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| Document Description | Modem User Manual |
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| Creation Date | 1997-02-20 12:00:56 |
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| Document Title | Modem User Manual |
AT Commands for
RCV56ACx, RCV336ACx,
RCV288ACx, and RCV144ACx Modems
Reference Manual
(Preliminary)
Order No. 1048
Rev. 4, February 20, 1997
AT Command Reference Manual
NOTICE
Information furnished by Rockwell International Corporation is believed to be accurate and reliable. However, no
responsibility is assumed by Rockwell International for its use, nor any infringement of patents or other rights of
third parties which may result from its use. No license is granted by implication or otherwise under any patent
rights of Rockwell International other than for circuitry embodied in Rockwell products. Rockwell International
reserves the right to change circuitry at any time without notice. This document is subject to change without
notice.
K56flex is a trademark of Lucent Technologies and Rockwell International.
ConfigurACE is a trademark of Rockwell International.
MNP is a registered trademark of Microcom, Inc.
Hayes is a registered trademark of Hayes Microcomputer Products, Inc.
ii
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AT Command Reference Manual
PREFACE
This manual supersedes the following manuals:
1.
AT Command Reference Manual for the RC288ACi and RC288ACL Modem Families (Order No. 1048, Rev.3, January
9, 1996).
2.
Addendum 1 to AT Commands for RC288ACx and RC144ACx Modem Families (Order No. 1048R3A1, Rev.1, August
2, 1996).
This revision incorporates Addendum 1 to AT Commands for RC288ACx and RC144ACx Modem Families (Order No.
1048R3A1, Rev.1, August 2, 1996); adds K56flex command (+MS), connect and carrier messages; and adds V.80
commands.
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This page is intentionally blank.
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AT Command Reference Manual
Table of Contents
1. INTRODUCTION ...........................................................................................................................................................1-1
1.1 OVERVIEW ..........................................................................................................................................................1-1
1.1.1 Command Syntax ........................................................................................................... .........................1-1
1.1.2 Command Descriptions............................................................................................................................1-1
1.1.3 Call Progress and Blacklisting Parameters ...............................................................................................1-2
1.1.4 ConfigurACE II for Windows Utility Program............................................................................... ..............1-2
1.2 REFERENCE DOCUMENTATION ........................................................................................................................1-2
2. COMMAND SYNTAX ....................................................................................................................................................2-1
2.1 DTE/DCE INTERCHANGE CIRCUITS...................................................................................................................2-1
2.2 COMMAND SYNTAX AND GUIDELINES..............................................................................................................2-1
2.2.1 DTE Commands ......................................................................................................................................2-1
2.2.2 DTE Command Lines............................................................................................................................... 2-1
2.3 AT COMMAND GUIDELINES ............................................................................................................................... 2-1
2.3.1 Basic Command Syntax...........................................................................................................................2-1
2.3.2 Extended Command Syntax ....................................................................................................................2-1
3. AT COMMAND SET......................................................................................................................................................3-1
3.1 AT COMMAND GUIDELINES ............................................................................................................................... 3-1
3.1.1 AT Commands, DTE Adaption .................................................................................................................3-1
3.1.2 AT Command Format ........................................................................................................ ......................3-1
3.1.3 Escape Code Sequence ..........................................................................................................................3-1
3.2 AT COMMAND SET .............................................................................................................................................3-2
3.2.1 AT Commands ........................................................................................................................................3-2
A/ - Re-execute Command ........................................................................................................ ...........3-2
AT= x - Write to Selected S-Register ........................................................................................... .........3-2
AT? - Read Selected S-Register ...........................................................................................................3-2
A - Answer ..................................................................................................................... ......................3-2
Bn - CCITT or Bell ................................................................................................................................3-2
Cn - Carrier Control ........................................................................................................... ...................3-3
Dn - Dial ...............................................................................................................................................3-3
En - Command Echo ............................................................................................................................3-4
Fn - Select Line Modulation (RC144 Models Only) ................................................................................3-5
Hn - Disconnect (Hang-Up)...................................................................................................................3-6
In - Identification ...................................................................................................................................3-6
Ln - Speaker Volume ............................................................................................................................3-6
Mn - Speaker Control ........................................................................................................... ................3-7
Nn - Automode Enable .........................................................................................................................3-7
On - Return to On-Line Data Mode .......................................................................................................3-7
P - Set Pulse Dial Default .....................................................................................................................3-8
Qn - Quiet Results Codes Control............................................................................................... ..........3-8
Sn - Read/Write S-Register ..................................................................................................................3-8
T - Set Tone Dial Default ......................................................................................................................3-9
Vn - Result Code Form .......................................................................................................... ...............3-9
Wn - Connect Message Control ............................................................................................................3-9
Xn - Extended Result Codes............................................................................................................... 3-10
Yn - Long Space Disconnect............................................................................................................... 3-13
Zn - Soft Reset and Restore Profile ............................................................................................ ........3-13
3.2.2 AT& Commands ....................................................................................................................................3-14
&Cn - RLSD (DCD) Option.................................................................................................................. 3-14
&Dn - DTR Option ..............................................................................................................................3-14
&Fn - Restore Factory Configuration (Profile).................................................................................. ....3-14
&Gn - Select Guard Tone ........................................................................................................ ...........3-15
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&Jn - Telephone Jack Control............................................................................................................. 3-15
&Kn - Flow Control .............................................................................................................................3-15
&Ln - Leased Line Operation .............................................................................................................. 3-15
&Mn - Asynchronous/Synchronous Mode Selection ............................................................................ 3-16
&Pn - Select Pulse Dial Make/Break Ratio .......................................................................................... 3-16
&Qn - Sync/Async Mode.......................................................................................................... ...........3-17
&Rn - RTS/CTS Option....................................................................................................................... 3-18
&Sn - DSR Override ........................................................................................................................... 3-18
&Tn - Test and Diagnostics................................................................................................................. 3-18
&V - Display Current Configuration and Stored Profiles ....................................................................... 3-19
3.2.3 &V1 - Display Last Connection Statistics ................................................................................................ 3-19
&Wn - Store Current Configuration .............................................................................................. .......3-20
&Xn - Select Synchronous Clock Source............................................................................................. 3-20
&Yn - Designate a Default Reset Profile.............................................................................................. 3-20
&Zn=x - Store Telephone Number ...................................................................................................... 3-20
3.2.4 AT% Commands ................................................................................................................................... 3-21
%En - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward ........................ 3-21
%L - Line Signal Level ........................................................................................................................ 3-21
%Q - Line Signal Quality..................................................................................................................... 3-21
%7 - Plug and Play Serial Number ...................................................................................................... 3-22
%8 - Plug and Play Vendor ID and Product Number............................................................................ 3-22
3.2.5 AT\ Commands ..................................................................................................................................... 3-23
\Kn - Break Control .............................................................................................................................3-23
\Nn - Operating Mode .........................................................................................................................3-24
\Vn - Single Line Connect Message Enable......................................................................................... 3-24
3.2.6 AT+ Commands .................................................................................................................................... 3-25
+MS - Select Modulation..................................................................................................................... 3-25
+Hn - Enable/Disable RPI and DTE Speed.......................................................................................... 3-28
3.2.7 AT** Command ..................................................................................................................................... 3-29
** - Download to Flash Memory ..........................................................................................................3-29
3.2.8 AT- Commands ..................................................................................................................................... 3-30
-SDR=n - Enable/Disable Distinctive Ring ........................................................................................... 3-30
3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS....................................................................... 3-31
3.3.1 AT% Commands ................................................................................................................................... 3-31
%C - Enable/Disable Data Compression ............................................................................................. 3-31
3.3.2 AT\ Commands ..................................................................................................................................... 3-31
\An - Select Maximum MNP Block Size............................................................................................... 3-31
\Bn - Transmit Break to Remote..........................................................................................................3-31
3.4 MNP 10 COMMANDS.........................................................................................................................................3-32
3.4.1 AT) Commands ..................................................................................................................................... 3-32
)Mn - Enable Cellular Power Level Adjustment.................................................................................... 3-32
*Hn - Link Negotiation Speed .............................................................................................................. 3-32
-Kn - MNP Extended Services ............................................................................................................ 3-32
-Qn - Enable Fallback to V.22 bis/V.22......................................................................................... .......3-32
-SEC=n - Enable/Disable MNP10-EC.................................................................................................. 3-33
@Mn - Initial Cellular Power Level Setting........................................................................................... 3-33
:E - Compromise Equalizer Enable Command..................................................................................... 3-33
3.5 W-CLASS COMMANDS......................................................................................................................................3-34
3.5.1 AT* Commands ..................................................................................................................................... 3-34
*B - Display Blacklisted Numbers ........................................................................................................ 3-34
*D - Display Delayed Numbers............................................................................................................ 3-34
*NCn - Country Select ........................................................................................................................ 3-35
3.6 CALLER ID COMMANDS ...................................................................................................................................3-36
3.6.1 AT#CID Command ................................................................................................................................3-36
#CIDn - Caller ID ................................................................................................................................3-36
Inquiries .............................................................................................................................................3-36
Formatted Form Reporting..................................................................................................................3-36
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Example of Formatted Form Reporting ............................................................................................ ...3-37
Unformatted Form Reporting ..............................................................................................................3-37
Example of Unformatted Form Reporting .......................................................................................... ..3-37
3.7 CELLULAR COMMANDS....................................................................................................................................3-38
3.7.1 Cellular Phone Drivers ........................................................................................................................... 3-38
3.7.2 Cellular Commands ............................................................................................................................... 3-38
^C2 - Download Cellular Phone Driver ................................................................................................ 3-38
^I - Identify Cellular Phone Driver............................................................................................ ............3-38
^T6 - Indicate Status of Cellular Phone ............................................................................................... 3-39
3.7.3 Operation .............................................................................................................................................. 3-39
Modem Configuration ......................................................................................................................... 3-39
Fax Configuration ............................................................................................................................... 3-40
Cellular Phone Configuration .............................................................................................................. 3-40
3.8 AT COMMAND RESULT CODES ....................................................................................................................... 3-42
OK (0) 3-42
CONNECT (1) ....................................................................................................................................3-42
RING (2) ....................................................................................................................... ..................... 3-42
NO CARRIER (3)................................................................................................................................3-42
ERROR (4).........................................................................................................................................3-42
CONNECT 1200 (5)............................................................................................................................3-42
NO DIALTONE (6)..............................................................................................................................3-42
BUSY (7)............................................................................................................................................3-43
NO ANSWER (8) ................................................................................................................................3-43
CONNECT 0600 (9)............................................................................................................................3-43
CONNECT 2400 (10).......................................................................................................................... 3-43
CONNECT 4800 (11).......................................................................................................................... 3-43
CONNECT 9600 (12).......................................................................................................................... 3-43
CONNECT 7200 (13).......................................................................................................................... 3-43
CONNECT 12000 (14)........................................................................................................................ 3-43
CONNECT 14400 (15)........................................................................................................................ 3-43
CONNECT 19200 (16)........................................................................................................................ 3-43
CONNECT 38400 (17)........................................................................................................................ 3-44
CONNECT 57600 (18)........................................................................................................................ 3-44
CONNECT 115200 (19)...................................................................................................................... 3-44
CONNECT 75TX/1200RX (22)............................................................................................................ 3-44
CONNECT 1200TX/75RX (23)............................................................................................................ 3-44
DELAYED (24) ...................................................................................................................................3-44
BLACKLISTED (32) ............................................................................................................................3-44
FAX (33).............................................................................................................................................3-44
DATA (35) ..........................................................................................................................................3-44
CARRIER 300 (40) .............................................................................................................................3-44
CARRIER 1200/75 (44) ...................................................................................................................... 3-44
CARRIER 75/1200 (45) ...................................................................................................................... 3-44
CARRIER 1200 (46) ........................................................................................................................... 3-44
CARRIER 2400 (47) ........................................................................................................................... 3-44
CARRIER 4800 (48) ........................................................................................................................... 3-44
CARRIER 7200 (49) ........................................................................................................................... 3-45
CARRIER 9600 (50) ........................................................................................................................... 3-45
CARRIER 12000 (51) ......................................................................................................................... 3-45
CARRIER 14400 (52) ......................................................................................................................... 3-45
CARRIER 16800 (53) ......................................................................................................................... 3-45
CARRIER 19200 (54) ......................................................................................................................... 3-45
CARRIER 21600 (55) ......................................................................................................................... 3-45
CARRIER 24000 (56) ......................................................................................................................... 3-45
CARRIER 26400 (57) ......................................................................................................................... 3-45
CARRIER 28800 (58) ......................................................................................................................... 3-45
CONNECT 16800 (59)........................................................................................................................ 3-45
CONNECT 21600 (61)........................................................................................................................ 3-45
CONNECT 24000 (62)........................................................................................................................ 3-45
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AT Command Reference Manual
CONNECT 26400 (63)........................................................................................................................ 3-45
CONNECT 28800 (64)........................................................................................................................ 3-46
COMPRESSION: CLASS 5 (66) ......................................................................................................... 3-46
COMPRESSION: V.42 bis (67) ........................................................................................................... 3-46
COMPRESSION: NONE (69) ............................................................................................................. 3-46
PROTOCOL: NONE (70) ....................................................................................................................3-46
PROTOCOL: LAPM (77) ....................................................................................................................3-46
CARRIER 31200 (78) ......................................................................................................................... 3-46
CARRIER 33600 (79) ......................................................................................................................... 3-46
PROTOCOL: ALT (80)........................................................................................................................3-46
PROTOCOL: ALT-CELLULAR (81)..................................................................................................... 3-46
CONNECT 33600 (84)........................................................................................................................ 3-46
CONNECT 31200 (91)........................................................................................................................ 3-46
CARRIER 32000 (150) ....................................................................................................................... 3-46
CARRIER 34000 (151) ....................................................................................................................... 3-46
CARRIER 36000 (152) ....................................................................................................................... 3-47
CARRIER 38000 (153) ....................................................................................................................... 3-47
CARRIER 40000 (154) ....................................................................................................................... 3-47
CARRIER 42000 (155) ....................................................................................................................... 3-47
CARRIER 44000 (156) ....................................................................................................................... 3-47
CARRIER 46000 (157) ....................................................................................................................... 3-47
CARRIER 48000 (158) ....................................................................................................................... 3-47
CARRIER 50000 (159) ....................................................................................................................... 3-47
CARRIER 52000 (160) ....................................................................................................................... 3-47
CARRIER 54000 (161) ....................................................................................................................... 3-47
CARRIER 56000 (162) ....................................................................................................................... 3-47
CONNECT 32000 (165)...................................................................................................................... 3-47
CONNECT 34000 (166)...................................................................................................................... 3-47
CONNECT 36000 (167)...................................................................................................................... 3-47
CONNECT 38000 (168)...................................................................................................................... 3-48
CONNECT 40000 (169)...................................................................................................................... 3-48
CONNECT 42000 (170)...................................................................................................................... 3-48
CONNECT 44000 (171)...................................................................................................................... 3-48
CONNECT 46000 (172)...................................................................................................................... 3-48
CONNECT 48000 (173)...................................................................................................................... 3-48
CONNECT 50000 (174)...................................................................................................................... 3-48
CONNECT 52000 (175)...................................................................................................................... 3-48
CONNECT 54000 (176)...................................................................................................................... 3-48
CONNECT 56000 (177)...................................................................................................................... 3-48
CONNECT 230400 (20)...................................................................................................................... 3-48
+FCERROR (+F4) ..............................................................................................................................3-48
3.9 AUDIOSPAN AND DSVD COMMANDS .............................................................................................................. 3-49
3.9.1 Commands Supported by Both AudioSpan and DSVD ........................................................................... 3-49
-SMS= x, y, z, t - Select AudioSpan/DSVD Mode ................................................................................3- 49
#VLS = x - Voice Line Select............................................................................................................... 3-50
3.9.2 Commands Supported Only by DSVD.................................................................................................... 3-50
-SSE= x - Enable/Disable DSVD ......................................................................................................... 3-50
3.9.3 Commands Supported Only by AudioSpan ............................................................................................ 3-51
-SQS= x, y - Select AudioSpan Modulation ......................................................................................... 3-51
3.9.4 Examples ..............................................................................................................................................3-53
3.10 SYNCHRONOUS ACCESS MODE ................................................................................................................... 3-58
3.10.1 Synchronous Access Mode Commands ............................................................................................... 3-58
+ES - Enable Synchronous Access Mode ........................................................................................... 3-58
+ESA - Configure Synchronous Access Submode............................................................................... 3-59
+ ITF - Transmit Flow Control Thresholds ........................................................................................... 3-61
4. S-REGISTERS ..............................................................................................................................................................4-1
4.1 FACTORY DEFAULTS .........................................................................................................................................4-1
4.2 S-REGISTER DEFINITIONS.................................................................................................................................4-4
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S0 - Number of Rings to Auto-Answer ............................................................................................ ......4-4
S1 - Ring Counter.................................................................................................................................4-4
S2 - Escape Character .......................................................................................................... ...............4-4
S3 - Carriage Return Character ............................................................................................................4-4
S4 - Line Feed Character......................................................................................................................4-4
S5 - Backspace Character ....................................................................................................................4-4
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier (W-Class Models).............4-5
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier (US Models)4-5
S8 - Pause Time For Dial Delay ............................................................................................................4-5
S9 - Carrier Detect Response Time .............................................................................................. ........4-5
S10 - Lost Carrier To Hang Up Delay....................................................................................................4-5
S11 - DTMF Tone Duration...................................................................................................................4-5
S12 - Escape Prompt Delay (EPD) .......................................................................................................4-6
S13 - Reserved ....................................................................................................................................4-6
S14 - General Bit Mapped Options Status........................................................................................ .....4-6
S15 - Reserved ....................................................................................................................................4-6
S16 - General Bit Mapped Test Options Status .....................................................................................4-7
S17 - Reserved ....................................................................................................................................4-7
S18 - Test Timer...................................................................................................................................4-7
S19 - AutoSync Bit Mapped Options .............................................................................................. .......4-8
S20 - AutoSync HDLC Address or BSC Sync Character........................................................................4-8
S21 - V.24/General Bit Mapped Options Status.....................................................................................4-9
S22 - Speaker/Results Bit Mapped Options Status..............................................................................4-10
S23 - General Bit Mapped Options Status........................................................................................ ...4-11
S24 - Sleep Inactivity Timer ................................................................................................................ 4-11
S25 - Delay To DTR ........................................................................................................................... 4-11
S26 - RTS to CTS Delay..................................................................................................................... 4-11
S27 - Bit Mapped Options Status ........................................................................................................4-12
S28 - Bit Mapped Options Status ........................................................................................................4-13
S29 - Flash Dial Modifier Time ............................................................................................................ 4-13
S30 - Disconnect Inactivity Timer.............................................................................................. ..........4-13
S31 - Bit Mapped Options Status ........................................................................................................4-14
S32 - XON Character .........................................................................................................................4-14
S33 - XOFF Character........................................................................................................... .............4-14
S34-S35 - Reserved ........................................................................................................................... 4-14
S36 - LAPM Failure Control ................................................................................................................ 4-15
S37 - Desired Line Connection Speed................................................................................................. 4-16
S38 - Delay Before Forced Hang Up................................................................................................... 4-17
S39 - Flow Control Bit Mapped Options Status.................................................................................... 4-17
S40 - General Bit Mapped Options Status........................................................................................ ...4-18
S41 - General Bit Mapped Options Status........................................................................................ ...4-19
S46 - Data Compression Control ........................................................................................................ 4-19
S48 - V.42 Negotiation Action ............................................................................................................. 4-19
S82 - Break Handling Options............................................................................................................. 4-20
S86 - Call Failure Reason Code.......................................................................................................... 4-20
S91 - PSTN Transmit Attenuation Level.............................................................................................. 4-20
S92 - Fax Transmit Attenuation Level .................................................................................................4-20
S95 - Extended Result Codes ............................................................................................................. 4-21
5. FAX CLASS 1 COMMANDS .........................................................................................................................................5-1
5.1 FAX I/O PROCESSING ......................................................................................................... ...............................5-1
5.1.1 DTE-to-Modem Transmit Data Stream ........................................................................................ .............5-1
5.1.2 Modem-to-DTE Receive Data Stream ......................................................................................................5-1
5.1.3 Fax Mode Selection .................................................................................................................................5-1
5.1.4 Fax Origination ........................................................................................................................................5-1
