo ...................................................................................................................182
2.10.1.5 #CSQUAL – Camera Select Quality of Photo ..............................................................................................183
2.10.1.6 #CSMODE – Camera Select Operating MODE............................................................................................184
3CONFORMITY ASSESSMENT......................................................................................... 185
LIST OF ACRONYMS................................................................................................................. 186
Page 7 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
1 General Product Description
1.1 Dimensions
The Telit GM862-PCS module overall dimension are:
• Lenght: 43.9 mm
• Width: 43.9 mm
• Thickness: 6.9 mm
• Volume: ≅ 13 cm3
The layout of Telit GM862-PCS module is shown in the following figure:
Page 8 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
1.2 Weight
The Telit GM862-PCS module weight is 23 gr with shield and 16 gr without shield.
1.3 Environmental requirements
The Telit GM862-PCS module is compliant with the applicable ETSI reference documentation
GSM 05.05 Release1999 ETSI EN300910 V8.4.1
1.3.1 Temperature range
• Temperature in normal functional conditions –10°C ÷ +55°C
• Temperature in extreme functional conditions* –20°C ÷ +70°C
• Temperature in storage conditions –30°C ÷ +85°C
*these temperature can affect the sensitivity and performance of the module
1.3.2 Vibration Test (non functional)
• 10 ÷12Hz ASD = 1.92m 2 /s 3
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
• 12 ÷ 150Hz –3dB/oct
1.4 Operating Frequency
The operating frequencies in GSM, DCS, PCS modes are conform to the GSM specifications.
Mode Freq. TX (MHz) Freq. RX (MHz) Channels (ARFC) TX - RX offset
E-GSM-900 890.0 - 914.8 935.0 - 959.8 0 – 124 45 MHz
880.2 - 889.8 925.2 - 934.8 975 - 1023
DCS-1800 1710.2 - 1784.8 1805.2 - 1879.8 512 – 885 95 MHz
PCS-1900 1850.2 - 1909.8 1930.2 - 1989.8 512 - 810 80 MHz
NOTE: PCS 1900 is supported only in the Telit GM862-PCS module
1.5 Transmitter output power
GSM–900
The GM862-PCS transceiver module in GSM–900 operating mode are of class 4 in accordance
with the specification which determine the nominal 2W peak RF power (+33dBm) on 50 Ohm.
DCS–1800
The GM862-PCS transceiver module in DCS–1800 operating mode are of class 1 in accordance
with the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.
PCS–1900
The GM862-PCS transceiver module in PCS–1900 operating mode are of class 1 in accordance
with the specifications which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.
1.6 Reference sensitivity
GSM–900
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 4
GSM–900 portable terminals is better than –102dBm in all the operational conditions.
DCS–1800
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1
portable terminals GSM 1800 is better than –102dBm in normal operating conditions.
PCS–1900
The sensitivity of the GM862-PCS transceiver module according to the specifications for the class 1
portable terminals PCS 1900 is better than –102dBm in normal operating conditions.
Page 10 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
1.7 Antenna
The antenna that the customer chooses to use, depending on his application, should fulfil the
following requirements:
Frequency range Standard Dual Band frequency range,
Standard Tri Band frequency range for -PCS
Bandwith 80 MHz in GSM & 170 MHz in DCS & 140
MHz PCS band
Gain > 0 dB (referenced to l/2 dipole)
Impedance 50 ohm
Input power > 2 W peak power
NOTE: PCS 1900 frequency coverage is required only for the Telit GM862-PCS module
1.7.1 Antenna connector
The Telit GM862-PCS module includes a 50 Ohm MMCX coaxial female 2 PIN Angle Coax SMD
J01341A0081 connector to allow the antenna connection.
On the user application side the following connector must be used:
a) Telegärtner MMCX angle plug crimp - Order n. J01340A0121
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Tri Band GPRS Data Terminal System Rev.1
connector is locatable at:
Telegärtner - K. Gärtner GmbH
Lerchenstrasse 35, D-71144 Steinenbronn
Phone: (+49) 71 57 125 100
NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The Telit
GM862-PCS module RF connector can be damaged if not connected with the proper antenna
RF connector. The minimum number of insertion cycles are recommended.
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Tri Band GPRS Data Terminal System Rev.1
1.8 Supply voltage
The external power supply must be connected to VBATT signal (see paragraph 1.15,Interface
connectors on GM862-PCS) and must fulfil the following requirements:
• Nominal operating voltage 3.8 V
• Operating voltage range 3.4 V - 4.2 V
1.9 Power consumption
The typical current consumption of the Telit GM862-PCS module are:
• Power off current (typical) 26 µA;
• Stand–by current < 17 mArms (< 4 mArms using command AT+CFUN )
• Operating current 250 mArms @ typical network conditions
• Operating current 350 mArms 1.9 Apeak @ worst network conditions
1.10 Embodied Battery charger
This feature is available only on the Telit GM862-PCS.
The battery charger is suited for 3.7V rechargeable Li-Ion battery and it might be used with less
performances also with different technology batteries. The Charger needs only 1 CURRENT
LIMITED power source input and charges the battery directly through VBATT connector pins.
• Battery charger input pin CHARGE
• Battery pins VBATT, GND
• Battery charger input voltage min 5.0 V
• Battery charger input voltage typ 5.5 V
• Battery charger input voltage max 7.0 V
• Battery charger input current max 400mA
• Battery type Rechargeable Li-Ion
NOTE: If embodied battery charger is used, then a LOW ESR capacitor of at least 100µF must be
mounted in parallel to VBATT GM862-PCS pins.
NOTE: when power is supplied to the CHARGE pin, a battery must always be connected to the
VBATT pins of the GM862-PCS.
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Tri Band GPRS Data Terminal System Rev.1
1.11 User Interface
The user interface is managed by AT commands specified on the GSM 07.07 and 07.05
specification and listed in the chapter 2, AT Command.
1.11.1 Speech Coding
The Telit GM862-PCS vocoder supports the following rates:
• Half Rate.
• Full rate,
• Enhanced Full Rate
1.11.2 Sim Reader
The Telit GM862-PCS support phase 2 GSM11.14 - SIM 3 volts ONLY. For 5V SIM operation an
external level translator can be added.
Furthermore the Telit GM862-PCS have an internal built-in SIM card reader, so there's no need for
an external SIM housing.
The Telit GM862-PCS has an enhanced internal built-in SIM card reader that allows also hot
removal of the SIM sensing, so there's no need for an external SIM housing.
1.11.3 SMS
The Telit GM862-PCS module supports the following SMS types:
Mobile Terminated (MT) class 0 – 2 with signalling of new incoming SMS, SIM full, SMS read
Mobile Originated class 0 – 3 with writing, memorise in SIM and sending
Cell Broadcast compatible with CB DRX with signalling of new incoming SMS.
1.11.4 Real Time Clock and Alarm
The Telit GM862-PCS module supports the Real Time Clock and Alarm functions through AT
commands, furthermore an alarm output pin (GPIO6) can be configured to indicate the alarm with a
hardware line output.
1.11.5 Data/fax transmission
The Telit GM862-PCS module supports:
• Packed Data transfer GPRS Class B, Multislot Class 10.
• Data transmission according to the GSM 07.07, 07.05
• CSD up to 14.4 Kbps
• Fax service, Class 1 Group 3
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Tri Band GPRS Data Terminal System Rev.1
1.11.6 Local security management
With lock of Subscriber Identity module (SIM), and security code request at power–up.
1.11.7 Call control
Call cost control function.
1.11.8 Phonebook
Function available to store the telephone numbers in SIM memory.
Capability depends on SIM version/memory
1.11.9 Characters management
Availability of lowercase, uppercase and IRA characters. (international reference alphabet)
In SMS PDU mode all character set are supported.
1.11.10 SIM related functions
Activation/deactivation of the numbers stored in phone book FDN, ADN and PINs. Extension at the
PIN2 for the PUK2 insertion capability for lock condition.
1.11.11 Call status indication
By AT commands.
1.11.12 Indication of network service availability
By AT commands and LED indication on dedicated output.
The STAT_LED is an Open Collector output where it is possible to directly connect a LED to show
information on the network service availability and Call status.
STAT_LED indications
LED status Device Status
permanently off device off
fast blinking
(period 1s, Ton 0,5s)
Net search / Not
registered / turning
off
slow blinking
(period 3s, Ton 0,3s)
Registered full
service
permanently on a call is active
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Tri Band GPRS Data Terminal System Rev.1
1.11.13 Automatic answer (Voice, Data or FAX)
After n (depends of settings) rings automatically answers with beep (see S0 param).
1.11.14 Supplementary services (SS)
• Call Barring,
• Call Forwarding,
• Calling Line Identification Presentation (CLIP),
• Calling Line Identification Restriction (CLIR),
• Call Waiting, other party call Waiting Indication,
• Call Hold, other party Hold / Retrieved Indication,
• Closed User Group supplementary service (CUG),
• Advice of Charge,
• Unstructured SS Mobile Originated (MO)
1.11.15 Acoustic signaling
The acoustic signalling of Telit GM862-PCS module on the selected acoustic device are the
following:
• Call waiting;
• Ringing tone;
• SMS received tone;
• Busy tone;
• Power on/off tone;
• Off Hook dial tone;
• Congestion tone;
• Connected tone;
• Call dropped;
• No service tone;
• Alarm tone.
1.11.16 DTMF tones
DTMF tones managed by specific AT commands.
These tones are generated with AT commands only during voice calls.
The minimum duration of a DTMF tone is 100 ms.
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Tri Band GPRS Data Terminal System Rev.1
Group high
Group low 1209 Hz 1336 Hz 1477 Hz
697 Hz 1 2 3
770 Hz 4 5 6
852 Hz 7 8 9
941 Hz * 0 #
1.11.17 Buzzer output
The General Purpose I/O pin GPIO7 can be configured to output the BUZZER output signal, with
only an external Mosfet/transistor and a diode a Buzzer can be directly driven.
The ringing tone and the other signaling tones can be redirected to this Buzzer output with a
specific AT command.
1.12 EMC
Compliant to & ETS 300–342–1 and all applicable GSM Specifications.
Compliant to Directive 1999/05/CE.
1.13 Logic level specifications
Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels.
The following table shows the logic level specifications used in the Telit GM862-PCS module
interface circuits:
Absolute Maximum Ratings -Not Functional
Parameter Min Max
Input level on any
digital pin when on -0.3V +3.75V
Input voltage on
analog pins when on -0.3V +3.0 V
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Tri Band GPRS Data Terminal System Rev.1
Operating Range - Interface levels (2.8V CMOS)
Level Min Max
Input high level 2.1V 3.3V
Input low level 0V 0.5V
Output high level 2.2V 3.0V
Output low level 0V 0.35V
For 2,0V signals:
Operating Range - Interface levels (2.0V CMOS)
Level Min Max
Input high level 1.6V 3.3V
Input low level 0V 0.4V
Output high level 1,65V 2.2V
Output low level 0V 0.35V
1.13.1 Reset signal
Signal Function I/O Pin
RESET Phone reset I/O 23 (connector SO301)
RESET is used to reset the Telit GM862-PCS module. Whenever this signal is pulled low, the
GM862 is reset. When the device is reset it stops any operation and after the release of the reset it
shuts down, without doing any detach operation from the network where it is registered to. This
behavior is not a proper shut down because any GSM device is requested to issue a detach request
on turn off. For this reason the Reset signal must not be used to normally shutting down the device,
but only as an emergency exit in the rare case the device remains stucked waiting for some network
response.
The RESET is internally controlled on start-up to achieve always a proper power-on reset sequence,
so there's no need to control this pin on start-up. It may only be used to reset a device already on
that is not responding to any command.
NOTE: do not use this signal to power off the Telit GM862-PCS module. Use the ON/OFF
signal (Pin 17 of SO301) to perform this function or the AT#SHDN command.
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Tri Band GPRS Data Terminal System Rev.1
Reset Signal Operating levels:
Signal Min Max
RESET Input high 2.2V* 3.3V
RESET Input low 0V 0.2V
* this signal is internally pulled up so the pin can be left floating if not used.
If unused, this signal may be left unconnected. If used, then it must always be connected with an
open collector transistor, to permit to the internal circuitry the power on reset and undervoltage
lockout functions.
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1.14 Audio levels specifications
The audio of the Telit GM862-PCS, module is organised into two main paths:
- internal path (called also MT)
- external path (called also HF)
These two paths are meant respectively for handset and headset/handsfree use.
The Telit GM862-PCS module has a built in echo canceller and a noise suppressor, tuned separately
for the two audio paths; for the internal path the echo canceller parameters are suited to cancel the
echo generated by a handset, while for the external audio path they are suited for a handsfree use.
For more information on the audio refer to the Hardware User Guide.
The following table reports all the audio level specifications.
Microphone characteristics
Internal audio mic. input External audio mic. input
Line coupling AC ( 100nF cond.) AC ( 100nF cond.)
Line type Balanced Balanced
Differential input resistance 25kΩ25kΩ
Line nominal sensitivity 50mVrms 3mVrms
Max input voltage 360mVrms 22mVrms
Microphone nominal sensitivity
- Analog Gain suggested -45dBVrms/Pa / +24dB -45dBVrms/Pa / +10dB
Echo canceller type Handset Car kit hands free
Speaker characteristics
Internal audio ear. output External audio ear. output
Line coupling DC DC
Line type Bridged Bridged
Speaker impedance ≥ 16Ω ± 5% @ 1kHz ≥ 16Ω ± 5% @ 1kHz
Minimun load impedance 15Ω15Ω
Signal bandwidth 150-8000 Hz @ -3dB 150-8000 Hz @ -3dB
Maximum output 1700mVrms 850mVrms
Maximum power output 30mW 7.5mW
Volume level steps (SW) -2dB -2dB
Number of volume steps (SW) 10 10
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Tri Band GPRS Data Terminal System Rev.1
1.15 Interface connectors on GM862-PCS
The Telit GM862-PCS module has two interface connectors and a SIM Card reader:
1) SO601: Antenna connector (see 1.7.1, Antenna connector)
2) SO301: Interface connector
3) SO402: SIM Card Reader
The GM862-PCS transceiver module interface connector SO301 is a CSTP 50 pin vertical SMD
Molex 52991–0508 (male). Its pin-out (down view) is:
49 50
1 2
Connector Position
and PIN-Out order
Antenna connector
position(on the
vertical side)
SIM CARD reader
position (on the
vertical side)
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Tri Band GPRS Data Terminal System Rev.1
Molex 52991-0508 (male) GM862-PCS Connector LAY-OUT
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Tri Band GPRS Data Terminal System Rev.1
Molex 52991-0508 (male) GM862-PCS Connector PIN-OUT
Pin Signal I/O Function Internal
Pull up
Type
1VBATT -Main power supply Power
2GND -Ground Power
3VBATT -Main power supply Power
4GND -Ground Power
5VBATT -Main power supply Power
6GND -Ground Power
7VBATT -Main power supply Power
8CHARGE AI Battery Charger Input (5) Power
9EAR_HF+ AO Handsfree ear output, phase + Audio
10 EAR_MT- AO Handset earphone signal output, phase - Audio
11 EAR_HF- AO Handsfree ear output, phase - Audio
12 EAR_MT+ AO Handset earphone signal output, phase + Audio
13 MIC_HF- AI Handsfree microphone input; phase -,
nominal level 3mVrms Audio
14 MIC_MT+ AI Handset microphone signal input; phase+,
nominal level 50mVrms Audio
15 MIC_HF+ AI Handsfree microphone input; phase +,
nominal level 3mVrms Audio
16 MIC_MT- AI Handset microphone signal input; phase-,
nominal level 50mVrms Audio
17 ON/OFF IInput command for switching power ON or
OFF (toggle command). The pulse to be
sent to the GM862 must be equal or greater
than 1 second.
10KΩCMOS 2.8V
18 AXE IHandsfree switching 47KΩ2.0V signal
19 SIMIO I/O External SIM signal - Data I/O 3V ONLY
20 C103/TXD ISerial data input (TXD) from DTE CMOS 2.8V
21 PWRCTL/
CAM_SYNC
OModule Status ON indication (Signal
output for power on/off control of external
devices) /
Camera interface on –PCS (4)
820ΩCMOS 2.8V
22 SIMVCC -External SIM signal – Power (3) 3V ONLY
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23 RESET IReset input 2KΩsee par.1.13.1
24 SIMRST OExternal SIM signal – Reset 3V ONLY
25 MON1_CAM I/O Camera Interface on –PCS (4) CMOS 2.8V
26 SIMCLK OExternal SIM signal – Clock 3V ONLY
27 CCIN I/O External SIM signal – Presence (active
low) 47KΩCMOS 2.8V
28 GPIO2 OGeneral purpose output (Open Collector) /
Camera Interface on –PCS (4)
Open Collector
29 C106/CTS OOutput for Clear to send signal (CTS) to
DTE CMOS 2.8V
30 C125/RING OOutput for Ring indicator signal (RI) to
DTE CMOS 2.8V
31 GPIO1 IGeneral purpose input transistor base
32 PD[0] I/O Camera Interface on –PCS (4) CMOS 2.8V
33 C107/DSR OOutput for Data set ready signal (DSR) to
DTE CMOS 2.8V
34 PD[1] I/O Camera Interface on –PCS (4) CMOS 2.8V
35 EMMI TX OTX Data for debug monitor (1) CMOS 2.8V
36 C109/DCD OOutput for Data carrier detect signal (DCD)
to DTE CMOS 2.8V
37 C104/RXD OSerial data output to DTE CMOS 2.8V
38 PD[2] I/O Camera Interface on –PCS (4) CMOS 2.8V
39 STAT_LED OStatus indicator led Open Collector
40 PD[3] I/O Camera Interface on –PCS (4) CMOS 2.8V
41 EMMI RX IRX Data for debug monitor (1) CMOS 2.8V
42 PD[4] I/O Camera Interface on –PCS (4) CMOS 2.8V
43 C108/DTR IInput for Data terminal ready signal (DTR)
from DTE (4) CMOS 2.8V
44 PD[5] I/O Camera Interface on -PCS (4) CMOS 2.8V
45 C105/RTS IInput for Request to send signal (RTS)
from DTE CMOS 2.8V
46 GPIO3 /
PD[6]
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
47 GPIO4
IICSDA
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
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48 GPIO5
CAM_DRDY
I/O Configurable general purpose I/O pin /
Camera Interface on -PCS (4)
CMOS 2.8V
49 GPIO6
/ALARM
/PD[7]
I/O GP I/O pin or ALARM output pin /
Camera Interface on -PCS (4)
CMOS 2.8V
50 GPIO7
/BUZZER
/CAM_PWR_ON
I/O GP I/O pin or BUZZER output pin /
Camera Interface on -PCS (4)
CMOS 2.8V
(1) For the exclusive use of the Technical Support Service
(2) An earphone with a 150 ohm impedance can be directly connected to EAR+ and EAR–
(3) On this pin a maximum of 47nF bypass capacitor is allowed.
(4) When activating the Easy camera these pins will not be available for other use
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1.16 Mounting the GM862-PCS on your Board
In order to electrically connect your board to the Telit GM862-PCS module, use a CSTP 2x25 pin
vertical SMD SCH–SCH Molex 53748 - 0504 (female, low profile) as a counterpart to the CSTP
50 pin vertical SMD Molex 52991–0508 (male) of your Telit GM862-PCS module.
When mounting the Telit GM862-PCS module on your board, take care of soldering the GM862-
PCS shielding reeds on a ground plane or signal.
NOTE: be very careful when connecting the Telit GM862-PCS module RF connector. The Telit
GM862-PCS module RF connector can be damaged if not connected with the proper antenna
RF connector. The minimum number of insertion cycles is recommended.
1.16.1 Antenna Coaxial cable fixing
The following constraints must be respected in the Telit GM862-PCS antenna cable connection:
- The fixing point of the coaxial cable must not be placed too close to the antenna connector,
leaving at least 30mm of flexible cable between the fixed point and the plug end.
- The fixing point must be at the same height of the antenna connector, eventually using a wedge
between the PCB and the cable if it is directly fixed to the PCB.
- The flexible cable must never be bent with a radius lower than 25mm (RG174 cable).
- The cable must be a RG174 type or more flexible ones.
The following pictures explain these constraints:
- Angle connector fixing example -
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Tri Band GPRS Data Terminal System Rev.1
- Angle connector fixing example 2 -
NOTE: in the examples the cable is always bent, this is not a constrain. If the installation does
not require it, then the cable can be kept straight, ensuring that the fixing is without sliding.
1.16.2 Precautions
- The plug should be inserted in the connector only after the installation of the Telit GM862-PCS
module in the board. This is to prevent accidental breaking of the antenna connection during the
transport.
- The coaxial cable must be fixed at least in one point, without sliding possibilities.
- The plug insertion/removal must be done axially with the female connector of the GM862-PCS,
keeping lateral strains to a minimum.
- The insertion/crimping pull out force must be less than 15N.
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Tri Band GPRS Data Terminal System Rev.1
2 AT Command
The Telit GM862-PCS module can be driven via the serial interface using the standard AT
commands1. The Telit GM862-PCS module is compliant with:
1. Hayes standard AT command set, in order to maintain the compatibility with existing SW
programs.
2. ETSI GSM 07.07 specific AT command and PCS specific commands.
3. ETSI GSM 07.05 specific AT commands for SMS (Short Message Service) and CBS (Cell
Broadcast Service)
4. FAX Class 1 compatible commands
Moreover the Telit GM862-PCS module supports also Telit proprietary AT commands for special
purposes.
In the following the dedicated description of how to use the AT commands with the Telit GM862-
PCS module.
2.1 Definitions
The following syntactical definitions apply:
<CR> Carriage return character, is the command line and result code terminator character, which
value, in decimal ASCII between 0 and 255,is specified within parameter S3.
The default value is 13.