5.1.5 Fax Answering.........................................................................................................................................5-2
5.1.6 Fax Control Transmission ........................................................................................................................5-2
5.1.7 Fax Control Reception .............................................................................................................................5-2
5.1.8 Fax Data Transmission ............................................................................................................................5-3
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5.1.9 Fax Data Reception .................................................................................................................................5-3
5.2 COMMANDS ........................................................................................................................................................5-4
+FCLASS=n - Select Service Class ......................................................................................................5-4
+F? - Report Active Configuration......................................................................................5-4
+F=? - Report Operating Capabilities.................................................................................5-4
+FAE=n - Data/Fax Auto Answer ..........................................................................................................5-4
+FTS=n - Stop Transmission and Wait..................................................................................................5-4
+FRS=n - Receive Silence ....................................................................................................................5-4
+FTM=n - Transmit Data ......................................................................................................... .............5-5
+FRM=n - Receive Data .......................................................................................................................5-5
+FTH=n - Transmit Data with HDLC Framing ........................................................................................5-6
+FRH=n - Receive Data with HDLC Framing.........................................................................................5-6
5.3 EXAMPLES ..........................................................................................................................................................5-6
6. FAX CLASS 2 COMMANDS .........................................................................................................................................6-1
6.1 COMMAND SYNTAX AND GUIDELINES..............................................................................................................6-1
6.1.1 DTE Commands ......................................................................................................................................6-1
DTE Command Lines ...........................................................................................................................6-1
Facsimile Command Syntax .................................................................................................................6-1
6.1.2 Serial Port Speed and Flow Control .........................................................................................................6-3
Data Stream Termination......................................................................................................................6-3
DTE to DCE Streams............................................................................................................................6-3
DCE to DTE Streams............................................................................................................................6-3
6.1.3 Auto Answer ............................................................................................................................................6-3
6.1.4 Identification of T.30 Options ........................................................................................... ........................6-3
6.1.5 Session Status Reporting.........................................................................................................................6-4
6.1.6 Procedure Interrupt Negotiation .......................................................................................... .....................6-4
6.2 SERVICE CLASS 2 IDENTIFICATION AND SELECTION......................................................................................6-4
6.2.1 +FMFR?, Request Manufacturer Identification .............................................................................. ...........6-4
6.2.2 +FMDL?, Identify Product Model........................................................................................... ...................6-4
6.2.3 +FREV?, Identify Product Revision ..........................................................................................................6-4
6.3 SERVICE CLASS 2 ACTION COMMANDS ...........................................................................................................6-4
6.3.1 ATD, Originate a Call ............................................................................................................................... 6-5
6.3.2 ATA, Answer a Call..................................................................................................................................6-5
Manual Call Answer..............................................................................................................................6-5
Automatic Answer.................................................................................................................................6-5
Connection as a Data Modem...............................................................................................................6-5
6.3.3 +FDT, Data Transmission ........................................................................................................................6-6
Initiate Page Transmission....................................................................................................................6-6
Continue a Page...................................................................................................................................6-6
Phase C Data Framing .........................................................................................................................6-6
Phase C Data Format ...........................................................................................................................6-6
, Escape from Transmission ......................................................................................................6-6
6.3.4 +FET, Transmit Page Punctuation ...........................................................................................................6-8
End a Page ..........................................................................................................................................6-8
6.3.5 +FDR, Begin or Continue Phase C Receive Data .....................................................................................6-9
Initiate Document Reception .................................................................................................................6-9
Continue Document Reception ........................................................................................................... 6-10
Phase C Data Framing ....................................................................................................................... 6-10
Phase C Data Format .........................................................................................................................6-10
, Escape from Reception ......................................................................................................... 6-10
6.3.6 +FK, Session Termination...................................................................................................................... 6-10
6.3.7 +FCIG, Set Polling ID ............................................................................................................................ 6-11
6.3.8 +FLPL, Indicate a Document for Polling ................................................................................................. 6-11
6.3.9 +FSPL, Enable Polling ........................................................................................................................... 6-11
6.4 SERVICE CLASS 2 DCE RESPONSES .............................................................................................................. 6-13
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6.4.1 +FCON, Facsimile Connection Response .............................................................................................. 6-13
6.4.2 +FDCS:, Report Current Session Capabilities ........................................................................................ 6-13
6.4.3 +FDIS:, Report Remote Station Capabilities........................................................................................... 6-13
6.4.4 +FCFR, Indicate Confirmation to Receive .............................................................................................. 6-13
6.4.5 +FTSI:, Report the Transmit Station ID ..................................................................................................6-13
6.4.6 +FCSI:, Report the Called Station ID......................................................................................................6-13
6.4.7 +FPTS:, Receive Page Transfer Status..................................................................................................6-14
6.4.8 +FET:, Post Page Message Response................................................................................................... 6-14
6.4.9 +FPTS:, Transmit Page Transfer Status.................................................................................................6-14
6.4.10 +FHNG:, Call Termination with Status .................................................................................................. 6-14
6.4.11 +FCIG:, Report the Polled Station ID ...................................................................................................6-15
6.4.12 +FDTC:, Report the Polled Station Capabilities .................................................................................... 6-15
6.4.13 +FPOLL, Indicate Polling Request........................................................................................................ 6-15
6.5 SERVICE CLASS 2 PARAMETERS .................................................................................................................... 6-16
6.5.1 +FDCC, DCE Capabilities Parameters ................................................................................................... 6-16
6.5.2 +FDIS, Current Sessions Capabilities Parameters.................................................................................. 6-16
6.5.3 +FDCS, Current Session Results Parameters ........................................................................................ 6-17
6.5.4 +FLID=, Local ID String ......................................................................................................................... 6-18
6.5.5 +FCR, Capability to Receive .................................................................................................................. 6-18
6.5.6 +FPTS=, Page Transfer Status ............................................................................................. .................6-18
6.5.7 +FCQ, Copy Quality Checking ............................................................................................................... 6-18
6.5.8 +FPHCTO, DTE Phase C Response Time-out ....................................................................................... 6-18
6.5.9 +FAXERR, T.30 Session Error Report ................................................................................................... 6-19
6.5.10 +FBOR, Data Bit Order........................................................................................................................ 6-19
6.5.11 +FAA, Answer Parameter ....................................................................................................................6-19
6.5.12 +FBUF?, Buffer Size............................................................................................................................6-20
6.6 EXAMPLE SESSIONS........................................................................................................................................6-20
7. VOICE/AUDIO COMMANDS .........................................................................................................................................7-1
7.1 VOICE/AUDIO SUBMODES .................................................................................................................................7-1
7.1.1 Online Voice Command Mode .................................................................................................................7-1
7.1.2 Voice Receive Mode ................................................................................................................................7-1
7.1.3 Voice Transmit Mode...............................................................................................................................7-2
7.2 VOICE/AUDIO CAPABILITIES ..............................................................................................................................7-2
7.2.1 Call Establishment - Originate..................................................................................................................7-2
Directed Originate (Dial as a specific modem type) ...............................................................................7-2
Adaptive Originate (Dial with Voice/Data/Fax Discrimination).................................................................7-2
7.2.2 Call Establishment - Answer ....................................................................................................................7-3
Directed Answer (Answer as a specific modem type) ............................................................................7-3
Adaptive Answer (Answer with Voice/Data/Fax Discrimination)..............................................................7-3
7.2.3 Voice/Audio Data Transfer .......................................................................................................................7-4
7.2.4 Tone and Status Monitoring Shielded Statuses............................................................................7-4
7.2.5 Shielded Commands from the DTE ..............................................................................................7-6
7.2.6 Voice Record...........................................................................................................................................7-8
7.2.7 Voice Playback ........................................................................................................................................7-8
Volume Adjustment During Record .......................................................................................................7-8
Volume Adjustment During Playback ....................................................................................................7-8
7.2.8 Voice Call Termination.............................................................................................................................7-9
Local Disconnect ..................................................................................................................................7-9
Remote Disconnect Detection...............................................................................................................7-9
7.2.9 Mode Switching .......................................................................................................................................7-9
Voice to Fax .........................................................................................................................................7-9
Unsuccessful Fax Connection Attempt to Voice ....................................................................................7-9
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Voice to Data........................................................................................................................................7-9
Unsuccessful Data Connection Attempt to Voice...................................................................................7-9
7.2.10 Caller ID ................................................................................................................................................7-9
7.3 AT VOICE COMMAND SUMMARY..................................................................................................................... 7-10
7.3.1 Global AT Command Set Extensions ..................................................................................................... 7-10
ATA - Answering in Voice/Audio.......................................................................................................... 7-11
ATD - Dial Command in Voice/Audio................................................................................................... 7-11
ATH - Hang Up in Voice/Audio ............................................................................................................ 7-11
ATZ - Reset from Voice Mode.............................................................................................................7-12
#BDR - Select Baud Rate (Turn off Autobaud) .................................................................................... 7-12
#CID - Enable Caller ID Detection and Select Reporting Format......................................................... 7-12
#CLS - Select Data, Fax, or Voice/Audio............................................................................................. 7-14
#MDL? - Identify Model......................................................................................................... ..............7-14
#MFR? - Identify Manufacturer ...........................................................................................................7-14
#REV? - Identify Revision Level .......................................................................................................... 7-14
7.3.2 AT#V Commands Enabled Only in Voice Mode (#CLS=8) ...................................................................... 7-15
#TL- Audio Output Transmit Level ............................................................................................... .......7-15
#VBQ? - Query Buffer Size...................................................................................................... ...........7-15
#VBS - Bits Per Sample...................................................................................................................... 7-15
#VBT - Beep Tone Timer .................................................................................................................... 7-16
#VCI? - Identify Compression Method............................................................................................ .....7-16
#VLS - Voice Line Select .................................................................................................................... 7-17
#VRA - Ringback Goes Away Timer (Originate) .................................................................................. 7-19
#VRN - Ringback Never Came Timer (Originate) ................................................................................ 7-19
#VRX - Voice Receive ........................................................................................................................ 7-19
#VSD - Enable Silence Deletion (Voice Receive) [ADPCM] ................................................................. 7-20
#VSK - Buffer Skid Setting.................................................................................................................. 7-20
#VSP - Silence Detection Period (Voice Receive) [ADPCM] ................................................................ 7-21
#VSR - Sampling Rate Selection......................................................................................................... 7-21
#VSS - Silence Detection Tuner (Voice Receive) [ADPCM] ................................................................. 7-22
#VTD - DTMF Tone Reporting ............................................................................................................ 7-23
#VTM - Enable Timing Mark Placement .............................................................................................. 7-24
#VTS - Generate Tone Signals (Online Voice Command) ................................................................... 7-24
#VTX - Voice Transmit........................................................................................................................ 7-25
#VGT - Set Playback Volume in the Command State .......................................................................... 7-25
and - Set Playback Volume in the Data State................................................... 7-25
7.3.3 Speakerphone Commands .................................................................................................................... 7-25
Originating a Call in Speakerphone Mode ........................................................................................... 7-26
Answering a Call in Speakerphone Mode ............................................................................................ 7-26
Muting the Local Handset During Phone Conversation - Music on Hold............................................... 7-26
Recording a Handset Conversation on the Phone Line........................................................................ 7-27
Recording/Playback from Handset through Sound Chip ...................................................................... 7-27
#SPK Parameter ................................................................................................................................7-27
Room Monitor.....................................................................................................................................7-29
Switching Between #VLS Settings....................................................................................................... 7-29
Reporting of Local Handset Status...................................................................................................... 7-29
7.3.4 Using VoiceView with Speakerphone, Headset, and Handset modes...................................................... 7-30
Using Modem as Dialer Prior to VoiceView Mode................................................................................ 7-31
7.4 S-REGISTERS ...................................................................................................................................................7-32
S30 - Disconnect Inactivity Timer.............................................................................................. ..........7-32
7.5 RESULT CODES FOR VOICE OPERATION....................................................................................................... 7-32
7.6 EXAMPLES OF VOICE OPERATION ................................................................................................................. 7-32
8. AT COMMAND SET SUMMARY ...................................................................................................................................8-1
8.1 BASIC AT COMMANDS........................................................................................................................................8-1
8.2 ECC COMMANDS ................................................................................................................................................8-4
8.3 MNP 10 COMMANDS...........................................................................................................................................8-5
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8.4 W-CLASS COMMANDS........................................................................................................................................8-5
8.5 CALLER ID COMMANDS .....................................................................................................................................8-5
8.6 FAX CLASS 1 .......................................................................................................................................................8-5
8.7 FAX CLASS 2 .......................................................................................................................................................8-6
8.8 VOICE/AUDIO COMMANDS.................................................................................................................................8-7
8.9 CELLULAR COMMANDS......................................................................................................................................8-7
8.10 AUDIOSPAN AND DSVD COMMANDS ..............................................................................................................8-7
8.11 SYNCHRONOUS ACCESS MODE COMMANDS ................................................................................................8-7
9. COMMON CONFIGURATION SETUP STRINGS ..........................................................................................................9-1
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List of Tables
Table 3-1. Result Codes ..................................................................................................................................................3-11
Table 3-2. Remote Modem Configuration and Resulting Transmit Levels ......................................................................... 3-41
Table 4-1. S-Register Summary.........................................................................................................................................4-2
Table 5-1. Fax Class 1 Commands ....................................................................................................................................5-1
Table 5-2. Fax Class 1 Calling Sequence (One Page)........................................................................................................5-7
Table 5-3. Fax Class 1 Answering Sequence (One Page) ..................................................................................................5-8
Table 6-1. Fax Class 2 Commands ....................................................................................................................................6-2
Table 6-2. T.30 Session Subparameter Codes...................................................................................................................6-7
Table 6-3. T.30 Post Page Message Codes .......................................................................................................................6-8
Table 6-4. T.30 Post Page Response Messages................................................................................................................6-8
Table 6-5. Hang Up Status Codes ...................................................................................................................................6-12
Table 6-6. Send Two Pages, 1-D, No Errors .................................................................................................................... 6-21
Table 6-7. Receive Two Pages, 1-D Data, No Errors........................................................................................................ 6-22
Table 7-1. DTE Speeds .....................................................................................................................................................7-4
Table 7-2. Codes Sent to the DTE ............................................................................................... ......................................7-5
Table 7-3. Shielded DTE Codes.........................................................................................................................................7-7
Table 7-4. AT Voice Commands ......................................................................................................................................7-10
Table 7-5. Device Types Supported by #VLS ................................................................................................................... 7-18
Table 7-6. #VTD Tone Detection/Reporting Bit Settings ................................................................................................... 7-23
Table 7-7. Record a Greeting Message ........................................................................................... ................................ 7-33
Table 7-8. Playback a Greeting Message......................................................................................................................... 7-35
Table 7-9. Answer Call/Play Greeting/Record Message ................................................................................................... 7-36
Table 7-10. Call/Record Message/Receive Fax................................................................................................................ 7-38
Table 7-11. Answer Call, Determine It's a Fax.................................................................................................................. 7-40
Table 7-12. Adaptive Fax/Data/Voice; Determine Data..................................................................................................... 7-41
Table 7-13. Originate a Call, Send Answerer a Message.................................................................................................. 7-42
List of Figures
Figure 6-1. T.30 Session Parameter Relationships........................................................................................................... 6-16
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1. INTRODUCTION
1.1 OVERVIEW
This manual describes the AT commands for the following Rockwell modem families:
RC56ACi
RCV56ACFL/SP
RCV56ACF/SP
RCV56ACF/SVD
RC336ACi
RC336ACL
RC336ACFL/SP
RCV336ACi/SP
RCV336ACF/SP
RCV336ACF/SVD
RC288ACi
RC288ACL
RC288ACLW-GSM
RCV288ACi/SP
RC144ACi and RC144ATi
RC144ACL and RC144ATL
RC144ACG
RC144ACF/ATF
RC144ACFL/ATFL
RCV144ACi/SP
RCV144ACF/SP
The descriptions apply to all these modems with any differences between modem product families noted. Refer to Modem
Firmware Release notes for commands applicable to modem firmware.
ATi, ATL, ATF, and ATFL models support error correction and data compression (ECC) performed by the host CPU and
communications software for Windows using the enhanced Rockwell Windows Protocol Interface (RPI or RPI+™) and
WinRPI host software module.
1.1.1 Command Syntax
The fundamental DTE interface command syntax is described in Section 2.
1.1.2 Command Descriptions
These commands are grouped into the following categories:
AT commands
S-Registers
Fax Class 1 commands
Fax Class 2 commands
Voice/Audio commands
AT Command Summary
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
The AT commands are implemented in microcontroller (MCU) firmware for specific modem models. The support for a
command category is identified by modem model in the modem designer's guide. Additional configuration and
implementation information is available in release notes and/or readme files that accompany MCU firmware release.
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1.1.3 Call Progress and Blacklisting Parameters
The modem MCU firmware may be provided either in reconfigurable form or preconfigured form. Consult the specific
firmware release notes for exact configuration information.
Reconfigurable Form. The modem MCU firmware can be configured for operation in specific countries by the PCcompatible ConfigurACE II program. The call progress and blacklisting parameters described in the ConfigurACE II User's
Manual can be altered and loaded for a number of countries by this program.
Preconfigured Form. Specific MCU firmware configurations may be released that can be directly installed without requiring
the use of ConfigurACE II.
1.1.4 ConfigurACE II for Windows Utility Program
The PC-based ConfigurACE II for Windows utility program allows the OEM to customize the modem firmware to suit specific
application and country requirements. ConfigurACE II for Windows allows programming of functions such as:
Loading of multiple sets of country parameters
Loading of NVRAM factory profiles
Call progress and blacklisting parameters
Entry of S register maximum/minimum values
Limitation of transmit levels
Modification of factory default values
Customization of the ATI4 response
Customization of fax OEM messages
This program modifies the hex object code which can be programmed directly into the system EPROM. Lists of the
generated parameters can be displayed or printed.
Rockwell-provided country parameter files allow a complete set of country-specific call progress and blacklisting parameters
to be selected.
Refer to the ConfigurACE II for Windows software for a detailed description of capabilities and the operating procedure.
1.2 REFERENCE DOCUMENTATION
RC144ACF and RC144ATF Modem Designer's Guide (Order No. 1055)
RC144ACF/ASVD and RCV288ACF/ASVD Modem Designer’s Guide (Order No. 1082)
RC144ACF/SP and RC144ATF Modem Designer's Guide (Order No. 1046)
RC144ACG Modem Designer's Guide (Order No. 1108)
RC144ACi and RC144ACL Modem Designer's Guide (Order No. 876)
RC144ATi and RC144ATL Modem Designer's Guide (Order No. 897)
RC288ACi and RC288ACL Modem Designer's Guide (Order No. 1027)
RC288ACL/SVD SP Modem Designer’s Guide (Order No. 1096)
RCV336ACL Modem Designer’s Guide (Order No. 1121)
RCV56ACF/SP, RCV336ACF/SP, and RC288ACF/SP Modem Designer’s Guide (Order No. 1046)
RCV56ACF/SVD and RCV336ACF/SVD Modem Designer’s Guide (Order No. 1105)
RCV336ACFL/SVD Modem Designer’s Guide (Order No. 1062)
RCV56ACFL/SVD and RCV336ACFL/SVD Modem Designer’s Guide (Order No. 1121)
RCV56ACi and RCV336ACi Modem Designer’s Guide (Order No. 1117)
1-2
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2. COMMAND SYNTAX
2.1 DTE/DCE INTERCHANGE CIRCUITS
Communication between the DTE and modem is half duplex (i.e., only one entity 'talks' at a time).
2.2 COMMAND SYNTAX AND GUIDELINES
2.2.1 DTE Commands
The ISO 646 character set (CCITT T.50 International Alphabet 5, American Standard Code for Information Interchange) is
used for the issuance of commands and responses. Only the low-order 7 bits of each character are used for commands or
parameters; the high-order bit is ignored. Upper case characters are equivalent to lower case characters.
2.2.2 DTE Command Lines
A command line is a string of characters sent from a DTE to the DCE while the DCE is in a command state. Command lines
have a prefix, a body, and a terminator. The prefix consists of the ASCII characters “AT” (065, 084) or “at” (097, 116). The
body is a string of commands restricted to printable ASCII characters (032 - 126). Space characters (ASCII 032) and control
characters other than carriage return (default value = ASCII 013 = 0Dh, see register S3), backspace (default
value = ASCII 008 = 08h, see register S5), and cancel (ASCII 024 = 18h) in the command string are ignored. The
default terminator is the character. Characters that precede the AT prefix are ignored.
2.3 AT COMMAND GUIDELINES
Modem operation is controlled by generic AT commands. These AT commands may be basic AT (i.e., commands preceded
by AT, AT&, AT%, AT*, AT\, AT), AT-, or AT#), S-Register (e.g., S6=n), Fax class 1 (e.g., +FTM), Fax class 2 (e.g.,
+FDCS:), or voice (e.g., #VBS) commands. The command syntax and operation guidelines governing each of these
command categories are described in subsequent sections.
2.3.1 Basic Command Syntax
Characters within the command line are parsed as commands with associated parameter values. The basic commands
consist of single ASCII characters, or single characters preceded by a prefix character, followed by a decimal parameter
(e.g., “&D1"). Missing decimal parameters are evaluated as 0.
2.3.2 Extended Command Syntax
The facsimile commands use extended syntax. They are preceded by the “+F” characters, and they are terminated by the
semicolon “:” character (ASCII 059) or by the that terminates the command line.
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3. AT COMMAND SET
3.1 AT COMMAND GUIDELINES
The basic AT commands used to control modem operation are defined in this section. These commands are summarized in
Appendix A. All these commands may not be available in a specific product depending upon supported data rates and
modes. The default values are typical of a fully configured modem supporting all data rates and options. The actual default
value is dependent upon modem firmware as defined by the firmware release notes.
3.1.1 AT Commands, DTE Adaption
Under AT operation, the serial interfaced modem performs an autobaud/autoparity/autolength function on each AT header
entered. The autolength/autoparity facility can detect 7- or 8-bit characters of even, odd, or no parity with one stop bit. This is
not necessary for the parallel interfaced modem since it has direct access to the UART registers.
3.1.2 AT Command Format
A command line is a string of characters sent from a DTE to the modem (DCE) while the modem is in a command state. A
command line has a prefix, a body, and a terminator. Each command line (with the exception of the A/ command) must
begin with the character sequence AT and must be terminated by a carriage return. Commands entered in upper case or
lower case are accepted, but both the A and T must be of the same case, i.e., "AT" = ASCII 065, 084 or “at” = ASCII 097,
116. The body is a string of commands restricted to printable ASCII characters (032 - 126). Space characters (ASCII 032)
and control characters other than CR (ASCII 013) and BS (ASCII 010) in the command string are ignored. The default
terminator is the ASCII character. Characters that precede the AT prefix are ignored. The command line interpretation
begins upon receipt of the carriage return character.
Characters within the command line are parsed as commands with associated parameter values. The basic commands
consist of single ASCII characters, or single characters preceded by a prefix character (e.g., “&"), followed by a decimal
parameter. Missing decimal parameters are evaluated as 0.
The modem supports the editing of command lines by recognizing a backspace character. When modem echo is enabled,
the modem responds to receipt of a backspace or delete by echoing a backspace character, a space character, and another
backspace. The hex value to be used for the backspace character is programmable through register S5. Values equal to 0
or greater than 127, or the value which corresponds to the carriage return character, cannot be used for the backspace
character. This editing is not applicable to the AT header of a command. A command line may be aborted at any time by
entering < cntrl-x > (18h).
The AT sequence may be followed by any number of commands in sequence, except for commands such as Z, D, or A.
Commands following commands Z, D, or A on the same command line will be ignored. The maximum number of characters
on any command line is 39 (including "A" and "T"). If a syntax error is found anywhere in a command line command, the
remainder of the line will be ignored and the ERROR result code will be returned.
Most commands entered with parameters out of range will not be accepted and the ERROR response will be returned to the
DTE.
Commands will only be accepted by the modem once the previous command has been fully executed, which is normally
indicated by the return of an appropriate result code. Execution of commands D and A, either as a result of a direct
command or a re-execute command, will be aborted if another character is entered before completion of the handshake.
3.1.3 Escape Code Sequence
When the modem has established a connection and has entered on-line data mode, it is possible to break into the data
transmission in order to issue further commands to the modem in an on-line command mode. This is achieved by the DTE
sending to the modem a sequence of three ASCII characters specified by register S2. The default character is '+'. The
maximum time allowed between receipt of the last character of the three escape character sequence from the DTE and
sending of the OK result code to the DTE is controlled by the S12 register.
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3.2 AT COMMAND SET
The modem will respond to the commands detailed below. Parameters applicable to each command are listed with the
command description. The defaults shown for each configuration command are those used in the Rockwell factory profile 0.
3.2.1 AT Commands
A/ - Re-execute Command
The modem behaves as though the last command line had been re-sent by the DTE. "A/" will repeat all the commands in the
command buffer.
The principal application of this command is to place another call (using the Dial command) that failed to connect due to a
busy line, no answer, or a wrong number. This command must appear alone on a command line. This command should not
be terminated by a carriage return.
AT= x - Write to Selected S-Register
This command writes the value x to the currently selected S-Register. An S-Register can be selected by using the ATSn
command. All of the S-Registers will return the OK response if x is a number. Some registers may not be written due to
country specific PTT limitations.
Result Codes
OK
For all arguments.
AT? - Read Selected S-Register
This command reads and displays the selected S-Register. An S-Register can be selected by using the ATSn command.
Result Codes:
OK
For all arguments.
A - Answer
The modem will go off-hook and attempt to answer an incoming call if correct conditions are met. Upon successful
completion of answer handshake, the modem will go on-line in answer mode. This command may be affected by the state of
Line Current Sense, if enabled. (Most countries do not require Line Current Sense.) Operation is also dependent upon
+FCLASS command and country-specific requirements.