<LF> Linefeed character, is the character recognised as line feed character. Its value, in decimal
ASCII between 0 and 255, is specified within parameter S4. The default value is 10.
The line feed character is output after carriage return character if verbose result codes are used (V1
option used ) otherwise, if numeric format result codes are used (V0 option used) it will not appear
in the result codes.
<...> Name enclosed in angle brackets is a syntactical element. They do not appear in the
command line.
[...] Optional subparameter of a command or an optional part of TA information response
is enclosed in square brackets. Brackets themselves do not appear in the command line. When
subparameter is not given in AT commands which have a read command, new value equals to its
previous value. In AT commands which do not store the values of any of their subparameters, and
so have not a read command, which are called action type commands, action should be done on the
basis of the recommended default setting of the subparameter.
1 The AT is an ATTENTION command and is used as a prefix to other parameters in a string. The
AT command combined with other parameters can be set up in the communications package or
typed in manually as a command line instruction.
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2.2 AT Command Syntax
GSM commands use syntax rules of extended commands.
Every extended command has a test command (trailing =?) to test the existence of the command
and to give information about the type of its subparameters. There are two types of extended
command:
- Parameter type commands which also have a read command (trailing ?) to check the current
values of subparameters.
- Action type commands do not store the values of any of their possible subparameters, and
therefore do not have a read command.
2.2.1 Command lines
The basic structure of the command lines are:
• ATCMD1<CR> where AT is the command line prefix, CMD1 is a basic command (i.e. it have
not + prefix) and CR is the command line terminator character
• ATCMD2=10<CR> where 10 is a subparameter
• AT+CMD1;+CMD2=, ,10<CR> These are two examples of extended commands (which have a
+ prefix). They are delimited with semicolon. In the second command the subparameter is
omitted
• +CMD1?<CR> This is a read command for checking current subparameter values
• +CMD1=?<CR> This is a test command for checking possible subparameter values
These commands might be performed in a single command line as shown below:
ATCMD1 CMD2=10+CMD1;+CMD2=, ,10;+CMD1?;+CMD1=?<CR>
anyway it is always preferable to separate into different command lines the basic commands (i.e.
without + prefix) and the extended commands (the ones with + prefix); furthermore it is suggested
to avoid placing several action commands in the same command line, because if one of them fails,
then an error message is received but it is not possible to argue which one of them has failed the
execution.
If command V1 is enabled (verbose responses codes) and all commands in a command line has
been performed successfully, result code <CR><LF>OK<CR><LF> is sent from the TA to the TE,
if subparameter values of a command are not accepted by the TA or command itself is invalid, or
command cannot be performed for some reason, result code <CR><LF>ERROR<CR><LF> is sent
and no subsequent commands in the command line are processed.
If command V0 is enabled (numeric responses codes), and all commands in a command line has
been performed successfully, result code 0<CR> is sent from the TA to the TE, if sub-parameter
values of a command are not accepted by the TA or command itself is invalid, or command cannot
be performed for some reason, result code 4<CR> and no subsequent commands in the command
line are processed.
In case of errors depending on ME operation, ERROR (or 4) response may be replaced by +CME
ERROR: <err> or +CMS ERROR: <err>.
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2.2.2 Information responses and result codes
The TA response, in case of verbose response format enabled, for the previous examples command
line could be as shown below:
information response to +CMD1? <CR><LF>+CMD1:2,1,10<CR><LF>
information response to +CMD1=? <CR><LF>+CMD1(0-2),(0,1),(0-15)<CR><LF>
final result code <CR><LF>OK<CR><LF>
Moreover there are other two types of result codes:
• result codes that inform about progress of TA operation (e.g. connection establishment
CONNECT)
• result codes that indicate occurrence of an event not directly associated with issuance of a
command from TE (e.g. ring indication RING).
Here the basic result codes according to ITU-T V25Ter recommendation
Result Codes
Numeric form Verbose form
0OK
1CONNECT
2RING
3NO CARRIER
4ERROR
6NO DIALTONE
7BUSY
8NO ANSWER
2.2.3 Command Response Timeout
Every command issued to the Telit GM862-PCS module returns a result response if response codes
are enabled (default). The time needed to process the given command and return the response varies
from command to command and may depend also from the network on which the command may
interact. As a result every command is provided with a proper timeout time, if this time elapses
without any result from the operation, then an ERROR response can be reported as if the operation
was not successful and the operation is anyway terminated.
The timeout time is quite short for commands that imply only internal set up commands, but may be
very long for command that interact with the network (or even a set of Networks).
The default timeout is 100 ms for all the commands that have no interaction with the network or
upper software layers.
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In the table below are listed all the commands whose timeout differs from the default 100 ms and
their effective timeout is reported:
Command Timeout (Seconds)
+CBST 0.2
+CR 0.2
+CRC 0.2
+CRLP 0.2
+CSCS 0.2
+CEER 5
+CGMI 5
+CGMM 5
+CGMR 5
+CGSN 20
+CIMI 20
+CNUM 20
+CREG 5
+COPS 180
+CLCK 180
+CPWD 180
+CLIP 180
+CLIR 180
+CCFC 180
+CCWA 20
+CHLD 20
+CUSD 180
+CAOC 20
+CSSN 20
+CLCC 20
+CPAS 5
+CPIN 20
+CSQ 5
+CPBS 5
+CPBR 20
+CPBF 20
+CPBW 20
+CALM 5
+CRSL 5
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+CLVL 5
+CMUT 5
+CACM 20
+CAMM 20
+CPUC 20
+CMEE 5
+VTS 20
+GMI 5
+GMM 5
+GMR 5
+GSN 20
I3 5
I4 5
I5 5
+CSMS 5
+CPMS 5
+CMGF 5
+CSCA 20
+CSMP 5
+CSDH 5
+CSAS 5
+CRES 5
+CNMI 5
+CMGS 180 / 5 for prompt">"
+CMSS 180
+CMGW 5 / 5 for prompt">"
+CMGD 5
+CMGR 5
+CMGL 5
#CAP 10
#SRS 10
#SRP 10
#STM 10
#PCT 10
#SHDN 10
#QTEMP 10
#SGPO 10
#GGPI 10
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#MONI 10
+CGACT 180
+CGATT 180
+CGDATA 20
+CGDCONT 20
+CGPADDR 20
+CGQMIN 20
+CGQREQ 20
2.2.4 Command issuing timing
The chain Command -> Response shall always be respected and a new command must not be
issued before the GM862-PCS has terminated all the sending of its response result code (whatever it
may be).
This applies especially to applications that "sense" the OK text and therefore may send the next
command before the complete code <CR><LF>OK<CR><LF> is sent by the GM862-PCS.
It is advisable anyway to wait for at least 20ms between the end of the reception of the response and
the issue of the next AT command.
If the response codes are disabled and therefore the module does not report any response to the
command, then at least the 20ms pause time shall be respected.
During command mode, due to hardware limitations, under severe CPU load the serial port can
loose some characters if placed in autobauding at high speeds. Therefore if you encounter this
problem fix the baud rate with AT+IPR command.
2.2.5 Factory Profile and parameters stored in the profile
The GM862-PCS stores several command configurations in the internal non volatile memory (see
command &W), allowing to remember this status even after power off.
The parameters that are stored in the profile and their are:
GSM DATA MODE : +CBST: 0,0,1
AUTOBAUD : +IPR: 0
COMMAND ECHO : E1
RESULT MESSAGES : Q1
VERBOSE MESSAGES : V1
EXTENDED MESSAGES : X1
FLOW CONTROL OPTIONS : &K3
CTS (C106) OPTIONS : &B2
DSR (C107) OPTIONS : &S3
DTR (C108) OPTIONS : &D0
DCD (C109) OPTIONS : &C1
RI (C125) OPTIONS : \R1
C108/1 OPERATION : &D4
POWER SAVING : +CFUN: 1
DEFAULT PROFILE : &Y0
S REGISTERS: S0=0;S1=0;S2=43;S3=13;S4=10;S5=8;S7=60;S12=50;S25=5;S38=20
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Tri Band GPRS Data Terminal System Rev.1
2.3 Command Availability Table
The available command, depending on the module are evidenced in the following table:
PRODUCT
COMMAND GM862-PCS GM862-GPRS GM862-GSM
&F •••
Z•••
+FCLASS •••
&Y •••
&W •••
&Z •••
&N •••
+GMI •••
+GMM •••
+GMR •••
+GCAP •••
+GSN •••
&V •••
&V0 •••
&V1 •••
&V2 •••
\V •••
%L •••
%Q •••
E•••
Q•••
V•••
X•••
I•••
&C •••
&D •••
&K •••
&S •••
\R •••
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Tri Band GPRS Data Terminal System Rev.1
+IPR •••
+IFC •••
+ILRR •••
+ICF •••
D•••
T•••
P•••
A•••
H•••
O•••
&G •••
&P •••
+MS •••
%E •••
+DS •••
+DR •••
\B •••
\K •••
S0 •••
S1 •••
S2 •••
S3 •••
S4 •••
S5 •••
S7 •••
S10 •••
S12 •••
S25 •••
S30 •••
S38 •••
ETSI GSM 07.07 AT COMMANDS
+CGMI •••
+CGMM •••
+CGMR •••
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Tri Band GPRS Data Terminal System Rev.1
+CGSN •••
+CSCS •••
+CIMI •••
+CBST •••
+CRLP •••
+CR •••
+CEER •••
+CRC •••
+CNUM •••
+CREG •••
+COPS •••
+CLCK •••
+CPWD •••
+CLIP •••
+CLIR •••
+CCFC •••
+CCWA •••
+CHLD •••
+CUSD •••
+CAOC •••
+CLCC •••
+CSSN •••
+CCUG •••
+CPAS •••
+CFUN •••
+CPIN •••
+CSQ •••
+CPBS •••
+CPBR •••
+CPBF •••
+CPBW •••
+CCLK •••
+CALA •••
+CALM •••
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Tri Band GPRS Data Terminal System Rev.1
+CRSL •••
+CLVL •••
+CMUT •••
+CACM •••
+CAMM •••
+CPUC •••
+CMEE •••
+VTS •••
+CGACT • •
+CGATT • •
+CGDATA • •
+CGDCONT • •
+CGPADDR • •
+CGREG • •
+CGQMIN • •
+CGQREQ • •
+CBC •
ETSI GSM 07.05 AT COMMANDS
+CSMS •••
+CPMS •••
+CMGF •••
+CSMP •••
+CSDH •••
+CSAS •••
+CRES •••
+CSCB •••
+CSCA •••
+CNMI •••
+CMGL •••
+CMGR •••
+CMGS •••
+CMSS •••
+CMGW •••
+CMGD •••
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Tri Band GPRS Data Terminal System Rev.1
CUSTOM AT COMMANDS
#CAP •••
#SRS •••
#SRP •••
#STM •••
#PCT •••
#SHDN •••
#WAKE •••
#QTEMP •••
#SGPO •••
#GGPI •••
#GPIO •••
#MONI •••
#QSS •••
#ACAL •••
#SMOV •••
#SHFEC •••
#HFMICG •••
#HSMICG •••
#SHFSD •••
#/ •••
#BND •
FAX CLASS 1 AT COMMANDS
+FCLASS •••
+FMI •••
+FMM? •••
+FMR •••
+FTS •••
+FRS •••
+FTM •••
+FRM •••
+FTH •••
+FRH •••
+FLO •••
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TECHNICAL MANUAL
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Tri Band GPRS Data Terminal System Rev.1
+FPR •••
+FDD •••
EASY GPRS EXTENSION AT COMMANDS
#USERID • •
#PASSW • •
#PKTSZ • •
#DSTO • •
#SKTTO • •
#SKTSET • •
#SKTOP • •
#QDNS • •
#SKTSAV • •
#SKTRST • •
EASY CAMERA EXTENSION AT COMMANDS
#CAMON •
#CAMOFF •
#TPHOTO •
#RPHOTO •
#CSQUAL •
#CSMODE •
Page 39 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4 Hayes Compliant AT Commands
2.4.1 Generic Modem Control
2.4.1.1 &F - restore factory configuration
&F – restore factory configuration
Execute command
AT&F Calls the factory configuration, resetting the default profile.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
2.4.1.2 Z - soft reset
Z – soft reset
Execute command
ATZ <n> Send a software reset to device, loading on the configuration the specified
default profile.
Parameter: <n > = 0…1 - profile
Note: Must be the last command on the line.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
Page 40 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.3 +FCLASS - select active service class
+FCLASS - select active service class
Execute command
Read command
AT+FCLASS? Returns the current configuration value of the parameter <n>.
Write command
AT+FCLASS= <n> Set the GM862-PCS in specified connection mode (data, fax, voice), hence
all the calls done after, will be data or voice.
Parameter:
<n>: 0 = data
<n>: 1 = fax class 1
<n>: 8 = voice
Test command
AT+FCLASS=? Returns all supported values of the parameters <n>.
Example
Reference GSM 07.07
SW release Version A
2.4.1.4 &Y - designate a default reset profile
&Y – designate a default reset profile
Execute command
AT&Y <n> The GM862-PCS is able to store 2 complete configurations (see command
&W). The command &Y defines which one of the 2 profiles will be the
default profile to be loaded on startup.
Parameter: <n> = 0…1 - profile
Note: Differently from ATZ<n> command which simply loads the desired
profile , with the command AT&Y the chosen profile becomes the one
which will be loaded on every startup.
Read command
Write command
Test command
Example
Reference
SW release Version A
Page 41 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.5 &W - store current configuration
&W – store current configuration
Execute command
AT&W <n> Stores on profile n the complete configuration of the device.
Parameter: <n> = 0…1 - profile
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.1.6 &Z - store telephone number in the Telit GM862-PCS module internal
phonebook
&Z – store telephone number in the GM862-PCS internal phonebook
Execute command
AT&Z <n> = <nr> The GM862-PCS has a built in non volatile memory in which telephone
numbers of a maximum 24 digits can be stored. The command AT&Z <n> =
<nr> stores in the record n the telephone number nr. The records cannot be
overwritten, they must be cleared before rewriting.
Parameter:
<n>: phonebook record <nr>: telephone number
Note1: To delete the record <n> the command AT&Z<n>= must be issued.
Note2: The records in the GM862-PCS memory can be viewed with the
command AT&N, while the telephone number stored in the record n can be
dialled by giving the command ATDS=<n>.
Read command
Write command
Test command
Example
Reference
SW release Version A
Page 42 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.7 &N - display internal phonebook stored numbers
&N – display internal phonebook stored numbers
Execute command
AT&N <n> Returns the telephone number stored in the internal memory at the record
number <n>.
Parameter: <n> - phonebook record
Note: if parameter <n> is omitted then all the internal records are shown.
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.1.8 +GMI - request manufacturer identification
+GMI – request manufacturer identification
Execute command
AT+GMI Returns the manufacturer identification.
Read command
Write command
Test command
Example
Reference V.25ter
SW release Version A
2.4.1.9 +GMM - request model identification
+GMM – request model identification
Execute command
AT+GMM Returns the model identification.
Read command
Write command
Test command
Example
Reference V.25ter
SW release Version A
Page 43 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.10 +GMR - request revision identification
+GMR – request revision identification
Execute command
AT+GMR Returns the software revision identification.
Read command
Write command
Test command
Example
Reference V.25ter
SW release Version A
2.4.1.11 +GCAP - request capabilities list
+GCAP – request capabilities list
Execute command
AT+GCAP Returns the equipment supported command set list.
Read command
Write command
Test command
Example
Reference V.25ter
SW release Version A
2.4.1.12 +GSN - request serial number
+GSN – request serial number
Execute command
AT+GSN Returns the device board serial number.
Note: The number returned is not the IMSI, it is only the board number
Read command
Write command
Test command
Example
Reference V.25ter
SW release Version A
Page 44 of 187
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.13 &V - display current configuration & profile
&V – display current configuration & profile
Execute command
AT&V Returns all the configuration parameters settings.
Read command
Write command
Test command
Example AT&V
DTE SPEED : 19200
DTE FORMAT : 8N1
CELLULAR PHONE : GSM TELIT: Operative
GSM DATA MODE : \N4=Not Trasparent
AUTOBAUD : +IPR0=YES
COMMAND ECHO : E1=YES
RESULT MESSAGES : Q0=YES
VERBOSE MESSAGES : V1=YES
EXTENDED MESSAGES : X1=YES
ECM TYPE MESSAGES : \V0=NO
LINE SPEED : F8=9600
CONSTANT DTE SPEED : \J0=YES
FLOW CONTROL OPTIONS : &K3=HW bidirect.
ERROR CORRECTION MODE : \N4=RLP
CTS (C106) OPTIONS : &B2=OFF while disc.
DSR (C107) OPTIONS : &S3=PHONE ready->ON
DTR (C108) OPTIONS : &D0=ignored
DCD (C109) OPTIONS : &C1=follows carrier
RI (C125) OPTIONS : \R1=OFF dur. off-hk
C108/1 OPERATION : &D4=NO
POWER SAVING ON DTR : +CFUN:1=NO
CALL ABORT : YES
DEFAULT PROFILE : &Y0=user profile 1
OK
Reference V25ter
SW release Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.14 &V0 - display current configuration & profile
&V0 – display current configuration & profile
Execute command
AT&V0 Returns all the configuration parameters settings.
Note: this command is the same as &V, it is included only for
backwards compatibility.
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.1.15 &V1 - display S registers values
&V1 – display S registers values
Execute command
AT&V1 Returns the value of the S registers in decimal and hexadecimal value in the
format:
REG DEC HEX
<reg> <dec> <hex>
where
<reg> - S register number (0 .. 52)
<dec> - current value in decimal notation
<hex> - current value in hexadecimal notation
Read command
Write command
Test command
Example
Reference
SW release Version A
Page 46 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.16 &V2 - display last connection statistics
&V2 – display last connection statistics
Execute command
AT&V2 Returns the last connection statistics & connection failure reason.
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.1.17 \V - single line connect message
\V – Single line connect message
Execute command
AT\V <n> Set single line connect message.
Parameter:
<n> = 0 - off
<n> = 1 on
Read command
Write command
Test command
Example
Reference
SW release Version A
Page 47 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.1.18 %L - report line signal level
%L – report line signal level
Execute command
AT%L Reports the line signal level.
Note: Since on mobile phone there's no line connection, command is
included only for compatibility and returns only OK.
To check signal strength (level) use the +CSQ command.
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.1.19 %Q - report line quality
%Q – report line quality
Execute command
AT%Q Reports the line quality indicator.
Note: Since on mobile phone there's no line connection, command is
included only for compatibility and returns only OK.
To check signal quality use the +CSQ command.
Read command
Write command
Test command
Example
Reference
SW release Version A
Page 48 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2 DTE - modem interface control
2.4.2.1 E - command echo
E – command echo
Execute command
Read command
Write command
ATE <n> Controls the command echo response of the device, enabling or disabling the
echo.
Parameter:
<n> = 0 - disables command echo, hence after this command the only
characters received by DTE are the responses to commands sent to device.
<n> = 1 - enables command echo (default) , hence command sent to the
device are echoed back to the DTE before the response is given.
Test command
Example
Reference V25ter
SW release Version A
2.4.2.2 Q - quiet resut codes
Q – quiet result codes
Execute command
Read command
Write command
ATQ <n> Enables or disables the result codes.
Parameter:
<n> = 0 - enables result codes
<n> = 1 - disables result codes
Note: After disabling result codes with ATQ1, the device does not return a
response to commands (usually OK), but command are executed anyway.
Test command
Example
Reference V25ter
SW release Version A
Page 49 of 187
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Tri Band GPRS Data Terminal System Rev.1
2.4.2.3 V- result code form
V – result code form
Execute command
Read command
Write command
ATV <n> Sets the result code format.
Parameter:
<n> = 0 set the short format (terse) return codes are numbers 0-9.
<n> = 1 set the long form (verbose) return codes.
Note: Line feed is not issued before a short format result code.
Test command
Example
Reference V25ter
SW release Version A
2.4.2.4 X - extended result codes
X – extended result codes
Execute command
Read command
Write command
ATX <n> Selects the result code messages subset used by the modem to inform the
DTE of the result of the commands.
Parameter:
<n> = 0 - send only OK, CONNECT, RING, NO CARRIER, ERROR, NO
ANSWER results. Busy tones reporting is disabled.
<n> = 1,2,3,4 - reports all messages (default).
Test command
Note For complete control on CONNECT response message see also +DR
command.
Reference V25ter
SW release Version A
Page 50 of 187
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Tri Band GPRS Data Terminal System Rev.1
2.4.2.5 I - Request identifier and software checksum
I – request identifier and software checksum
Execute command
Read command
Write command
ATI <n> Returns the identifier and a software checksum.
Parameter:
<n> = 0 numerical identifier.
<n> = 1 GM862-PCS checksum
<n> = 2 checksum check result
<n> = 3 manufacturer, software product code
<n> = 4 product name
<n> = 5 DOB version
Test command
Example
Reference V25ter
SW release Version A
2.4.2.6 &C - data carrier detect (DCD) control
&C – Data carrier detect (DCD) control
Execute command
Read command
Write command
AT&C <n> Controls the RS232 DCD output behaviour.
Parameter:
<n> = 0 DCD remains high always.
<n> = 1 DCD follows the Carrier detect status: if carrier is detected DCD is
high, otherwise DCD is low. (default)
Test command
Example
Reference V25ter
SW release Version A
Page 51 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.7 &D - data terminal ready (DTR) control
&D – data terminal ready (DTR) control
Execute command
Read command
Write command
AT&D <n> Controls the GM862-PCS behaviour to the RS232 DTR transitions.
Parameter:
<n> = 0 DTR transitions are ignored.
<n> = 1 when the GM862-PCS is connected, the high to low transition of
DTR pin sets the device in command mode, the current connection is NOT
closed.
<n> = 2 when the GM862-PCS is connected , the high to low transition of
DTR pin sets the device in command mode and the current connection is
closed.
Note: if AT&D2 command is issued, the device does not answer to incoming
calls if DTR is low, even if ATA command is given.
Test command
Example
Reference V25ter
SW release Version A
2.4.2.8 &K - flow control
&K – flow control
Execute command
Read command
Write command
AT&K <n>
Controls the RS232 flow control behaviour.
Parameter.
<n> = 0 – disabled
<n> = 1 - only CTS active, Hardware mono-directional
<n> = 2 - XON/XOFF software mono direction
<n> = 3 - RTS/CTS active, Hardware bi-directional (default)
<n> = 4 - XON/XOFF, Software bi-directional with filtering
<n> = 5 - XON/XOFF, Software bi-directional without filtering (Pass
Through)
<n> = 6 - RTS/CTS active, Hardware bi-directional & software
XON/XOFF (bi-directional) with filtering
Test command
Example
Reference
SW release Version A
Page 52 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.9 &S - data set ready (DSR) control
&S – data set ready (DSR) control
Execute command
Read command
Write command
AT&S <n> Controls the RS232 DSR pin behaviour:
n = 0 - always ON
n = 1 - follows the GSM traffic channel indication.
n = 2 - ON when connected
n = 3 - ON when device is ready to receive commands
Note: if option 1 is selected then DSR is tied up when the device receives
from the network the GSM traffic channel indication.
Test command
Example
Reference V25ter
SW release Version A
Page 53 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.10 \R - ring (RI) control
\R – ring (RI) control
Execute command
Read command
Write command
AT\R <n> controls the RING output pin behaviour.
Parameter:
<n> = 0 - RING on during ringing and further connection
<n> = 1 – RING on during ringing
<n> = 2 - RING follows the ring signal
Note: to check the ring option status use the &V command.
Test command
Example
Reference
SW release Version A
2.4.2.11 +IPR - fixed DTE interface rate
+IPR – fixed DTE interface rate
Execute command
Read command
AT+IPR? Returns the current value of +IPR parameter.
Write command
AT+IPR = <rate> Specifies the DTE speed at which the device accepts commands
during command mode operation, it may be used to fix the DTE-
DCE interface speed.
Parameter:
<rate> = 0/300/1200/2400/4800/9600/19200/38400/57600/115200
If <rate> is unspecified or set to 0, then automatic speed detection is enabled
and also character format (see +ICF) is set to auto-detect.
If <rate> is specified and not 0, DTE-DCE speed is fixed at that
speed, hence no speed auto-detection (autobauding) is enabled.
Test command
AT+IPR=? Returns the supported serial port speed list.
Example
Reference V25ter
SW release Version A
Page 54 of 187
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.12 +IFC - DTE - DTA flow control
+IFC – DTE-DTA flow control
Execute command
Read command
AT+IFC? Returns active flow control settings.
Write command
AT+IFC = <by_te>, <by_ta>
Response
Selects the flow control behavior of the serial port in both
directions: from DTE to DTA (<by_ta> option) and from DTA to
DTE (<by_te>)
Parameter:
<by_te> - flow control option for the data received by DTE,
<by_ta> - flow control option for the data sent by DTA
<by_te> = 0 - flow control None
<by_te> = 1 - XON/XOFF filtered
<by_te> = 2 - C105 (RTS)
<by_te> = 3 - XON/XOFF not filtered
<by_ta> = 0 - flow control None
<by_ta> = 1 - XON/XOFF
<by_ta> = 2 - C106 (CTS)
Note: This command is equivalent to &K command.
Test command
AT+IFC=?
Response
Returns all supported values of the parameters <by_te> and
<by_ta>.
Example
Reference V25ter
SW release Version A
Page 55 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.13 +ILRR - DTE - modem rate reporting
+ILRR – DTE-modem rate reporting
Execute command
Read command
AT+ILRR? Returns active setting of port speed rate reporting information.
Write command
AT+ILRR = <n> Controls whether or not the +ILRR:<rate> information text is
transmitted from the GM862-PCS to the DTE.
Parameter:
<n> = 0 - local port speed rate reporting disabled
<n> = 1 - local port speed rate reporting enabled
Note: this information if enabled is sent upon connection.
Test command
AT+ILRR=? Returns all supported values of the parameter <n>
Example
Reference V25ter
SW release Version A
Page 56 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.14 +ICF - DTE - modem character format
+ICF – DTE-modem character format
Execute command
Read command
AT+ICF? Returns current value of the character format.
Write command
AT+ICF = <format>[,<parity>] Defines the asynchronous character format to be used when
autobauding is disabled.
Parameter:
<format> = 0..5, < parity> = 0/1
AT+ICF = 0 - auto detect
AT+ICF = 1 - 8N2
AT+ICF = 2,0 - 8O1
AT+ICF = 2,1 - 8E1
AT+ICF = 3 - 8N1
AT+ICF = 5,0 - 7O1
AT+ICF = 5,1 - 7E1
Note: the character format is defined as: number of bit per char,
parity bit and stop bit; where parity can be None, Odd and
Even. E.g. 8E1 means 8 bit per char with the even parity bit
and 1 stop bit.
Test command
AT+ICF=? Returns all supported values of the parameters <format> and
<parity>
Example
Reference V25ter
SW release Version A
Page 57 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.3 Call Control
2.4.3.1 D - dial
D – dial
Execute command
ATD <number>
Starts a call to the phone number given as parameter.
Parameter: <number> - phone number to be dialled
Note: The call is a data call or voice call depending on +FCLASS setting. If
AT+FCLASS=8 command was issued before calling then the call will be
done as a voice call, instead if AT+FCLASS=0 command was issued the call
will be a data one. The default value of +FCLASS is 0 hence calls are by
default data ones.
The numbers accepted are 0-9 and *,#,”A”, ”B”, ”C”, ”D”,”+”.
For backwards compatibility with landline modems modifiers “T”, ”P”, ”R”,
”,”, ”W”, “!”, “@” are accepted but have no effect.
ATD <number> ; Issues a VOICE call to the number given regardless of the current value of the
parameter +FCLASS, which remains unaffected.
Parameter: <number> - phone number to be dialled.
ATD <n> [;] Issues a call (VOICE if ";" modifier is added to the end of the command) to
the number stored in the GM862-PCS internal phonebook position number
<n>.
Parameter: <n> - internal phonebook position to be called
ATD> <n> [;] Issues a call (VOICE if ";" modifier is added to the end of the command) to
the number stored in the SIM phonebook in the record number <n>.
Parameter: <n> - SIM phonebook position to be called
ATDL Issues a call to the last number dialled.
ATDS=<nr> Issues a call to the internally stored number at the position <nr>. ( See
commands &N and &Z)
ATD<n> I [;] Issues a call [voice if ; is added] overwriting the CLIR setting in order to hide
the CLI to the called party for the current call only.
ATD<n> i [;] Issues a call [voice if ; is added] overwriting the CLIR setting in order to show
the CLI to the called party for the current call only.
ATD<n> G[;]
ATD<n>g[;]
Issues a call [voice if ; is added] checking the CUG supplementary service for
the current call. Refer to +CCUG command.
ATD*<gprs_sc>[*
<addr>]
[*[<L2P>][*[<cid
>]]]]#
This command is specific of GPRS functionality and causes the MT to
perform whatever actions are necessary to establish communication between
the TE and the external PDN.
Parameters:
<GPRS_SC> - (GPRS Service Code) a digit string (value 99) which identifies
a request to use the GPRS
<addr> - string that identifies the called party in the address space applicable
to the PDP.
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Tri Band GPRS Data Terminal System Rev.1
D – dial
<L2P>: a string which indicates the layer 2 protocol to be used (see
+CGDATA command). For communications software that does not support
arbitrary characters in the dial string, the following numeric equivalents shall
be used:
1 - PPP
Other values are reserved and will result in an ERROR response to the set
command.
<cid>: a digit string which specifies a particular PDP context definition (see
+CGDCONT command).
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.3.2 T - set tone dial
T – set tone dial
Execute command
ATT It has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
2.4.3.3 P - set pulse dial
P – set pulse dial
Execute command
ATP It has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
2.4.3.4 A - answer
A – answer
Execute command
ATA It is used to answer to an incoming call if automatic answer is disabled.
Note: This command MUST be the last in the command line and must be
followed immediately by a <CR> character.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.3.5 A/ - Last command automatic repetition
A/ – last command automatic repetition
Execute command
A/ It is used to execute again the last received command.
This command works only at fixed IPR.
Note: This command has been substituted with AT#/ command.
Refer to #/ command reference.
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.3.6 H - disconnect
H - disconnect
Execute command
ATH It is used to close the current conversation (voice, data or fax).
Note: When a data conversation is active the device is in on-line mode
commands are not sensed, instead characters are sent to the other
interlocutor. To issue this command you must be in command mode
operation, hence escape sequence (see register S2) may be required before
issuing this command, otherwise if &D1 option is active, DTR pin should be
tied low to return in the command mode.
When a voice call is active, no escape sequence is needed.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.3.7 O - return to On Line Mode
O – return to on line mode
Execute command
ATO It is used return to On-line mode from command mode. If there's no
connection active returns ERROR.
Note: After the issue of this command, if the device is in conversation, to
send other commands to the device you must return to command mode by
issuing the escape sequence or lowering DTR if &D1 option is active.
Read command
Write command
Test command
Example
Reference V25ter.
SW release Version A
2.4.3.8 &G - guard tone
&G – guard tone
Execute command
AT&G It is has no effect is included only for backward compatibility with landline
modems.
Read command
Write command
Test command
Example
Reference
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.3.9 &P - pulse dial make/break ratio
&P – pulse dial make/break ratio
Execute command
AT&P It is has no effect is included only for backward compatibility with landline
modems..
Read command
Write command
Test command
Example
Reference
SW release Version A
2.4.4 Modulation control
2.4.4.1 +MS - modulation control
+MS – modulation control
Execute command
Read command
Write command
AT+MS = <modulation>, <automode>,
<min_speed>, <max_speed> This command has no effect is included only for
backward compatibility with landline modems.
Parameter:
<modulation> =V21 / V22 / V22B / V23C / V32 / V34
<automode> = 0/1
<min_speed> = 0
<max_speed> = 300-14400
Note: to change modulation requested use +CBST
command.
Test command
Example
Reference
SW release Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.4.2 %E - enable/disable line quality monitor and auto retrain or fallback /
fallforward
%E – enable/disable line quality monitor and auto retrain or fallback/fallforward
Execute command
AT%E It has no effect is included only for backward
compatibility with landline modems.
Read command
Write command
Test command
Example
Reference
SW release Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.5 Compression control
2.4.5.1 +DS - set data compression
+DS – set data compression
Execute command
Read command
AT+DS? Returns current value of the data compression parameter.
Write command
AT+DS = <n> Sets the V42 compression parameter.
Parameter:
<n> = 0 - no compression
<n> = 1 - compression enabled
Note: The only value supported is 0 - no compression
Test command
AT+DS=? Returns all supported values of the parameter n
Example
Reference V25ter
SW release Version A
2.4.5.2 +DR - data compression reporting
+DR – data compression reporting
Execute command
Read command
Write command
AT+DR = <n> Controls the data compression reporting upon connection.
Parameter:
<n> = 0 no data compression reporting is displayed at the connection
<n> = 1 a data compression report message is sent by the device upon
connection
Test command
Example
Reference V25ter
SW release Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.6 Break control
2.4.6.1 \B - transmit break to remote
\B – transmit break to remote
Execute command
Read command
Write command
AT\B It has no effect is included only for backward compatibility with
landline modems
Test command
Example
Reference
SW release Version A
2.4.6.2 \K - break handling
\K – break handling
Execute command
Read command
Write command
AT\K<n>
Response
It has no effect is included only for backward compatibility with
landline modems
<n> = 1.. 5
Test command
Example
Reference
SW release Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.7 S parameters
2.4.7.1 S0 - number of rings to auto answer
S0 – number of rings to auto answer
Execute command
Read command
ATS0? Returns the current value of S0 parameter.
Write command
ATS0 = <n> Sets the number of rings required before device automatically
answers an incoming call.
Parameter:
<n> = 0-255
<n> = 0 auto answer disabled
Test command
Example
Reference V25ter
SW release Version A
2.4.7.2 S1 - ring counter
S1 – ring counter
Execute command
Read command
ATS1? S1 is incremented each time the device detects the ring signal of
an incoming call. S1is cleared if no ring occur over an eight
seconds interval.
This command returns the value of this parameter.
Write command
Test command
Example
Reference
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.7.3 S2 - escape character
S2 – escape character
Execute command
Read command
Write command
ATS2 = <char> S2 holds the decimal value of the ASCII character used as escape
character. This command sets this character equal to <char>.
Parameter: <char> - escape character 0-255
Note: The escape sequence consists of three escape characters
preceded by n ms of idle and followed by m ms of idle.
Test command
Example
Reference
SW release Version A
2.4.7.4 S3 - carriage return character
S3 – carriage return character
Execute command
Read command
Write command
ATS3 = <char> Sets the command line and result code terminator character in
decimal ASCII.
Parameter: <char> - carriage return character 0-127
Note: Default 13 (Carriage Return)
Test command
Example
Reference V25ter
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.7.5 S4 - line feed character
S4 – line feed character
Execute command
Read command
Write command
ATS4 = <char> Sets the character recognized as line feed character.
Parameter: <char> - line feed character 0-127
Note: Default 10 (Line Feed). The line feed character is output
after carriage return character if verbose result codes are used
( V1 option used ).
Test command
Example
Reference V25ter
SW release Version A
2.4.7.6 S5 - backspace character
S5 – backspace character
Execute command
Read command
Write command
ATS5 = <char> Sets the decimal ASCII character that is recognized as backspace
character.
Parameter: <char> - backspace character 1-127
Note: Default 8 ( backspace )
Test command
Example
Reference V25ter
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.7.7 S7 - wait time for carrier, silence or dial tone
S7 – wait time for carrier, silence or dial tone
Execute command
Read command
Write command
ATS7 = <sec> S7 sets the length of time in seconds that the device will wait for
carrier before hanging up the call. The timer is started when the
device finishes dialing (originate), or 2 seconds after going off-
hook.
Parameter: <sec> - 1-255
Note: Default is 60 seconds
Test command
Example
Reference V25ter
SW release Version A
2.4.7.8 S10 - lost carrier to hang up delay
S10 – lost carrier to hang up delay
Execute command
Read command
Write command
ATS10 = <time> S10 defines the maximum time allowed to a carrier loss before
disconnecting.
Parameter: <time> - tenth of seconds 1-255
Note: default is 50 (5 seconds).
Test command
Example
Reference V25ter
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.4.7.9 S12 - escape prompt delay
S12 – escape prompt delay
Execute command
Read command
Write command
ATS12 = <time> Defines the guard time of silence before and after the escape
sequence in order to accept it as a valid one.
Parameter: <time> - 20-255 fiftieth of seconds
Note: default is 50 (1 second )
Test command
Example
Reference
SW release Version A
2.4.7.10 S25 - delay to DTR off
S25 –delay to DTR off
Execute command
Read command
Write command
ATS25 = <time> Defines how long the DTR must be off to consider the high to
low transition as a valid one.
Parameter: <time> - 1-255 hundredth of seconds
Note: default is 5 ( 5 hundredth of second)
Test command
Example
Reference
SW release Version A
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TECHNICAL MANUAL
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Tri Band GPRS Data Terminal System Rev.1
2.4.7.11 S30 - disconnect inactivity timer
S30 –disconnect inactivity timer
Execute command
Read command
Write command
ATS30 = <min> Defines the inactivity timeout timer value in minutes. The Device
disconnects if no characters are exchanged for a time period of at
least S30 minutes.
Parameter:
<min> - 0-127 minutes
<min> = 0 - means inactivity timer disabled, hence no
disconnect on inactivity feature is enabled.
Note: Default is 0
Test command
Example
Reference
SW release Version A
2.4.7.12 S38 - delay before forced hang up
S38 –delay before forced hang up
Execute command
Read command
Write command
ATS38 = <sec> Defines the time in seconds that the device waits after a hang up
command for transmit buffer to be emptied. 255 value means that
disconnecting is done only after complete buffer upload.
Parameter: <sec> - 0-255 s
Note: Default is 20 s
Test command
Example
Reference
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5 ETSI GSM 07.07 AT Commands
2.5.1 General
2.5.1.1 +CGMI - request manufacturer identification
+CGMI – request manufacturer identification
Execute command
AT+CGMI Returns the device manufacturer identification code.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
2.5.1.2 +CGMM - request model identification
+CGMM – request model identification
Execute command
AT+CGMM Returns the device model identification code.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
2.5.1.3 +CGMR - request revision identification
+CGMR – request revision identification
Execute command
AT+CGMR Returns device software revision number.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.1.4 +CGSN - request product serial number identification
+CGSN – request product serial number identification
Execute command
AT+CGSN Returns the product serial number, identified as the IMEI of the
mobile.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
2.5.1.5 +CSCS - select TE character set
+CSCS – select TE character set
Execute command
Read command
AT+CSCS? Returns the current value of the active character set.
Write command
AT+CSCS <chset> Sets the current character set used by the device.
Parameter: <chset> = "IRA" - char set
Note: The only character set supported yet is the
ITU–T.50 ( IRA)
Test command
AT+CSCS=? Returns the supported values of the parameter chset. Yet only
IRA is supported.
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.1.6 +CIMI - request international mobile subscriber identity (IMSI)
+CIMI – request international mobile subscriber identify (IMSI)
Execute command
AT+CIMI Returns the value of the Internal Mobile Subscriber Identity
stored in the SIM.
Note: A SIM card must be present in the SIM card housing, else
the command returns ERROR.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.2 Call control
2.5.2.1 +CBST - select bearer service type
+CBST – select bearer service type
Execute command
Read command
AT+CBST? Returns current value of the parameters <speed>,<name> and <ce>
Write command
AT+CBST = <speed>,
<name>, <ce> Selects the bearer service <name> with data rate <speed>, and the
connection element <ce> to be used when data calls are originated.
Values may also be used during mobile terminated data call setup,
especially in case of single numbering scheme calls (refer +CSNS).
Parameters:
The default values of the subparameters are manufacturer specific since
they depend on the purpose of the device and data services provided by
it. Not all combinations of these subparameters are supported. The
supported values are:
<speed>
0 – autobauding (automatic selection of the speed)
1 - 300 bps (V.21)
2 - 1200 bps (V.22)
3 - 1200/75 bps (V.23)
4 - 2400 bps (V.22bis)
6 - 4800 bps (V.32)
7 - 9600 bps (V.32)
14 - 14400 bps (V.34)
65 - 300 bps (V.110)
66 - 1200 bps (V.110)
68 - 2400 bps (V.110 or X.31 flag stuffing)
70 - 4800 bps (V.110 or X.31 flag stuffing)
71 - 9600 bps (V.110 or X.31 flag stuffing)
75 - 14400 bps (V110 or X.31 flag stuffing)
<name>
0 - data circuit asynchronous
<ce>
0 – transparent
1 - non transparent
Default is +CBST = 7,0,1
Test command
AT+CBST=? Returns the supported range of values of the parameters.
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.2.2 +CRLP - radio link protocol
+CRLP – radio link protocol
Execute command
Read command
AT+CRLP? Returns the current value of the RLP protocol parameters.
Write command
AT+CRLP = <iws>,
<mws>, <T1>, <N2>,
<ver>
Radio link protocol (RLP) parameters used when non-transparent data
calls are originated may be altered with this command.
Parameters:
<iws> = 1...61 - IWF window Dimension
<mws> = 1...61 - MS window Dimension
<T1> = 39…255 – acknowledge timer (10 ms units).
<N2> = 1…255 – retransmission attempts
<ver> = 0 - protocol Version
The default values are: 61,61,78,6,0
Test command
AT+CRLP=? Returns supported range of values of the RLP protocol parameters.
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.2.3 +CR - service reporting control
+CR – service reporting control
Execute command
Read command
AT+CR? Returns current intermediate report setting
Write command
AT+CR = <mode> Controls whether or not intermediate result code +CR: <serv> is returned
from the TA to the TE. If enabled, the intermediate result code is
transmitted at the point during connect negotiation at which the TA has
determined which speed and quality of service will be used, before any
error control or data compression reports are transmitted, and before the
intermediate result code CONNECT is transmitted.
Parameter: <mode>
<mode> = 0 - disables intermediate result code report
<mode> = 1 - enables intermediate result code report
This command replaces V.25ter [14] command Modulation Reporting
Control +MR, which is not appropriate for use with a GSM terminal.
The result code parameter <serv> has the meaning:
ASYNC - asynchronous transparent
SYNC - synchronous transparent
REL ASYNC - asynchronous non-transparent
REL SYNC - synchronous non-transparent.
Test command
AT+CR=? Returns the supported range of values of the parameter <mode>.
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.2.4 +CEER - extended error report
+CEER – extended error report
Execute command
AT+CEER
Reports a information text regarding some error condition that may
occur:
- the failure in the last unsuccessful call setup (originating or answering)
- the last call release
- the last unsuccessful GPRS attach or unsuccessful PDP context
activation,
- the last GPRS detach or PDP context deactivation.
Note: if none of this condition has occurred since power up then No
Error condition is reported
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.2.5 +CRC - cellular result codes
+CRC – cellular result codes
Execute command
Read command
AT+CRC? Returns current value of the parameter <mode>.
Write command
AT+CRC = <mode> Controls whether or not the extended format of incoming call indication
is used. When enabled, an incoming call is indicated to the TE with
unsolicited result code +CRING:<type> instead of the normal RING.
Parameter:
<mode> = 0 - disables extended format reporting
<mode> = 1 - enables extended format reporting
Note: On +CRING indication <type> parameter is the call type:
<type> - call type:
ASYNC asynchronous transparent data
SYNC - synchronous transparent data
REL ASYNC - asynchronous non-transparent data
REL SYNC - synchronous non-transparent data
FAX - facsimile (TS 62)
VOICE - normal voice (TS 11)
Test command
AT+CRC=? Returns supported values of the parameter <mode>.