If +FCLASS=0 is selected, the modem will enter the connect state after exchanging carrier with the remote modem. If no
carrier is detected within a period specified in register S7, the modem hangs up. Any character entered during the connect
sequence will abort the connection attempt.
If +FCLASS=1 or 2 is selected, the modem will go off-hook in V.21 answer mode. It will generate the V.21 2100 Hz answer
tone for 3 ± 0.5 seconds and, following a delay of 70 ms, will proceed as if the +FTH=3 command were issued. At any stage
up to (but excluding) the +FTH=3 command state, any character will abort the communication. (See the description of the
+FTH command for details.)
Bn - CCITT or Bell
When the modem is configured to allow either option, the modem will select Bell or CCITT modulation for a line speed
connection of 300 or 1200 bps according to the parameter supplied. Any other line speed will use a CCITT modulation
standard. The parameter value, if valid, is written to S27 bit 6. (Also, see ATFn command.)
B0
Selects CCITT operation at 300 or 1200 bps during Call Establishment and a subsequent
connection. (Default for W-class models.)
B1
Selects BELL operation at 300 or 1200 bps during Call Establishment and a subsequent
connection. (Default for US models.)
Result Codes:
3-2
OK
n = 0 or 1.
ERROR
Otherwise.
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Cn - Carrier Control
This command is included for compatibility only, and has no effect other than returning a result code. The only valid
parameter is 1.
Result Codes:
OK
n = 1.
ERROR
Otherwise.
Dn - Dial
This command directs the modem to go on-line, dial according to the string entered and attempt to establish a connection. If
no dial string is supplied, the modem will go on-line and attempt the handshake in originate mode. In W-class models, the
action of going off-hook is affected by the status of the Line Current Sense input, if line current sensing is enabled, and by
the blacklist and delayed list. NOTE: If the ATD command is issued before the S1 register has cleared, the modem will
respond with the NO CARRIER result code.
If +FCLASS=0 is selected, the modem will behave as a data modem and will attempt to connect to another data modem.
The modem will have up to the period of time specified by register S6 or S7 to wait for carrier and complete the handshake.
If this time expires before the modem can complete the handshake, the modem will go on-hook with the NO CARRIER
response. This command will be aborted in progress upon receipt of any DTE character before completion of the handshake.
If +FCLASS=1 or 2 is selected, the modem will behave as a facsimile modem and attempt to connect to a facsimile machine
(or modem) by entering the HDLC V.21 channel 2 receive state (as if +FRH=3 had been issued). This command will be
aborted upon receipt of any DTE character if the modem has not finished dialing. In this case, the modem will go on-hook
and return to command mode after displaying the NO CARRIER message. If the modem has finished dialing, it proceeds as
if the +FRH=3 command has been issued. (Refer to the +FRH command to determine how the modem behaves following
this stage.)
Dial Modifiers. The valid dial string parameters are described below. Punctuation characters may be used for clarity, with
parentheses, hyphen, and spaces being ignored.
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0-9
DTMF digits 0 to 9.
The 'star' digit (tone dialing only).
The 'gate' digit (tone dialing only).
A-D
DTMF digits A, B, C, and D. Some countries may prohibit sending of these digits during dialing.
Re-dial last number: the modem will re-dial the last valid telephone number. The L must be
immediately after the D with all the following characters ignored).
Select pulse dialing: pulse dial the numbers that follow until a "T" is encountered. Affects current and
subsequent dialing. Some countries prevent changing dialing modes after the first digit is dialed.
Select tone dialing: tone dial the numbers that follow until a "P" is encountered. Affects current and
subsequent dialing. Some countries prevent changing dialing modes after the first digit is dialed.
This command will be accepted, but not acted on.
S=n
Dial the number stored in the directory (n = 0 to 3). (See &Z.)
Flash: the modem will go on-hook for a time defined by the value of S29. Country requirements may
limit the time imposed.
Wait for dial tone: the modem will wait for dial tone before dialing the digits following "W". If dial tone
is not detected within the time specified by S7 (US) or S6 (W-class), the modem will abort the rest
of the sequence, return on-hook, and generate an error message.
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AT Command Reference Manual
Wait for silence: the modem will wait for at least 5 seconds of silence in the call progress frequency
band before continuing with the next dial string parameter. If the modem does not detect these 5
seconds of silence before the expiration of the call abort timer (S7), the modem will terminate the
call attempt with a NO ANSWER message. If busy detection is enabled, the modem may terminate
the call with the BUSY result code. If answer tone arrives during execution of this parameter, the
modem handshakes.
Wait for credit card dialing tone before continuing with the dial string. If the tone is not detected
within the time specified by S7 (US models) or S6 (W-class models), the modem will abort the rest
of the sequence, return on-hook, and generate an error message.
Dial pause: the modem will pause for a time specified by S8 before dialing the digits following ",".
Return to command state. Added to the end of a dial string, this causes the modem to return to the
command state after it processes the portion of the dial string preceding the ";". This allows the user
to issue additional AT commands while remaining off-hook. The additional AT commands may be
placed in the original command line following the ";" and/or may be entered on subsequent
command lines. The modem will enter call progress only after an additional dial command is issued
without the ";" terminator. Use "H" to abort the dial in progress, and go back on-hook.
Toggles calling tone enable/disable: applicable to current dial attempt only.
()
Ignored: may be used to format the dial string.
Ignored: may be used to format the dial string.
Ignored: may be used to format the dial string.
Invalid character: will be ignored.
If enabled by country specific parameter, the modem will generate a grounding pulse on the EARTH
relay output.
En - Command Echo
The modem enables or disables the echo of characters to the DTE according to the parameter supplied. The parameter
value, if valid, is written to S14 bit 1.
E0
Disables command echo.
E1
Enables command echo. (Default.)
Result Codes:
3-4
OK
n = 0 or 1.
ERROR
Otherwise.
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Fn - Select Line Modulation (RC144 Models Only)
This command selects the line modulation according to the parameter supplied. The line modulation is fixed unless
Automode is selected. This command interacts with the S37 and the N command. The parameter value, if valid, is written to
S37 bits 0-4. To select line modulation, it is recommended that either the F command, or a combination of the S37 and the N
command, be used, but not both.
F0
Selects auto-detect mode. Sets N1 and sets S31 bit 1. In this mode, the modem configures for
automode operation. All connect speeds supported by the modem are possible according to the
remote modem's preference. The contents of S37 are ignored as is the sensed DTE speed.
F1
Selects V.21 or Bell 103 according to the B setting as the only acceptable line speed resulting in a
subsequent connection. Sets N0, sets S37 to 1, and clears S31 bit 1. This command is equivalent
to the command string: ATN0S37=1.
F2
Not supported.
F3
Selects V.23 as the only acceptable line modulation for a subsequent connection. Originator is at
75 bps and answerer is at 1200 bps. Sets N0, sets S37 to 7, and clears S31 bit 1. This command
is equivalent to the command string: ATN0S37=7.
F4
Selects V.22 1200 or Bell 212A according to the B command setting as the only acceptable line
speed for a subsequent connection. Sets N0, sets S37 to 5, and clears S31 bit 1. This command
is equivalent to the command string: ATN0S37=5.
F5
Selects V.22 bis as the only acceptable line modulation for a subsequent connection. Sets N0,
sets S37 to 6, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=6.
F6
Select V.32 bis 4800 or V.32 4800 as the only acceptable line modulation for a subsequent
connection. Sets N0, sets S37 to 8, and clears S31 bit 1. This command is equivalent to the
command string: ATN0S37=8.
F7
Selects V.32 bis 7200 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 12, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=12.
This setting also allows connection at the Rockwell proprietary 7200 V.32 speed, e.g., with a
RC9696/12 based modem.
F8
Selects V.32 bis 9600 or V.32 9600 as the only acceptable line modulations for a subsequent
connection. Sets N0, sets S37 to 9, and clears S31 bit 1. This command is equivalent to the
command string: ATN0S37=9.
F9
Selects V.32 bis 12000 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 10, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=10.
This setting also allows connection at the Rockwell proprietary 12000 V.32 speed, e.g., with a
RC9696/12 based modem.
F10
1048
Selects V.32 bis 14400 as the only acceptable line modulation for a subsequent connection. Sets
N0, sets S37 to 11, and clears S31 bit 1. This command is equivalent to the command string:
ATN0S37=11.
3-5
AT Command Reference Manual
Hn - Disconnect (Hang-Up)
This command initiates a hang up sequence.
This command may not be available for some countries due to PTT restrictions.
H0
The modem will release the line if the modem is currently on-line, and will terminate any test
(AT&T) that is in progress. Country specific, modulation specific, and error correction protocol
specific (S38) processing is handled outside of the H0 command.
H1
If on-hook, the modem will go off-hook and enter command mode. For US models, the modem
will remain off-hook. For W-class models, the modem will return on-hook after a period of time
determined by S7.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
In - Identification
The modem reports to the DTE the requested result according to the command parameter.
I0
Reports product code. Example: 28800
I1
Calculates the ROM checksum and reports the least significant byte of the checksum in decimal
(see firmware release notes). Reports 255 if the prestored checksum value is FFh.
I2
Calculates the ROM checksum and compares it with the prestored checksum. Reports "OK" if the
calculated checksum equals the prestored checksum or if the prestored checksum value is FFh;
otherwise reports “ERROR”.
I3
Reports the firmware version (F), basic model (e.g.,V34), application code (A), and interface type
code (I) typically in the form VF.FFF-V34_AI. The application codes are: D = Desktop, L = Low
Power (PCMCIA). The interface type codes are: S = Serial, P = Parallel. Example: V1.400V34_DS
Note: If RPI+ is supported, “ROCKWELL RPI (TM)” is appended.
I4
Reports OEM defined identifier string in either Hayes-compatible binary format (default) or ASCII
format (selectable by ConfigurACE). Example: RC288ACi (ASCII)
I5
Reports Country Code parameter. Example: 022
I6
Reports modem data pump model and internal code revision. Example: RC288DPi Rev 05BA
I7
Reports the DAA code resulting from MCU interrogation of the DAA for auto DAA recognition.
Examples: 000 for US or Canada, 016 for Japan, 033 for Belgium, 034 for Finland, 035 for
France, 037 for Italy, 038 for Netherlands, 039 for Sweden, 040 for Switzerland, and 041 for UK.
Result Codes:
OK
n = 0 to 7.
ERROR
Otherwise.
Ln - Speaker Volume
The modem sets the speaker volume control according to the parameter supplied. The parameter value, if valid, is written to
S22 bits 0 and 1.
L0
Low volume.
L1
Low volume. (Default.)
L2
Medium volume.
L3
High volume.
Result Codes:
3-6
OK
n = 0 to 3.
ERROR
Otherwise.
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AT Command Reference Manual
Mn - Speaker Control
This command selects when the speaker will be on or off. The parameter value, if valid, is written to S22 bits 2 and 3.
M0
Speaker is always off.
M1
Speaker is on during call establishment, but off when receiving carrier. (Default.)
M2
Speaker is always on.
M3
Speaker is off when receiving carrier and during dialing, but on during answering.
Result Codes:
OK
n = 0 to 3.
ERROR
Otherwise.
Nn - Automode Enable
This command enables or disables automode detection. The parameter value, if valid, is written to S31 bit 1.
N0
Automode detection is disabled (equivalent to setting the +MS subparameter to 0). A
subsequent handshake will be conducted according to the contents of S37 or, if S37 is zero,
according to the most recently sensed DTE speed.
N1
Automode detection is enabled (equivalent to setting the +MS subparameter to 1). A
subsequent handshake will be conducted according the automode algorithm supported by the
modem, e.g., according to the contents of S37 or, if S37 is zero, starting at 28800 bps V.34
(RC288). This command is also equivalent to F0 (RC144). (Default.)
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
Notes:
1.
The Nn and S37=x commands override the +MS command settings. When the N0 or N1 command is issued, the +MS
subparameters are updated to reflect the Nn and S37 values (see +MS command and S37 register). For example:
N1S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000
N0S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
2.
Use of the +MS command is recommended instead of the Nn and S37=x commands. Nn and S37=x commands are
supported for compatibility with existing communication software.
On - Return to On-Line Data Mode
This command determines how the modem will enter the on-line data mode. If the modem is in the on-line command mode,
the enters the on-line data mode with or without a retrain. If the modem is in the off-line command mode (no connection),
ERROR is reported.
O0
Enters on-line data mode without a retrain. Handling is determined by the Call Establishment task.
Generally, if a connection exists, this command connects the DTE back to the remote modem
after an escape (+++).
O1
Enters on-line data mode with a retrain before returning to on-line data mode.
Result Codes:
1048
OK
n = 0 or 1 and a connection exists.
ERROR
Otherwise or if not connected.
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AT Command Reference Manual
P - Set Pulse Dial Default
This command forces pulse dialing until the next T dial modifier or T command is received. Sets S14 bit 5.
As soon as a dial command is executed which explicitly specifies the dialing mode for that particular call (e.g., ATDT...), this
command is overridden so that all future dialing will be tone dialed. (See T command.)
This command may not be permitted in some countries.
Result Code:
OK
Qn - Quiet Results Codes Control
The command enables or disables the sending of result codes to the DTE according to the parameter supplied. The
parameter value, if valid, is written to S14 bit 2.
Q0
Enables result codes to the DTE. (Default.)
Q1
Disables result codes to the DTE.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
Sn - Read/Write S-Register
The modem selects an S-Register, performs an S-Register read or write function, or reports the value of an S-Register.
Establishes S-Register n as the last register accessed.
n=v
Sets S-Register n to the value v.
n?
Reports the value of S-Register n.
The parameter n can be omitted, in which case the last S-Register accessed will be assumed. The S can be omitted for AT=
and AT?, in which case the last S-Register accessed will be assumed.
For example:
ATS7 establishes S7 as the last accessed register.
AT=40 sets the contents of the last register accessed to 40.
ATS=20 sets the contents of the last register accessed to 20.
If the number "n" is beyond the range of the S-Registers available, the modem will return the ERROR message. The value
"v" is "MOD"ed with 256. If the result is outside the range permitted for a given S-Register the values will still be stored, but
functionally the lower and higher limits will be observed. Input and output are always in decimal format. Note that some SRegisters are read-only.
In some cases, writing to the S-Register will appear to be accepted but the value will not actually be written.
Due to country restrictions, some commands will be accepted, but the value may be limited and replaced by a maximum or
minimum value.
Minimum, maximum, and default values for S-Registers may be altered with ConfigurACE.
3-8
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AT Command Reference Manual
T - Set Tone Dial Default
This command forces DTMF dialing until the next P dial modifier or P command is received. The modem will set an SRegister bit to indicate that all subsequent dialing should be conducted in tone mode. Note that the DP command will
override this command. Clears S14 bit 5.
This command may not be permitted in some countries. (See P.)
Result Code:
OK
Vn - Result Code Form
This command selects the sending of short-form or long-form result codes to the DTE. The parameter, if valid, is written to
S14 bit 3.
V0
Enables short-form (terse) result codes. Line feed is not issued before a short-form result code.
V1
Enables long-form (verbose) result codes. (Default.)
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
Wn - Connect Message Control
This command controls the format of CONNECT messages. The parameter value, if valid, is written to S31 bits 2 and 3.
Note that the Wn command can be overridden by register S95 bits (see S95 description).
W0
Upon connection, the modem reports only the DTE speed (e.g., CONNECT 19200). Subsequent
responses are disabled. (Default.)
W1
Upon connection, the modem reports the line speed, the error correction protocol, and the DTE
speed, respectively. Subsequent responses are disabled.
W2
Upon connection, the modem reports the DCE speed (e.g., CONNECT 14400). Subsequent
responses are disabled.
Result Codes:
1048
OK
n = 0, 1, or 2.
ERROR
Otherwise.
3-9
AT Command Reference Manual
Xn - Extended Result Codes
This command selects which subset of the result messages will be used by the modem to inform the DTE of the results of
commands.
Blind dialing is enabled or disabled by country parameters. If the user wishes to enforce dial tone detection, a "W" can be
placed in the dial string (see D command). Note that the information below is based upon the default implementation of the X
results table. Table 3-1 indicates the messages which are enabled for each X value.
If the modem is in facsimile mode (+FCLASS=1 or 2), the only message sent to indicate a connection is CONNECT without
a speed indication.
X0
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER result codes. Blind dialing is
enabled/disabled by country parameters. If busy tone detection is enforced and busy tone is
detected, NO CARRIER will be reported. If dial tone detection is enforced or selected and dial
tone is not detected, NO CARRIER will be reported instead of NO DIAL TONE. The value 000b is
written to S22 bits 6, 5, and 4, respectively.
X1
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and CONNECT XXXX (XXXX =
rate). Blind dialing enabled/disabled by country parameters. If busy tone detection is enforced and
busy tone is detected, NO CARRIER will be reported instead of BUSY. If dial tone detection is
enforced or selected and dial tone is not detected, NO CARRIER will be reported instead of NO
DIAL TONE. The value 100b is written to S22 bits 6, 5, and 4, respectively.
X2
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, NO DIALTONE, NO ANSWER, and CONNECT
XXXX. If busy tone detection is enforced and busy tone is detected, NO CARRIER will be
reported instead of BUSY. If dial tone detection is enforced or selected and dial tone is not
detected, NO DIAL TONE will be reported instead of NO CARRIER. The value 101b is written to
S22 bits 6, 5, and 4, respectively.
X3
Enables monitoring of busy tones; send only OK, CONNECT, RING, NO CARRIER, ERROR, NO
ANSWER, and CONNECT XXXX. Blind dialing is enabled/disabled by country parameters. If dial
tone detection is enforced and dial tone is not detected, NO CARRIER will be reported. The value
110b is written to S22 bits 6, 5, and 4, respectively.
X4
Enables monitoring of busy tones; send all messages. The value 111b is written to S22 bits 6, 5,
and 4, respectively. (Default.)
Result Codes:
3-10
OK
n = 0 to 4.
ERROR
Otherwise.
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AT Command Reference Manual
Table 3-1. Result Codes
Short Form
Long Form
n Value in ATXn Command
1048
Notes
OK
CONNECT
RING
NO CARRIER
ERROR
CONNECT 1200
NO DIALTONE
BUSY
NO ANSWER
CONNECT 0600
10
CONNECT 2400
11
CONNECT 4800
12
CONNECT 9600
13
CONNECT 7200
14
CONNECT 12000
15
CONNECT 14400
16
CONNECT 19200
17
CONNECT 38400
18
CONNECT 57600
19
CONNECT 115200
20
CONNECT 230400
22
CONNECT 75TX/1200RX
23
CONNECT 1200TX/75RX
24
DELAYED
32
BLACKLISTED
33
FAX
35
DATA
40
CARRIER 300
44
CARRIER 1200/75
45
CARRIER 75/1200
46
CARRIER 1200
47
CARRIER 2400
48
CARRIER 4800
49
CARRIER 7200
50
CARRIER 9600
51
CARRIER 12000
52
CARRIER 14400
53
CARRIER 16800
Note 2
54
CARRIER 19200
Note 2
55
CARRIER 21600
Note 2
56
CARRIER 24000
Note 2
57
CARRIER 26400
Note 2
58
CARRIER 28800
Note 2
59
CONNECT 16800
Note 2
61
CONNECT 21600
Note 2
62
CONNECT 24000
Note 2
Note 4
3-11
AT Command Reference Manual
Table 3-1. Result Codes (Cont'd)
Short Form
Long Form
n Value in ATXn Command
Notes
63
CONNECT 26400
Note 2
64
CONNECT 28800
Note 2
66
COMPRESSION: CLASS 5
67
COMPRESSION: V.42 bis
69
COMPRESSION: NONE
70
PROTOCOL: NONE
77
PROTOCOL: LAPM
78
CARRIER 31200
Note 3
79
CARRIER 33600
Note 3
80
PROTOCOL: ALT
81
PROTOCOL: ALT-CELLULAR
84
CONNECT 33600
91
CONNECT 31200
Note 3
150
CARRIER 32000
Note 4
151
CARRIER 34000
Note 4
152
CARRIER 36000
Note 4
153
CARRIER 38000
Note 4
154
CARRIER 40000
Note 4
155
CARRIER 42000
Note 4
156
CARRIER 44000
Note 4
157
CARRIER 46000
Note 4
158
CARRIER 48000
Note 4
159
CARRIER 50000
Note 4
160
CARRIER 52000
Note 4
161
CARRIER 54000
Note 4
162
CARRIER 56000
Note 4
165
CONNECT 32000
Note 4
166
CONNECT 34000
Note 4
167
CONNECT 36000
Note 4
168
CONNECT 38000
Note 4
169
CONNECT 40000
Note 4
170
CONNECT 42000
Note 4
171
CONNECT 44000
Note 4
172
CONNECT 46000
Note 4
173
CONNECT 48000
Note 4
174
CONNECT 50000
Note 4
175
CONNECT 52000
Note 4
176
CONNECT 54000
Note 4
177
CONNECT 56000
Note 4
+F4
+FCERROR
Note 3
Notes:
1.
2.
3.
4.
3-12
An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be
generated when that particular value of 'n' (shown at the top of the column) has been selected by the use of ATXn. If the
column is blank, then no message will be generated for that x option. A numeral indicates which less explicit message
(verbose or short form) will be output for that X option. (Also, see Section 3.3).
RC288 and higher rate modems.
RC336 and higher rate modems.
RC56 modems.
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AT Command Reference Manual
Yn - Long Space Disconnect
This command enables/disables the generation and response to long space disconnect. The parameter value, if valid, is
written to S21 bit 7.
Y0
Disables long space disconnect. (default.)
Y1
Enables long space disconnect. In non-error correction mode, the modem will send a long space
of four seconds prior to going on-hook. In non-error correction mode, the modem will respond to
the receipt of a long space (i.e., a break signal greater than 1.6 seconds) by going on-hook.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
Zn - Soft Reset and Restore Profile
The modem performs a soft reset and restores (recalls) the configuration profile according to the parameter supplied. If no
parameter is specified, zero is assumed.
Z0
Soft reset and restore stored profile 0.
Z1
Soft reset and restore stored profile 1.
Result Codes:
1048
OK
n = 0 or 1.
ERROR
Otherwise.
3-13
AT Command Reference Manual
3.2.2 AT& Commands
&Cn - RLSD (DCD) Option
The modem controls the RLSD output in accordance with the parameter supplied. The parameter value, if valid, is written to
S21 bit 5.
&C0
RLSD remains ON at all times.
&C1
RLSD follows the state of the carrier. (Default.)
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
&Dn - DTR Option
This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter
supplied. The parameter value, if valid, is written to S21 bits 3 and 4. Also, see S25.
&D0 -
&D1
DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q5, &Q6
DTR is ignored (assumed ON). Allows operation with DTEs which do
not provide DTR.
&Q1, &Q4
DTR drop causes the modem to hang up. Auto-answer is not affected.
&Q2, &Q3
DTR drop causes the modem to hang up. Auto-answer is inhibited.
DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q4, &Q5, &Q6
DTR drop is interpreted by the modem as if the asynchronous
escape sequence had been entered. The modem returns to
asynchronous command state without disconnecting.
&Q2, &Q3
&D2
DTR drop is interpreted according to the current &Qn setting as follows:
&Q0 through &Q6
&D3
DTR drop causes the modem to hang up. Auto-answer is inhibited.
DTR drop causes the modem to hang up. Auto-answer is inhibited.
(Default.)
DTR drop is interpreted according to the current &Qn setting as follows:
&Q0, &Q1, &Q4, &Q5, &Q6
DTR drop causes the modem to perform a soft reset as if the
Z command were received. The &Y setting determines which profile is
loaded.
&Q2, &Q3
DTR drop causes the modem to hang up. Auto-answer is inhibited.
If &Q5, &Q6, +FCLASS=1 or +FCLASS=2 is in effect, the action taken is the same as for &Q0.
&Fn - Restore Factory Configuration (Profile)
The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the
S-Register descriptions. A configuration (profile) consists of a subset of S-Registers.
&F0
Restore factory configuration 0.
&F1
Restore factory configuration 1.
Result Codes:
OK
ERROR
3-14
If the modem is connected.
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AT Command Reference Manual
&Gn - Select Guard Tone
The modem generates the guard tone selected by this command according to the parameter supplied (DPSK modulation
modes only). The parameter value, if valid, is written to S23 bits 6 and 7.
&G0
Disables guard tone. (Default for US models.)
&G1
Disables guard tone.
&G2
Selects 1800 Hz guard tone. (Default for W-class models.)
This command may not be permitted in some countries.
Result Codes:
OK
n = 0 to 2.
ERROR
Otherwise.
&Jn - Telephone Jack Control
This command is included only for compatibility and performs no function except to load the S-Register. The parameter
value, if valid, is written S21 bit 1.
&J0
&J0 command. (Default.)
&J1
&J1 command.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
&Kn - Flow Control
This command defines the DTE/DCE (terminal/modem) flow control mechanism. The parameter value, if valid, is written to
S39 bits 0, 1, and 2.
&K0
Disables flow control.
&K3
Enables RTS/CTS flow control. (Default for data modem modes.)
&K4
Enables XON/XOFF flow control.
&K5
Enables transparent XON/XOFF flow control.
&K6
Enables both RTS/CTS and XON/XOFF flow control. (Default for fax modem and voice modes.)
Result Codes:
OK
n = 0, 3, 4, 5, or 6.
ERROR
Otherwise.
&Ln - Leased Line Operation
This command requests leased line or dial-up operation. This command is provided for compatibility only; no mode change is
performed, dial-up operation continues. The OK response is returned for a valid parameter, but no other action is performed.
The parameter value, if valid, is written to S27 bit 2.
&L0
Requests dial-up operation. Dial-up operation continues.
Result Codes:
1048
OK
n = 0.
ERROR
Otherwise.
3-15
AT Command Reference Manual
&Mn - Asynchronous/Synchronous Mode Selection
This command determines the DTR operating mode. The modem treats the &M command as a subset of the &Q command.
&M0
Selects direct asynchronous operation. Note that the command sequence &M0\N0 selects normal
buffered mode, but the command sequence \N0&M0 selects direct mode. This is because the \N0
command is analogous to the &Q6 command. The value 000b is written to S27 bits 3, 1, and 0,
respectively. (See &Q).
&M1
Selects synchronous connect mode with async off-line command mode. The value 001b is written
to S27 bits 3, 1, and 0, respectively. (Serial interface operation only.)
&M2
Selects synchronous connect mode with async off-line command mode. Same as &M1 except
that &M2 enables DTR dialing of directory slot 0. The modem will disconnect if DTR is OFF for
more than the period in S25 (in units of hundredths of a second): the data connection will be
synchronous. The value 010b is written to S27 bits 3, 1, and 0, respectively. (Serial interface
operation only.)
&M3
Selects synchronous connect mode. This mode allows DTR to act as a talk/data switch. The call
is manually initiated while DTR is inactive. When DTR becomes active, the handshake proceeds
in originate or answer mode according to S14 bit 7. The value 011b is written to S27 bits 3, 1, and
0, respectively. (Serial interface operation only.)
Result Codes:
OK
n = 0 to 3.
ERROR
Otherwise.
&Pn - Select Pulse Dial Make/Break Ratio
This command determines the make/break ratio used during pulse dialing. It is only effective if the appropriate bit to enable
this command is set through the ConfigurACE program. If enabled, it will override the make/break ratios in the OEM
parameters in ConfigurACE. The default is country-dependent. The parameter value, if valid, is written to S28 bits 3 and 4.
&P0
Selects 39%-61% make/break ratio at 10 pulses per second. (Default.)
&P1
Selects 33%-67% make/break ratio at 10 pulses per second.
&P2
Selects 39%-61% make/break ratio at 20 pulses per second.
&P3
Selects 33%-67% make/break ratio at 20 pulses per second.
Result Codes:
3-16
OK
n = 0 to 3.
ERROR
Otherwise.
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AT Command Reference Manual
&Qn - Sync/Async Mode
This command is an extension of the &M command and is used to control the connection modes permitted. It is used in
conjunction with S36 and S48. (Also, see \N.)
NOTE: When the &Q0 to &Q4 command is issued to select the mode, the subsequent connect message will report the DCE
speed regardless of the W command and S95 settings.
&Q0
Selects direct asynchronous operation. The value 000b is written to S27 bits 3, 1, and 0,
respectively. See &M0.
&Q1
Selects synchronous connect mode with async off-line command mode. The value 001b is written
to S27 bits 3, 1, and 0, respectively. See &M1. (Serial interface operation only.)
&Q2
Selects synchronous connect mode with async off-line command mode and enables DTR dialing
of directory 0. The value 010b is written to S27 bits 3, 1, and 0, respectively. See &M2. (Serial
interface operation only.)
&Q3
Selects synchronous connect mode with async off-line command mode and enables DTR to act
as Talk/Data switch. The value 011b is written to S27 bits 3, 1, and 0, respectively. See &M3.
(Serial interface operation only.)
&Q4
Selects AutoSync operation. The value 100b is written to S27 bits 3, 1, and 0, respectively.
AutoSync operation, when used in conjunction with the Hayes Synchronous Interface (HSI)
capability in the DTE, provides synchronous communication capability from an asynchronous
terminal.
Starting AutoSync. Set registers S19, S20, and S25 to the desired values before selecting
AutoSync operation with &Q4. After the CONNECT message is issued, the modem waits the
period of time specified by S25 before examining DTR. If DTR is on, the modem enters the
synchronous operating state; if DTR is off, the modem terminates the line connection and returns
to the asynchronous command state.
Stopping AutoSync. AutoSync operation is stopped upon loss of carrier or the on-to-off
transition of DTR. Loss of carrier will cause the modem to return to the asynchronous command
state. An on-to-off transition of DTR will cause the modem to return to the asynchronous
command state and either not terminate the line connection (&D1 active) or terminate the line
connection (any other &Dn command active).
&Q5
The modem will try to negotiate an error-corrected link. The modem can be configured using S36
to determine whether a failure will result in the modem returning on-hook or will result in fallback
to an asynchronous connection. The value 101b is written to S27 bits 3, 1, and 0, respectively.
(Default.)
&Q6
Selects asynchronous operation in normal mode (speed buffering). The value 110b is written to
S27 bits 3, 1, and 0, respectively.
Result Codes:
1048
OK
n = 0 to 6.
ERROR
Otherwise.
3-17
AT Command Reference Manual
&Rn - RTS/CTS Option
This selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &K
command). The parameter value, if valid, is written to S21 bit 2.
&R0
In sync mode, CTS tracks the state of RTS; the RTS-to-CTS delay is defined by S26. In async
mode, CTS is normally ON and will turn OFF only if required by flow control.
&R1
In sync mode, CTS is always ON (RTS transitions are ignored). tracks the state of RTS; In async
mode, CTS is normally ON and will turn OFF only if required by flow control.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
&Sn - DSR Override
This command selects how the modem will control DSR. The parameter value, if valid, is written to S21 bit 6.
&S0
DSR will remain ON at all times. (Default.)
&S1
DSR will become active after answer tone has been detected and inactive after the carrier has
been lost.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
&Tn - Test and Diagnostics
The modem will perform selected test and diagnostic functions according to the parameter supplied. A test can be run only
when in an asynchronous operation in non-error-correction mode (normal or direct mode). To terminate a test in progress,
the escape sequence must be entered first, except for parameters 7 and 8 (see Section 3.1.3). If S18 is non-zero, a test will
terminate automatically after the time specified by S18 and display the OK message. Note: For tests 3, 6, and 7, a
connection between the two modems must first be established.
3-18
&T0
Terminates test in progress. Clears S16.
&T1
Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists when this
command is issued, the modem hangs up. The CONNECT XXXX message is displayed upon the
start of the test.
&T2
Returns ERROR.
&T3
Initiates local digital loopback, V.54 Loop 2. Sets S16 bit 2. If no connection exists, ERROR is
returned. Sets S16 bit 4 when the test is in progress.
&T4
Enables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote
modem is allowed. Sets S23 bit 0.
&T5
Disables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote
modem is denied. Clears S23 bit 0. (Default.)
&T6
Requests a remote digital loopback (RDL), V.54 Loop 2, without self test. If no connection exists,
ERROR is returned. Sets S16 bit 4 when the test is in progress. The CONNECT XXXX message
is displayed upon the start of the test.
&T7
Requests a remote digital loopback (RDL),V.54 Loop 2, with self test. (In self test, a test pattern is
looped back and checked by the modem.) If no connection exists, ERROR is returned. When the
test is terminated either via expiration of S18, or via the &T0 or H command, the number of
detected errors is reported to the DTE. Sets S16 bit 5 when the test is in progress.
&T8
Initiates local analog loopback, V.54 Loop 3, with self test. (In self test, a test pattern is looped
back and checked by the modem.) If a connection exists, the modem hangs up before the test is
initiated. When the test is terminated either via expiration of S18, or via the &T0 or H command,
the number of detected errors is reported to the DTE. Sets S16 bit 6 when the test is in progress.
This command may not be available in some countries due to PTT restrictions.
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AT Command Reference Manual
&V - Display Current Configuration and Stored Profiles
Reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone numbers. The stored
profiles and telephone numbers are not displayed if the NVRAM is not installed or is not operational as detected by the
NVRAM test during reset processing.
Result Code:
OK
Example:
AT&V
ACTIVE PROFILE:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 &Y0
S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002 S09:006
S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138
S48:007 S95:000
STORED PROFILE 0:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
STORED PROFILE 1:
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000
TELEPHONE NUMBERS:
0 =
1 =
2 =
3 =
OK
3.2.3 &V1 - Display Last Connection Statistics
Displays the last connection statistics in the following format (shown with typical results):
TERMINATION REASON.......... LINK DISCONNECT or LOCAL REQUEST
LAST TX data rate........... 33600 BPS
HIGHEST TX data rate........ 33600 BPS
LAST RX data rate........... 28800 BPS
HIGHEST RX data rate........ 28800 BPS
Error correction PROTOCOL... LAPM
Data COMPRESSION............ V42Bis
Line QUALITY................ 030
Highest SPX RX state........ 068
Highest SPX TX state........ 067
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AT Command Reference Manual
&Wn - Store Current Configuration
Saves the current (active) configuration (profile), including S-Registers, in one of the two user profiles in NVRAM as denoted
by the parameter value. This command will yield an ERROR message if the NVRAM is not installed or is not operational as
detected by the NVRAM test.
The current configuration is comprised of a list of storable parameters illustrated in the &V command. These settings are
restored to the active configuration upon receiving an Zn command or at power up (see &Yn command).
&W0
Store the current configuration as profile 0.
&W1
Store the current configuration as profile 1.
Result Codes:
OK
n = 0 or 1.
ERROR
Otherwise.
&Xn - Select Synchronous Clock Source
Selects the source of the transmit clock for the synchronous mode of operation. The parameter value, if valid, is written to
S27 bits 4 and 5.
In asynchronous mode, the transmit and receive clocks are turned OFF. In synchronous mode, the clocks are turned ON
with the frequency of 1200 Hz or faster corresponding to the speed that is selected for modem operation.
&X0
Selects internal timing. The modem generates the transmit clock signal and applies it to the
TXCLK output at the serial interface.
&X1
Selects external timing. The local DTE sources the transmit clock signal on the XTCLK input of
the serial interface. The modem applies this clock to the TXCLK output at the serial interface.
&X2
Selects slave receive timing. The modem derives the transmit clock signal from the incoming
carrier and applies it to the TXCLK output at the serial interface.
Result Codes:
OK
n = 0 to 2.
ERROR
Otherwise.
&Yn - Designate a Default Reset Profile
Selects which user profile will be used after a hard reset.
&Y0
The modem will use profile 0.
&Y1
The modem will use profile 1.
Result Codes:
OK
n = 0 to 1.
ERROR
If n > 1, or if NVRAM is not installed or is not operational.
&Zn=x - Store Telephone Number
The modem can store up to four telephone numbers and each telephone number dial string can contain up to 34 digits.
&Zn=x
n = 0 to 3 and x = dial string. (Requires 256-byte NVRAM.)
Result Codes:
3-20
OK
For n ≤ 3, and x ≤ 34 digits.
ERROR
If n > 3, x > 35 digits, or if NVRAM is not installed or is not operational.
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AT Command Reference Manual
3.2.4 AT% Commands
%En - Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward
Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back when
line quality is insufficient or fall forward when line quality is sufficient (%E2). The parameter value, if valid, is written to S41
bits 2 and 6.
If enabled, the modem attempts to retrain for a maximum of 30 seconds.
%E0
Disable line quality monitor and auto-retrain.
%E1
Enable line quality monitor and auto-retrain.
%E2
Enable line quality monitor and fallback/fall forward. (Default.)
Result Codes:
OK
n = 0, 1, or 2.
ERROR
Otherwise.
Fallback/Fall Forward. When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient,
the modem will initiate a rate renegotiation to a lower speed within the V.34/V.32 bis/V.32 (RC288) or V.32 bis/V.32 (RC144)
modulation speeds. The modem will keep falling back within the current modulation if necessary until the speed reaches
2400 bps (V.34) or 4800 bps (V.32). Below this rate, the modem will only do retrains if EQM thresholds are exceeded. If the
EQM is sufficient for at least one minute, the modem will initiate a rate renegotiation to a higher speed within the current
modulation speeds. The rate renegotiations will be done without a retrain if a V.32 bis connection is established.
Speeds attempted during fallback/fall forward are those shown to be available in the rate sequences exchanged during the
initial connection. Fallback/fall forward is available in error correction and normal modes, but not in direct mode or
synchronous mode with external clocks.
%L - Line Signal Level
Returns a value which indicates the received signal level. The value returned is a direct indication (DAA dependent) of the
receive level at the MDP, not at the telephone line connector. For example, 009 = -9 dBm, 043 = -43 dBm, and so on.
Result Codes:
OK
%Q - Line Signal Quality
Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based on the EQM value,
retrain or fallback/fall forward may be initiated if enabled by %E1 or %E2.
Example:
AT%Q
015
Result Codes:
1048
OK
If connected.
ERROR
If not connected, or connected in 300 bps, V.23, or fax modes.
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AT Command Reference Manual
%7 - Plug and Play Serial Number
%7<8 hex numbers> - Sets Plug and Play Serial Number
Sets and stores eight serial numbers in hex format used for serial Plug and Play and for ISA Plug and Play which use the
Rockwell 11575 Plug and Play device.
Example:
AT%7<8 hex numbers>
Result Codes:
OK
<8 hex numbers>
ERROR
Otherwise
To display the stored serial number, issue AT"?.
%8 - Plug and Play Vendor ID and Product Number
Sets and stores Vendor ID and product number for serial Plug and Play and for ISA Plug and Play which use the Rockwell
11575 Plug and Play device.
Example:
AT%8<3 ASCII characters><4 hex numbers>
Result Codes:
3-22
OK
<3 ASCII characters><4 hex numbers>
ERROR
Otherwise
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AT Command Reference Manual
3.2.5 AT\ Commands
\Kn - Break Control
Controls the response of the modem to a break received from the DTE or the remote modem or the \B command according
to the parameter supplied. The parameter value, if valid, is written to S40 bits 3, 4, and 5.
The response is different in three separate states.
The first state is where the modem receives a break from the DTE when the modem is operating in data transfer mode:
\K0
Enter on-line command mode, no break sent to the remote modem.
\K1
Clear data buffers and send break to remote modem.
\K2
Same as 0.
\K3
Send break to remote modem immediately.
\K4
Same as 0.
\K5
Send break to remote modem in sequence with transmitted data. (Default.)
The second case is where the modem is in the on-line command state (waiting for AT commands) during a data connection,
and the \B is received in order to send a break to the remote modem:
\K0
Clear data buffers and send break to remote modem.
\K1
Clear data buffers and send break to remote modem. (Same as 0.)
\K2
Send break to remote modem immediately.
\K3
Send break to remote modem immediately. (Same as 2.)
\K4
Send break to remote modem in sequence with data.
\K5
Send break to remote modem in sequence with data. (Same as 4.) (Default.)
The third case is where a break is received from a remote modem during a non-error corrected connection:
\K0
Clears data buffers and sends break to the DTE.
\K1
Clears data buffers and sends break to the DTE. (Same as 0.)
\K2
Send a break immediately to DTE.
\K3
Send a break immediately to DTE. (Same as 2.)
\K4
Send a break in sequence with received data to DTE.
\K5
Send a break in sequence with received data to DTE. (Same as 4.) (Default.)
Result Codes:
1048
OK
n = 0 to 5.
ERROR
Otherwise.
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AT Command Reference Manual
\Nn - Operating Mode
This command controls the preferred error correcting mode to be negotiated in a subsequent data connection. This
command is affected by the OEM firmware configuration.
\N0
Selects normal speed buffered mode (disables error-correction mode). (Forces &Q6.)
\N1
Serial interface selected - Selects direct mode and is equivalent to &M0, &Q0 mode of operation.
(Forces &Q0.)
Parallel interface selected - Same as \N0.
\N2
Selects reliable (error-correction) mode. The modem will first attempt a LAPM connection and
then an MNP connection. Failure to make a reliable connection results in the modem hanging up.
(Forces &Q5, S36=4, and S48=7.)
\N3
Selects auto reliable mode. This operates the same as \N2 except failure to make a reliable
connection results in the modem falling back to the speed buffered normal mode. (Forces &Q5,
S36=7, and S48=7.)
\N4
Selects LAPM error-correction mode. Failure to make an LAPM error-correction connection
results in the modem hanging up. (Forces &Q5 and S48=0.) Note: The -K1 command can
override the \N4 command.
\N5
Selects MNP error-correction mode. Failure to make an MNP error-correction connection results
in the modem hanging up. (Forces &Q5, S36=4, and S48=128.)
Result Codes:
OK
n = 0 to 5.
ERROR
Otherwise.
\Vn - Single Line Connect Message Enable
The single line connect message format can be enabled or disabled by the \Vn command as follows:
\V0
Connect messages are controlled by the command settings X, W, and S95.
\V1
Connect messages are displayed in the single line format described below subject to the
command settings V (Verbose) and Q (Quiet). In Non-Verbose mode (V0), single line connect
messages are disabled and a single numeric result code is generated for CONNECT DTE.
When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSION messages apart
from the fields described below.
The single line connect message format is:
CONNECT /
Where:
[,[][,[][,[][,[][,[< rb_signaling>]]]]]]
Notes:
1.
For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, in which case the +MS
subparameters will modified to reflect the Nn and S37=x settings. Use of the Nn and S37=x commands is not
recommended but is provided for compatibility with existing communication software. (S37 is not updated by the +MS
command.)
2.
Subparameters not entered (enter a comma only or to skip the last subparameter) remain at their current values.
Reporting Selected Options
The modem can send a string of information to the DTE consisting of selected options using the following command:
+MS?
The response is:
+MS: ,,,,,
For example,
+MS: 56,1,300,56000,0,0
[RC56 default values]
+MS: 11,1,300,33600,0,0
[RC336 default values]
+MS: 10,1,300,14400,0,0
[RC144 default values]
Reporting Supported Options
The modem can send a string of information to the DTE consisting of supported options using the following command:
+MS=?
The response is:
+MS: (list of supported values), (list of supported values),(list of supported values),
(list of supported values), (list of supported values), (list of supported values)
For example,
1048
+MS: (0,1,2,3,9,10,11,56, 64,69),(0,1),(300-33600),(300-56000),(0,1),(0,1)
[RC56]
+MS: (0,1,2,3,9,10,11,64,69),(0,1),(300-33600),(300-33600),(0,1),(0,1)
[RC336]
+MS: (0,1,2,3,9,10,64,69),(0,1),(300-14400),(300-14400),(0,1),(0,1)
[RC144]
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AT Command Reference Manual
Subparameter Definitions
1.
= A decimal number which specifies the preferred modulation (automode enabled) or the modulation (automode
disabled) to use in originating or answering a connection. The options are:
Modulation
10
11
V.21
V.22
V.22 bis
V.23
V.32
V.32 bis
V.34
56
K56flex
Possible Rates (bps) 1
300
1200
2400 or 1200
1200
9600 or 4800
14400, 12000, 9600, 7200, or 4800
33600, 31200, 28800, 26400, 24000, 21600,
19200, 16800, 14400, 12000, 9600, 7200, 4800, or
2400
56000, 54000, 52000, 50000, 48000, 46000,
44000, 42000, 40000, 38000, 36000, 34000, 32000
300
1200
Notes
See Note 2
Default for RC144
Default for RC56/RC336/RC288
[RC56/RC336/RC288 only]
[RC56 only]
Bell 103
64
Bell 212
69
Notes:
1. See optional , , and subparameters.
2. For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering modes transmit at 1200 bps
and receive at 75 bps. The rate is always specified as 1200 bps.
The modem may also automatically switch to another modulation (automode), subject to the following constraints:
2.
a.
The modem may not be able to automatically switch from the current modulation (specified by ) to some
other modulation. For example, there is no standard way to automode from Bell 103 to V.23.
b.
The DTE may disable automode operation (see below).
c.
The DTE may constrain the range of modulations available by specifying the lowest and highest rates (see
and below).
is an optional numeric value which enables or disables automatic modulation negotiation using V.8 bis/V.8
or V.32 bis Annex A. The options are:
Option Selected
Automode disabled
Automode enabled using V.8 bis/V.8 or V.32 Annex A
Notes
Default
The default value is 1, which enables automode. Note, however, there are modulations for which there is no automatic
negotiation, e.g., Bell 212 ( = 69).
For = 0 (automode disabled, i.e., fixed modulation):
a.
If is within the rates supported by the selected modulation, the selected rate is that specified by
. For example:
+MS=10,0,1200,4800 selects V.32 bis 4800 bps fixed rate.
b.