Example
Reference GSM 07.07
SW release Version A
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.3 Network service handling
2.5.3.1 +CNUM - subscriber number
+CNUM – subscriber number
Execute command
AT+CNUM Returns the subscriber number i.e. the phone number of the device that is
stored in the SIM card.
Note: the returned number format is:
+CNUM: [<alpha>] , <number> , <type>
<alpha> - optional alphanumeric string associated to <number>
<number> - string containing the phone number in the format <type>
<type>- type of number:
<type> = 145 - international numbering scheme (contains the
character "+")
<type> = 129 - national numbering scheme
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
Page 81 of 187
TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.3.2 +CREG - network registration report
+CREG – network registration report
Execute command
Read command
Write command
AT+CREG = <mode>
Enables/disables network registration reports depending on the parameter
mode.
Parameter:
<mode>
0 – disable network registration unsolicited result code
1 - enable network registration unsolicited result code
2 - enable network registration unsolicited result code with network
Cell identification data
If mode=1, network registration result code reports:
+CREG: <stat>
<stat> = 0 - not registered, ME is not currently searching a new
operator to register to
<stat> = 1 – registered, home network
<stat> = 2 - not registered, but ME is currently searching a new
operator to register to
<stat> = 3 - registration denied
<stat> = 4 -unknown
<stat> = 5 - registered, roaming
If mode=2, network registration result code reports:
+CREG: <stat>[,<Lac>,<Ci>]
where:
<Lac> is the Local Area Code for the currently registered on cell
<Ci> is the Cell Id for the currently registered on cell
Note: <Lac> and <Ci> are reported only if mode=2 and the mobile is
registered on some network cell.
Test command
AT+CREG? Reports the <mode> and <stat> parameter values in the format:
+CREG: <mode>,<stat>[,<Lac>,<Ci>]
Note: <Lac> and <Ci> are reported only if mode=2 and the mobile is
registered on some network cell.
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+CREG – network registration report
Example AT
OK
at+creg?
+CREG: 0,2 (the GM862-GPRS is in network searching state)
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,2
OK
at+creg?
+CREG: 0,1 (the GM862-GPRS is registered )
OK
at+creg?
+CREG: 0,1
OK
Reference GSM 07.07
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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.5.3.3 +COPS - operator selection
+COPS – operator selection
Execute command
Read command
AT+COPS? Returns current value of <mode>,<format> and <oper>
Write command
AT+COPS =
[<mode>[,<format>[,<oper>
]]]
Forces an attempt to register the GSM network operator, <mode>
parameter defines whether the operator selection is done
automatically or it is forced with <oper> parameter.
Parameters:
<mode> = 0 - automatic choice (the parameter <oper> will be
ignored)
<mode> = 1 - manual choice
<mode> = 3 - set only <format> parameter (the parameter <oper>
will be ignored)
<format> = 0 - alphanumeric max length 16 digits
<format> = 1 – alphanumeric short form
<format> = 2 - Numeric 5 digits [country code (3) + network code
(2)]
<oper>: network operator in the <format> parameter defined
format.
Note: if manual choice selection operator is not available no other
operators will be chosen for registration.
Test command
AT+COPS=? Returns the list of network operators in the format:
+COPS: ( <stat> ,<oper (in format=0)>,””,<oper (in format=2)> )
where the new parameter stat defines the status of the operator:
<stat> = 0 – unknown
<stat> = 1 – available
<stat> = 2 – current
<stat> = 3 – forbidden
Note: since with this command a network scan is done, this
command may require some seconds before the output is given.
Example
Reference GSM 07.07
SW release Version A
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TECHNICAL MANUAL
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.4 +CLCK - facility lock/ unlock
+CLCK – facility lock/unlock
Execute command
AT+CLCK =
<fac>,
<mode>[,<passwd>
[,<class>]]
It is used to lock or unlock a ME o a network facility.
Parameters: <fac>:
"SC" - SIM (PIN request) (device asks SIM password at power-up and
when this lock command issued)
"AO"- BAOC (Barr All Outgoing Calls)
"OI" - BOIC (Barr Outgoing International Calls)
"OX"- BOIC-exHC (Barr Outgoing International Calls except to Home
Country)
"AI" - BAIC (Barr All Incoming Calls)
"IR" - BIC-Roam (Barr 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)
"FD" - SIM fixed dialling memory feature (if PIN2 authentication has
not been done during the current session, PIN2 is required as
<passwd>)
"PN" - network Personalisation
"PU" - network subset Personalisation
<mode>: defines the operation to be done on the facility
<mode> = 0 - unlock facility
<mode> = 1 - lock facility
<mode> = 2 - query status ( see below )
<passwd>: shall be the same as password specified for the facility
from the DTE user interface or with command Change Password
+CPWD
<class>: represents the class of information of the facility ( sum of bits
)
<class> = 1- voice (telephony)
<class> = 2 - data (refers to all bearer services)
<class> = 4 - fax (facsimile services) ()
Read command
AT+CLCK=<fac>,2 query the status of the facility <fac>; returns
+CLCK:<status>
where <status> defines the current status of the
facility:
0 - not active ( locked )
1 - active ( unlocked )
Note: For some facility the status is requested to the network, hence if
no network is available the command returns the ERROR message.
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+CLCK – facility lock/unlock
Write command
Test command
AT+CLCK=? Reports all the facility supported by the device.
Example
Reference GSM 07.07
SW release Version A
2.5.3.5 +CPWD - change facility password
+CPWD – change facility password
Execute command
AT+CPWD = <fac>,
<oldpwd>, <newpwd> Changes the password for the facility lock function of the facility fac.
Parameter: <fac>, <oldpwd>, <newpwd>
Note: parameter <oldpwd> is the old password while <newpwd> is the
new one.
Read command
Write command
Test command
Example
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2.5.3.6 +CLIP - calling line identification presentation
+CLIP – calling line identification presentation
Execute command
Read command
AT+CLIP? Returns the status of the supplementary service CLI in the format:
+CLIP: <n>, <m>
where:
<n> = 0 - CLI presentation disabled
<n> = 1 - CLI presentation enabled
<m>: status if the CLIP service on the GSM network
<m> = 0 - CLIP not provisioned
<m> = 1 - CLIP provisioned
<m> = 2 - unknown (e.g. no network is present )
Note: This command issues a status request to the network, hence it
may take a few seconds to give the answer due to the time needed to
exchange data with it.
Write command
AT+CLIP = <n> Enables or disables the calling line identification supplementary
service presentation depending on the value of the parameter <n>.
Parameters: <n>
<n> = 0 - disables CLI indication
<n> = 1 - enables CLI indication
If enabled the device reports after each RING the response:
+CLIP:<number>,<type>
where:
<number>: calling line number
<type>- type of number:
<type> = 145 - international numbering scheme (contains the character
"+")
<type> = 129 - national numbering scheme
Note: The command changes only the report behaviour of the device,
it does not change CLI supplementary service setting on the network.
Test command
AT+CLIP=? Returns the supported values of the parameter <n>
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.7 +CLIR - calling line identification restriction
+CLIR – calling line identification restriction
Execute command
Read command
AT+CLIR? Reports the network & the device CLIR setting in the format:
+CLIR:<n>,<m>
where
<n> is the facility status on the Mobile
0 – CLIR facility according to CLIR service network status
1 – CLIR facility active (CLI not sent)
2 – CLIR facility not active (CLI sent)
<m> is the facility status on the Network
0 - CLIR service not provisioned
1 - CLIR service provisioned permanently
2 - unknown (e.g. no network present, etc.)
3 - CLI temporary mode presentation restricted
4 - CLI temporary mode presentation allowed
Write command
AT+CLIR =
<n>,<m>
Refers to CLIR – service that allows a calling subscriber to enable or disable
the presentation of the CLI to the called party when originating a call
according to the parameters <n> and <m> given
Parameters: <n>, <m>
<n> is the facility status on the Mobile
0 – CLIR facility according to CLIR service network status
1 – CLIR facility active (CLI not sent)
2 – CLIR facility not active (CLI sent)
<m> is the facility status on the Network
0 - CLIR service not provisioned
1 - CLIR service provisioned permanently
3 - CLI temporary mode presentation restricted
4 - CLI temporary mode presentation allowed
Note: This command set the default behaviour of the device in outgoing calls
and of the network. The two settings should not be conflicting.
Test command
AT+CLIR=? Reports the supported values of the parameter <n>.
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.8 +CCFC - call forwarding number and conditions
+CCFC – call forwarding number and condition
Execute command
AT+CCFC =
<reason>,
<cmd>[,<number>[,<ty
pe>[,<class>][,,,<time>]
]]
Controls the call forwarding supplementary service. Registration,
erasure, activation, deactivation, and status query are supported.
Parameters:
<reason> = 0 – unconditional
<reason> = 1 - mobile busy
<reason> = 2 - no reply
<reason> = 3 - not reachable
<reason> = 4 - all calls (not with query command)
<reason> = 5 - all conditional calls (not with query command)
<cmd> = 0 – disable
<cmd> = 1 - enable
<cmd> = 2 - query status (see below for further explanations)
<cmd> = 3 – registration
<cmd> = 4 – erasure
<number>: phone number of forwarding address in format specified by
<type> parameter
<type>: type of address byte in integer format :
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
<class>: is a sum of integers each representing a class of information
which the command refers; default 7 ( voice + data + fax )
<class> = 1 - voice (telephony)
<class> = 2 - data
<class> = 4 - fax (facsimile services, from SW release C)
<time>: is the time in seconds after which the call is diverted if "no
reply" reason is chosen. Valid only for "no reply" reason.
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+CCFC – call forwarding number and condition
Read command
AT+CCFC =
<reason>,2,[number>[,
<type>[,dopo
<time>s]]]
Queries the network for forwarding service settings on a specific
reason. The result is in the form:
+CCFC:<status>,<class>[,<number>[,<type>[,dopo <time>s]]]
where:
<status> = 0 - service not active
<status> = 1 - service active (calls will be forwarded)
<time>: - 1...30 when "no reply" option for reason is enabled or
queried, this gives the time in seconds to wait before call is forwarded,
default value is 20.
The other parameters are as seen before.
Note: When querying the status of a network service (<cmd>=2) the
response line for 'not active' case (<status>=0) should be returned only if
service is not active for any <class>.
Write command
Test command
AT+CCFC=? Reports supported values for the parameter <reason>.
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.9 +CCWA - call waiting
+CCWA – call waiting
Execute command
AT+CCWA =
[<n>[,<cmd>[,<class>]]]
Controls the call waiting indication supplementary service.
Activation, deactivation, and status query are supported.
Parameters:
<n>: enables/disables call waiting indication reporting:
<n> = 0 – disable
<n> = 1 - enable
<cmd> enables/disables or queries the service at network level:
<cmd> = 0 - disable
<cmd> = 1 – enable
<cmd> = 2 - query status
<class>: is a sum of integers each representing a class of information
which the command refers; default 7 ( voice + data + fax )
<class> = 1 - voice (telephony)
<class> = 2 - data
<class> = 4 - fax (facsimile services)
The response to the query command is in the form:
+CCWA=<status>,<class>
Where
<status> represents the status of the service:
<status> = 0 - inactive
<status> = 1 - active
<class> is the class of calls the service status refers to.
Note: if parameter <cmd> is omitted then network is not interrogated.
Note2: In the query command the class parameter must not be issued.
Note3: The difference between call waiting report disabling
(AT+CCWA = 0,1,7) and call waiting service disabling (AT+CCWA
= 0,0,7) is that in the first case the call waiting indication is sent to the
device by network but this last one does not report it to the DTE;
instead in the second case the call waiting indication is not generated
by the network. Hence the device results busy to the third party in the
2nd case while in the 1st case a ringing indication is sent to the third
party.
Note4: The command AT+CCWA=1,0 is a non sense and must not be
issued.
Read command
AT+CCWA? Reports the current value of the parameter <n>.
Write command
Test command
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+CCWA – call waiting
AT+CCWA=? Reports the supported values for the parameter <n>.
Example
Reference GSM 07.07
SW release Version A
2.5.3.10 +CHLD - call holding services
+CHLD – call holding services
Execute command
AT+CHLD = <n> Controls the network call hold service. With this service it is possible
to disconnect temporarily a call and keep it suspended while it is
retained by the network, contemporary it is possible to connect
another party or make a multiparty connection.
The action of the command depends on the value of the parameter
Parameter:
<n> = 0 Releases all pending calls
<n> = 1 Releases all active calls (if present), and accepts or
reconnects the pending or waiting call
<n> = 2 Suspends (into pending status) the active call and accepts
or reconnects the waiting or pending call.
<n> = 3 NOT SUPPORTED
Note: ONLY for VOICE calls
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.11 +CUSD - unstructured supplementary service data
+CUSD – unstructured supplementary service data
Execute command
AT+CUSD = <n>,[<str>] Enables /disables the unstructured service data reporting.
Parameters:
<n>: is used to disable/enable the presentation of an unsolicited result
code: +CUSD: <m>[,<str>,<dcs>] to the TE.
<n>:
<n> = 0 - disable the result code presentation in the DTA
<n> = 1 - enable the result code presentation in the DTA
<dcs> indicates which alphabet is used (Data Coding Scheme),refer to
command Select TE Character Set +CSCS
<str> - USSD-string (when <str> parameter is not given, network is
not interrogated):
- if TE character set other than "HEX": ME/TA converts GSM
alphabet into current TE character set according to rules of GSM
07.05
- if TE character set is "HEX": ME/TA converts each 7-bit character
of GSM alphabet into two IRA character long hexadecimal number
(e.g. character ? (GSM 23) is presented as 17 (IRA 49 and 55))
-if<dcs> indicates that 8-bit data coding scheme is used: ME/TA
converts each 8-bit octet into two IRA character long hexadecimal
number (e.g. octet with integer value 42 is presented to TE as two
characters 2A (IRA 50 and 65))
<m>:
<m> = 0 - no further user action required, hence network initiated
USSD-Notify, or no further information needed after mobile initiated
operation.
<m> = 1 - further user action required, hence network initiated
USSD-Request, or further information needed after mobile initiated
operation
<m> = 2 - USSD terminated by the network
<m> = 3 - other local client has responded
<m> = 4 - operation not supported
<m> = 5 - network time out
Note: only mobile initiated operations are supported.
Warning: In case of successful mobile initiated operation, DTA waits
the USSD response from the network and sends it to the DTE before
the final result code. This will block the AT command interface for
the period of the operation.
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+CUSD – unstructured supplementary service data
Read command
AT+CUSD? Reports the current value of the parameter <n>
Write command
Test command
AT+CUSD=? Reports the supported values for the parameter <n>:
<n> = 0 - result code presentation in the TA disabled
<n> = 1 - result code presentation in the TA enabled
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.12 +CAOC - advice of charge
+CAOC – advice of charge
Execute command
AT+CAOC = <mode> Controls the advise of charge service; the command also includes the
possibility to enable an unsolicited event reporting of the CCM
information.
If unsolicited reporting is enabled DTE sends the result code
+CCCM: <acm>
when the CCM value changes, but not more than every 10 seconds.
<acm> - accumulated call meter value hexadecimal representation (3
byte)
Parameter:
<mode> = 0 - ACM (Accumulated Call Meter) read request
<mode> = 1 - disables unsolicited ACM reporting
<mode> = 2 - enables unsolicited ACM reporting
Note: +CAOC command uses the ACM of the device internal
memory, not the ACM stored in the SIM. The difference is that the
internal memory ACM is reset at power up, while the SIM ACM is
reset only on user request. Advice of Charge values stored in the SIM
(ACM, ACMmax, PUCT) can be accessed with commands +CACM,
+CAMM and +CPUC.
Read command
AT+CAOC? Reports the value of ACM in the format: +CAOC: xxxxxx.
Write command
Test command
AT+CAOC=? Reports the supported values for <mode> parameter.
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.13 +CLCC - list current calls
+CLCC – list current calls
Execute command
AT+CLCC Reports the list of current calls active and their characteristics by
sending the report
+CLCC:<id>,<dir>,<stat>,<mode>,<mpty>[,<number>,<type>]
for each active call,
where:
<id> - call identification number
<dir> - call direction
0 - mobile originated call
1 - mobile terminated call
<stat> - state of the call
0 - active
1 - held
2 - dialing (MO call)
3 - alerting (MO call)
4 - incoming (MT call)
5 - waiting (MT call)
<mode> - call type
0 – voice
1 – data
2 – fax
9 - unknown
<mpty> - multiparty call flag
0 - call is not one of multiparty (conference) call parties
1 - NOT SUPPORTED
<number>: phone number in format specified by <type>
<type>: type of phone number byte in integer format
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
Note: If no call is active then only OK message is sent. This command
is useful in conjunction with command +CHLD to know the various
call status for call holding.
Read command
Write command
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.3.14 +CSSN – SS Notification
+CSSN – SS notification
Execute command
Read command
Write command
AT+CSSN = <n>, <m> Enable/disable the supplementary service related network initiated
notifications, during the origin of outgoing calls (+CSSI) and
incoming calls (+CSSU)
Parameters:
<n>: sets the +CSSI result code presentation status
0 disable
1 enable
<m>: sets the +CSSU result code presentation status
0 disable
1 enable
Test command
Example
Reference GSM 07.07
SW release Version A
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5.4.3.15 +CCUG – Closed User Group supplementary service control
+CCUG – Closed User Group supplementary service control
Execute command
Read command
AT+CCUG? Reports the current value of the parameters in the format:
+CCUG: <n>,<index>,<info>
Write command
AT+CCUG=<n>[,
<index>[,<info>]] Enable/disable the CUG supplementary service
Parameters:
<n>
0 - disables the temporary CUG settings for all the successive calls
1 - enables the temporary CUG settings for all the successive calls
<index>
0...9 - CUG index
10 - no index (preferential CUG taken from subscriber data)
<info>
0 - no information
1 - suppress Outgoing Access (OA)
2 - suppress preferential CUG
3 - suppress OA and preferential CUG
Test command
AT+CCUG=? Reports the supported range of values for the parameters
<n>,<index>, <info>
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.4 Mobile Equipment control
2.5.4.1 +CPAS - phone activity status
+CPAS – phone activity status
Execute command
AT+CPAS
reports the device status in the form
+CPAS: <pas>
where
<pas> - phone activity status
0 - ready (Device allows commands from TA/TE)
1 - unavailable (Device does not allow commands from TA/TE)
2 - unknown (Device is not guaranteed to respond to instructions)
3 - ringing (Device is ready for commands from TA/TE, but the
ringer is active)
4 - call in progress (Device is ready for commands from TA/TE,
but a call is in progress)
Read command
AT+CPAS?
same as Execute command.
Write command
Test command
AT+CPAS=? Reports the supported range of values of <pas>.
Example ATD03282131321;
OK
AT+CPAS?
+CPAS: 3 (the called phone is ringing)
OK
AT+CPAS?
+CPAS: 3
OK
AT+CPAS?
+CPAS: 4 (the called phone has answered to your call)
OK
ATH
OK
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Tri Band GPRS Data Terminal System Rev.1
2.5.4.2 +CFUN Set phone functionality (Power Saving Management)
+CFUN – power saving management
Execute command
Read command
AT+CFUN? reports the power saving status in the form:
+CFUN: <fun>
where
<fun> - power saving status
1 - power saving disabled
5 - power saving enabled
Note: The phone functionality remains always FULL.
Write command
AT+CFUN=<fun> Enables/disables the power saving function.
If enabled it reduces the power consumption during the idle time, thus
allowing a longer standby time with a given battery capacity.
Parameters:
<fun>: is the power saving function mode
1 - Mobile full functionality with power saving disabled (default)
5 - Mobile full functionality with power saving enabled
Note: To place the telephone in power saving mode, other than to set
the <fun> parameter at value = 5, the line DTR (RS232) must be set to
OFF. Once in power saving, the CTS line switch to the OFF status to
signal that the telephone is really in power saving condition.
During the power saving condition, before sending any AT command
on the serial line, the DTR must be enabled and it must be waited for
the CTS (RS232) line to go in ON status.
Until the DTR line is ON, the telephone will not return back in the
power saving condition.
Note2: The power saving function does not affect the network behavior
of the GM862-GPRS, even during the power save condition the
module remains registered on the network and reachable for incoming
calls or SMS. If a call incomes during the power save, then the module
will wake up and proceed normally with the unsolicited incoming call
code
Test command
Example
Reference GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.5.4.3 +CPIN - enter PIN
+CPIN – enter PIN
Execute command
Read command
AT+CPIN? Reports the PIN/PUK/PUK2 request status of the device in the form:
+CPIN:<code>
where <code> is the PIN/PUK/PUK2 request status code:
READY - device is not pending for any password
SIM PIN - device is waiting SIM PIN to be given
SIM PUK - device is waiting SIM PUK to be given
SIM PIN2 - device is waiting SIM PIN2 to be given; this <code>
is returned only when the last executed command resulted in PIN2
authentication failure (i.e. +CME ERROR: 17)
SIM PUK2 - device is waiting SIM PUK2 to be given; this
<code> is returned only when the last executed command resulted in
PUK2 authentication failure (i.e. +CME ERROR: 18)
PH-NET PIN - device is waiting network personalization
password to be given
PH-NETSUB PIN - device is waiting network subset
personalization password to be given
Note: Pin pending status at startup depends on PIN facility setting, to
change or query the default power up setting use the
AT+CLCK=SC,<mode>, <pin> command.
Write command
AT+CPIN =
<pin>[,<newpin>] Sends to the device a password (SIM PIN, SIM PUK, PH-SIM PIN,
etc.) which may be required to further operate the device.
If the PIN required is SIM PUK or SIM PUK2, the <newpin> is
required. This second pin, <newpin>,will replace the old pin in the
SIM.
The command may be used to change the SIM PIN by sending it with
both parameters <pin> and <newpin> when if PIN request is pending;
if no PIN request is pending the command will return an error code and
to change the PIN the command +CPWD must be used instead.
Parameters: <pin>, <newpin>
Note: the only commands which are accepted when device is pending
SIM PIN, SIM PUK, or PH-SIM are: +CGMI, +CGMM, +CGMR,
+CGSN, D112; (emergency call), +CPAS, +CPIN.
To check the status of the PIN request use the command AT+CPIN?
Test command
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+CPIN – enter PIN
Example AT+CMEE=1
OK
AT+CPIN?
+CME ERROR: 10 (error because you have to insert the SIM)
AT+CPIN?
+CPIN: READY (this response is after you have inserted the SIM)
OK
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2.5.4.4 +CSQ- signal quality
+CSQ – signal quality
Execute command
AT+CSQ Reports received signal quality indicators in the form
+CSQ:<rssi>,<ber>
where
<rssi> - received signal strength indication
0 - 113 dBm or less
1 - 111 dBm
2...30 - 109dBm ... -53 dBm / 2 dBm per step
31 - 51 dBm or greater
99 - not known or not detectable
<ber> - bit error rate %
0 - less than 0.2 %
1 - 0.2% a 0.4%
2 - 0.4% a 0.8%
3 - 0.8% a 1.6%
4 - 1.6% a 3.2%
5 - 3.2% a 6.4%
6 - 6.4% a 12.8%
7 - more than 12.8%
99 - not known or not detectable
Note: this command should be used instead of the AT%Q and AT%L
commands, since GSM relevant parameters are the radio link ones and
no line is present, hence %Q %L and have no meaning.
Read command
Write command
Test command
AT+CSQ=? Returns the supported range of values of the parameters <rssi>and
<ber>.
Example
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2.5.4.5 +CPBS - select phonebook memory storage
+CPBS – select phonebook memory storage
Execute command
Read command
Write command
AT+CPBS = <storage> Selects phonebook memory storage <storage>, which will be used by
other phonebook commands.
Parameter: <storage>
"SM" - SIM phonebook
"FD" - SIM fixed dialling-phonebook (only phase 2/2+ SIM)
"LD" - SIM last-dialling-phonebook (+CPBW and +CPBF are not
applicable for this storage)
"MC" - device missed (unanswered received) calls list (+CPBW
and +CPBF are not applicable for this storage)
"RC" - ME received calls list (+CPBW and +CPBF are not
applicable for this storage)
Test command
Example
Reference GSM 07.07
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Tri Band GPRS Data Terminal System Rev.1
2.5.4.6 +CPBR - read phonebook entries
+CPBR – read phonebook entries
Execute command
Read command
Write command
AT+CPBR =
<index>[,<index2>] returns phonebook entries in locations number from <index1> to
<index2> from the current phonebook memory storage selected with
+CPBS. If<index2> is omitted, only location <index1> is returned.
Parameters: <index>, <index2>
The response format is:
+CPBR: <index>,<number>,<type>,<name>
where
<index> - the current position number of the PB index (to see the
range of values use +CPBR=?)
<number> - the phone number stored in the format <type>
<type> - type of phone number byte in integer format
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
<name> - the alphanumeric text associated to the number (e.g. name
of address)
Note: If all queried locations are empty (but available), no information
text lines will be returned, while if listing fails in an ME error, +CME
ERROR: <err> is returned.
Test command
AT+CPBR=? Returns the supported range of values of the parameters in the form
+CPBR: (<minIndex> - <maxIndex>),<nlength>,<tlength>
where
<minIndex> - the minimum index number
<maxIndex>- the maximum index number
<nlength> - maximum number field length
<tlength> - maximum name field length
Note: remember to select the PB storage with +CPBS command
before issuing PB commands.
Example
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2.5.4.7 +CPBF - find phonebook entries
+CPBF – find phonebook entries
Execute command
Read command
Write command
AT+CPBF = <text> Issues a search for the phonebook records that have the text sub-string
at the start of the name field and returns a report in the form
+CPBF: <index>,<number>,<type>,<name>
where index, number, type and name have the same meaning than in
the command +CPBR report.
If no PB records satisfy the search criteria then an ERROR message is
reported.
Parameter: <text>
Note: text is NOT case sensitive and may or not be included in double
brackets.
Test command
AT+CPBF=? Reports the maximum lengths of fields <number> and
<name> in the PB entry in the form:
+CPBF: <max_number_length>,<max_name_length>
Example
Reference GSM 07.07
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Tri Band GPRS Data Terminal System Rev.1
2.5.4.8 +CPBW - write phonebook entry
+CPBW – write phonebook entry
Execute command
Read command
Write command
AT+CPBW =
[<index>][,<number>[,
<type>[,<name>]]]
Stores at the position <index> a Phonebook record defined by
<number>,<type> and <name> parameters
Parameters: <index>, <number>, <type>, <name>
<number> - the phone number in the format <type>
<type> - the type of number
145 - international numbering scheme (contains the character "+")
129 - national numbering scheme
<name> - the text associated to the number.
Note: If record number <index> already exists, it will be overwritten.
If only <index> is given, the record number <index> is deleted.
If <index> is omitted, the number <number> is stored in the first free
phonebook location.
Text in the <name> field and number in the <number> field may or
may not be included in double brackets.
Test command
AT+CPBW=? Reports the maximum lengths of fields <number> and <name> in the
PB entry in the form:
+CPBW: <max_number_length>,<max_name_length>
Example
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2.5.4.9 +CCLK - Clock Management
+CCLK – Clock Management
Execute command
Read command
AT+CCLK? Reports the current time stored in the internal Real Time Clock in the
format:
+CCLK: <time>
Write command
AT+CCLK = <time> Stores in the internal Real Time Clock the current time defined by the
parameter <time>
Parameter:
<time> - current time in the format : "yy/MM/dd,hh:mm:ss±zz"
where:
yy - year
MM - month (in digits)
dd - day
hh - hour
mm - minute
±zz - time zone in quarter of an hour (difference between the GMT and
the local time)
Test command
Example AT+CCLK="02/09/07,22:30:00+04"
OK
AT+CCLK?
+CCLK: 02/09/07,22:30:25+4
OK
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2.5.4.10 +CALA - Alarm Management
+CALA – Alarm Management
Execute command
Read command
AT+CALA? Reports the current alarm time stored in the internal Real Time Clock,
if present, in the format:
+CALA: <time>,<n>,<type>[,<text>]
Write command
AT+CALA = [<time>
[,<n>[,<type>[,<text>]]]] Stores in the internal Real Time Clock the current alarm time and
settings defined by the parameters <time>, <n>,<type>,<text>.
When the RTC time reaches the alarm time then the alarm starts, the
behaviour of the GM862-PCS depends upon the setting <type> and if
the device was already ON at the moment when the alarm time had
come.
Parameter:
<time> - current alarm time in the format : "yy/MM/dd,hh:mm:ss±zz"
as defined for +CCLK command.
<type> - alarm behaviour type
0 - reserved for other equipment use.
1 - the GM862-PCS simply wakes up fully operative as if the
ON/OFF pin had been pressed. If the device is already ON at the
alarm time, then it does nothing.
2 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
was off, otherwise it remains fully operative. In both cases the
GM862-PCS issues an unsolicited code every 3s:
+ALARM: <text>
Where <text> is the other +CALA parameter previously set.
The device keeps on sending the unsolicited code every 3s until a
#WAKE or #SHDN command is received or a 90s timeout
occurs. If the device is in "alarm mode" and it does not receive
the #WAKE command within 90s then it shuts down. (default)
3 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
was off, otherwise it remains fully operative. In both cases the
GM862-PCS starts playing the alarm tone on the selected path for
the ringer (see command #SRP)
The device keeps on playing the alarm tone until a #WAKE or
#SHDN command is received or a 90s timeout occurs. If the
device is in "alarm mode" and it does not receive the #WAKE
command within 90s then it shuts down.
4 - the GM862-PCS wakes up in "alarm mode" if at the alarm time it
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was off, otherwise it remains fully operative. In both cases the
GM862-PCS brings the pin GPIO6 high, provided its <direction>
has been set to alarm output, and keeps it in this state until a
#WAKE or #SHDN command is received or a 90s timeout
occurs. If the device is in "alarm mode" and it does not receive the
#WAKE command within 90s then it shuts down.
5 - the GM862-PCS will make both the actions as for type=2 and
type=3.
6 - the GM862-PCS will make both the actions as for type=2 and
type=4.
7 - the GM862-PCS will make both the actions as for type=3 and
type=4.
<n> = 0 - index of the alarm
The only value supported for <n> is 0.
<text> - unsolicited alarm code text string
In the case that <type> is equal to 2 or 5 or 6, then the unsolicited
text parameter <text> can be set by this parameter.
Note: The "alarm mode" is indicated by hardware pin CTS to the ON
status and DSR to the OFF status, while the "power saving" status is
indicated by a CTS - OFF and DSR - OFF status. The normal operating
status is indicated by DSR - ON.
During the "alarm mode" the device will not make any network scan
and will not register to any network and therefore is not able to dial or
receive any call or SMS, the only commands that can be issued to the
GM862-PCS in this state are the #WAKE and #SHDN, every other
command must not be issued during this state.
Test command
AT+CALA=? Reports the supported range of values for the parameters <time>,<n>,
<type> and <text> maximum length
Example AT+CALA="02/09/07,23:30:00+04"
OK
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2.5.4.11 +CALM - alert sound mode
+CALM – alert sound mode
Execute command
Read command
Write command
AT+CALM = <mode> It is used to select the general alert sound mode of the device.
Parameter:
<mode> = 0 - normal mode
<mode> = 1 - silent mode (no sound will be generated by the device)
Note: if silent mode (1) is selected then incoming calls will not produce
alerting sounds but only the message RING or +CRING.
Test command
AT+CALM=? Returns the supported values for the parameter <mode>.
Example
Reference GSM 07.07
SW release Version A
2.5.4.12 +CRSL - ringer sound level
+CRSL – ringer sound level
Execute command
Read command
AT+CRSL? Reports the current <level> setting of the call ringer in the format:
+CRSL: <level>
Write command
AT+CRSL = <level> It used to select the incoming call ringer sound level of the device.
Parameter: <level> - ringer sound level
<level> = 0 - Off
<level> = 1 - low
<level> = 2 - middle
<level> = 3 - high
<level> = 4 – progressive
Test command
AT+CRSL=?
Reports <level> supported values range in the format:
+CRSL: (0-4)
Example
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2.5.4.13 +CLVL - loudspeaker volume level
+CLVL – loudspeaker volume level
Execute command
Read command
AT+CLVL? Reports the current <level> setting of the loudspeaker volume in the
format: +CLVL: <level>
Write command
AT+CLVL = <level> It used to select the volume of the internal loudspeaker audio output of
the device.
Parameter: <level> - loudspeaker volume varies between 0 (min) and
10 (max).
Test command
AT+CLVL=?
Reports <level> supported values range in the format:
+CLVL: (0-10)
Example
Reference GSM 07.07
SW release Version A
2.5.4.14 +CMUT - microphone mute control
+CMUT – microphone mute control
Execute command
Read command
AT+CMUT? Reports the selected microphone (internal/external) mute status in the
format:
+CMUT: <n>
Write command
AT+CMUT = <n>
Enables/disables the muting of the microphone audio line depending
on n parameter value
Parameter:
<n > = 0 - microphone active
<n > = 1 - microphone muted
Note: this command mutes/activates both microphone audio paths,
internal mic and external mic.
Test command
AT+CMUT=? Reports the supported values for <n> parameter.
Example
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2.5.4.15 +CACM - accumulated call meter
+CACM – accumulated call meter
Execute command
Read command
AT+CACM? Reports the current value of the SIM ACM in the format
+CACM: <n>
Note: the value <n> is in units whose price and currency is defined
with command +CPUC
Write command
AT+CACM = <pwd> Resets the SIM Accumulated Call Meter (ACM). Internal memory
CCM remains unchanged.
Parameter: <pwd> - PIN2 password
Note: to access this command PIN2 password is required
Test command
Example
Reference GSM 07.07
SW release Version A
2.5.4.16 +CAMM - accumulated call meter maximum
+CAMM – accumulated call meter maximum
Execute command
Read command
AT+CAMM? Reports the maximum value of ACM stored in SIM in the format:
+CAMM : <acmmax>
Write command
AT+CAMM =
<acmmax>, <pwd> Sets the Advice of Charge related Accumulated Call Meter ACM
maximum value in SIM (see also +CACM command). This value
represents the maximum number of home units allowed to be
consumed by the subscriber. When ACM reaches <acmmax> value
further calls are prohibited. SIM PIN2 is required to set the value.
Parameter:
<acmmax>- maximum number of units allowed to be
consumed
<pwd>- PIN2 password
Note: The <acmmax> = 0 value disables the feature.
Test command
Example
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2.5.4.17 +CPUC - price per unit and currency table
+CPUC – price per unit and currency table
Execute command
Read command
AT+CPUC? Reports the current values of <currency> and <ppu> parameters in the
format: +CACM : <currency>,<ppu>
Write command
AT+CPUC =
<currency>,
<ppu>,<pwd>
Sets the values of Advice of Charge related price per unit and
currency table in SIM. The price per Unit currency table
information can be used to convert the home units (as used in
commands +CAOC, +CACM and +CAMM) into currency
units.
Parameters:
<currency> - three-character currency code string (e.g. LIT, USD,
DEM etc..)
<ppu> - price per unit string (dot is used as decimal separator) e.g.
1989.27
<pwd> - SIM PIN2
Note: SIM PIN2 is required to set the values.
Test command
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.5 Mobile equipment errors
2.5.5.1 +CMEE - report mobile equipment error
+CMEE – report mobile equipment error
Execute command
Read command
Write command
AT+CMEE = <n> Enables/disables the report of result code.
+CME ERROR: <err>
as an indication of an error relating to the +Cxxx commands issued.
When enabled, device related errors cause the +CME ERROR: <err>
final result code instead of the default ERROR final result code.
ERROR is anyway returned normally when the error message is
related to syntax, invalid parameters, or DTE functionality.
Parameter:
<n> - enable flag
<n> = 0 - disable +CME ERROR:<err> reports, use only ERROR
report.
<n> = 1 - enable +CME ERROR:<err> reports, with <err> in numeric
format
<n> = 2 - disable +CME ERROR: <err> reports, with <err> in verbose
format
Test command
Example
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Tri Band GPRS Data Terminal System Rev.1
2.5.5.2 +CME ERROR: - ME error result code
This is NOT a command, it is the error response to +Cxxx GSM 07.07 commands.
Syntax: AT+CME ERROR:<err>
Parameter: <err> - error code can be either numeric or verbose.
<err> values:
Numeric Format Verbose Format
0 phone failure
1 no connection to phone
2 phone-adaptor link reserved
3 operation not allowed
4 operation not supported
5 PH-SIM PIN required
6 NOT SUPPORTED
7 NOT SUPPORTED
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 personalization PIN required
47 corporate personalization PUK required
100 unknown
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2.5.6 Voice Control (TIA IS-101)
2.5.6.1 +VTS: - DTMF tones transmission
+VTS – DTMF tones transmission
Execute command
Read command
Write command
AT+VTS = <DTMF> Allows the transmission of DTMF tones
Parameter:
<DTMF> - a single ASCII character in the set 0-9, #,*,A-D
Note: this commands operates in voice mode only
Test command
AT+VTS=? Returns +VTS(),(),()
Example
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2.5.7 Commands For GPRS
2.5.7.1 +CGACT - PDP context activate or deactivate
+ CGACT – PDP context activate or deactivate
Execute command
Read command
AT+CGACT?
Returns the current activation states for all the defined PDP contexts.
Write command
AT+CGACT = <state>[,
<cid>[, <cid>[,…]]]]
The command is used to activate or deactivate the specified PDP
context (s)
Parameters:
<state> - indicates the state of PDP context activation
0 - deactivated
1 - activated
<cid> - a numeric parameter which specifies a particular PDP context
definition (see +CGDCONT command)
Test command
AT+CGACT=?
Reports information on the supported PDP context activation states
parameters in the format: +CGACT: (0,1)
Example AT+CGACT?
+CGACT: 1,1
OK
AT+CGACT=1,1
OK
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2.5.7.2 +CGATT - GPRS attach or detach
+ CGATT – GPRS attach or detach
Execute command
AT+CGATT = <state>
The command is used to attach the terminal to, or detach the terminal
from, the GPRS service depending on the parameter <state>.
Parameter:
<state> - indicates the state of GPRS attachment
0 - detached
1 - attached
Read command
AT+CGATT?
Returns the current GPRS service state.
Write command
Test command
AT+CGATT=?
Requests information on the supported GPRS service states.
Example AT+CGATT?
+CGATT: 0
OK
AT+CGATT=?
+CGATT: (0,1)
OK
AT+CGATT=1
OK
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2.5.7.3 +CGDATA - Enter data state
+ CGDATA – Enter data state
Execute command
AT+CGDATA = [<L2P>
,[<cid> [,<cid> [,…]]]]
The command causes to perform whatever actions are necessary to
establish communication with the network using one or more GPRS
PDP types.
Parameters:
<L2P> - string parameter that indicates the layer 2 protocol to be used
"PPP" - PPP Point-to-point protocol
If the value is omitted, the layer 2 protocol is unspecified
<cid> - numeric parameter which specifies a particular PDP context
definition (see +CGDCONT command).
Read command
Write command
Test command
AT+CGDATA=?
Requests information on the supported layer 2 protocols.
Reports the supported <L2P> parameters values
Example AT+CGDATA=?
+CGDATA: (”PPP”)
OK
AT+CGDATA=”PPP”,1
OK
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2.5.7.4 +CGDCONT - define PDP context
+ CGDCONT – define PDP context
Execute command
Read command
AT+CGDCONT?
Returns the current settings for each defined context in the format:
+CGDCONT : <cid>,<PDP_type>,<APN>,<PDP_addr>,
<d_comp>,<h_comp>,<pd1> [,…[,pdN]]]]]]]]]
Write command
AT+CGDCONT = [<cid>
[,<PDP_type>
[,<APN>[,<PDP_addr>,
<d_comp>
[,<h_comp>[,<pd1>
[,…[,pdN]]]]]]]]]
The command specifies PDP context parameter values for a PDP
context identified by the (local) context identification parameter,
<cid>
Parameters:
<cid> (PDP Context Identifier) : a numeric parameter which specifies
a particular PDP context definition. The range of permitted values
(minimum value = 1) is returned by the test form of the command.
<PDP_type> (Packet Data Protocol type) : a string parameter which
specifies the type of packet data protocol
"IP" - Internet Protocol
"PPP" - Point to Point Protocol
<APN> (Access Point Name) : a string parameter which is a 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.
<PDP_address>: a string parameter that identifies the terminal in
the address space applicable to the PDP. The allocated address may be
read using the +CGPADDR command.
<d_comp>: a numeric parameter that controls PDP data compression
0 - off (default if value is omitted)
1 - on
<h_comp>: a numeric parameter that controls PDP header
compression
0 - off (default if value is omitted)
1 - on
<pd1>, … <pdN>: zero to N string parameters whose meanings are
specific to the <PDP_type>
Test command
AT+CGDCONT=?
Returns values supported as a compound value
Example AT+CGDCONT?
+CGDCONT: 1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0
OK
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AT+CGDCONT=?
+CGDCONT: (1-3),”IP”,,,(0-1),(0-1)
OK
AT+CGDCONT=1, ”IP”, ”uni.tim.it”, ”10.10.10.10”,0,0
OK
Reference GSM 07.07
SW release Version A
3.3.7.1 +CGPADDR - show PDP address
+ CGPADDR – show PDP address
Execute command
Read command
Write command
AT+CGPADDR = [<cid>
[,<cid> [,…]]]
Returns a list of PDP addresses for the specified context identifiers in
the format:
+CGPADDR: <cid>,<PDP_addr>
[<CR><LF>+CGPADDR: <cid>,<PDP_addr>]
Parameters:
<cid> - a numeric parameter which specifies a particular PDP
context definition (see +CGDCONT command). If no <cid> is
specified, the addresses for all defined contexts are returned.
<PDP_address> - a string that identifies the terminal in the
address space applicable to the PDP. The address may be static or
dynamic. For a static address, it will be the one set by the +CGDCONT
command when the context was defined. For a dynamic address it will
be the one assigned during the last PDP context activation that used the
context definition referred to by <cid>,<PDP_addr> is omitted if
none is available
Test command
AT+CGPADDR=?
Returns a list of defined <cid>s.
Example AT+CGPADDR=1,2
+CGPADDR = 1,”10.10.15.15”
+CGPADDR = 2,”10.10.20.10”
OK
AT+CGPADDR=?
+CGPADDR: (1-3)
OK
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2.5.7.5 +CGREG - GPRS network registration status
+ CGREG – GPRS network registration status
Execute command
Read command
AT+CGREG?
Returns the status of result code presentation mode <n> and the integer
<stat> which shows whether the network has currently indicated the
registration of the terminal in the format: +CGREG:<n>,<stat>.
Write command
AT+CGREG = <n>
The command controls the presentation of an unsolicited result code
+CGREG: <stat>
when <n>=1 and there is a change in the terminal GPRS network
registration status, or an unsolicited code
+CGREG: <stat>[,<lac>,<ci>]
when <n>=2 and there is a change of the network cell.
Parameter:
<n> - result code presentation mode
0 - disable network registration unsolicited result code
1 - enable network registration unsolicited result code
+CGREG: <stat>
2 - enable network registration and location information unsolicited
result code +CGREG:<stat>[,<lac>,<ci>]
where:
<lac> - location area code in hexadecimal format
(e.g. "00C3" equals 195 in decimal)
<ci> - cell ID in hexadecimal format
<stat> - registration status
0 - not registered, terminal is not currently searching a new operator
to register to
1 - registered, home network
2 - not registered, but terminal is currently searching a new operator
to register to
3 - registration denied
4 - unknown
5 - registered, roaming
Test command
AT+CGREG=?