If is greater than the highest speed supported by the modulation specified by , the starting
rate is the highest rate supported by the selected modulation. For example:
+MS=10,0,2400,14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.
3-26
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AT Command Reference Manual
c.
To emulate issuance of the N0S37=x command sequence to select fixed mode operation, specify the
and both to be the (same) requested speed, and to be the modulation for that
speed. For example:
+MS=11,0,16800,16800 selects V.34 16800 bps fixed mode (no comparable S37 command).
+MS=10,0,12000,12000 selects V.32 bis 12000 bps fixed mode (same as N0S37=10).
For = 1 (automode enabled, i.e., automatically selected speed and modulation):
The modem connects at the highest possible rate in accordance with V.8 bis/V.8, or V.32 bis Annex A if V.8 bis/V.8 is
not supported by the remote modem.
a.
If is greater than the highest rate supported by the modulation specified by , the modem
automodes down from the highest rate of the selected modulation. For example:
+MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps.
b.
To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate to start
automoding down from using and , respectively. Set to 300 to allow automoding
all the way down to V.21 300 bps. For example:
+MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable S37 command).
+MS=9,1,300,12000 selects automode starting at V.32 bis 12000 bps (same as N1S37=10).
3.
is an optional number which specifies the lowest rate at which the modem may establish a connection. The
value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps. The default is 300 for
300 bps.
4.
is an optional number which specifies the highest rate at which the modem may establish a connection. The
value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate to be 14400 bps. The default is 28800 for
28800 bps.
5.
is an optional number which specifies the codec type. The options are:
0 = µ-Law
1 = A-Law
Note that ATZ will reset the selection to 0 (µ-Law).
6.
is an optional number which enables or disables robbed bit signaling generation in a server modem or
enables or disables robbed bit signaling detection in a client modem. The options are:
0 = Robbed bit signaling generation (server modem ) or detection (client modem) disabled (default)
1 = Robbed bit signaling generation (server modem ) or detection (client modem) enabled
Note that ATZ will reset the selection to 0 (disabled).
Result Codes:
1048
OK
Valid subparameter string
ERROR
Otherwise.
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AT Command Reference Manual
+Hn - Enable/Disable RPI and DTE Speed
This command enables or disables Rockwell Protocol Interface (RPI) processing and sets the DTE speed. (Applicable only
to modems supporting RPI and RPI+).
+H0
Disable protocol interface and video ready mode.
+H1
Enable RPI mode and set DTE speed to 19200 bps.
+H2
Enable RPI mode and set DTE speed to 38400 bps.
+H3
Enable RPI mode and set DTE speed to 57600 bps.
+H11
Enable RPI+ mode (applicable only to modems supporting RPI). When in RPI+ mode, a link is
established between the modem and the WinRPI or WinRPI95 host PC software driver to allow
the modem to support protocol (V.42bis/LAP-M/MNP2-5) connections with a remote modem. This
command should only be used when the WinRPI or WinRPI95 driver software is installed in the
PC.
+H16
Enable video ready mode
Result Codes:
3-28
OK
n = 0 to 3, 11, 16.
ERROR
Otherwise.
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AT Command Reference Manual
3.2.7 AT** Command
** - Download to Flash Memory
The linear flash memory downloader in the modem firmware allows flash memory connected to the modem external memory
bus to be upgraded with revised modem firmware. This process transfers (uploads) the upgraded modem firmware (data)
from the host computer to the modem which transfers (downloads) the data to the flash memory device. Note that this
downloader function must be provided in modem MCU firmware initially installed in external flash memory, i.e., the
downloader does not support the programming of blank flash memory.
Programming the flash memory device is a two-step process.
1.
When the AT** command is issued, the modem firmware boot loader is invoked and the user will first load a flash load
module (FLM) into the modem's RAM. The FLM contains the programming algorithm for the flash memory device being
programmed and any messages that may be sent during the load process.
2.
The user will then load the new modem firmware which the FLM will then program into the flash memory device.
Procedure:
1.
Install in the modem a flash memory programmed with the modem firmware; ensure that the flash memory device is
programmed with the sector secure mode set to UNSECURE (AMD only), otherwise the device cannot be reprogrammed in the modem.
2.
Put the FLM file and the new modem firmware file (e.g., V1400DS.S37) in an appropriate directory on the computer's
hard disk.
3.
Configure the communications application program for a DTE rate of between 9600 bps and 57600 bps (57600 bps is
faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2 minutes; a load at 19200 bps will take
approximately 6 minutes.
4.
Check the modem for response by typing AT.
5.
Initiate the download process using the AT**n command, where:
AT** or AT**0 Download speed is the last sensed speed (recommended command).
AT**1
Download speed is 38.4k bps.
AT**2
Download speed is 57.6k bps.
The "Download Initiated" message appears upon issuing the AT**n command.
6.
Perform an ASCII upload of the FLM file (e.g., AMDE.S37) from the host computer to the modem RAM using an
industry standard communications software or an equivalent process (ensure that all ASCII translation or pacing is
turned off).
To abort the load at this point, wait for the FLM download process to time-out, send a bad S37 record, or reset (POR)
the modem. If the load process times-out, the modem must be reset (ATZ) before the FLM can be loaded again.
7.
After the FLM has been loaded, perform an ASCII upload of the new modem firmware hex file (e.g., RC288ACi.S37)
from the host computer to the modem RAM using an industry standard communications software or an equivalent
process. There will be a 3-second pause after the first record of the RC288AXX.S37 file is sent, which is the FLASH
erase cycle. There is no turning back at this point.
If the flash download fails (because of a bad .S37 record for example) or the upload is aborted, as long as the modem
is not turned off or reset, it will remain in the flash load cycle and the upload can be re-attempted at step 7.
A "Wrong Device" message is displayed if an incorrect FLM is used. In this case, restart at step 5 and upload the
correct FLM file.
A "Wrong Hex file or flow control" message is displayed if an incompatible hex file format is used (non-Motorola S3
format) or if the DTE ignores flow control (the flash download uses both Xon/Xoff and RTS/CTS flow control). If the
wrong format was used, reinitiate the upoad at step 7 using a correct firmware hex file.
8.
A "Device successfully programmed" message is displayed by the FLM at the completion of a successful download and
the modem will do a cold start.
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AT Command Reference Manual
3.2.8 AT- Commands
-SDR=n - Enable/Disable Distinctive Ring
This command enables or disables detection and reporting of distinctive ring. The syntax is AT-SDR=n, where n is a number
from 0 to 7. One, two, or three distinctive ring types can be simultaneously enabled depending upon the value of n (bit
mapped). The detected ring type is reported in the long form (verbose) of the result code by appending the ring type number
to the end of the RING message.
-SDR=0
-SDR=1
-SDR=2
-SDR=3
-SDR=4
-SDR=5
-SDR=6
-SDR=7
Disables Distinctive Ring. Any valid ring detected is reported as RING (default).
Enables Distinctive Ring Type 1.
Enables Distinctive Ring Type 2.
Enables Distinctive Ring Type 1 and 2.
Enables Distinctive Ring Type 3.
Enables Distinctive Ring Type 1 and 3.
Enables Distinctive Ring Type 2 and 3.
Enables Distinctive Ring Type 1, 2, and 3.
Result Codes:
OK
n = 0 to 7.
ERROR
Otherwise.
The n value bit map is:
Bit 0=1
Enable RING type 1. RING type 1 is detected and reported as RING1.
Bit 1=1
Enable RING type 2. RING type 2 is detected and reported as RING2.
Bit 2=1
Enable RING type 3. RING type 3 is detected and reported as RING3.
The ring types supported and the corresponding ring cadence detect criteria are:
Distinctive
Ring Type
Ring Cadence Detect Criteria
2.0 sec ON, 4.0 sec OFF.
0.8 sec ON, 0.4 sec OFF, 0.8 sec ON, 4.0 sec OFF.
0.4 sec ON, 0.2 sec OFF, 0.4 sec ON, 0.2 sec OFF, 0.8 sec ON, 4.0 sec OFF.
Notes:
1.
The Ring Indicate (RI) output does not toggle on the first ring if AT-SDR_0.
2.
The RI output waveform is the same for all ring types detected, i.e., RI is on for the total duration of the ring period.
3-30
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AT Command Reference Manual
3.3 ERROR DETECTION AND DATA COMPRESSION COMMANDS
3.3.1 AT% Commands
%C - Enable/Disable Data Compression
Enables or disables data compression negotiation. The modem can only perform data compression on an error corrected
link. The parameter value, if valid, is written to S41 bits 0 and 1.
%C0
Disables data compression. Resets S46 bit 1.
%C1
Enables MNP 5 data compression negotiation. Resets S46 bit 1.
%C2
Enables V.42 bis data compression. Sets S46 bit 1.
%C3
Enables both V.42 bis and MNP 5 data compression. Sets S46 bit 1. (Default.)
Result Codes:
OK
n = 0, 1, 2, or 3.
ERROR
Otherwise.
3.3.2 AT\ Commands
\An - Select Maximum MNP Block Size
The modem will operate an MNP error corrected link using a maximum block size controlled by the parameter supplied. The
parameter value, if valid, is written to S40 bits 6 and 7.
\A0
64 characters.
\A1
128 characters. (Default.)
\A2
192 characters.
\A3
256 characters.
Result Codes:
OK
n = 0 to 3.
ERROR
Otherwise.
\Bn - Transmit Break to Remote
In non-error correction mode, the modem will transmit a break signal to the remote modem with a length in multiples of 100
ms according to parameter specified. If a number in excess of 9 is entered, 9 is used. The command works in conjunction
with the \K command.
In error correction mode, the modem will signal a break through the active error correction protocol, giving no indication of
the length.
\B1-\B9
Break length in 100 ms units. (Default = 3.) (Non-error corrected mode only.)
Result Codes:
OK
If connected in data modem mode.
NO CARRIER
If not connected or connected in fax modem mode.
Note: When the modem receives a break from the remote modem, break is passed to the DTE as follows: In non-error
correction mode direct, the break length is passed; in non-error correction mode normal and in error correction mode, a 300
ms break is passed.
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3.4 MNP 10 COMMANDS
3.4.1 AT) Commands
)Mn - Enable Cellular Power Level Adjustment
This command is included only for compatibility and performs no function.
)M0
)M0 command.
)M1
)M1 command.
)M2
)M2 command.
Result Codes:
OK
n = 0 to 2.
ERROR
Otherwise.
*Hn - Link Negotiation Speed
This command is included only for compatibility and performs no function.
*H0
*H0 command.
*H1
*H1 command.
*H2
*H2 command.
Result Codes:
OK
n = 0 to 2.
ERROR
Otherwise.
-Kn - MNP Extended Services
Enables or disables conversion of a V.42 LAPM connection to an MNP 10 connection. The parameter value, if valid, is
written to S40 bits 0 and 1.
-K0
Disables V.42 LAPM to MNP 10 conversion. (Default.)
-K1
Enables V.42 LAPM to MNP 10 conversion.
-K2
Enables V.42 LAPM to MNP 10 conversion; inhibits MNP Extended Services initiation during V.42
LAPM answer mode detection phase.
Result Codes:
OK
n = 0 or 2.
ERROR
Otherwise.
-Qn - Enable Fallback to V.22 bis/V.22
This command is included only for compatibility and performs no function.
-Q0
-Q0 command.
-Q1
-Q1 command.
Result Codes:
3-32
OK
n = 0 or 1.
ERROR
Otherwise.
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-SEC=n - Enable/Disable MNP10-EC
Enables or disables MNP10-EC operation. The command format is:
-SEC=n,[]
where is the optional transmit level sub parameter.
-SEC=0
Disable MNP10-EC; the transmit level is that defined in S91.
-SEC=1,[]
Enable MNP10-EC; the transmit level will be defined by the sub parameter
range 0 to 30 (0 dBm to -30 dBm), the default ( not specified) is the
S91 value.
Result Codes:
OK
n=0, 1, or 1 and =0 to 30
ERROR
Otherwise
Example: AT-SEC=1,18 enables MNP10-EC and sets the transmit level to -18 dBm.
Note: If AT-SEC=0, the modem will automatically set AT-SEC=1 if the remote modem indicates Cellular in the V.8 bis/V.8
phase or if a Cellular Driver is loaded and the Cell Phone is attached.
Inquiries
AT-SEC?
Retrieves the current -SEC command settings, e.g., 1,18.
@Mn - Initial Cellular Power Level Setting
This command is included only for compatibility and performs no function.
@M0
@M0 command.
@M30
@M30 command.
Result Codes:
OK
n = 0 to 30.
ERROR
Otherwise.
:E - Compromise Equalizer Enable Command
This command is included only for compatibility and performs no function.
:E0
:E0 command.
:E1
:E1 command.
Result Codes:
1048
OK
n = 0 or 1.
ERROR
Otherwise.
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3.5 W-CLASS COMMANDS
3.5.1 AT* Commands
*B - Display Blacklisted Numbers
This command requests the modem to return a list of blacklisted numbers to the DTE. The format of the response is shown
by the example below. Permanently forbidden numbers as defined by country requirements will not appear on this list. If no
numbers are blacklisted, only the OK result code is issued.
Example:
NO. - PHONE NUMBER ------ -----------------------------1;
2;
3;
4;
5;
4175537660
8288924961
3887278862
3124839442
6284664
OK
*D - Display Delayed Numbers
This command causes the modem to send a list of the delayed numbers together with the delay associated with each. The
modem will return a list of delayed telephone numbers as defined in the *B command. The format of the response is shown
by the example below (delay times are shown as hours:minutes:seconds). If no numbers are delayed, only the OK result
code is issued.
Example:
NO. - PHONE NUMBER -DELAY
------ ------------------------------------------1;
2;
3;
4;
5;
8264734660
7532634661
2587334662
7532651663
7459931664
2:00:00
2:00:00
0:02:00
0:03:25
0:01:45
OK
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*NCn - Country Select
Up to four sets of country parameters may be stored in the EPROM. This command checks to see if the entered number
matches the country code of one of the countries stored in the EPROM. If found, the modem stores the location of that
country in NVRAM. Upon power up or a soft reset (Z command), the modem uses this location to load the parameters for
the corresponding country. The default value of zero is used if no NVRAM is installed or the NVRAM failed self test during
reset.
Note: Automatic DAA country code recognition is enabled by the *NC0 command (the 0 country code is reserved for this
function). Automatic DAA country code recognition is disabled by the *NCn command selecting any other valid country code.
*NCn
Select country parameters corresponding to entered country code (n). The country codes are:
Country
Code (n)
Australia
40
Austria
Belgium
Bulgaria
27
Canada
20
China
41
Czech Republic
19
Denmark
Finland
France
Germany
Greece
17
Hong Kong
42
Hungary
23
India
30
Ireland
Israel
18
Italy
Japan
43
Korea
44
Luxembourg
Mexico
21
Netherlands
10
New Zealand
48
Norway
11
Philippines
43
Poland
24
Portugal
12
Russia
25
Singapore
47
Slovac Republic
26
Spain
13
Sweden
14
Switzerland
15
Taiwan
46
United Kingdom
16
United States
22
Result Codes:
1048
OK
If parameters corresponding to entered country code are present in EPROM.
ERROR
Otherwise.
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AT Command Reference Manual
3.6 CALLER ID COMMANDS
3.6.1 AT#CID Command
#CIDn - Caller ID
Enables or disables Caller ID.
#CID=0
Disables Caller ID. (Default.)
#CID=1
Enables Caller ID with formatted presentation to the DTE. The modem will present the data items
in a pair format. The expected pairs are data, time, caller code (telephone
number), and name.
#CID=2
Enables Caller ID with unformatted presentation to the DTE. The modem will present the entire
packet of information, excluding the leading U's, in ASCII printable hex numbers.
Result Codes:
OK
n = 0 or 2.
ERROR
Otherwise.
Inquiries
#CID?
Retrieves the current Caller ID mode from the modem.
#CID=?
Returns the mode capabilities of the modem in a list with each element separated by commas.
Formatted Form Reporting
The modem presents the data in the = pair format as described in the table below. Spaces are present on
both sides of the equal sign.
Tag
Description
DATE
DATE = MMDD where MM is the month number (01 to 12) and DD is the day number (01..31).
TIME
TIME = HHMM where HH is the hour number (00 to 23) and MM is the minute number (00 to
59).
NMBR
NMBR = or P or O where is the telephone number of the caller, where P
indicates that the calling number information is not available since the originating caller has
requested private service, and where O indicates that the calling number information is not
available or out of service at the calling location.
NAME
NAME = where is the subscription name.
MESG
MESG = in printable ASCII hex numbers.
This tag indicates a data item not listed above. The message is only possible for Multiple
Message Format.
Notes:
1.
The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.
2.
In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG
tag.
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Example of Formatted Form Reporting
1.
The following example illustrates the standard Caller ID message packet.
RING
DATE
TIME
NMBR
NAME
0321
1405
5045551234
A N OTHER
RING
RING
2.
The following example illustrates the case where the tag of the packet is not recognized by the modem.
RING
MESG
060342424231
RING
RING
Unformatted Form Reporting
The modem presents all information and packet control information found in the message. The modem, however, excludes
the leading U's (channel seizure information) from the presentation. The packet is presented in ASCII printable hex numbers,
the modem does not insert spaces, or line feeds, for formatting between bytes or words of the packet.
The modem does not detect the checksum of the packet.
Example of Unformatted Form Reporting
RING
0412303332323234303539313435353132333435
RING
RING
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3.7 CELLULAR COMMANDS
The Direct Connect Modem allows a direct interface to most cellular telephones eliminating the need for other intelligent
interfaces.
Landline modems operate with the telephone system by either going off hook detecting dialtone and the dialing the
telephone number using pulses or DTMF digits, or detecting the RING signal and answering the call. Intelligent cellular
phone interfaces connect between the modems RJ-11 socket and the cellular phone's data interface. The interface provides
landline features to the modem (line current, dial tone, ringing, etc.), and translates the modem's signals (off hook, DTMF
digits, etc.) into signals that the cellular phone understands. Once connected the interface acts as a transparent link between
the modem and the cellular telephone.
The Direct Connect Modem interfaces directly to the cellular phone's data interface and provides direct control over the
cellular phones operation. For example if the user were to instruct the modem to dial using the ATDTnnnn command the
modem would relay the telephone number and the SEND command to the cellular phone over the data interface.
The modem connects to the cellular phone using a special cable which must be purchased separately. A different cable is
required for each cellular phone or make of cellular phones. Below is a block diagram of a typical Direct Connect Cellular
Modem (based on AK14-X270 Rev 4 reference schematic).
3.7.1 Cellular Phone Drivers
The data interface to cellular phones differs between manufacturers and models and requires a unique cellular phone driver
for each phone or group of phones. Therefore the particular phone driver needs to be downloaded from the PC into the
modem's RAM before the modem can be used directly with the cellular phone. If a driver is not loaded the modem will
operate as a normal landline modem.
3.7.2 Cellular Commands
^C2 - Download Cellular Phone Driver
The ^C2 command initiates the cellular phone driver download function. Upon receipt of the command, the modem issues
the "OK" message. The user then performs an ASCII download of the driver (in .S37 format) from the host to the modem,
typically using a communications software package (with transmit pacing turned off).
^C2
Download Cellular Phone command
Result Codes:
OK
[Download Process]
OK
Cellular phone driver download completed successfully
ERROR
Cellular phone driver download not completed successfully, e.g., checksum of record (in S37 file)
is not correct, driver size is larger than 2k bytes, or an invalid driver is downloaded, or modem is
connected.
^I - Identify Cellular Phone Driver
The modem reports the identification of the loaded cellular phone driver in response to the ^I command. The response is
dependent upon the driver.
Result Codes (Typical):
CELLULAR DRIVER: OKI 900/910
(c) Copyright 1994, Spectrum Cellular, Inc.
Version 0.07 Thu Jan 10:29:52 1994
OK
or
ERROR
3-38
Cellular phone driver is not loaded
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^T6 - Indicate Status of Cellular Phone
The status of the cellular phone connected to the modem is reported in response to the ^T6 command. The status is
reported in a single byte formatted as a decimal number. The individual status signals assigned to the status byte bits are:
bit 0
1=
Cellular phone is receiving an incoming call
bit 1
1=
Cellular phone is in use
bit 2
1=
Cellular phone is locked (cannot be used)
bit 3
1=
There is no service for cellular phone (does not indicate signal strength)
bit 4
1=
Cellular phone is powered on
bit 5
1=
Cellular driver is initialized
bit 6
0=
Reserved (0)
bit 7
1=
Cellular cable detected
Result Codes (typical):
128
(Cellular cable detected)
OK
Application of ^T6 Status Byte
The information obtained by issuing a AT^T6 can be used to determine if the loading of the cellular phone driver is necessary
by the host software. A download is not necessary if landline (or no cable) is connected to the modem, in which ^T6 will
return a value of 0 (bit 7=0). A download is necessary when a cellular cable is detected (implied cellular phone is also
connected), in which ^T6 will return a value of 128 (bit 7=1). Once a driver is downloaded to the modem, it will be able to
operate in landline or cellular mode based on detection of a cellular cable.
3.7.3 Operation
Once the driver is loaded and the modem is connected to the cellular phone, and the phone is powered on dial/answer
functions will be routed through the phone instead of the landline DAA, i.e., no special commands are needed to place or
answer calls, the same AT commands and software packages that are used for landline communication sessions can be
used. If the cellular phone is not connected or is powered off dial/answer functions will be routed through the landline DAA,
and if V.42 bis connection is established the cellular phone driver will be purged so that the V.42 bis dictionaries can be
increased to their normal size.
While the modem is being used with a cellular phone it will respond with normal result messages with the following
differences in meaning:
NO DIALTONE
Indicates that cellular service is not currently available.
RING
Indicates that the cellular phone is receiving an incoming call.
Modem Configuration
Modem performance will be improved by modification of your standard configuration; it is recommended that the landline
modem also be EC compatible for reliable communications.
Cell Site
AT&F
Base Site
AT&F -SEC=1,18
MNP10-EC is automatically enabled on the cell side when a cellular phone driver is loaded and the modem firmware detects
that the cellular phone is attached, also in the V.34 products the modem is automatically configured to force the connection
in V.32bis mode.
On the cell side the transmit level is defined in the cellular driver, therefore it is not necessary to set the level using the ATSEC command.
In the V.34 products on the landline side if MNP10-EC is disabled (AT-SEC=0), it will automatically be enabled if another
V.34 modem is calling (V.8 bis/V.8 signal indicates cellular capability). No particular modulation will be chosen on the land
line side. Therefore if a landside V.34 modem is NOT going to receive any calls from a V.32bis MNP10-EC modem it can be
configured using AT&F -SEC=0,18 , otherwise use the configuration above.
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In V.34 modems if MNP10-EC is enabled manually (using AT-SEC=1) no particular modulation will be chosen, therefore if
the user wishes to force V.32bis modulation they should use the AT+MS=10,1,minspeed,maxspeed command (e.g.
AT+MS=10,1,4800,12000 would force V.32bis and limit the speed between 4800 and 12000 bps). To allow V.34 modulation
use AT+MS=11,1,minspeed,maxspeed (e.g. AT+MS=11,1,4800,19200 would allow V.34 speeds between 4800 and 19200).