Returns supported values for parameter <n>
Example
Reference GSM 07.07
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3.3.7.2 +CGQMIN - quality of service profile (minimum acceptable)
+ CGQMIN – quality of service profile (minimum acceptable)
Execute command
Read command
AT+CGQMIN?
Returns the current settings for each defined context in the format:
+CGQMIN: <cid>,<precedence>,<delay>,<reliability>,<peak>,<mean>
Example
Write command
AT+CGQMIN = [<cid>
[,<precedence >
[,<delay> [,<reliability>
[,<peak> [,<mean>]]]]]]
This command allows to specify a minimum acceptable profile which
is checked by the terminal against the negotiated profile returned in the
Activate PDP Context Accept message
Parameters:
<cid> - PDP context identification (see +CGDCONT command).
The following parameters are defined according to GSM 03.60:
<precedence> - precedence class
<delay> - delay class
<reliability> - reliability class
<peak> - peak throughput class
<mean> - mean throughput class
If a value is omitted for a particular class then this class is not checked.
Test command
AT+CGQMIN=?
Returns values supported as a compound value.
Example AT+CGQMIN=1,0,0,3,0,0
OK
AT+CGQMIN?
+CGQMIN: 1,0,0,5,0,0
OK
AT+CGQMIN=?
+CGQMIN: (0-3),(0-3),(0-5),(0-9),(0-19,31)
OK
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3.3.7.3 +CGQREQ - quality of service profile (requested)
+ CGQREQ – quality of service profile (requested)
Execute command
Read command
AT+CGQREQ?
Returns the current settings for each defined context in the format:
+CGQREQ: <cid>,<precedence>,<delay>,<reliability>,<peak>,<mean>
Write command
AT+CGQREQ = [<cid>
[,<precedence >
[,<delay> [,<reliability>
[,<peak> [,<mean>]]]]]]
The command allows to specify a Quality of Service Profile that is
used when the terminal sends an Activate PDP Context Request
message to the network. It specifies a profile for the context identified
by the (local) context identification parameter, <cid>.
Parameters:
<cid> - PDP context identification (see +CGDCONT command).
The following parameters are defined according to GSM 03.60:
<precedence> - precedence class
<delay> - delay class
<reliability> - reliability class
<peak> - peak throughput class
<mean> - mean throughput class
If a value is omitted for a particular class then this class is not checked.
Test command
AT+CGQREQ=?
Returns parameter values supported as a compound value.
Example AT+CGQREQ?
+CGQREQ: 1,0,0,3,0,0
OK
AT+CGQREQ=1,0,0,3,0,0
OK
AT+CGQREQ=?
+CGQREQ: (0-3),(0-3),(0-5),(0-9),(0-19,31)
OK
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2.5.8 Commands For Battery Charger
2.5.8.1 +CBC - Battery Charge
+ CBC – Battery Charge
Execute command
Read command
AT+CBC
Returns the current Battery Charge status in the format:
+CBC: <bcs>,<bcl>
Parameter:
<bcs> - battery status
0 - Me is powered by the battery
<bcl> - battery charge level
0 - battery is exausted, or ME does not have a battery connected
25 - battery charge remained is estimated to be 25%
50 - battery charge remained is estimated to be 50%
75 - battery charge remained is estimated to be 75%
100 - battery is fully charged.
Write command
Test command
AT+CGACT=?
Reports information on the supported PDP context activation states
parameters in the format: +CGACT: (0,1)
Example AT+CBC
+CBC: 0,75
OK
NOTE The ME does not make differences between being powered by a
battery or by a power supply on the VBATT pins, so it is not possible
to distinguish between these two cases.
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2.6 ETSI GSM 07.05 AT Commands for SMS and
CB services
2.6.1 General configuration
2.6.1.1 +CSMS - select message service
+CSMS – select message service
Execute command
Read command
AT+CSMS? Reports the value of the current parameters in the format:
+CSMS: <service>,<mt>,<mo>,<cb>
where:
<service> - message syntax
0 - SMS syntax as defined in GSM-03.40 and GSM-03.41. AT
commands are compatible with GSM 07.05 Phase 2.
1 - SMS syntax as defined in GSM-03.40 and GSM-03.41. AT
commands are compatible with GSM 07.05 Phase 2+
<mt> - Mobile Terminated Messages
<mo> - Mobile Originated Messages
<cb> - Cell Broadcast Messages
0 - not supported
1 - supported
Write command
AT+CSMS = <service> Selects the SMS & CB services command syntax.
Parameter:
<service> = 0 - SMS syntax as defined in GSM-03.40 and GSM-
03.41. AT commands are compatible with GSM 07.05 Phase 2.
<service> = 1 - SMS syntax as defined in GSM-03.40 and GSM-03.41.
AT commands are compatible with GSM 07.05 Phase 2+
Test command
AT+CSMS=? Reports the supported value of the parameter <service> = 0.
Example
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2.6.1.2 +CPMS - preferred message storage
+CPMS – preferred message storage
Execute command
Read command
AT+CPMS? Reports the message storage status in the format:
+CPMS:<memr>,<usedr>,<totalr>,<memw>,<usedw>,<totalw>,<me
ms>,<useds>,<totals>
where <memr> , <memw> and <mems> are the selected storage
memories for reading, writing and storing respectively.
Write command
AT+CPMS =
<memr>,<memw>,<mem
s>
Selects memory storages <memr>, <memw> and <mems> to be used
for reading, writing, sending and storing received SMS.
Parameter:
<memr> - memory storage for read and delete SMS commands
"SM" - SIM SMS memory storage
"ME" - Mobile Equipment internal storage (read only, no delete)
<memw> - memory storage for write and send SMS commands
"SM" - SIM SMS memory storage
<mems> - memory storage for received SMS storing
"SM" - SIM SMS memory storage
The command returns the memory storage status in the format:
+CPMS:<usedr>,<totalr>,<usedw>,<totalw>,<useds>,<totals>
<usedr> - number of SMS stored into <memr>
<totalr> - max number of SMS that <memr> can contain
<usedw> - number of SMS stored into <memw>
<totalw> max number of SMS that <memw> can contain
<useds> - number of SMS stored into <mems>
<totals> max number of SMS that <mems> can contain
Note: The only memory storage for writing and sending supported is
the SIM internal memory "SM", so <memw> = <mems> = "SM".
Note: the received class 0 SMS are stored in the "ME" memory
regardless the <mems> setting and they are automatically deleted at
power off.
Test command
AT+CPMS=? Reports the supported values of the SMS storage memories in the
format: +CPMS: ("ME","SM"), ("SM")
Example AT+CPMS?
+CPMS: "SM",5,10,"SM",5,10,"SM",5,10
OK (you have 5 SMS SIM positions occupied of 10)
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2.6.1.3 +CMGF - message format
+CMGF –message format
Execute command
Read command
AT+CMGF? Reports the current value of the parameter <mode> = 0.
Write command
AT+CMGF = <mode> Selects the SMS format to be used in reading and writing messages.
Parameter:
<mode> = 0 - PDU as defined in GSM 3.40 and GSM 3.41
<mode> = 1 - text
Test command
AT+CMGF=? Reports the supported value of <mode> parameter.
Example
Reference GSM 07.05
SW release Version A
2.6.1.4 +CSMP – Set parameters in text mode
+CSMP –set parameters in text mode
Execute command
Read command
AT+CSMP?
Reports the current setting in the format:
+CSMP: < fo>,<vp>,<pid>,<dcs>
Write command
AT+CSMP =
<fo>,<vp>,<pid>,
<dcs>
Set the additional parameters for storing and sending SMS when the
text mode is used (+CMGF=1)
Parameter:
<fo>: message format, like defined for the first octet of message
according to GSM 3.40
<vp>: Message validity period - numerical if in relative format or
string if in absolute format according to GMS 3.40
<pid>: Protocol Identifier – defined by GSM 3.40 – in numerical
format
<dcs>: Data coding Scheme - defined by GSM 3.40 – in numerical
format
Test command
AT+CSMP=?
Reports the supported range of values for
<fo>,<vp>,<pid>,<dcs> parameters.
Example Set the parameters for an outgoing message with 24 hours of validity
period and default properties:
AT+CSMP=17,167,0,0
OK
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2.6.1.5 +CSDH – Show parameters in text mode
+CSDH –show parameters in text mode
Execute command
Read command
AT+CSDH? Report the current setting in the format:
+CSDH: <show>
Write command
AT+CSDH= <show> Show the additional parameters of received or stored SMS when the
text mode is used (+CMFG=1).
Parameter:
<show> = 0 - no additional parameters are shown
<show> = 1 - parameters set by the +CSCA and + CSMP commands
are shown and the length, sender/addressee address of SMS when
+CMT, +CMGL, +CMGR commands are utilised
Test command
AT+CSDH=? Reports the supported range of values for the parameter
<show>
Example
Reference GSM 07.05
SW release Version A
2.6.1.6 +CSAS – Save setting text mode
+CSAS –set saving text mode
Execute command
Read command
Write command
AT+CSAS=<profile>
Save setting which have been made by the +CSCA and +CSMP
commands in local volatile memory (or in the SIM if it has a dedicated
storage for this purpose).
Parameter:
<profile>: 0…3 - number of profile in which to save the setting.
The number 0 corresponds to the non volatile memory, the others
correspond to the SIM storage (if available).
Test command
AT+CSAS=? Return the possible range of values for the parameter <profile>.
Example
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2.6.1.7 +CRES – Restore text mode settings
+CRES –restore text mode settings
Execute command
Read command
Write command
AT+CRES = <profile> Restore any setting saved by +CSAS command for +CSCA and
+CSMP commands in local non volatile memory (or in the SIM if it
has a dedicated store for this purpose).
Parameter:
<profile>: 0…3 – number of profile from which to recall the setting.
The number 0 corresponds to the non volatile memory, the others
correspond to the SIM storage (if available).
Test command
AT+CRES=? Return the possible range of values for the parameter <profile>.
Example
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2.6.1.8 +CSCB – Select Cell Broadcast Message types
+CSCB –select Cell Broadcast Message types
Execute command
Read command
AT+CSCB? Reports the current value of the parameters <mode>,<misd> and
<dcss> in the format:
+CSCB: <mode>,<mids>,<dcss>
Write command
AT+CSCB=
<mode>[,<mids>[,<dcss>
]]
Selects the Cell Broadcast message types to be received by the device.
Parameter:
<mode>
0 - the message types defined by <mids> and <dcss> are accepted
1 - the message types defined by <mids> and <dcss> are rejected
<mids> : all the possible combinations of the CBM identifiers
<dcss> : all the possible combinations of CBM data coding schemes.
Test command
AT+CSCB=? Return the possible range of values for the parameter <mode>.
Example AT+CSCB?
+CSCB: 1,"","" (all CBMs are accepted, none is rejected)
OK
AT+CSCB=0,"0,1,300-315,450","0-3"
OK
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2.6.1.9 +CMS ERROR - message service failure result code
This is NOT a command, it is the error response to +Cxxx GSM 07.05 commands
Syntax: AT+CMS ERROR:<err>
Parameter: <err> - error code can be either numeric or verbose.
<err> values:
Numeric Format Verbose Format
0...127 GSM 04.11 Annex E-2 values
128...255 GSM 03.40 sub clause 9.2.3.22 values
300 ME failure
301 SMS service of ME reserved
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 acknowledgement expected
500 unknown error
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2.6.2 Message configuration
2.6.2.1 +CSCA - service center address
+CSCA –service center address
Execute command
Read command
AT+CSCA? Reports the current value of the default SCA in the format:
+CSCA: <number>,<type>
Note: if SCA is not present the device reports an error message.
Write command
AT+CSCA=<number>,
<type>
Sets the Service center Address to be used for mobile originated SMS
transmissions.
Parameter:
<number> - SC phone number in the format defined by <type>
<type> - the type of number
<type> = 145 - international numbering scheme (contains the character
"+")
<type> = 129 - national numbering scheme
Note: to use the SMS service, is mandatory to set a Service Center
Address at which service requests will be directed. SCA depends on
the operator, hence contact your operator to set the right SCA. When
this address is input, it is stored on the SIM if possible, else will be
stored on the device internal memory so, once set, the input of this
parameter is not anymore needed.
In PDU mode, this setting is used, but only when the length of the
SMSC address coded into the <pdu> parameter equals zero; else SCA
defined in the PDU will be used instead.
Test command
Example
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2.6.3 Message receiving and reading
2.6.3.1 +CNMI - new message indications to Terminal Equipment
+CNMI – new message indications to terminal equipment
Read command
AT+CNMI? Returns the current parameter settings for +CNMI command in the
form:
AT+CNMI:<mode>,<mt>,<bm>,<ds>,<bfr>
Write command
AT+CNMI=<mode>[,<mt>
[,<bm>[,<ds>[,<bfr>]]]] Selects the behavior of the device on how the receiving of new
messages from the network is indicated to the DTE.
Parameter:
<mode>- unsolicited result codes buffering option
0 - buffer unsolicited result codes in the TA in case the DTE is
busy, e.g. a data call is active meanwhile.
1- 1 Discard indication and reject new received message
unsolicited result codes when TA-TE link is reserved, otherwise
forward them to the TE.
2 - buffer unsolicited result codes in the TA in case the DTE is
busy and flush them to the TE after reservation. Otherwise report
them immediately.
<mt> result code indication reporting for SMS-DELIVER
0 - no SMS-DELIVER indications are reported to the TE.
1 - indication of the memory location is reported to the TE using
unsolicited result code:
+CMTI: <memr>,<index>
where
<memr> - memory storage where the new message is stored
("SM" or "ME")
<index> - location on the memory where SMS is stored
<bm> - broadcast reporting option
0 - Cell Broadcast Messages are not sent to the DTE
2 - New Cell Broadcast Messages are sent to the DTE with the
unsolicited result code:
+CBM: <length><CR><LF><PDU> ( in PDU mode)
or
+CBM:<sn>,<mid>,<dcs>,<pag>,<pags><CR><LF><text> (in text
mode)
where:
<length> - PDU length
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+CNMI – new message indications to terminal equipment
<PDU> - message PDU
<sn> - message serial number
<mid> - message ID
<dcs> - Data Coding Scheme
<pag> - page number
<pags> - total number of pages of the message
<text> - message text
<ds> - SMS-STATUS-REPORTs reporting option
0 - status report receiving is not reported to the DTE
1 - the status report is sent to the DTE with the unsolicited result
code:
+CDS: <length><CR><LF><PDU> (PDU mode)
or
+CDS: <fo>,<mr>,,,<scts>,<dt>,<st> (text mode)
2 - if a status report is stored, then unsolicited result code is sent:
+CDSI: <memr>,<index>
where
<memr> - memory storage where the new message is stored
("SM")
<index> - location on the memory where SMS is stored
<length> - PDU length
<PDU> - message PDU
<fo> - first octet of the message PDU
<mr> - message reference number
<scts> - arrival time of the message to the SC
<dt> - sending time of the message
<st> - message status as coded in the PDU
<bfr> - buffered result codes handling method (NOT
SUPPORTED)
0 - buffer flushed. (NOT SUPPORTED)
Note: DTR signal is ignored, hence the indication is sent even if the
DTE is inactive ( DTR signal is Low). In this case the unsolicited
result code may be lost so if GM862-PCS remains active while DTE
is not, at DTE startup is suggested to check whether new messages
have reached the device meanwhile with command AT+CMGL=0
that lists the new messages received.
Test command
AT+CNMI=? Reports the supported range of values for the +CNMI command
parameters.
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+CNMI – new message indications to terminal equipment
Reference GSM 07.05
SW release Version A
2.6.3.2 +CMGL - list messages
+CMGL – list messages
Execute command
Read command
Write command
AT+CMGL = <stat> Reports the list of all the messages stored into <memr> (see
command +CPMS ) memory storage having the status equal to <stat>
parameter.
Parameter (PDU Mode):
<stat>
0 - new message
1 - read message
2 - stored message not yet sent
3 - store message already sent
4 - all messages (applies only to +CMGL command)
A report is sent for each message that has to be listed in the format:
+CMGL: <index>,<stat>,<length><CR><LF><pdu>
where
<index> - message position in the memory storage list.
<stat> - status of the message
<length> - length of the PDU in bytes
<pdu> - message in PDU format according to GSM 3.40
Note: OK message is sent only at the end of the listing.
Parameter (Text Mode):
<stat>
"REC UNREAD" - new message
"REC READ" - read message
"STO UNSENT" - stored message not yet sent
"STO SENT" - store message already sent
"ALL" - all messages (applies only to +CMGL command)
A report is sent for each message that has to be listed in the format:
+CMGL:
<index>,<stat>,<oa/da>[,,,<tooa/toda>,<length>]<CR><LF><text>
where
<index> - message position in the storage
<stat> - message status
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+CMGL – list messages
<oa/da> - originator/destination number
< tooa/toda > - type of number <oa/da>
145 - number in international format (contains the "+")
129 - number in national format
<length> - text length
<text> - message text
For each message delivery confirm a result code is reported in the
format:
+CMGL: <index>,<stat>,<fo>,<mr>,,,<scts>,<dt>,<st>
Where
<index> - message position in the storage
<stat> - message status
<fo> - first octet of the message PDU
<mr> - message reference number
<scts> - arrival time of the message to the SC
<dt> - sending time of the message
<st> - message status as coded in the PDU
Test command
Example
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2.6.3.3 +CMGR - read message
+CMGR – read message
Execute command
AT+CMGR = <index> Reports the message with location value <index> from preferred
message storage <memr> (see +CPMS) in the format:
(PDU Mode)
+CMGR: <stat>,<length><CR><LF><pdu>
where
<stat> - status of the message
0 - new message
1 - read message
2 - stored message not yet sent
3 - store message already sent
<length> - length of the PDU in bytes.
<pdu> - message in PDU format according to GSM 3.40.
(Text Mode)
For the sent messages:
+CMGR: <stat>,<oa>,,<scts> [,<tooa>,<fo>,<pid>,<dcs>,<sca>,
<tosca>,<length>]<CR><LF><text>
For the received messages:
+CMGR: <stat>,<da>[,,<toda>,<fo>,<pid>,<dcs>,,
<sca>,<tosca>,<length>]<CR><LF><testo>
For the message delivery confirm:
+CMGR: <stat>,<fo>,<mr>,,,<scts>,<dt>,<st>
Where:
<stat> - status of the message
"REC UNREAD" - new received message unread
"REC READ" - received message read
"STO UNSENT" - message stored not yet sent
"STO SENT" - message stored already sent
<fo> - first octet of the message PDU
<mr> - message reference number
<scts> - arrival time of the message to the SC
<dt> - sending time of the message
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<st> - message status as coded in the PDU
<pid> - Protocol Identifier
<dcs> - Data Coding Scheme
<oa> - Originator address number
<da> - Destination address number
<sca> - Service Centre number
< tooa>,<toda >,<tosca> - type of number <oa>,<da>,<sca>
145 - number in international format (contains the "+")
129 - number in national format
<length> - text length
<text> - message text
The status of the message and entire message data unit <pdu> is
returned. If status of the message is 'received unread', status in the
storage changes to 'received read'.
Parameter: <index>
Note: if record number <index> on message storage memory is
empty, then an error message will be returned.
Read command
Write command
Test command
Example
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2.6.4 Message sending and writing
2.6.4.1 +CMGS - send message
+CMGS – send message
Execute command
(PDU Mode)
AT+CMGS = <length>
(PDU Mode)
Sends to the network a SMS message input as a PDU.
Parameter:
<length> = 8…176 - represents the length of the PDU to be sent in
bytes.
The device responds to the command with the prompt '>' and awaits
for the number of bytes of PDU specified.
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without sending the message send ESC char (0x1B
hexadecimal ).
If message is successfully sent to the network, then the result is sent
in the format:
+CMGS: <mr>
where <mr> is the message reference number.
If message sending fails for some reason, an error code is reported.
(Text Mode)
AT+CMGS=<da>
(Text Mode)
Sends to the network a SMS message input as a text message.
Parameter:
<da> = destination address number
The device responds to the command with the prompt '>' and awaits
for message text (max 160 characters).
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without sending the message send ESC char (0x1B
hexadecimal).
If message is successfully sent to the network, then the result is sent
in the format:
+CMGS: <mr>
where <mr> is the message reference number.
If message sending fails for some reason, an error code is reported.
Note: Care must be taken to ensure that during the command
execution, which might take several seconds, no other SIM
interacting commands are issued.
To avoid malfunctions is suggested to wait for the
+CMGS:<mr> or +CMS ERROR:<err> response
before issuing further commands.
Read command
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+CMGS – send message
Write command
Test command
Example
Reference GSM 07.05
SW release Version A
2.6.4.2 +CMSS - send message from storage
+CMSS – send message from storage
Execute command
AT+CMSS = <index> Sends to the network, the message which is already stored in the
<memw> storage (see +CPMS) at the location <index>.
Parameter: <index>
If message is successfully sent to the network, Sends to the network,
then the result is sent in the format:
+CMSS: <mr>
where <mr> is the message reference number.
If message sending fails for some reason, an error code is reported:
+CMS ERROR:<err>
Note: to store a message in the <memw> storage see command
+CMGW.
Care must be taken to ensure that during the command execution,
which might take several seconds, no other SIM interacting
commands are issued.
To avoid malfunctions is suggested to wait for the +CMGS:<mr> or
+CMS ERROR:<err> response before issuing further commands.
Read command
Write command
Test command
Example
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2.6.4.3 +CMGW - write message to memory
+CMGW – write message to memory
Execute command
(PDU Mode)
AT+CMGW = <length>
(Text Mode)
AT+CMGW = [<da>]
(PDU Mode)
Writes in the <memw> memory storage a new SMS message input as
a PDU.
Parameter:
<length> - represents the length of the PDU to be written in bytes.
The device responds to the command with the prompt '>' and awaits
for the number of bytes of PDU specified.
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without writing the message send ESC char (0x1B hexadecimal).
If message is successfully written in the memory, then the result is
sent in the format:
+CMGW: <index>
where <index> is the message location index in the memory
<memw>("SM").
If message storing fails for some reason, an error code is reported
(Text Mode)
Writes in the <memw> memory storage a new SMS message input as
Text.
Parameter:
<da> - destination address number
The device responds to the command with the prompt '>' and awaits
for the message text ( max 160 characters).
To complete the operation send Ctrl-Z char (0x1A hexadecimal) , to
exit without writing the message send ESC char (0x1B hexadecimal).
If message is successfully written in the memory, then the result is
sent in the format:
+CMGW: <index>
where <index> is the message location index in the memory
<memw>("SM").
If message storing fails for some reason, an error code is reported
Note: Care must be taken to ensure that during the command
execution, no other SIM interacting commands are issued.
To avoid malfunctions is suggested to wait for the +CMGS:<mr> or
+CMS ERROR:<err> response before issuing further commands.
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+CMGW – write message to memory
Read command
Write command
Test command
Example
Reference GSM 07.05
SW release Version A
2.6.4.4 +CMGD - delete message
+CMGD – delete message
Execute command
AT+CMGD =
<index>[,<delflag>] Deletes from memory the message/messages
Note: if the location to be deleted is empty, an error message is
reported.
Parameter:
<index> - message position index in the selected storage <memr>
<delflag> - delete mode selection flag
0 (or not present) - delete message at position <index>
1 - delete all received read messages
2 - delete all received read and all sent messages
3 - delete all received read and all written sent/unsent messages
4 - delete all messages.
Read command
Write command
Test command
Example
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2.7 Custom AT Commands
2.7.1 General configuration
2.7.1.1 #CAP - Change Audio Path
#CAP – change audio path
Execute command
AT#CAP = <n> Switches the active audio path depending on parameter <n>
Parameter:
<n> audio path
0 - audio path follows the Axe input (default at start up):
Axe = low - handsfree enabled
Axe = high - internal path enabled
1 - enables handsfree external mic/ear audio path
2 - enables internal mic/ear audio path
Note: The audio path are mutually exclusive, enabling one disables the
other.
When changing the audio path, the volume level is set at the previously
stored value for that audio path. (see AT+CLVL).
Read command
AT#CAP? Reports the active audio path in the format: #CAP: <n>.
Write command
Test command
AT#CAP=? Reports the supported values for the parameter <n>.
Example
Reference Telit GM862-PCS AT Command Specification
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2.7.1.2 #SRS - Select ringer sound
#SRS – select ringer sound
Execute command
AT#SRS =
<n>[,<timeout>] Set the ringer sound. The parameters are:
<n> - ringing tone
0 - current ringing tone
1 .. 12 - ringing tone number
<timeout> ringing tone playing timeout in seconds.
0 - no ringing tone playing, only tone setting
1 .. 60 - <n> tone playing for <timeout> seconds and successive
tone setting.
Note: When the command is issued with <timeout> >0, the <n>
ringing tone is played for <timeout> seconds and then stored as current
tone.
If command is issued with <timeout> = 0, the playing of the ringing is
stopped (if present) and <n> ringing tone is set as default.
If command is issued with <n> = 0 and <timeout> >0 then the default
ringing tone is played.
If both <n> and <timeout> are 0 then currently playing tone is set as
default and ringing is stopped.
Read command
AT#SRS? Reports current selected ringing and its status in the form:
#SRS: <n>,<status>
where:
<n> ringing tone number
1 .. 12
<status> ringing status
0 - selected but not playing
1 - currently playing
Write command
Test command
AT#SRS=? Reports the supported values for the parameters <n> and <timeout>
Example
Reference Telit GM862-PCS AT Command Specification
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2.7.1.3 #SRP –Select Ringer Path
#SRP – select ringer path
Execute command
AT#SRP=<n> Selects the audio path towards whom sending ringer sounds and all
signaling tones.
Parameter:
<n> - Ringer path number
0 - sound output towards current selected audio path (see
command #CAP)
1 - sound output towards handsfree
2 - sound output towards headset
3 - sound output towards Buzzer Output pin GPIO7
Note: In order to use the Buzzer Output an external circuitry must be
added to drive it properly from the GPIO7 pin, furthermore the
GPIO7 pin direction must be set to Buzzer output (Alternate function)
see command #GPIO.
Read command
AT#SRP? Reports the current ringer path setting in the format: #SRP:<n>.
Write command
Test command
AT#SRP=? Reports the supported values for the parameter <n>.
Example AT#SRP=?
#SRP=(0-3)
OK
AT#SRP=3
OK
Reference Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.4 #STM - Signalling Tones Mode
#STM – signalling tones mode
Execute command
Read command
AT#STM? Reports the current signaling tones status in the format:#STM: <mode>
Write command
AT#STM = <mode> Enables/disables the signaling tones output on the audio path selected
with #SRP command
Parameter :
<mode> - signaling tones status
<mode> = 0 - signaling tones disabled
<mode> = 1 - signaling tones enabled
Test command
AT#STM=? Reports supported range of values for <mode> parameter.
Example
Reference Telit GM862-PCS AT Command Specification
SW release Version B
2.7.1.5 #PCT – display PIN Counter
#PCT – display PIN counter
Execute command
Read command
AT#PCT? Reports the PIN/PUK or PIN2/PUK2 input remaining attempts,
depending on +CPIN requested password in the format:
#PCT:<n>
Note: If +CPIN requires the PIN then max 3 attempts are allowed,
after that the PUK code is requested; if even PUK is input wrong for
other three time then #PCT:0 and SIM remains blocked.
Write command
Test command
Example
Reference Telit GM862 AT-GPRS Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.6 #SHDN – Software Shut Down
#SHDN – software shutdown
Execute command
AT#SHDN After the issuing of this command device detaches from the network
and shuts down. Before definitive shut down an OK response is
returned.
Note: after the issuing of this command any previous activity is
terminated and the device will not respond to any further command.
To turn it on again Hardware pin ON/OFF must be tied low.
Read command
Write command
Test command
Example
Reference Telit GM862 AT-GPRS Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.7 #WAKE – Wake from Alarm mode
#WAKE – Wake from Alarm Mode
Execute command
AT#WAKE=0 After the issuing of this command device exits the "Alarm mode" and
enters the normal operating mode. After entering in normal operating
mode an OK response is returned.
With the execution of is command all Alarm activity (for example
alarm tone playing ) is immediately terminated.
If the command is issued during the normal operating mode then the
only action is to stop Alarm activity, if present, and return OK
response.
Read command
AT#WAKE? This command returns the operating mode status of the device in the
format:
#WAKE: <status>
where:
<status> - operating mode
0 - normal operating mode
1 - alarm mode
Note: The "alarm mode" is indicated by hardware pin CTS to the ON
status and DSR to the OFF status, while the "power saving" status is
indicated by a CTS - OFF and DSR - OFF status. The normal
operating status is indicated by DSR - ON.
During the "alarm mode" the device will not make any network scan
and will not register to any network and therefore is not able to dial
or receive any call or SMS, the only commands that can be issued to
the GM862-PCS in this state are the #WAKE and #SHDN, every
other command must not be issued during this state.
Write command
Test command
Example
Reference Telit GM862-PCS AT Command Specification
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.8 #QTEMP –Query Temperature overflow
#QTEMP – query temperature overflow
Execute command
Read command
AT#QTEMP? Queries the internal temperature sensor of the device for over
temperature. The result is reported in the format:
#QTEMP:<temp>
where
<temp> - over temperature indicator
<temp> = 0 - device temperature is in the working range
<temp> = 1- device temperature is out of the working range, may be
too high or too low.
Note: The device should not be operated out of its working temperature
range; if temperature is out of range proper functioning of the device is
not ensured.
Write command
AT#QTEMP = <mode> Sets the type of indication.
Parameter:
<mode> - type of indication
0 - result reported only when querying with #QTEMP?
1 - reserved for future use
2 – reserved for future use
Test command
#QTEMP=? Reports supported range of values for <mode> parameter.
Example
Reference Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.9 #SGPO –Set General Purpose Output
#SGPO – set general purpose output
Execute command
Read command
AT#SGPO? Reports the #SGPO command setting, hence the opposite status of the
open collector pin in the format: #SGPO: <stat>.
Write command
AT#SGPO = <stat> Sets the value of the general purpose output pin GPIO2 according to
<stat> parameter
Parameter:
<stat>
0 - output pin cleared to 0 (LOW)
1 - output pin set to 1 (HIGH)
Note: The GPIO2 is an OPEN COLLECTOR output, the command
sets the transistor base level, hence the open collector output is
negated:
AT#SGPO= 0 sets the open collector output HIGH
AT#SGPO= 1 sets the open collector output LOW
A pull up resistor is required on pin GPIO2.
Test command
AT#SGPO=? Reports the supported range of values of the command parameter
<stat>.
Example
Reference Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.10 #GGPI – Read General Purpose Input
#GGPI – read general purpose input
Execute command
Read command
AT#GGPI? Reports the read value for the input pin GPIO1in the format:
#GGPI: <dir>,<stat>
where
<dir> direction setting (see #GGPI=<dir> )
<stat> - logic value read from pin GPIO1
Note: Since the reading is done after the insulating transistor, the
reported value is the opposite of the logic status of the GPIO1 input
pin.
Write command
AT#GGPI = <dir> Set the General purpose input pin behavior depending on parameter
<dir>.
Parameter: <dir> - auxiliary input GPIO1 setting
<dir> = 0 - the read command reports the logic input level read from
GPIO1 pin.
<dir> = 1…255 - reserved for future use
Note: The device has an insulated input pin ( the input goes the base of
an internal decoupling transistor) which can be used as a logic general
purpose input. This command sets the read behaviour for this pin, since
only direct read report is supported, the issue of this command is not
needed.
In future uses the behavior of the read input may be more complex.
Test command
Example
Reference Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.11 #GPIO –General Purpose Input/Output pin control
#GPIO –General Purpose Input/Output pin control
Execute command
Read command
AT#GPIO=<pin>,2 Reports the read value for the pin GPIO<pin> in the format:
#GPIO: <dir>,<stat>
where
<dir> - current direction setting for the GPIO<pin>
<stat> - logic value read from pin GPIO<pin> in the case the pin
<dir> is set to input;
- logic value present in output of the pin GPIO<pin> in the case
the pin <dir> is currently set to output;
- no meaning value for the pin GPIO<pin> in the case
the pin <dir> is set to alternate function;
Note for GPIO1: Since the reading is done after the insulating
transistor, the reported value is the opposite of the logic status of the
GPIO1 input pin.
Write command
AT#GPIO =<pin>,
<mode>,<dir> Sets the value of the general purpose output pin GPIO<pin> according
to <dir> and <mode> parameter.
Not all configuration for the three parameters are valid.
Parameter:
<pin> - GPIO pin number
supported range is from 1 to 7, but GPIO1 is input only and GPIO2
is output only.
<dir> - GPIO pin direction
0 - pin direction in INPUT
1 - pin direction is OUTPUT
2 - pin direction is ALTERNATE FUNCTION *see Note
<mode> - its meaning depends on <dir> setting:
0 - no meaning if <dir> = 0 - INPUT
- output pin cleared to 0 (LOW) if <dir> = 1 - OUTPUT
- no meaning if <dir> = 2 - ALTERNATE FUNCTION
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Tri Band GPRS Data Terminal System Rev.1
1 - no meaning if <dir> = 0 - INPUT
- output pin set to 1 (HIGH) if <dir> = 1 - OUTPUT
- no meaning if <dir> = 2 - ALTERNATE FUNCTION
2 - Reports the read value from the input pin (see Read command) if
<dir> = 0 - INPUT
- Reports the read value from the input pin (see Read command) if
<dir> = 1 - OUTPUT
- Reports a no meaning value (see Read command) if <dir> = 2 -
ALTERNATE FUNCTION
Note: "ALTERNATE FUNCTION" value is valid only for pins
GPIO6 - alternate function is "Alarm Output" (see command +CALA)
GPIO7 - alternate function is "Buzzer Output" (see command #SRP)
While using the pins in the alternate function, the GPIO read/write
access to that pin is not accessible and shall be avoided.
Note: The GPIO2 is an OPEN COLLECTOR output, the command
sets the transistor base level, hence the open collector output is negated
Test command
AT#GPIO=? Reports the supported range of values of the command parameters
<pin>,<mode>,<dir>.
Example AT#GPIO=3,0,1
OK
AT#GPIO=3,2
#GPIO: 1,0
OK
AT#GPIO=4,1,1
OK
AT#GPIO=5,0,0
OK
AT#GPIO=6,2
#GPIO: 0,1
OK
AT#GPIO=7,0,0
OK
Reference Telit GM862-PCS AT Command Specification
SW release Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.12 #MONI – Monitor Cells
#MONI – monitor cell
Execute command
AT#MONI Reports the available data for cell and dedicated channel (if exists) in
the format:
#MONI: <netname> BSIC:<bsic> RxQual:<qual> LAC:<lac>
Id:<id> ARFCN:<arfcn> PWR:<dBm> dBm
or in the case the network name is not known:
#MONI: Cc:<cc> Nc:<nc> BSIC:<bsic> RxQual:<qual> LAC:<lac>
Id:<id> ARFCN:<arfcn> PWR:<dBm> dBm
or in the case in which the data of the adjacent cell are under
observation (number>0):
#MONI: Adj Cell<n> [LAC:<lac> Id:<id>] ARFCN:<arfcn>
PWR:<dBm> dBm
where:
netname = name of network operator
cc = country code
nc = network operator code
n = progressive number of adjacent cell
bsic = base station identification code
qual = quality of reception (0-7)
lac = localization area code
id = cell identifier
arfcn = assigned radio channel
dBm = received signal strength in dBm
Read command
Write command
AT#MONI =<number> Set the neighbor cell to extract data of the cell number <number>
Parameter: <number>
Test command
AT#MONI=?
(Version B)
Reports the available neighbour cells and current cell preset in the
format: #MONI: <CellNo, CellSet>
where:
<CellNo> - neighbour cells number
<CellSet> - cell preset = 0, …, n where 0 is the serving cell
Example
Note The refresh time of the measures is preset to 3 sec
Reference Telit GM862-PCS AT Command Specification
SW release Version A
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.13 #QSS – Query SIM Status
#QSS – query SIM status
Execute command
Read command
AT#QSS? Reports the query SIM status in the format:
#QSS: <mode>,<status>
where
<mode>: type of enabled notification
<mode> = 0 - query only
<mode> = 1 - send unsolicited indication (#USS) every change of state
<status>: current SIM status
<status> = 0 - SIM NOT INSERTED
<status> =1 - SIM INSERTED
Write command
AT#QSS = <mode> Set the type of notification.
If enabled (mode = 1) at any status change is send:
#USS: <status>
Parameter: <mode>
Test command
AT#QSS=? Returns the supported range of values of the parameter <mode>.
Example
Reference Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.14 #ACAL – Set Automatic Call
#ACAL – set automatic call
Execute command
Read command
AT#ACAL? Returns the current status in the format:
#ACAL: <mode>
Write command
AT#ACAL = <mode> Enable the automatic call.
Parameter:
<mode> = 0 – disable
<mode> = 1 – enable
If enabled, the transition OFF/ON of DTR causes an automatic data
call to the number stored in position number 1 of the phone book.
The &D command must be set to 2.
Test command
AT#ACAL=? Returns the supported range of values of the parameter <mode>.
Example
Reference Telit GM862-PCS AT Command Specification
SW release Future SW Version
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.15 #SMOV – SMS Overflow
#SMOV – SMS overflow
Execute command
Read command
AT#SMOV? Return the current status in the format: #SMOV: <mode>.
Write command
AT#SMOV= <mode> Enable the signalling of SMS overflow
Parameter:
<mode> = 0 - disable
<mode> = 1 - enable
If enable, when the maximum storage capacity has came, the
#USMO:<memo> network initiated notification is send.
Test command
AT#SMOV=? Returns the supported range of values of the parameter <mode>.
Example
Reference Telit GM862-PCS AT Command Specification
SW release Version A
2.7.1.16 #SHFEC – Set Handsfree echo canceller
#SHFEC – set handsfree echo canceller
Execute command
Read command
AT#SHFEC? Return the current status in the format: #SHFEC: <mode>.
Write command
AT#SHFEC= <mode> Set echo canceller on audio handsfree output.
Parameter <mode>:
0 - disable echo canceller for headset mode (default)
1 - enable, setting for handsfree mode
2…255 reserved
Note: This setting returns to default after power off.
Test command
AT#SHFEC=? Returns the supported range of values of the parameter <mode>.
Example
Reference Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.17 #HFMICG – Handsfree Microphone Gain
#HFMICG – handsfree microphone gain
Execute command
Read command
AT#HFMICG? Return the current status of handsfree input gain in the format:
#HFMICG: <level>
Write command
AT#HFMICG = <level> Set the microphone input gain
Parameter:
<level>: handsfree microphone input gain
0 - 7 handsfree microphone gain (+6dB/step)
8…255 reserved
Test command
AT#HFMICG=? Returns the supported range of values of the parameter <level>.
Example
Reference Telit GM862-PCS AT Command Specification
SW release Version A
2.7.1.18 #HSMICG – Handset Microphone Gain
#HSMICG – handset microphone gain
Execute command
Read command
AT#HSMICG? Return the current status of handset input gain in the format:
#HSMICG: <level>
Write command
AT#HSMICG = <level> Set the microphone input gain
Parameter:
<level>: handset microphone input gain
0 - 7 handset microphone gain (+6dB/step)
8…255 reserved
Test command
AT#HSMICG=? Returns the supported range of values of the parameter <level>.
Example
Reference Telit GM862-PCS AT Command Specification
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Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.7.1.19 #SHFSD – Set Handsfree side tone
#SHFSD – set handsfree side tone
Execute command
Read command
AT#SHFSD? Return the current status in the format:
#SHFSD: <mode>
Write command
AT#SHFSD = <mode> Set the sidetone on handsfree audio output.
Parameter
<mode>:
0 - disabled - headset mode (default)
1 - enabled - handsfree mode
2…255 reserved
Note: This setting returns to default after power off.
Test command
AT#SHFSD=? Returns the supported range of values of the parameter <mode>.
Example
Reference Telit GM862-PCS AT Command Specification
SW release Version A
2.7.1.20 #/ – Repeat last command
#/ – Repeat last command
Execute command
AT#/
It is used to execute again the last received command.
Note: This command replaces the A/ command
Read command
Write command
Test command
Example
Reference Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.7.1.21 #BND – Select Band (DCS 1800 or PCS 1900)
#BND – Select Band (DCS1800 or PCS1900)
Execute command
Read command
AT#BND? Return the current band selected in the format:
#BND: <band>
Write command
AT#BND = <band> Set the band parameter to the Band value.
Parameter
<band>:
0 - DCS 1800MHz
1 - PCS 1900MHz
Note: This setting is maintained even after power off.
Test command
AT#BND=? Returns the supported range of values of the parameter <band>.
Example
Reference Telit GM862-PCS AT Command Specification
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Tri Band GPRS Data Terminal System Rev.1
2.8 FAX Class 1 Commands
2.8.1 General configuration
2.8.1.1 +FCLASS - select active service class
+FCLASS - select active service class
Execute command
Read command
AT+FCLASS? Returns the current configuration value of the parameter <n>.
Write command
AT+FCLASS= <n> Set the GM862-PCS in specified connection mode (data, fax, voice), hence
all the calls done after, will be data or voice.
Parameter:
<n>: 0 = data
<n>: 1 = fax class 1
<n>: 8 = voice
Test command
AT+FCLASS=? Returns all supported values of the parameters <n>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications / GSM 07.07
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.1.2 +FMI – Report manufacturer ID
+FMI – Report manufacturer ID
Execute command
Read command
AT+FMI? Reports the manufacturer ID
Write command
Test command
Example AT+FMI?
Telit Mobile Terminals
OK
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.1.3 +FMM? – Report model ID
+FMM – Report model ID
Execute command
Read command
AT+FMM? Reports the model ID
Write command
Test command
Example AT+FMM?
GM862-PCS - GSM900/1800 voice/data/fax module
OK
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.1.4 +FMR – Report revision ID
+FMR – Report revision ID
Execute command
Read command
AT+FMR? Reports the software revision ID
Write command
Test command
Example AT+FMR?
1.01.000 CS988
OK
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.2 Transmission/Reception control
2.8.2.1 +FTS – Stop Transmission and pause
+FTS – Stop transmission and pause
Execute command
Read command
Write command
AT+FTS=<time> This command causes the modem to terminate a transmission and wait
for <time> 10 ms intervals before responding with the OK result code.
Parameter <time>
0-255 : length of time in 10ms intervals of the pause
Test command
AT+FTS=? Returns all supported values of the parameters <time>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.2.2 +FRS – Wait for receive silence
+FRS – Wait for receive silence
Execute command
Read command
Write command
AT+FRS=<time> this command causes the modem to listen and report an OK result code
when silence has been detected for the specified period of time.
This command when the required silence period is detected or when
the DTE sends another character other than XON or XOFF.