When MNP10-EC is enabled in V.34 modes the symbol rate is limited to 3000, therefore the maximum speed would be
26.4K however the initial connect speed is limited to 21600.
If an AXCELL™ solution is used, a transmit level of -10dBm is required, therefore the following init string should be used:
Cell Site
AT &F -SEC=1,10
It is recommended that systems be set up if possible with separate modems to receive calls from other land based modems
and cellular modems. This is so that land based users that experience high network attenuation do not have connection
problems when communicating to modems configured for cellular operation.
The above configurations are the minimum additional AT commands may be issued to change the result messages etc,
AT&F is used to ensure that the modem is in a know state.
Table 3-2 summarizes the mode and resulting transmit levels for both modems depending on their configuration.
Fax Configuration
It is recommended that fax transmissions be configured to operate at 9600 bps in V.17 mode or 7200 bps in V.29 mode.
Cellular Phone Configuration
To achieve the best operational performance, a cellular data connection should be attempted in a location where adequate
signal strength is observed for the cellular phone. This condition can be easily monitored on some phones with signal
strength indicator. In locations where even voice calls are unreliable, data connections should not be attempted. Under some
circumstances a special high gain antenna may improve performance.
Additional information regarding the use of the cellular phone and cellular network should be obtained from the service
provider and or cellular phone manufacturer.
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Table 3-2. Remote Modem Configuration and Resulting Transmit Levels
Remote Modem
Configuration
V.34
Direct
Connect
AT&F
AT&F-SEC=1,x
V.32bis
Direct
Connect
AT&F
AT&F-SEC=1,x
V.34
PSTN
AT&F
V.32bis
PSTN
AT&F
Base Site Configuration
(Connected to PSTN)
AT&F-SEC=0,x
V.34
V.32bis
Mod = V.32bis
Mod = V.32bis
Mode = -EC
Mode = Single -EC
RTxlv = Driver
RTxlv = Driver
BTxlv = x
BTxlv = -10
Mod = V.34
Mod = V.32bis
Mode = -EC
Mode = Single -EC
RTxlv = x
RTxlv = x
BTxlv = x
BTxlv = -10
Mod = V.32bis
Mod = V.32bis
Mode = Single -EC Mode = Single -EC
RTxlv = Driver
RTxlv = Driver
BTxlv = -10
BTxlv = -10
Mod = V.32bis
Mod = V.32bis
Mode = Single -EC Mode = Single -EC
RTxlv = x
RTxlv = x
BTxlv = -10
BTxlv = -10
Mod = V.34
Mod = V.32bis
Mode = non -EC
Mode = non -EC
RTxlv = -10
RTxlv = -10
BTxlv = -10
BTxlv = -10
Mod = V.32bis
Mod = V.32bis
Mode = non -EC
Mode = non -EC
RTxlv = -10
RTxlv = -10
BTxlv = -10
BTxlv = -10
AT&F-SEC=1,x
V.34
V.32bis
Mod = V.32bis
Mod = V.32bis
Mode = -EC
Mode = -EC
RTxlv = Driver
RTxlv = Driver
BTxlv = x
BTxlv = x
Mod = V.34
Mod = V.32bis
Mode = -EC
Mode = -EC
RTxlv = x
RTxlv = x
BTxlv = x
BTxlv = x
Mod = V.32bis
Mod = V.32bis
Mode = -EC
Mode = -EC
RTxlv = Driver
RTxlv = Driver
BTxlv = x
BTxlv = x
Mod = V.32bis
Mod = V.32bis
Mode = -EC
Mode = -EC
RTxlv = x
RTxlv = x
BTxlv = x
BTxlv = x
Mod = V.34
Mod = V.32bis
Mode = Single -EC Mode = Single -EC
RTxlv = -10
RTxlv = -10
BTxlv = x
BTxlv = x
Mod = V.32bis
Mod = V.32bis
Mode = Single -EC Mode = Single -EC
RTxlv = -10
RTxlv = -10
BTxlv = x
BTxlv = x
Key:
Mod = Modulation negotiated (V.32bis or V.34)
Mode = -EC = Both ends in MNP10-EC mode
Single -EC = one end in MNP10-EC mode
non -EC = neither end in MNP10-EC mode
RTxlv = Transmit level of Remote side modem in dBm
BTxlv = Transmit level of Base side modem in dBm
x=
User defined transmit level
Driver = Transmit level defined in cellular phone driver.
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3.8 AT COMMAND RESULT CODES
The modem responds to commands from the DTE and to activity on the line by signalling to the DTE in the form of result
codes. The result codes that the modem can send are described below.
Two forms of each result code are available: long-form, an English-like "verbose" response, and short-form, a data-like
numeric response (included in parentheses following the long-form). The long-form code is preceded and terminated by the
sequence < CR> < LF>. The short-form is terminated by < CR>, only with no preceding sequence.
If result messages are suppressed, nothing is returned to the DTE. The long-form results codes can be modified by the OEM
through the ConfigurACE Configuration Utility Program. (See ConfigurACE description.)
OK (0)
The OK code is returned by the modem to acknowledge execution of a command line.
CONNECT (1)
The modem will send this result code upon connecting when:
1.
The line speed is 300 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 300 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting, or
3.
The range of result code responses is restricted by the X command such that no speed reporting is allowed.
RING (2)
The modem sends this result code when incoming ringing is detected on the line. What qualifies as a ring signal is
determined by country-dependent parameters, modifiable through ConfigurACE.
When cellular interface is selected, RING indicates that the cellular phone is receiving an incoming call.
NO CARRIER (3)
The modem sends this result code when attempting to establish a call if:
1.
Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or
2.
No ringback is detected within the period of time determined by register S7.
This result code is also used when the modem auto-disconnects due to loss of carrier.
Under X0, if busy tone detection is enforced, this result code is used as a response to the detection of busy or circuit busy.
Under X0, if dial tone detection is enforced or selected, this result code is used to indicate that dial tone has not been
detected.
ERROR (4)
The modem returns this result code if the command line contains a syntax error or it is unable to execute a command
contained in the command line. It is issued if a command does not exist or if the parameter supplied is outside the permitted
range.
Under X0, X1, X2, and X3, this result is used instead of DELAYED and BLACKLISTED.
CONNECT 1200 (5)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 1200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 1200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
(Also, see the W command.)
NO DIALTONE (6)
For X2 and X4, the modem sends this result code if it has been instructed to wait for dial tone during dialing but none is
received.
When cellular phone interface is selected, NO DIALTONE indicates that cellular service is not currently available.
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BUSY (7)
For X3 and X4, if busy tone detection is enforced, the modem sends this result code when attempting to originate a call if the
busy (engaged) signal is detected on the line.
NO ANSWER (8)
The modem sends this result code when attempting to originate a call if a continuous ringback signal is detected on the line
until the expiration of the timer S7.
CONNECT 0600 (9)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 2400 (10)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 2400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 2400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 4800 (11)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 4800 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 4800 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 9600 (12)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 9600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 9600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 7200 (13)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 7200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
2.
The DTE speed is 7200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 12000 (14)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 12000 bps and the modem has been instructed to report the line speed to the DTE upon connecting,
or
2.
The DTE speed is 12000 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 14400 (15)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 14400 bps and the modem has been instructed to report the line speed to the DTE upon connecting,
or
2.
The DTE speed is 14400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 19200 (16)
For X1, X2, X3, and X4, the modem sends this result code when:
1.
The line speed is 19200 bps and the modem has been instructed to report the line speed to the DTE upon connecting,
or
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2.
The DTE speed is 19200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 38400 (17)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 38400 bps and the
modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 57600 (18)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 57600 bps and the
modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 115200 (19)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 115200 bps and the
modem has been instructed to report the DTE speed to the DTE upon connecting.
CONNECT 75TX/1200RX (22)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 originate connection when the modem
has been instructed to report the DCE speed upon connection.
CONNECT 1200TX/75RX (23)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 answer connection when the modem
has been instructed to report the DCE speed upon connection.
DELAYED (24)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'delayed' due to
country blacklisting requirements.
BLACKLISTED (32)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'blacklisted'.
FAX (33)
The modem returns this result code when a fax modem connection is established in a facsimile mode.
DATA (35)
The modem returns this result code when a data modem connection is established in a facsimile mode.
CARRIER 300 (40)
The modem returns this result code when a 0-300 bps data rate has been detected on the line and carrier reporting has
been enabled. (See S95 and Xn.)
CARRIER 1200/75 (44)
The modem sends this result code when the V.23 backward channel carrier has been detected on the line and carrier
reporting has been enabled. (See S95 and Xn.)
CARRIER 75/1200 (45)
The modem sends this result code when the V.23 forward channel carrier has been detected on the line and carrier reporting
has been enabled. (See S95 and Xn.)
CARRIER 1200 (46)
The modem sends this result code when a 1200 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 2400 (47)
The modem sends this result code when a 2400 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 4800 (48)
The modem sends this result code when a 4800 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
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CARRIER 7200 (49)
The modem sends this result code when a 7200 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 9600 (50)
The modem sends this result code when a 9600 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 12000 (51)
The modem sends this result code when a 12000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 14400 (52)
The modem sends this result code when a 14400 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 16800 (53)
The modem sends this result code when a 16800 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 19200 (54)
The modem sends this result code when a 19200 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 21600 (55)
The modem sends this result code when a 21600 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 24000 (56)
The modem sends this result code when a 24000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 26400 (57)
The modem sends this result code when a 26400 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 28800 (58)
The modem sends this result code when a 28800 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CONNECT 16800 (59)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 16800 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 21600 (61)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 21600 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 24000 (62)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 24000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 26400 (63)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 26400 bps and the
modem has been instructed to report the DTE speed upon connecting.
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CONNECT 28800 (64)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 28800 bps and the
modem has been instructed to report the DTE speed upon connecting.
COMPRESSION: CLASS 5 (66)
This message is sent to the DTE when the modem has connected in MNP Class 5 and COMPRESSION message reporting
has been enabled. (See S95 and Xn.)
COMPRESSION: V.42 bis (67)
This message is sent to the DTE when the modem has connected in V.42 bis and COMPRESSION message reporting has
been enabled. (See S95 and Xn.)
COMPRESSION: NONE (69)
This message is sent to the DTE when the modem has connected without data compression and COMPRESSION message
reporting has been enabled. (See S95 and Xn.)
PROTOCOL: NONE (70)
This message is sent to the DTE when the modem has connected without any form of error correction, and the PROTOCOL
message reporting has been enabled. (See S95 and Xn.)
PROTOCOL: LAPM (77)
This message is sent to the DTE when the modem has connected in the V.42 LAPM mode of error correction, and
PROTOCOL message reporting has been enabled. (See S95 and Xn.)
CARRIER 31200 (78)
The modem sends this result code when a 31200 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 33600 (79)
The modem sends this result code when a 33600 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
PROTOCOL: ALT (80)
This message is sent to the DTE when the modem has connected in the MNP mode of error correction, and PROTOCOL
message reporting has been enabled. (See S95 and Xn.)
PROTOCOL: ALT-CELLULAR (81)
This message is sent to the DTE when the modem has connected in the MNP 10 mode and cellular power level adjustment
is enabled (")M1 or )M2").(See S95 and Xn.)
CONNECT 33600 (84)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 33600 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 31200 (91)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 31200 bps and the
modem has been instructed to report the DTE speed upon connecting.
CARRIER 32000 (150)
The modem sends this result code when a 32000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 34000 (151)
The modem sends this result code when a 34000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
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CARRIER 36000 (152)
The modem sends this result code when a 36000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 38000 (153)
The modem sends this result code when a 38000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 40000 (154)
The modem sends this result code when a 40000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 42000 (155)
The modem sends this result code when a 42000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 44000 (156)
The modem sends this result code when a 44000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 46000 (157)
The modem sends this result code when a 46000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 48000 (158)
The modem sends this result code when a 48000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 50000 (159)
The modem sends this result code when a 50000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 52000 (160)
The modem sends this result code when a 52000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 54000 (161)
The modem sends this result code when a 54000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CARRIER 56000 (162)
The modem sends this result code when a 56000 bps data rate has been detected on the line and carrier reporting has been
enabled. (See S95 and Xn.)
CONNECT 32000 (165)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 32000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 34000 (166)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 34000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 36000 (167)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 36000 bps and the
modem has been instructed to report the DTE speed upon connecting.
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CONNECT 38000 (168)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 38000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 40000 (169)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 40000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 42000 (170)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 42000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 44000 (171)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 44000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 46000 (172)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 46000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 48000 (173)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 48000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 50000 (174)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 50000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 52000 (175)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 52000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 54000 (176)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 54000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 56000 (177)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 56000 bps and the
modem has been instructed to report the DTE speed upon connecting.
CONNECT 230400 (20)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 230400 bps and the
modem has been instructed to report the DTE speed upon connecting.
+FCERROR (+F4)
This message is sent to the DTE when high speed fax data (V.27, V.29, V.33, or V.17) is expected and a V.21 signal is
received.
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3.9 AUDIOSPAN AND DSVD COMMANDS
AudioSpan and DSVD are two technologies that allow simultaneous voice and data operation using a Rockwell modem
connected to a telephone line. AudioSpan and DSVD implementations differ in the manner that voice and modem data are
combined. Voice and data channels are combined in the analog domain for AudioSpan and in the digital domain for DSVD.
Establishing a AudioSpan or DSVD connection is analogous to establishing a regular data modem connection. Initiate the
call using normal dialing (ATD) and answering (ATA) procedures. The modem can switch from a regular phone conversation
into AudioSpan or DSVD mode and back to phone conversation. A handset, headset, or microphone/speaker can be used
for voice communication during AudioSpan or DSVD mode.
AudioSpan operates in normal (non-error corrected) or error-corrected/compression mode (MNP 5 or V.42 bis depending on
the error correction settings of the modems). The DTE rate must be equal to or greater than the anticipated DCE connection
speed. In general, DTE speed of 38400 bps or higher should be used.
3.9.1 Commands Supported by Both AudioSpan and DSVD
-SMS= x, y, z, t - Select AudioSpan/DSVD Mode
The x parameter selects Data, AudioSpan, or DSVD mode, or enables automatic mode selection. The y, z, t parameters are
optional and are required only if the user wishes to control connection speeds. For example, AT-SMS=2 is sufficient to
enable SVD.
x: AudioSpan/DSVD/Data mode select and automatic mode select enable
0=
Data mode
1=
DSVD mode
(A modem not supporting DSVD will respond with ERROR)
2=
AudioSpan mode
(A modem not supporting AudioSpan will respond with ERROR)
3=
Automatic mode select
(DSVD/AudioSpan/Data) (Default)
Note: AT-SMS=1 performs the same operation at AT-SSE=1.
y: Minimum data speed (bps) with audio for AudioSpan mode (see y value in following table)
z: Maximum data speed (bps) with audio for AudioSpan mode (see z value in following table)
Modulation Selected (See -SQS Command)
y or z Value
V.61
ML144
ML288
4800
S ( y and z Default)
S (y Default)
S (y Default)
7200
—
9600
—
S (z Default)
12000
—
—
14400
—
—
S (z Default)
S = Supported.
— = Not supported.
t: Symbol rate (ML288 modulation only)
0=
Auto Selection
1-6=
Reserved
(Default)
The symbol rate must be set to 0 for for normal operation (default). The other symbol rate selections are for test
purposes only.
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Notes
AudioSpan audio quality is dependent upon modulation mode, data rate and telephone line quality. Some guidelines are:
1.
Higher quality telephone lines provide better audio quality than impaired telephone lines.
2.
A lower data speed with audio provides better audio quality than higher data speed with audio. For example, a
ML288/9600 connection will be audibly superior to a ML288/14400 connection.
3.
For identical data speed with audio using different modulations (e.g., ML144 vs. ML288), the audio quality at ML288 will
be superior. For example, a ML288/9600 will be audibly superior to a ML144/9600 connection.
Examples
1. AT -SMS=2 selects AudioSpan Mode (the y, z, and t parameters are not required).
2.
AT -SMS=2,4800,9600 selects AudioSpan Mode, specifies the minimum data speed with audio of 4800 bps, and
specifies the maximum data speed with audio of 9600 bps.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SMS?
The response is:
, ,< t>
Example:
-SMS?
2,1
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SMS=?
The response is:
(list of values),(list of values),(list of values),(list of values)
Example:
-SMS=?
(0,1,2,3),(4800-14400),(4800-14400),(0,1,2,3,4,5,6)
#VLS = x - Voice Line Select
0=
Telephone handset
5=
Headset
6=
Speakerphone
(Default)
The AT#VLS setting must be issued prior to establishing a DSVD or AudioSpan connection if a voice line other than the
default telephone handset is desired.
3.9.2 Commands Supported Only by DSVD
-SSE= x - Enable/Disable DSVD
0=
Disable DSVD
(Default)
1=
Enable DSVD
(A modem not supporting DSVD will respond with ERROR)
Note: DSVD mode can be enabled by either AT-SSE=1 or AT-SMS=1, and disabled by either AT-SSE=0 or AT-SMS=0.
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3.9.3 Commands Supported Only by AudioSpan
The following commands are applicable only for modems supporting AudioSpan mode. The command has no effect in DSVD
mode. Modems that supports DSVD but not AudioSpan will report ERROR in response to these commands.
-SQS= x, y - Select AudioSpan Modulation
x: Select modulation mode
0=
V.61
1=
ML144
(Default for RCV144)
2=
ML288
(Default for RCV288)
y: Enable/disable AudioSpan automatic modulation (automode) selection (V.61, ML144, ML288)
0=
Disable AudioSpan automodulation Host selects AudioSpan modulation specified by the x parameter.
If the selected modulation is not supported by the modem,
ERROR is reported and the x parameter is not changed. If the
remote modem does not support the selected modulation, the
modem disconnects.
1=
Enable AudioSpan automodulation The modem starts with the AudioSpan modulation specified by the
x parameter and falls back from ML288, to ML144, to V.61, or to
data mode (e.g., V.34 or v.32 bis) depending on the selected x
parameter, the remote modem capability, and line conditions.
(Default.)
Notes
1. The AT-SQS parameters should remain at default unless a particular modulation is preferred.
2.
For identical data speed with audio using different modulations (e.g., ML144 vs. ML288), the audio quality at ML288 will
be superior. For example, a ML288/9600 will be audibly superior to a ML144/9600 connection.
Examples
1. AT -SQS=2,1 enables AudioSpan automodulation starting with ML288 modulation.
2.
AT -SQS=2,0 disables AudioSpan automodulation and selects ML288 modulation.
3.
AT -SQS=1,0 disables AudioSpan automodulation and selects ML144 modulation.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SQS?
The response is:
,
Example:
-SQS?
2,1
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SQS=?
The response is:
(list of values), (list of values)
Example:
-SQS=?
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(0,1,2),(0,1)
-SMC= x - Enable/Disable ML144 Data Burst
0=
Disable data burst
1=
Enable data burst
(Default)
ML144 data burst can be enabled using the -SMC command in ML144 modulation. Data burst will keep the audio channel
open only when energy is detected on the handset or headset. When silence is detected in data burst mode, the connected
modems will upshift in speed for higher throughput. Disabling data burst mode will keep the audio channel open at all times
during the AudioSpan connection.
Reporting Selected Options
The modem reports the selected options in response to the following command:
-SMC?
The response is:
Example:
-SMC?
Reporting Supported Options
The modem reports the supported options in response to the following command:
-SMC=?
The response is:
(list of values)
Example:
-SMC=?
(0,1)
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3.9.4 Examples
Example 1: Establish a AudioSpan data connection between two RCV288 modems and use handset as audio interface.
Both DTEs are set at 57600 bps:
DTE
Originate Modem
DCE
AT&F
DTE
AT&F
OK
AT-SMS=2
Answer Modem
DCE
Comments
Reset modems.
OK
AT-SMS=2
OK
Enable AudioSpan with default
settings.
OK
ATDTxxxx
Originate modem dials remote
modem.
RING
ATA
CONNECT 57600
CONNECT 57600
+++
Answer DTE responds to RING
by answering.
AudioSpan is established and
users can pick up handsets to
converse. The connect message
represents the DTE speed on
each side.
Modems exchange data.
Users hang up handsets to
terminate audio link.
Originate modem enters
command mode to prepare for
disconnect.
OK
ATH
NO CARRIER
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NO CARRIER
Modems disconnect.
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Example 2: Switch from normal handset conversation to AudioSpan data connection between two RCV288 modems. The
originate DTE is set to 57600 bps and the answer DTE is set to 115200 bps:
DTE
Originate Modem
DCE
AT&F
DTE
Answer Modem
DCE
AT&F
OK
AT-SMS=2
OK
AT-SMS=2
OK
Enable AudioSpan with default
settings. Modems are aware
handsets are already being used
due to line current sensing.
OK
ATD
RING
ATA
CONNECT 57600
Comments
Users establish handset
conversation and both handsets
are off-hook.
Reset modems.
CONNECT 115200
+++
Originate modem initiates data
negotiation but will not actually
dial since the handset is already
offhook.
Answer modem detects
negotiation sequence and reports
RING message to DTE.
DTE responds to RING by
answering.
AudioSpan is established and
user’s can resume conversation.
The connect message represents
the DTE speed on each side.
Modems exchange data.
Answer modem enters command
mode to prepare for disconnect.
OK
ATH
NO CARRIER
NO CARRIER
Modems disconnect in AudioSpan
mode but handsets are still
offhook and conversation can
continue. Conversation is
terminated when both handsets
are hung up.
Note: The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
during the negotiation period.
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Example 3: Switch from normal handset conversation to AudioSpan data connection between two RCV288 modems in
normal (non-error corrected) mode. Headset operation will be selected on the originate modem and speakerphone operation
will be selected on the answer modem as the audio interface during AudioSpan connection. The originate DTE prefers a
ML288/14400 connection for good audio quality and does not require high throughput. Both DTEs are set at 57600 bps:
DTE
Originate Modem
DCE
AT&F\N0
DTE
Answer Modem
DCE
AT&F
OK
AT#VLS=5
OK
AT#VLS=6
OK
AT-SMS= 2,
14400 ,14400
Handset mode selected for
originate mode. Speakerphone
mode selected for answer
modem.
OK
AT-SMS=2
OK
Enable AudioSpan. Originate DTE
wishes to force a ML288/14400
with audio connection.
OK
ATD
RING
ATA
CONNECT 57600
Comments
User’s establish handset
conversation and both handsets
are off-hook.
Reset modems. Normal mode
operation is selected by originate
DTE.
CONNECT 57600
+++
Originate modem initiates data
negotiation but will not actually
dial since the handset is already
offhook.
Answer modem detects
negotiation sequence and reports
RING message to DTE.
DTE responds to RING by
answering.
AudioSpan is established and
user’s can resume conversation.
The connect message represents
the DTE speed on each side.
Modems exchange data.
Answer modem enters command
mode to prepare for disconnect.
OK
ATH
NO CARRIER
NO CARRIER
Modems disconnect in AudioSpan
mode but handsets are still
offhook and conversation can
continue. Conversation is
terminated when both handsets
are hung up.
Note: The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
during the negotiation period.
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Example 4: Establish a ML144/7200 data connection between two RCV288 modems in headset mode, then switch to
handset later in the session so conversation can continue after modem call is hung up. This may be typical for configuring an
interactive gaming software. Both DTEs are set at 38400 bps:
DTE
Originate Modem
DCE
AT&F
DTE
AT&F
OK
Answer Modem
DCE
Comments
Reset modems.
OK
AT-SQS=1
Select ML144 AudioSpan
modulation.
OK
AT-SMS=2,
7200,7200
AT-SMS=2,
7200,7200
OK
AT#VLS=5
Enable AudioSpan with both
DTEs choosing ML144/7200 with
audio as the connection.
OK
AT#VLS=5
OK
OK
ATDTxxxx
Originate modem dials remote
modem.
RING
ATA
CONNECT 38400
CONNECT 38400
+++
DTE responds to RING by
answering.
AudioSpan is established and
headsets are used for
conversation.
Send data betweeen modems.
Users can pick up handsets to
automatically swtich to handset
modes during AudioSpan. A
conversation can continue even if
one user picks up the handset. In
this example, both users will pick
up the handset.
Originate modem enters
command mode to prepare for
disconnect.
OK
ATH
NO CARRIER
3-56
NO CARRIER
Modems disconnect in AudioSpan
mode but handsets are still
offhook and conversation can
continue. Conversation is
terminated when both handsets
are hung up.
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Example 5: Originate modem places speakerphone call to remote handset which is connected to the answer modem. The
originate modem switches from speakerphone mode to establish a AudioSpan/Speakerphone data connection between two
RCV288 modems. The originate DTE is set to 57600 bps and the answer DTE is set to 115200 bps:
Originate Modem
DTE
DCE
AT&F#CLS=8
#VLS=6#VRN=0
Answer Modem
DTE
DCE
AT&F-SMS=2
#VLS=6
OK
OK
RING
ATDT5551212
Comments
Modems are reset. Originate
modem is configured for
speakerphone call. Answer
modem is configured for
AudioSpan speakerphone call.
Answer modem is called but user
picks up handset to establish
conversation.
VCON
AT#CLS=0
Originate modem switches to data
mode. Audio on both sides will be
muted while the originate modem
is in #CLS=0.
OK
AT-SMS=2
#VLS=6
Modem is configured for
AudioSpan with speakerphone
mode selected.
OK
ATD
RING
ATA
CONNECT 57600
CONNECT 115200
+++
Originate modem initiates data
negotiation but will not actually
dial since the handset is already
offhook.
Answer modem detects
negotiation sequence and reports
RING message to DTE.
DTE responds to RING by
answering.
AudioSpan is established and
users can resume conversation
on speakerphone. The connect
message represents the DTE
speed on each side.
Modems exchange data.
Answer modem enters command
mode to prepare for disconnect.
OK
ATH
NO CARRIER
NO CARRIER
Modems disconnect in AudioSpan
mode and speakerphone
conversation is terminated.
Note: The transition from handset conversation to AudioSpan mode can take up to 8 seconds. The handsets will be silenced
during the negotiation period.
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3.10 SYNCHRONOUS ACCESS MODE
3.10.1 Synchronous Access Mode Commands
Three commands support Synchronous Access Mode:
+ES
Enables and disables Synchronous Access Mode in the client or central site modem
+ESA
Configures the operation of the Synchronous Access Submode
+ ITF
Selects Transmit Flow Control Thresholds
Enabling Synchronous Access Mode enables the use of the 8-bit command characters defined in Table 9/V.80 of the Draft
ITU-T Recommendation V.80 (DATA COMMUNICATION OVER THE TELEPHONE NETWORK; In-Band DCE Control and
Synchronous Data Modes for Asynchronous DTE).
+ES - Enable Synchronous Access Mode
This extended-format command specifies the initial requested mode of operation when the modem is operating as the
originator, optionally specifies the acceptable fallback mode of operation when the modem is operating as the originator, and
optionally specifies the acceptable fallback mode of operation when the modem is operating as the answerer. The command
format is:
+ES=[[,[,]]]
This extended-format compound parameter is used to control the manner of operation of the V.42 protocol in the modem (if
present). It accepts three numeric subparameters:
Specifies the initial requested mode of operation when the modem is operating as the originator.
The options are:
Initiate V.42 with Detection Phase. (Default.)
Initiate Synchronous Access Mode when connection is completed, and Data State is
entered.
Initiate Frame Tunneling Mode when connection is completed, and Data State is entered.
Specifies the acceptable fallback mode of operation when the modem is operating as the
originator. This subparameter should not be commanded.
Specifies the acceptable fallback mode of operation when the modem is operating as the
answerer. The options are:
Error control optional (either LAPM or Alternative acceptable); if error control not
established, maintain DTE-modem data rate and use local buffering and flow control
during non-error-control operation. (Default.)
Initiate Synchronous Access Mode when connection is completed, and Data State is
entered.
Initiate Frame Tunneling Mode when connection is completed, and Data State is entered.
Examples:
3-58
+ES=6
Enable Synchronous Access Mode originator (client modem only)
+ES=,,8
Enable Synchronous Access Mode answerer (client modem only)
+ES=6,,8
Enable Synchronous Access Mode originator and answerer (client modem only)
+ES=7
Enable Frame Tunneling Mode originator (central site modem only)
+ES=,,9
Enable Frame Tunneling Mode answerer (central site modem only)
+ES=7,,9
Enable Frame Tunneling Mode originator and answerer (central site modem only)
+ES=3
Disable Synchronous Access Mode originator
+ES=,,2
Disable Synchronous Access Mode answerer
+ES=3,,2
Disable Synchronous Access Mode originator and answerer
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AT Command Reference Manual
Reporting Selected Options
The modem reports the selected options in response to the following command:
+ES?
The response is:
+ES: ,,
Example:
+ES?
+ES: 3,0,2
For the defaults.
+ES: 6,0,8
Synchronous Access Mode originator and answerer enabled (client modem only)
+ES: 7,0,9
Frame Tunneling Mode originator and answerer enabled (central site modem only)
Reporting Supported Options
The modem reports the supported options in response to the following command:
+ES=?
The response is:
+ES: (list of supported values),(list of supported values),(list of supported values)
For example:
+ES=?
+ES: (0-7),(0-4),(0-9)
+ESA - Configure Synchronous Access Submode
The operation of the Synchronous Access sub-Mode is configured by the +ESA parameter. The command format is:
+ESA=[[,[,[,[,[,[,[,]]]]]]]]
This extended-format compound parameter is used to control the manner of operation of the Synchronous Access Mode in
the modem. It accepts six numeric subparameters:
Specifies the bit sequence transmitted by the modem when a transmit data buffer underrun
condition occurs, while operating in Transparent sub-Mode. The options are:
In Transparent sub-Mode, modem transmits 8-bit SYN sequence on idle. Modem
receiver does not hunt for synchronization sequence (default and fixed).
Specifies the bit sequence transmitted by the modem when a transmit data buffer underrun
condition occurs immediately after a flag, while operating in Framed sub-Mode. The options are:
In Framed sub-Mode, modem transmits HDLC flags on idle (default and fixed).
Specifies the actions undertaken by the modem when a transmit data buffer underrun or overrun
condition occurs immediately after a non-flag octet, while operating in Framed sub-Mode.
1048
In Framed sub-Mode, modem transmits abort on underrun in middle of frame (default).
In Framed sub-Mode, DCE transmits a flag on underrun in middle of frame, and notifies
DTE of underrun or overrun.
Specifies whether or not, in V.34 half-duplex operation, additional procedures besides those
specified in § 12/V.34 shall be performed by the modem when switching from primary channel to
secondary channel operation, and vice versa. This subparameter should not be commanded.
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Specifies the CRC polynomial used while operating in Framed sub-Mode. The options are:
CRC generation and checking disabled (default).
In Framed sub-Mode, the 16-bit CRC is generated by the modem in the transmit
direction, and checked by the modem in the receive direction.
Specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the modem for
transmit and receive data. The options are:
NZRI encoding and decoding disabled (default and fixed).
, Specifies the octet value(s) to be used while performing character-oriented framing. is to
be commanded to 255 (FFh); is not to be commanded.
Reporting Selected Options
The modem reports the selected options in response to the following command:
+ESA?
The response is:
+ESA: ,,,,,,,
Example:
+ESA?
+ESA: 0,0,0, ,0,0,255,
For the defaults.
Reporting Supported Options
The modem reports the supported options in response to the following command:
+ESA=?
The response is:
+ESA: (list of supported values), (list of supported values),
(list of supported values), (list of supported values),
(list of supported values), (list of supported values),
(list of supported values), (list of supported values)
Example:
+ESA=?
+ESA: (0),(0),(0-1), ,(0-1),(0),(255),
3-60
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AT Command Reference Manual
+ ITF - Transmit Flow Control Thresholds
The +ITF command determines the flow control thresholds used by the modem for transmit data from the DTE. The
command format is:
+ITF=[[,[,]]]
This optional compound parameter allows the DTE to determine the input buffer size in the modem for data on circuit 103
(transmit data) from the DTE, to control the threshholds used for flow control of such data, and to control how often the
modem reports to the DTE the number of octets in this buffer. Note that the DTE can adjust its own threshholds for flow
control of data on circuit 104 (received data) from the modem.
Determines the threshhold, in octets, above which the modem will generate a flow off signal.
Applicable in Synchronous Access and Frame Tunneling modes. Default value is 255.
For the and subparameters, the input buffer is assumed to reside between the
modem’s V.24 interface and the Synchronous Access protocol layer; i.e., the buffer count
includes all octets, including EM codes, received from the DTE, with the exception of DC1 and
DC3 if these are used to signal flow control.
The modem returns the ERROR result code if the DTE specifies that the subparameter be
set to a value less than or equal to the subparameter; in this case, the current parameter
value settings are not modified.
Determines the threshhold, in octets, below which the modem will generate a flow on signal.
Applicable in Synchronous Access and Frame Tunneling modes. Default value is 64.
Not supported. A fixed value of zero is used and reported.
Reporting Selected Options
The modem sends a string of information text to the DTE consisting of selected options in response to the following
command:
+ITF?
The response is:
+ITF: ,,
Example:
+ITF?
+ITF: 255,64,0
Default values
Reporting Supported Options
The modem sends a string of information text to the DTE consisting of supported options in response to the following
command:
+ITF=?
The response is:
+ITF: (list of supported values),(list of supported values),(list of supported values)
Example:
+ITF=?
+ITF: (0-255),( 0-255),(0)
The maximum reported value is the input transmit data buffer level at which the modem signals a transmit data
overrun indication to the DTE.
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AT Command Reference Manual
4. S-REGISTERS
The S-Registers are summarized in Table 4-1 along with their default values; registers denoted with an '*' may be stored in
one of the two user profiles by entering the &Wn command. One of these profiles may be loaded at any time by using the Zn
command. Registers or register fields quoted as “reserved” are reserved for current or future use by the firmware, or are
permanently overridden by PTT limitations. For the latter, control of the equivalent functionality is available with ConfigurACE
Call Progress and Blacklisting options.
All bit-mapped registers are read-only. The appropriate AT command which controls the relevant bits in the S-Register
should be used to change the value.
4.1 FACTORY DEFAULTS
The factory default values are stored in ROM and are loaded into the active configuration at power up or by the ATZn
command. In addition, the designated default profile is subsequently loaded, and may change some of the factory default
values. The designated default profile can be changed by entering the &Yn command where n is one of the two possible
user profiles.
The defaults shown are those used by Rockwell in factory profiles zero and one. These may be overwritten by the OEM with
ConfigurACE prior to placing the firmware in PROM. Minimum and maximum values may also be imposed by ConfigurACE
in response to country PTT requirements.
The default values shown in Table 4-1 may vary by modem firmware configuration. Consult the MCU firmware release notes
for exact configuration.
The factory default values may be loaded at any time by entering the &Fn command.
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AT Command Reference Manual
Table 4-1. S-Register Summary
Register
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34-S35
S36
S37
S38
S39
4-2
Function
Rings to Auto-Answer
Ring Counter
Escape Character
Carriage Return Character
Line Feed Character
Backspace Character
Wait Time for Dial Tone
Wait Time for Carrier
Pause Time for Dial Delay Modifier
Carrier Detect Response Time
Carrier Loss Disconnect Time
DTMF Tone Duration
Escape Prompt Delay
Reserved
General Bit Mapped Options Status
Reserved
Test Mode Bit Mapped Options
Status (&T)
Reserved
Test Timer
AutoSync Options
AutoSync HDLC Address or BSC
Sync Character
V.24/General Bit Mapped Options
Status
Speaker/Results Bit Mapped Options
Status
General Bit Mapped Options Status
Sleep Inactivity Timer
Delay to DTR Off
RTS-to-CTS Delay
General Bit Mapped Options Status
General Bit-Mapped Options Status
Flash Dial Modifier Time
Disconnect Inactivity Timer
General Bit-Mapped Options Status
XON Character
XOFF Character
Reserved
LAPM Failure Control
Line Connection Speed
Delay Before Forced Hangup
Flow Control Bit Mapped Options
Status
Range
0-255
0-255
0-255
0-127
0-127
0-255
2-255
1-255
0-255
1-255
1-255
50-255
0-255
Units
rings
rings
ASCII
ASCII
ASCII
ASCII
0.1 s
0.1 s
0.001 s
0.02 s
0-255
0-255
Saved
Default**
43
13
10
50
14
95
50
138 (8Ah)
52 (34h)
117 (75h)
0-255
0-255
0-255
0-255
0-255
0-255
0-255
0-255
s or 0.01 s
0.01 s
10 ms
10 s
ASCII
ASCII
62 (3Dh)
73 (49h)
70
194 (C2h)
17 (11h)
19 (13h)
20
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AT Command Reference Manual
Table 4-1. S-Register Summary (Cont’d)
Register
Function
Range
Units
Saved
S40
General Bit-Mapped Options Status
S41
General Bit-Mapped Options Status
S42-S45
Reserved
S46
Data Compression Control
S48
V.42 Negotiation Control
S82
LAPM Break Control
S86
Call Failure Reason Code
0-255
S91
PSTN Transmit Attenuation Level
0-15
dBm
S92
Fax Transmit Attenuation Level
0-15
dBm
S95
Result Code Messages Control
* Register value may be stored in one of two user profiles with the &W command.
** Default values may be modified using ConfigurACE.
1048
Default**
104 (68h)
195 (C3h)
138
128(40h)
10 (Country dependent)
10 (Country dependent)
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AT Command Reference Manual
4.2 S-REGISTER DEFINITIONS
S0 - Number of Rings to Auto-Answer
Sets the number of the rings required before the modem automatically answers a call. Setting this register to zero disables
auto-answer mode.
Range:
0-255 rings
Default: 0
S1 - Ring Counter
S1 is incremented each time the modem detects a ring signal on the telephone line. S1 is cleared if no rings occur over an
eight second interval.
Range:
0-255 rings
Default: 0
S2 - Escape Character
S2 holds the decimal value of the ASCII character used as the escape character. The default value corresponds to an ASCII
'+'. A value over 127 disables the escape process, i.e., no escape character will be recognized.
Range:
0-255, ASCII decimal
Default: 43 (+)
S3 - Carriage Return Character
Sets the command line and result code terminator character. Pertains to asynchronous operation only.
Range:
0-127, ASCII decimal
Default: 13 (Carriage Return)
S4 - Line Feed Character
Sets the character recognized as a line feed. Pertains to asynchronous operation only. The Line Feed control character is
output after the Carriage Return control character if verbose result codes are used.
Range:
0-127, ASCII decimal
Default: 10 (Line Feed)
S5 - Backspace Character
Sets the character recognized as a backspace. Pertains to asynchronous operation only. The modem will not recognize the
Backspace character if it is set to a value that is greater than 32 ASCII. This character can be used to edit a command line.
When the echo command is enabled, the modem echoes back to the local DTE the Backspace character, an ASCII space
character and a second Backspace character; this means a total of three characters are transmitted each time the modem
processes the Backspace character.
Range:
0-32, ASCII decimal
Default: 8 (Backspace)
4-4
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AT Command Reference Manual
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier (W-Class Models)
1.
Sets the length of time, in seconds, that the modem will wait before starting to dial after going off-hook when blind
dialing. This operation, however, may be affected by some ATX options according to country restrictions. The “Wait for
Dial Tone” call progress feature (W dial modifier in the dial string) will override the value in register S6.
2.
For W-class models, S6 sets the length of time, in seconds, that the modem will wait for dial tone when encountering a
“W” dial modifier before returning NO DIAL TONE result code.
The modem always pauses for a minimum of 2 seconds, even if the value of S6 is less than 2 seconds.
Range:
2-255 seconds
Default: 2
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier (US Models)
1.
Sets the length of time, in seconds, that the modem will wait for carrier before hanging up. The timer is started when
the modem finishes dialing (originate), or 2 seconds after going off-hook (answer). In originate mode, the timer is reset
upon detection of answer tone if allowed by country restrictions.
2.
Sets the length of time, in seconds, that modem will wait for silence when encountering the @ dial modifier before
continuing with the next dial string parameter.
3.
For US models, S7 sets the length of time, in seconds, that the modem will wait for dial tone when encountering a “W”
dial modifier before continuing with the next dial string parameter.
Range:
1-255 seconds
Default: 50
S8 - Pause Time For Dial Delay
Sets the time, in seconds, that the modem must pause when the “,” dial modifier is encountered in the dial string.
Range:
0-255 seconds
Default: 2
S9 - Carrier Detect Response Time
Sets the time, in tenths of a second, that the carrier must be present before the modem considers it valid and turns on
RLSD. As this time is increased, there is less chance to detect a false carrier due to noise from the telephone line.
Range:
1-255 tenths of a second
Default: 6 (0.6 second)
S10 - Lost Carrier To Hang Up Delay
Sets the length of time, in tenths of a second, that the modem waits before hanging up after a loss of carrier. This allows for
a temporary carrier loss without causing the local modem to disconnect. When register S10 is set to 255, the modem
functions as if a carrier is always present.
The actual interval the modem waits before disconnecting is the value in register S10 minus the value in register S9.
Therefore, the S10 value must be greater than the S9 value or else the modem disconnects before it recognizes the carrier.
Range:
1-255 tenths of a second
Default: 14 (1.4 seconds)
S11 - DTMF Tone Duration
Sets the duration of tones in DTMF dialing (US models only). This value has no effect on pulse dialing.
For W-class models, this parameter is a country parameter loaded by ConfigurACE.
Range:
50-255 milliseconds
Default: 95 (95 milliseconds)
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AT Command Reference Manual
S12 - Escape Prompt Delay (EPD)
Defines the maximum period, in fiftieths of a second, allowed between receipt of the last character of the three escape
character sequence from the DTE and sending of the OK result code to the DTE. If any characters are detected during this
time, the OK will not be sent. Note that sending of the OK result code does not affect entry into command mode. (See
3.1.3.)
Range:
0-255 1/50 of a second
Default: 50 (1 second)
S13 - Reserved
S14 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 138 (8Ah) (10001010b)
Bit 0
This bit is ignored.
Bit 1
Command echo (En)
Bit 2
Bit 3
0=
Disabled (E0)
1=
Enabled (E1) (Default.)
Quiet mode (Qn)
0=
Send result codes (Q0) (Default.)
1=
Do not send result codes (Q1)
Result codes (Vn)
0=
Numeric (V0)
1=
Verbose (V1) (Default.)
Bit 4
Reserved
Bit 5
Tone (T)/Pulse (P)
0=
Tone (T) (Default.)
1=
Pulse (P)
Bit 6
Reserved
Bit 7
Originate/Answer
0=
Answer
1=
Originate (Default.)
S15 - Reserved
4-6
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AT Command Reference Manual
S16 - General Bit Mapped Test Options Status
Indicates the test in progress status.
Default: 0
Bit 0
Local analog loopback
0=
Disabled (Default.)
1=
Enabled (&T1)
Bit 1
Not used
Bit 2
Local digital loopback
Bit 3
0=
Disabled (Default.)
1=
Enabled (&T3)
Remote digital loopback (RDL) status
Bit 4
0=
Modem not in RDL (Default.)
1=
RDL in progress
RDL requested (AT&T6)
Bit 5
0=
RDL not requested (Default.)
1=
RDL requested (&T6)
RDL with self test
Bit 6
0=
Disabled (Default.)
1=
Enabled (&T7)
Local analog loopback (LAL) with self test
Bit 7
0=
Disabled (Default.)
1=
Enabled (&T8)
Not used
S17 - Reserved
S18 - Test Timer
Sets the length of time, in seconds, that the modem conducts a test (commanded by &Tn) before returning to the command
mode. If this register value is zero, the test will not automatically terminate; the test must be terminated from the command
mode by issuing an &T0 or H command. When S18 is non-zero, the modem returns the OK message upon test termination.
Range:
0-255 seconds
Default: 0
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4-7
AT Command Reference Manual
S19 - AutoSync Bit Mapped Options
Defines the options for AutoSync operation (see &Q4 command). S19 must be set to the desired value before &Q4 is
issued.
Default: 0
Bit 0
Reserved
Bit 1
BSC/HDLC format select
Bit 2
0=
BSC selected (Default.)
1=
HDLC selected
Address detection enable/disable
Bit 3
0=
Disabled (Default.)
1=
Enabled
NRZI/NZI coding select
Bit 4
0=
NRZI (Default.)
1=
NZI
Idle indicator select
Bits 5 - 7
0=
Mark idle (Default.)
1=
Flag or sync idle
Reserved
S20 - AutoSync HDLC Address or BSC Sync Character
Defines the HDLC address (S19 bit 1 = 1) or BSC Sync Character (S19 bit 1 = 0) for AutoSync operation (see &Q4
command). S20 must be set to the desired value before &Q4 is issued.
Range:
0-255
Default: 0
4-8
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AT Command Reference Manual
S21 - V.24/General Bit Mapped Options Status
Indicates the status of command options.
Default: 52 (34h) (00110100b)
Bit 0
0=
&J0 (Default.)
1=
&J1
Bit 1
Reserved
Bit 2
CTS behavior (&Rn)
Bits 3-4
Bit 5
Bit 6
Bit 7
1048
Set by &Jn command but ignored otherwise.
0=
CTS tracks RTS (&R0)
1=
CTS always on (&R1) (Default.)
DTR behavior (&Dn)
0=
&D0 selected
1=
&D1 selected
2=
&D2 selected (Default.)
3=
&D3 selected
RLSD (DCD) behavior (&Cn)
0=
&C0 selected
1=
&C1 selected (Default.)
DSR behavior (&Sn)
0=
&S0 selected (Default.)
1=
&S1 selected
Long space disconnect (Yn)
0=
Y0 (Default.)
1=
Y1
4-9
AT Command Reference Manual
S22 - Speaker/Results Bit Mapped Options Status
Indicates the status of command options.