Parameter <time>
0-255 : length of time in 10ms intervals of the pause
Test command
AT+FTS=? Returns all supported values of the parameters <time>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.2.3 +FTM – Transmit data modulation
+FTM – Transmit data
Execute command
Read command
Write command
AT+FTM=<mod> this command causes the module to transmit facsimile data using the
modulation defined by the parameter <mod>.
parameter <mod> : carrier modulation
24 - V27ter/2400 bps
48 - V27ter/4800 bps
72 - V29/7200 bps
96 - V29/9600 bps
Test command
AT+FTM=? Returns all supported values of the parameters <mod>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.2.4 +FRM – Receive data modulation
+FRM – Receive data modulation
Execute command
Read command
Write command
AT+FRM=<mod> this command causes the module to receive facsimile data using the
modulation defined by the parameter <mod>.
parameter <mod> : carrier modulation
24 - V27ter/2400 bps
48 - V27ter/4800 bps
72 - V29/7200 bps
96 - V29/9600 bps
Test command
AT+FRM=? Returns all supported values of the parameters <mod>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.2.5 +FTH – Transmit data with HDLC framing
+FTH – Transmit data with HDLC framing
Execute command
Read command
Write command
AT+FTH=<mod> this command causes the module to transmit facsimile data using
HDLC protocol and the modulation defined by the parameter <mod>.
parameter <mod> : carrier modulation
3 - V21/300 bps
Test command
AT+FTH=? Returns all supported values of the parameters <mod>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.2.6 +FRH – Receive data with HDLC framing
+FRH – Receive data data with HDLC framing
Execute command
Read command
Write command
AT+FRH=<mod> this command causes the module to receive facsimile data using HDLC
protocol and the modulation defined by the parameter <mod>.
parameter <mod> : carrier modulation
3 - V21/300 bps
Test command
AT+FRH=? Returns all supported values of the parameters <mod>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.3 Serial port control
2.8.3.1 +FLO – Select flow control specified by type
+FLO – Select flow control specified by type
Execute command
Read command
Write command
AT+FLO=<type> Selects the flow control behavior of the serial port in both directions:
from DTE to DTA and from DTA to DTE
Parameter:
<type> - flow control option for the data on the serial port
0 - flow control None
1 - flow control Software (XON-XOFF)
2 - flow control Hardware (CTS-RTS)
Note: This command is a shortcut of the +IFC command.
Test command
AT+FLO=? Returns all supported values of the parameters <type>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.8.3.2 +FPR – Select serial port rate
+FPR – Select serial port rate
Execute command
Read command
Write command
AT+FPR=<rate> Selects the the serial port speed in both directions: from DTE to DTA
and from DTA to DTE. When autobauding is selected, then the speed
is detected automatically.
Parameter:
<rate> - serial port speed selection
0 - autobauding
Test command
AT+FPR=? Returns all supported values of the parameters <rate>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
2.8.3.3 +FDD – Double escape character replacement control
+FDD – Double escape character replacement control
Execute command
Read command
Write command
AT+FDD=<mode> This command sets the double escape character replacement behavior
of the module depending on the parameter <mode>.
Parameter
<mode>= 0
DCE decode of <DLE><SUB>: <DLE><DLE> or discard
DCE encode of <1/0><1/0>: <DLE><DLE><DLE><DLE>
Test command
AT+FDD=? Returns all supported values of the parameters <mode>.
Example
Reference ITU T.31 and TIA/EIA-578-A specifications
SW release Version A
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Tri Band GPRS Data Terminal System Rev.1
2.9 Easy GPRS Extension
2.9.1 Overview
The Easy GPRS feature applies only to the Telit GM862-PCS and allows a Telit GM862-PCS user
to contact a device in internet and establish with it a raw data flow over the GPRS and Internet
networks.
This feature can be seen as a way to obtain a "virtual" serial connection between the Application
Software on the Internet machine involved and the controller of the Telit GM862-PCS module,
regardless of all the software stacks underlying.
An example of the protocol stack involved in the devices is reported:
This particular implementation allows to the devices interfacing to the Telit GM862-PCS module
the use of the GPRS and Internet packet service without the need to have an internal TCP/IP stack
since this function is embedded inside the module.
2.9.2 Easy GPRS definition
The Easy GPRS feature provides a way to replace the need of an Internet TCP/IP stack at the
terminal equipment side. The steps that will be required to obtain a virtual serial connection (that is
actually a socket) to the Internet peer are:
a) configuring the GPRS Access
b) configuring the embedded TCP/IP stack behaviour
c) defining the Internet Peer to be contacted
d) request the GPRS and socket connections to be opened (host is connected)
e) exchange raw data
f) close the socket and GPRS context
Remote
Controller
Device
Device
(Internet)
Local
Remote
Application
Application
TCP/UDP
EASY
EASY
TCP/UDP
GPRS
GPRS
IP
IP
IP
IP
Serial
Data
Line on
Driver
Board
L2
L2
V.24
V.24
L1
L1
Terminal
Equipment
Remote
Device
(Internet)
Telit
GM862-GPRS
networks
<<<---------------------------------- Virtual Serial link ---------------------------------->>>
network interworking
Mobile Terminal GPRS Network and Internet
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Tri Band GPRS Data Terminal System Rev.1
All these steps are achieved through AT commands.
As for common modem interface, two logical status are involved: command mode and data traffic
mode.
- In Command Mode (CM), some AT commands are provided to configure the Data Module
Internet stack and to start up the data traffic.
- In data traffic mode (Socket Mode, SKTM), the client can send/receive a raw data stream which
will be encapsulated in the previously configured TCP / IP packets which will be sent to the
other side of the network and viceversa. Control plane of ongoing socket connection is
deployed internally to the module.
2.9.2.1 Configuring the GPRS access
The GPRS access configuration is done by setting:
- the GPRS context number 1 parameters (see +CGDCONT command)
- the Authentication parameters: User Name and Password (see commands #USERID, #PASSW)
2.9.2.2 Configuring the embedded TCP/IP stack
The TCP/IP stack behaviour must be configured by setting:
- the packetizer default packet size (see command #PKTSZ)
- the data sending timeout (see command #DSTO)
- the socket inactivity timeout (see command #SKTTO)
2.9.2.3 Defining the Internet peer to be contacted
As last setting definition, the host to be contacted and on which port/protocol must be set :
- the socket definition (see command #SKTSET)
This command permits also to specify the host name instead of its IP address, if a host name is
given to the set command, then the module stores it as a host nick name. It is care of the module
user to guarantee that the host nick name provided corresponds to an existing internet peer.
If an host nick name has been given then, while opening the connection in response to the
AT#SKTOP command, the module will autonomously activate a GPRS connection and query its
DNS to obtain the IP address relative to the host nick name provided. This process of context
activation and DNS query may require a bit more time and requires that the GPRS network
coverage is good enough to permit data transfers.
2.9.2.4 Open the connection with the internet host
With the AT#SKTOP all the process required to connect with the internet host starts:
- GM862-PCS activates the first context
- GM862-PCS proceeds to the authentication with the parameters specified on par. 2.9.2.1
- Eventually does the DNS query to resolve the IP address of the host name internet peer
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- GM862-PCS establishes a TCP/UDP (depending on the parameter request) connection with the
given internet host
- Once the connection is up the module reports the code: CONNECT
From this moment the data incoming in the serial port is packet and sent to the Internet host, while
the data received from the host is serialised and flushed to the Terminal Equipment.
2.9.2.5 Close the Socket and deactivate the context
The connection can be closed because of:
- remote host TCP connection close
- socket inactivity timeout
- Terminal Equipment by issuing the escape sequence "+++"
- Network deactivation
Note: if in the raw data to be sent there's an escape sequence, then the TE must work it out and sent
it in a different fashion to guarantee that the connection is not closed.
The pause time is defined in the parameter S12.
On the reception of an escape sequence the GM862-PCS closes the connection, deactivates the
GPRS context returning to command mode and issuing the NO CARRIER code.
2.9.3 Known limitations
The implementation of the EASY GPRS feature has the following known limitations:
- Only one socket can be opened at a time, no multiple socket connections can be made;
- Only the first GPRS context is associated with this feature;
- The closing of a socket implies always the deactivation of the GPRS context associated;
- It is taken for granted that external processor will be able to handle at least a limited v.24
implementation: RTS, CTS and, highly recommended, DCD lines; this because software flow
control is not applicable to the feature;
- Only Mobile initiated connections can be made, it is not possible to receive incoming TCP
connection requests;
- Due to the particularity of this feature, the flow control of both the directions uplink and
downlink is interlocked
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Tri Band GPRS Data Terminal System Rev.1
2.9.4 Easy GPRS custom AT command Definition
2.9.4.1 #USERID – Authentication User ID control
#USERID – Authentication User ID control
Execute command
Read command
AT#USERID? Reports the current value of the parameter <user>.
Write command
AT#USERID="<user>" This command sets the user identification string to be used during the
authentication step to be the string <user>.
Parameter:
<user> - authentication User ID
- any string value up to max length reported in the Test command.
Test command
AT#USERID=? Returns the maximum allowed length of the string parameter <user>.
Example AT#USERID = "myName"
OK
AT#USERID?
#USERID: "myName"
OK
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.2 #PASSW – Authentication Password control
#PASSW – Authentication Password control
Execute command
Read command
AT#PASSW=? Reports the maximum password length.
Write command
AT#PASSW="<pwd>" This command sets the user password string to be used during the
authentication step to be the string <pwd>.
Parameter:
<pwd> - authentication password
- any string value up to max length reported in the Test command.
Test command No test command allowed, for password security
Example AT#PASSW = "myPassword"
OK
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.3 #PKTSZ –Packet Size control
#PKTSZ –Packet Size control
Execute command
Read command
AT#PKTSZ? Reports the current value of the parameter <size>.
Write command
AT#PKTSZ=<size> This command sets the default packet size to be used by the
TCP/UDP/IP stack for data sending.
Parameter:
<size> - packet size in bytes
0 - automatically chosen by the device
1…512 - packet size in bytes
Test command
AT#PKTSZ=? Returns the allowed values for the parameter <size>.
Example AT#PKTSZ = 100
OK
AT#PKTSZ?
#PKTSZ: 100
OK
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.4 #DSTO – Data Sending Timeout control
#DSTO –Data Sending Timeout control
Execute command
Read command
AT#DSTO? Reports the current value of the parameter <time>.
Write command
AT#DSTO=<time> This timeout applies when the data to be sent is less that one full packet
size and whose sending would have been delayed for a undefined time
until new data to be sent is received and the full packet size is reached.
This command sets the maximum time that the module awaits before
sending anyway a packet whose size is less than the default one.
Parameter:
<time> - packet sending timeout in 100ms units
0 - no timeout, wait forever for packets to be completed before send.
1…255 hundreds of ms
Test command
AT#DSTO=? Returns the allowed values for the parameter <time>.
Example AT#DSTO = 10 ( 1 sec. Timeout )
OK
AT#DSTO?
#DSTO: 10
OK
NOTE In order to avoid possible low performances issues, it is suggested to
set the <time> parameter to a value greater than 5
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.5 #SKTTO – Socket inactivity timeout control
#SKTTO – Socket inactivity timeout control
Execute command
Read command
AT#SKTTO? Reports the current value of the parameter <time>.
Write command
AT#SKTTO=<time> This timeout applies when the no data is exchanged in the socket for a
long time and therefore the socket connection is automatically closed
and the GPRS context deactivated.
This command sets the maximum time that the module awaits without
data exchange on the socket before closing the socket and deactivating
the GPRS context.
Parameter:
<time> - socket inactivity timeout in seconds units
0 - no timeout.
1…65535 s
Test command
AT#SKTTO=? Returns the allowed values for the parameter <time>.
Example AT#SKTTO = 30 ( 30 sec. Timeout )
OK
AT#SKTTO?
#SKTTO: 30
OK
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.6 #SKTSET – Socket definition control
#SKTSET – Socket definition control
Execute command
Read command
AT#SKTSET?
Reports the current value of the parameters
<socket type>,<remote port>, <remote address>.
Write command
AT#SKTSET=<socket
type>, <remote port>,
"<remote address>"
This command sets the socket parameters values.
Parameter:
<socket type> - socket protocol type
0 - TCP
1 - UDP
<remote port> - remote host port to be opened
0…65535 - port number
<remote address> - address of the remote host
this parameter can be either:
- any valid IP address in the format: xxx.xxx.xxx.xxx
- any host name to be solved with a DNS query in the format: <host
name>
Test command
AT#SKTSET=? Returns the allowed values for the parameters.
Example AT#SKTSET = 0,1024,"123.124.020.007"
OK
Or
AT#SKTSET=0,1024,"www.telit.net"
OK
NOTE The resolution of the host name is done when opening the socket,
therefore if an invalid host name is given to the #SKTSET command,
then no error message will be issued to the #SKTSET command.
The DNS Query to be successful requests that:
- the GPRS context 1 is correctly set with AT+CGDCONT
- the authentication parameters are set (#USERID, #PASSW)
- the GPRS coverage is enough to permit a connection
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.7 #SKTOP – Socket Open command
#SKTOP – Socket Open Command
Execute command
AT#SKTOP Activates the context number 1, proceeds with the authentication with
the user ID and password previously set with #USERID #PASSW
commands, and opens a socket connection with the host specified in
the #SKTSET command. Eventually before opening the socket
connection it issues automatically a DNS query to solve the IP address
of the host name.
If the connection succeeds a CONNECT indication is sent, otherwise a
NO CARRIER indication is sent.
Read command
Write command
Test command
Example AT#SKTOP
… GPRS context activation, authentication and socket open…
CONNECT
Reference Telit specifications
SW release Version C
2.9.4.8 #QDNS – Query DNS
#QDNS – Query DNS
Execute command
AT#QDNS="<host
name>"
This command activates a context, authenticates and proceeds to
execute a DNS query to solve the host name into an IP address.
If the DNS query is successful then the IP address will be reported in
the result code:
#QDNS:"<host name>",< IP address>
the <IP address> is in the format: xxx.xxx.xxx.xxx
else
#QDNS:"<host name>", NOT SOLVED
Read command
Write command
Test command
NOTE This command requires that the first context parameters, the
authentication par. are correctly set and that the GPRS network is
present.
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.9 #SKTSAV – Socket Parameters Save Command
#SKTSAV – Socket Parameters Save Command
Execute command
AT#SKTSAV Saves the actual Parameters of the Socket in the NVM of the device.
The values stored are:
- User Name
- Password
- Packet Size
- Socket inactivity timeout
- Data sending timeout
- Socket type (UDP/TCP)
- Remote port
- Remote address
Read command
Write command
Test command
Example AT#SKTSAV
OK
…socket parameters have been saved in NVM
Note If some parameters have not been previously specified then a default
value will be taken.
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.9.4.10 #SKTRST – Socket Parameters Reset Command
#SKTRST – Socket Parameters Reset Command
Execute command
AT#SKTRST Resets the actual Parameters of the Socket in the NVM of the device to
the default ones.
The values reset are:
- User Name (none)
- Password (none)
- Packet Size
- Socket inactivity timeout
- Data sending timeout
- Socket type (UDP/TCP)
- Remote port (none)
- Remote address (none)
Read command
Write command
Test command
Example AT#SKTRST
OK
…socket parameters have been reset
Reference Telit specifications
SW release Version C
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Tri Band GPRS Data Terminal System Rev.1
2.10 Easy Camera custom commands
2.10.1.1 #CAMON – Camera ON
#CAMON – Camera ON Command
Execute command
AT#CAMON
Turns ON the Camera.
Read command
Write command
Test command
Example AT#CAMON
OK
… camera is now powered up.
Reference Telit specifications
SW release Version D
2.10.1.2 #CAMOFF – Camera OFF
#CAMOFF – Camera off Command
Execute command
AT#CAMOFF
Turns OFF the Camera.
Read command
Write command
Test command
Example AT#CAMOFF
OK
… camera is now powered down.
Reference Telit specifications
SW release Version D
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Tri Band GPRS Data Terminal System Rev.1
2.10.1.3 #TPHOTO – Camera Take Photo
#TPHOTO – Camera Take Photo Command
Execute command
AT#TPHOTO
Commands the CAMERA to take the photo and stores it in the GM862
memory.
Read command
Write command
Test command
NOTE The photo is kept in the GM862-PCS RAM memory, therefore after a
power off it is lost.
There's only 1 position for the photo, every photo will overwrite the
previous.
The photo is taken during IDLE time, if the mobile is busy on network
operations, (e.g. during a call) the photo cannot be taken.
Example AT#TPHOTO
OK
… the camera has taken the photo and it is now stored on the GM862
memory.
Reference Telit specifications
SW release Version D
2.10.1.4 #RPHOTO – Camera Read Photo
#RPHOTO – Camera Read Photo Command
Execute command
AT#RPHOTO
After this command the GM862 starts to flush the photo in its memory
to the serial line, ending it with the Ok code..
Read command
Write command
Test command
NOTE The photo is flushed as hexadecimal characters in the format selected.
Example AT#RPHOTO
xxxxxxxxxxxx (binary digits of the JPEG image)
<cr><lf>OK<cr><lf>
… the photo has been flushed to the serial line.
Reference Telit specifications
SW release Version D
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Tri Band GPRS Data Terminal System Rev.1
2.10.1.5 #CSQUAL – Camera Select Quality of Photo
#CSQUAL - Camera Select Quality of Photo
Execute command
Read command
AT#CSQUAL?
Reports the current value of the parameter <qual>
Write command
AT#CSQUAL=<qual> This command sets the quality of the photo stored on the memory of
the GM862-PCS
Parameter:
<qual> - photo quality
0 - low (Jpeg compression high - low quality of picture)
1 - medium (Jpeg compression medium - med. quality of picture)
2 - high ( Jpeg compression low - high quality of picture) - default
Test command
AT#CSQUAL=? Returns the allowed values for the parameters.
NOTE Increasing the photo quality increases its size.
Example AT#CSQUAL=2
OK
Reference Telit specifications
SW release Version D
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Tri Band GPRS Data Terminal System Rev.1
2.10.1.6 #CSMODE – Camera Select Operating MODE
#CSMODE - Camera Select Operating MODE
Execute command
Read command
AT#CSMODE?
Reports the current value of the parameter
<mode>
Write command
AT#CSMODE=<mode> This command sets the operating mode of the GM862-PCS camera
Parameter:
<mode> - camera operating mode
0 - daylight (short exposure) - default
1 - nightlight (long exposure)
Test command
AT#CSMODE=? Returns the allowed values for the parameters.
Example AT#CSMODE=0
OK
Reference Telit specifications
SW release Version D
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Tri Band GPRS Data Terminal System Rev.1
3 Conformity Assessment
The Telit GM862-PCS module is assessed to be conform to the R&TTE Directive as stand-alone
product, so if you use them it will not be required any further test effort on the modules.
The Telit GM862-PCS module is conform with the following European Union Directives:
¨ R&TTE Directive 1999/5/EC (Radio Equipment & Telecommunications Terminal Equipments)
¨ Low Voltage Directive 73/23/EEC and product safety
¨ Directive 89/336/EEC for conformity for EMC
In order to satisfy the essential requisite of the R&TTE 99/5/EC directive, the GM862PCS module is
compliant with the following standards:
• GSM (Radio Spectrum). Standard: EN 301 511 and 3GPP 51.010-1
• EMC (Electromagnetic Compatibility). Standards: EN 301 489-1 and EN 301 489-7
In this document and the Hardware User Guide, Software User Guide all the information you may
need for developing a product meeting the R&TTE Directive is included.
Furthermore the Telit GM862-PCS module is FCC Approved as module to be installed
in other devices. This device is to be used only for fixed and mobile applications. If
the final product after integration is intended for portable use, a new application and
FCC is required.
The Telit GM862-PCS module is conform with the following US Directives:
¨ Use of RF Spectrum. Standards: FCC 47 Part 24 (GSM 1900)
¨ EMC (Electromagnetic Compatibility). Standards: FCC47 Part 15
To meet the FCC's RF exposure rules and regulations:
- The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20
cm from all the persons and must not be co-located or operating in conjunction with any other antenna
or transmitter.
- The antenna(s) used for this module must not exceed 7 dBi for mobile and fixed or mobile operating
configurations.
- Users and installers must be provided with antenna installation instructions and transmitter operating
conditions for satisfying RF exposure compliance.
Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any
regulatory questions and to have their complete product tested and approved for FCC compliance.
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Tri Band GPRS Data Terminal System Rev.1
List of acronyms
ACM Accumulated Call Meter
ASCII American Standard Code for Information Interchange
AT Attention commands
CB Cell Broadcast
CBS Cell Broadcasting Service
CCM Call Control Meter
CLIP Calling Line Identification Presentation
CLIR Calling Line Identification Restriction
CMOS Complementary Metal-Oxide Semiconductor
CR Carriage Return
CSD Circuit Switched Data
CTS Clear To Send
DAI Digital Audio Interface
DCD Data Carrier Detected
DCE Data Communications Equipment
DRX Data Receive
DSR Data Set Ready
DTA Data Terminal Adaptor
DTE Data Terminal Equipment
DTMF Dual Tone Multi Frequency
DTR Data Terminal Ready
EMC Electromagnetic Compatibility
ETSI European Telecommunications Equipment Institute
FTA Full Type Approval (ETSI)
GPRS General Radio Packet Service
GSM Global System for Mobile communication
HF Hands Free
IMEI International Mobile Equipment Identity
IMSI International Mobile Subscriber Identity
IRA Internationale Reference Alphabet
ITU International Telecommunications Union
IWF Inter-Working Function
LCD Liquid Crystal Display
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Tri Band GPRS Data Terminal System Rev.1
LED Light Emitting Diode
LF Linefeed
ME Mobile Equipment
MMI Man Machine Interface
MO Mobile Originated
MS Mobile Station
MT Mobile Terminated
OEM Other Equipment Manufacturer
PB Phone Book
PDU Protocol Data Unit
PH Packet Handler
PIN Personal Identity Number
PLMN Public Land Mobile Network
PUCT Price per Unit Currency Table
PUK PIN Unblocking Code
RACH Random Access Channel
RLP Radio Link Protocol
RMS Root Mean Square
RTS Ready To Send
RI Ring Indicator
SCA Service Center Address
SIM Subscriber Identity Module
SMD Surface Mounted Device
SMS Short Message Service
SMSC Short Message Service Center
SS Supplementary Service
TIA Telecommunications Industry Association
UDUB User Determined User Busy
USSD Unstructured Supplementary Service Data