Default: 117 (75h) (01110101b)
Bits 0-1
Bits 2-3
Bits 4-6
Bit 7
4-10
Speaker volume (Ln)
0=
Off (L0)
1=
Low (L1) (Default.)
2=
Medium (L2)
3=
High (L3)
Speaker control (Mn)
0=
Disabled (M0)
1=
Off on carrier (M1) (Default.)
2=
Always on (M2)
3=
On during handshake (M3)
Limit result codes (Xn)
0=
X0
4=
X1
5=
X2
6=
X3
7=
X4 (Default.)
Reserved
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AT Command Reference Manual
S23 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 62 (3Dh) (00111110b)
Bit 0
Grant RDL
Bits 1-3
Bits 4-5
Bits 6-7
0=
RDL not allowed (&T5) (Default.)
1=
RDL allowed (&T4)
DTE Rate
0=
0 - 300 bps
1=
600 bps
2=
1200 bps
3=
2400 bps
4=
4800 bps
5=
9600 bps
6=
19200 bps
7=
38400 bps or higher (Default.)
Assumed DTE parity
0=
even
1=
not used
2=
odd
3=
none (Default.)
Guard tone (&Gn)
0=
None (&G0) (Default.)
1=
None (&G1)
2=
1800 Hz (&G2)
S24 - Sleep Inactivity Timer
Sets the length of time, in seconds, that the modem will operate in normal mode with no detected telephone line or DTE line
activity before entering low-power sleep mode. The timer is reset upon any DTE line or telephone line activity. If the S24
value is zero, neither DTE line nor telephone inactivity will cause the modem to enter the sleep mode.
Range:
0-255 seconds
Default: 0
S25 - Delay To DTR
Sets the length of time that the modem will ignore DTR for taking the action specified by &Dn. Its units are seconds for
synchronous modes and one hundredths of a second for other modes.
Range:
0-255 (1 second for synchronous modes 1; 0.01 second otherwise)
Default: 5
S26 - RTS to CTS Delay
Sets the time delay, in hundredths of a second, before the modem turns CTS ON after detecting an OFF-to-ON transition on
RTS when &R0 is commanded. Pertains to synchronous operation only.
Range:
0-255 hundredths of a second
Default: 1
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AT Command Reference Manual
S27 - Bit Mapped Options Status
Indicates the status of command options.
Default: 73 (49h) (01001001b)
Bits 0,1,3
Bit 2
Synchronous/asynchronous selection (&Mn/&Qn)
&M0 or &Q0
&M1 or &Q1
&M2 or &Q2
&M3 or &Q3
&Q4
&Q5 (Default.)
&Q6
Leased line control (&Ln)
0=
Bits 4 - 5
Bit 6
Dial up line (&L0) (Default.)
Internal clock select (&Xn)
0=
Internal clock (&X0) (Default.)
1=
External clock (&X1)
2=
Slave clock (&X2)
CCITT/Bell mode select (Bn)
0=
CCITT mode (B0)
1=
Bell mode (B1) (Default.)
Bit 7 - Reserved
4-12
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AT Command Reference Manual
S28 - Bit Mapped Options Status
Default: 0
Bits 0 - 1
Reserved
Bit 2
Reserved (always 0).
Bits 3 - 4
Pulse dialing (&Pn)
Bit 5-7
0=
39%-61% make/break ratio at 10 pulses per second (&P0) (Default.)
1=
33%-67% make/break ratio at 10 pulses per second (&P1)
2=
39%-61% make/break ratio at 20 pulses per second (&P2)
3=
33%-67% make/break ratio at 20 pulses per second (&P3)
Reserved
S29 - Flash Dial Modifier Time
Sets the length of time, in units of 10 ms, that the modem will go on-hook when it encounters the flash (!) dial modifier in the
dial string. The time can be limited as it is a country dependent parameter.
Range:
0-255 10 ms intervals
Default: 70 (700 ms)
S30 - Disconnect Inactivity Timer
Sets the length of time, in tens of seconds, that the modem will stay online before disconnecting when no data is sent or
received. In error-correction mode, any data transmitted or received will reset the timer. In other modes, any data
transmitted will reset the timer. The timer is inoperative in synchronous mode.
Range:
0-255 tens of seconds (0-2550 seconds)
Default: 0 (disabled)
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AT Command Reference Manual
S31 - Bit Mapped Options Status
Default: 194 (C2h) (11000010b)
Bit 0
Single line connect message enable/disable (\Vn)
Bit 1
0=
Messages controlled by S95, Wn and Vn (\V0) (Default)
1=
Single line connect message (\V1)
Auto line speed detection (Nn)
Bits 2-3
Bits 4-5
Bits 6-7
0=
Disabled (N0)
1=
Enabled (N1) (Default.)
Error correction progress messages (Wn)
0=
DTE speed only (W0) (Default)
1=
Full reporting (W1)
2=
DCE speed only (W2)
Caller ID (#CID)
0=
Caller ID disabled (#CID=0) (Default)
1=
Short (formatted) Caller ID enabled (#CID=1)
2=
Long (unformatted) Caller ID enabled (#CID=2)
Reserved (Default = 11b)
S32 - XON Character
Sets the value of the XON character.
Range:
0-255, ASCII decimal
Default: 17 (11h)
S33 - XOFF Character
Sets the value of the XOFF character.
Range:
0-255, ASCII decimal
Default: 19 (13h)
S34-S35 - Reserved
4-14
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AT Command Reference Manual
S36 - LAPM Failure Control
Default: 7 (00000111b)
Bits 0-2
Bits 3-7
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This value indicates what should happen upon a LAPM failure. These fallback options are
initiated immediately upon connection if S48=128. If an invalid number is entered, the number is
accepted into the register, but S36 will act as if the default value has been entered.
0=
Modem disconnects.
1=
Modem stays on-line and a Direct mode connection is established.
2=
Reserved.
3=
Modem stays on-line and a Normal mode connection is established.
4=
An MNP connection is attempted and if it fails, the modem disconnects.
5=
An MNP connection is attempted and if it fails, a Direct mode connection is
established.
6=
Reserved.
7=
An MNP connection is attempted and if it fails, a Normal mode connection is
established. (Default.)
Reserved
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S37 - Desired Line Connection Speed
This register specifies the desired line connection speed.
Notes:
1.
When the Nn command is issued or the S37 register value is modified, the +MS command subparameters are updated
to reflect the speed and modulation specified by the S37 value (see +MS command). For example:
If N0 command is active, S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000
If N1 command is active, S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
2.
S37 is not updated by the +MS command.
3.
Use of the +MS command is recommended instead of the Nn and S37=x commands. Nn and S37=x commands are
supported for compatibility with existing communication software.
Default: 0
Bits 0-4
Bits 5-7
4-16
Desired line connection speed. This is interlinked with the Fn command (RC144). If an invalid
number is entered, the number is accepted into the register, but S37 will act as if the default
value has been entered.
0=
Attempt automode connection. If N0 is active, connection is attempted at the most
recently sensed DTE speed (+MS command settings are updated to the
appropriate values). If N1 is active, connection is attempted at the highest
possible speed (+MS settings are updated to 11,1,300,2880 to reflect V.34,
automode, 300 bps minimum speed, and 28800 bps maximum speed). (Default.)
1-3 =
Attempt to connect at 300 bps. F1 command (RC144).
4=
Reserved.
5=
Attempt to connect at V.22 1200 bps. F4 command (RC144).
6=
Attempt to connect at V.22 bis 2400 bps. F5 command (RC144).
7=
Attempt to connect at V.23.
8=
Attempt to connect at V.32 bis/V.32 4800 bps. F6 command (RC144).
9=
Attempt to connect at V.32 bis/V.32 9600 bps. F8 command (RC144).
10 =
Attempt to connect at V.32 bis 12000 bps. F9 command (RC144).
11 =
Attempt to connect at V.32 bis 14400 bps. F10 command (RC144).
12 =
Attempt to connect at V.32 bis 7200 bps. F7 command (RC144).
Reserved
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S38 - Delay Before Forced Hang Up
This register specifies the delay between the modem's receipt of the H command to disconnect (or ON-to-OFF transition of
DTR if the modem is programmed to follow the signal), and the disconnect operation. Applicable to error-correction
connection only. This register can be used to ensure that data in the modem buffer is sent before the modem disconnects.
1.
If S38 is set to a value between 0 and 254, the modem will wait that number of seconds for the remote modem to
acknowledge all data in the modem buffer before disconnecting. If time expires before all data is sent, the NO CARRIER
result code will be issued to indicate that data has been lost. If all data is transmitted prior to time-out, the response to
the H0 command will be OK.
2.
If S38 is set to 255, the modem does not time-out and continues to attempt to deliver data in the buffer until the
connection is lost or the data is delivered.
Range:
0-255 seconds
Default: 20
S39 - Flow Control Bit Mapped Options Status
Default: 3 (00000011b)
Bits 0-2
Bits 3-7
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Status of command options
0=
No flow control
3=
RTS/CTS (&K3) (Default.)
4=
XON/XOFF (&K4)
5=
Transparent XON (&K5)
6=
Both methods (&K6)
Reserved
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S40 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 104 (68h) (01101000b)
Bits 0-1
0=
Disable extended services (-K0) (Default)
1=
Enable extended services (-K1)
2=
Enable extended services (-K2)
Bit 2
Reserved
Bits 3-5
Break Handling (\Kn)
Bits 6-7
4-18
MNP Extended Services (-Kn)
0=
\K0
1=
\K1
2=
\K2
3=
\K3
4=
\K4
5=
\K5 (Default.)
MNP block size (\An)
0=
64 chars (\A0)
1=
128 chars (\A1) (Default.)
2=
192 chars (\A2)
3=
256 chars (\A3)
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S41 - General Bit Mapped Options Status
Indicates the status of command options.
Default: 195 (C3h) (11000011b)
Bits 0 -1
Bits 2, 6
Compression selection (%Cn)
0=
Disabled (%C0)
1=
MNP 5 (%C1)
2=
V.42 bis (%C2)
3=
MNP 5 and V.42 bis (%C3) (Default.)
Auto retrain and fallback/fall forward (%En)
Bit 6 Bit 2
0 =
Retrain and fallback/fall forward disabled (%E0)
1 =
Retrain enabled (%E1)
0 =
Fallback/fall forward enabled (%E2) (Default.)
Bit 3
Reserved
Bits 4-5
Reserved
Bit 7
Reserved
S46 - Data Compression Control
Controls selection of compression. The following actions are executed for the given values:
Range:
136 or 138
Default: 138
S46=136
Execute error correction protocol with no compression.
S46=138
Execute error correction protocol with compression. (Default.)
S48 - V.42 Negotiation Action
The V.42 negotiation process determines the capabilities of the remote modem. However, when the capabilities of the
remote modem are known and negotiation is unnecessary, this process can be bypassed if so desired.
Range:
0, 7, or 128 If an invalid number is entered, it is accepted into the S-Register, but S48 will act as if 128
has been entered.
Default: 7
1048
S48=0
Disable negotiation; bypass the detection and negotiation phases; and proceed with LAPM.
S48=7
Enable negotiation. (Default.)
S48=128
Disable negotiation; bypass the detection and negotiation phases; and proceed at once with the
fallback action specified in S36. Can be used to force MNP.
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S82 - Break Handling Options
S82 is for compatibility purposes only, changing this register will not have any affect.
S86 - Call Failure Reason Code
When the modem issues a NO CARRIER result code, a value is written to this S-Register to help determine the reason for
the failed connection. S86 records the first event that contributes to a NO CARRIER message. The cause codes are:
Range:
0, 4, 5, 9, 12, 13, or 14
Default:
S86=0
Normal disconnect, no error occurred.
S86=4
Loss of carrier.
S86=5
V.42 negotiation failed to detect an error-correction modem at the other end.
S86=9
The modems could not find a common protocol.
S86=12
Normal disconnect initiated by the remote modem.
S86=13
Remote modem does not respond after 10 re-transmissions of the same message.
S86=14
Protocol violation.
S91 - PSTN Transmit Attenuation Level
Sets the transmit attenuation level from 0 to 15 dBm for the PSTN mode, resulting in a transmit level from 0 to -15 dBm, In
some countries, the transmit level may not be changed and there are checks to prevent transmit attenuation level change
using ConfigurACE.
Range:
0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level.)
Default: 10 (-10 dBm transmit level.)
S92 - Fax Transmit Attenuation Level
Sets the transmit attenuation level from 0 to 15 dBm for the fax mode, resulting in a transmit level from 0 to -15 dBm. In
some countries, the transmit level may not be changed and there are checks to prevent transmit attenuation level change
using ConfigurACE.
Range:
0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level.)
Default: 10 (-10 dBm transmit level.)
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S95 - Extended Result Codes
The bits in this register can be set to override some of the Wn command options. A bit set to a 1 in this register will enable
the corresponding result code regardless of the Wn setting. Also, refer to Table 3-1.
Default: 0
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Bit 0
CONNECT result code indicates DCE speed instead of DTE speed.
Bit 1
Append/ARQ to CONNECT XXXX result code in error-correction mode (XXXX = rate; see Table
3-1).
Bit 2
Enable CARRIER XXXX result code (XXXX = rate; see Table 3-1.
Bit 3
Enable PROTOCOL XXXX result code (XXXX = protocol identifier; see Table 3-1).
Bit 4
Reserved.
Bit 5
Enable COMPRESSION result code (XXXX = compression type; see Table 3-1).
Bit 6
Reserved.
Bit 7
Reserved.
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5. FAX CLASS 1 COMMANDS
5.1 FAX I/O PROCESSING
The fax I/O interface supports asynchronous serial and parallel interfaces. The interface rate is 19200 bps. The character
format is 8 bits data, no parity, and 1 stop bit. Start and stop elements are removed from the transmit data and added to the
receive data. Both transmit and receive data are buffered. Flow control using XON/XOFF (DC1/DC3) or RTS/CTS is
provided.
Unique control character strings are identified, filtered, or reinserted into the I/O data stream. These control characters and
their resultant action are described below.
5.1.1 DTE-to-Modem Transmit Data Stream
Characters Detected
Action Taken
Delete characters.
Recognize as a string terminator and take appropriate action.
Replace with single character.
5.1.2 Modem-to-DTE Receive Data Stream
Characters Detected
Action Taken
Insert extra ahead of .
The modem also identifies the end of a frame by inserting into the data stream after the FCS bytes.
5.1.3 Fax Mode Selection
Fax class 1 commands are identified in Table 5-1. Fax modes and rates are determined by the AT+F commands as
described in Section 5.2.
Table 5-1. Fax Class 1 Commands
Command
+FCLASS=
+FAE=n
+FTS=n
+FRS=n
+FTM=n
+FRM=n
+FTH=n
+FRH=n
Function
Service Class ID
Service Class
Fax Class 1 Commands
Data/Fax Auto Answer
Stop Transmission and Wait
Receive Silence
Transmit Data
Receive Data
Transmit Data with HDLC Framing
Receive Data with HDLC Framing
5.1.4 Fax Origination
Origination of fax calls is made using the ATD command. Upon completion of the dial function, a calling tone at 1100 Hz is
transmitted, with a cadence of 0.5 seconds on and 3 seconds off. The modem automatically enters mode +FRH=3 and
sends the CONNECT message to the DTE when FSK flags are detected from the remote.
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5.1.5 Fax Answering
Answering of fax calls is identical to answering of data calls with the exception that the modem enters the fax handshaking
mode instead of the data handshaking mode after going off-hook. If +FAE=0, the modem, after sending answer tone,
automatically enters fax mode (+FTH=3), sends the CONNECT message to the DTE, and starts sending FSK flags. If
+FAE=1, the modem determines whether the caller is a data modem or fax modem and sends the DATA or FAX result code,
respectively, to the DTE.
5.1.6 Fax Control Transmission
Fax control transmission is initiated by the +FTH=n command. After this command is issued, the modem generates the
CONNECT message and transmits carrier in the modulation scheme specified by the parameter n. The modem then
transmits HDLC flags for a minimum of 1 second. The modem continues to transmit the HDLC flags until it receives a
character from the DTE.
When characters are received from the DTE, the modem adds start and end flags, performs zero-bit insertion, generates
FCS, and deletes character pairs before transmitting the characters to the remote fax machine. Each
sequence is transmitted as a single . is considered as the end of frame marker and is
not transmitted. All data received from the DTE after is ignored by the modem until the modem generates
either the CONNECT, OK, or ERROR result code.
If no more data is in the transmit buffer and the final bit was a 1 (bit 4 of the second byte received from the DTE), the
modem generates the OK result code and returns to the command mode. If the final bit was a 0, the modem generates the
CONNECT message and waits for further data from the DTE while transmitting HDLC flags. If no more data is received
before 5 seconds elapse, the modem drops carrier, goes on-hook, and generates the ERROR result code.
5.1.7 Fax Control Reception
Fax control reception is initiated using the AT+FRH=n command. After this command is issued, the modem looks for carrier
in the modulation scheme specified by the parameter n. If no carrier is detected before the period of time specified by
register S7 expires, the modem generates the NO CARRIER message and returns to command mode. If a carrier is
detected that is not the one specified by the parameter n, the modem generates the +FCERROR message and returns to
the command mode. If the specified carrier is detected, the modem generates the CONNECT message and enters the
HDLC receive mode.
In HDLC receive mode, the modem receives HDLC frames from the remote fax machine, strips the flags, performs zero-bit
deletion, performs error checking, and handles character pairs before passing the data to the DTE. The modem
prefixes each character with another character before sending it to the DTE. After the last byte in the frame,
the modem sends to the DTE marking the end of the frame. The modem then generates either the OK
message if no errors were detected or the ERROR message if errors were detected (FCS is incorrect), and returns to
command mode.
While in command mode, the modem continues to receive data in the selected modulation scheme, and sends the data after
sending the CONNECT message to the DTE when the DTE reissues the +FRH command with the same parameter. If the
DTE issues the +FRH command with a different parameter, the modem clears all buffers and proceeds as described
previously.
If carrier is lost while in command mode and the DTE reissues the +FRH command with the same parameter, and there is
no data in the buffer, the modem sends the ERROR result code to the DTE and returns to the command mode. If there is
data in the buffer, the modem sends the next frame of buffered data to the DTE, followed by , and either the
ERROR result code if errors were detected or the OK result code if no errors were detected. The modem then returns to
command mode.
The modem concludes an error is detected if carrier is lost for any period of time during or before the reception of a frame. If
carrier is lost for a time period longer than the time specified by the register S10, the modem finishes delivering the data in
the receive buffer (if any) to the DTE, sends , generates the ERROR message, and returns to command
mode. All subsequent data received from the remote is discarded.
If the modem detects a frame abort sequence (seven consecutive ones with no zero insertion) while it is waiting for a frame
beginning flag (it was receiving HDLC flags), it will wait for the HDLC flags again until either carrier is lost, or the DTE aborts
the process by sending an abort character or by dropping DTR with &D2 in effect. If the frame abort sequence is detected
while the modem is receiving a frame it finishes delivering the data in the receive buffer (if any) to the DTE, sends
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, generates the ERROR message, and returns to command mode. The modem keeps looking for HDLC flags
followed by more data from the remote, with the selected modulation scheme.
If the modem detects a receive buffer overflow condition, it concludes that there was an FCS error in that frame. The modem
will receive more frames only if a starting flag is detected and there is room in the receive buffer. If a starting flag is detected
and there is no room in the buffer, the modem discards all data in that frame.
If the modem receives any character from the DTE after the +FRH command (except flow control characters if software flow
control is in effect), or if the modem detects a high-to-low transition of the DTR signal while &D1 is in effect, it sends
to the DTE, generates OK result code, and returns to command mode. The receive buffer is cleared and all
data received from the remote is discarded. If the modem detects a DTR drop while &D2 is in effect, it goes on-hook, sends
to the DTE, generates OK result code, and returns to command mode. If the modem detects a DTR drop
while &D3 is in effect, the modem performs a warm reset.
5.1.8 Fax Data Transmission
Fax data transmission is initiated by the AT+FTM=n command. After this command is issued, the modem generates the
CONNECT message and transmits carrier in the modulation scheme specified by the parameter n. The modem then
transmits constant 1 bits for a minimum of one second and continues to transmit constant 1 bits until it receives a character
from the DTE.
When data is received from the DTE, the modem deletes start and stop bits and deletes all character pairs
before transmitting the data to the remote. Each sequence is transmitted as a single . is
considered as the end of stream marker, and is not transmitted. All data received from the DTE after the is
ignored by the modem until the modem generates either the CONNECT, OK, or ERROR result code.
If no more data is in the transmit buffer, and the last transmitted character was not an ASCII NULL, the modem generates
the OK result code and returns to the command mode. If the last character transmitted was an ASCII NULL, the modem
generates the CONNECT message to the DTE and waits for further data from the DTE while transmitting NULLs to the
remote. If more data is received before five seconds elapse, the modem continues to transmit the data as described in the
previous paragraph. If five seconds elapse and no data is received from the DTE, the modem drops carrier, goes on-hook,
and generates the ERROR result code.
5.1.9 Fax Data Reception
Fax data reception is initiated using the AT+FRM=n command. After this command is issued, the modem looks for carrier in
the modulation scheme specified by the parameter n. If no carrier is detected before the period of time specified by register
S7 expires, the modem generates the NO CARRIER message and returns to command mode. If a V.21 carrier is detected
when a high speed carrier is expected, the modem generates the +FCERROR message and returns to the command mode.
If the specified carrier is detected, the modem generates the CONNECT message and enters the data receive mode.
While in data receive mode, the modem receives data from the remote, adds start and stop bits, and handles
character pairs before passing the data to the DTE. The modem prefixes each character with another
character before sending it to the DTE.
If the modem detects a receive buffer overflow condition, it stops receiving from the remote until there is room in the receive
buffer. The modem informs the DTE of the buffer overflow after it sends to the DTE the last character that was stored in the
buffer before the overflow occurred.
If the modem receives any character from the DTE after the +FRM command (except flow control characters if software flow
control is in effect), or if the modem detects a high-to-low transition of the DTR signal while &D1 is in effect, it sends
to the DTE, generates the OK result code, and returns to command mode. The receive buffer is cleared and
all data received from the remote is discarded. If loss of DTR is detected while &D2 is in effect, the modem goes on-hook,
sends followed by OK result code to the DTE, and returns to command mode. If the modem detects a DTR
drop while &D3 is in effect, the modem performs a warm reset.
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5.2 COMMANDS
+FCLASS=n - Select Service Class
+FCLASS=n command sets the active service class.
Parameters: 0-2
Command options:
+FCLASS=0
Select Data Mode (Default.)
+FCLASS=1
Select Facsimile Class 1
+FCLASS=2
Select Facsimile Class 2
+F? - Report Active Configuration
+F? interrogates the modem to determine the active configuration.
Typical responses are:
+FAE?
0 if auto answer is disabled; 1 if auto answer is enabled
+FCLASS?
0 if in data mode; 1 if in fax class 1; 2 if in fax class 2
+F=? - Report Operating Capabilities
+F