Multitech MultiModem EDGE User manual

Wireless EDGE Modems
AT Commands
Reference Guide

Copyright and Technical Support
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 2
AT Commands for Multi-Tech EDGE Modems
MultiModem®EDGE (MTCBA-E)
MultiModem®EDGE with USB (MTCBA-E-U)
MultiModem®iCell (MTCMR-E)
MultiModem®rCell (MTCBA-E-EN2)
Embedded Wireless SocketModem®EDGE (MTSMC-E)
Reference Guide
PN S000371G, Revision G
Copyright
This publication may not be reproduced, in whole or in part, without prior expressed written permission from
Multi-Tech Systems, Inc. All rights reserved. Copyright © 2005-2009, by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and
specifically disclaim any implied warranties of merchantability or fitness for any particular purpose. Furthermore,
Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in
the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such
revisions or changes.
Revisions
Revision Level Date Description
A 07/07/05 Initial release.
B 01/24/06 Added trademarks and registered trademarks to the cover
page. Added a product list and a command list. Removed the
statement in 18.6 that the setting is stored non-volatile.
Changed light blue non-hyperlinked text to black.
C 02/08/07 Added new model MTZPC-E.
D 05/14/07 Updated the Technical Support contact list. Added Important
Note about Autobauding. Explained the ERROR message that
sometimes displays with the AT&V command.
E 05/08/08 Updated for version 04.001. New commands: SNWS, SFNUR,
SICI, SISI, SICO, SICC, SISX, SISE, Internet SIS, SCIM,
SPBW.
F 01/15/09 Added MultiModem®iCell (MTCMR-E) to the list of products
that use these commands. Removed model MTZPC-E from the
list of products that use these commands. Removed Fax
commands.
G 05/13/09 Added MultiModem®rCell (MTCBA-E-EN2) to the list of
products that use these commands.
Trademarks
MultiModem, SocketModem, and the Multi-Tech logo are registered trademarks of Multi-Tech Systems, Inc.
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: [phone] or 800-328-9717
Fax: [phone]
Internet Address: http://www.multitech.com
Technical Support
Country By Email By Phone
Europe, Asia, Africa: [email protected] +(44) 118 959 7774
U.S., Canada, all others: [email protected] 800-972-2439 or 763-717-5863

Table of Contents
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 3
Table of Contents
Chapter 1 – Introduction..............................................................................................................................................8
1.1 Scope of the Document......................................................................................................................................8
1.2 Related Documents............................................................................................................................................8
1.3 Document Conventions......................................................................................................................................8
1.4 AT Command Syntax .........................................................................................................................................9
1.4.1 Using Parameters ........................................................................................................................................9
1.4.2 Combining AT Commands on the Same Command Line.............................................................................9
1.5 Supported Character Sets................................................................................................................................10
1.5.1 GSM Alphabet Tables and UCS2 Character Values..................................................................................11
1.5.2 UCS2 and GSM Data Coding and Conversion for SMS Text Mode...........................................................13
1.6 Serial Interface Flow Control ............................................................................................................................15
1.6.1 Software Flow Control (XON/OFF Handshake) .........................................................................................15
1.6.2 Hardware Flow Control (RTS/CTS Handshake).........................................................................................15
1.7 Communication between Customer Application and Multi-Tech Wireless Modem...........................................16
1.8 Unsolicited Result Code Presentation..............................................................................................................16
1.9 Common PCN Handset Specification (CPHS) .................................................................................................17
1.10 Errors and Messages .....................................................................................................................................17
Chapter 2 – Configuration Commands.....................................................................................................................18
2.1 AT&F Set All Current Parameters to Manufacturer Defaults ..........................................................................18
2.2 AT&V Display Current Configuration..............................................................................................................18
2.2.1 AT&V Responses.......................................................................................................................................19
2.3 AT&W Stores Current Configuration to User Defined Profile .........................................................................19
2.4 ATQ Set Result Code Presentation Mode......................................................................................................20
2.5 ATV Set Result Code Format Mode...............................................................................................................20
2.5.1 Verbose and Numeric Result Codes..........................................................................................................20
2.6 ATX Set CONNECT Result Code Format and Call Monitoring ......................................................................21
2.7 AT\ V Set CONNECT Result Code Format ....................................................................................................21
2.8 ATZ Set all Current Parameters to User Defined Profile ................................................................................21
2.9 AT+CFUN Set Phone Functionality................................................................................................................22
2.9.1 Wake up the ME from SLEEP Mode..........................................................................................................23
2.10 AT^SMSO Switch off Mobile Station ............................................................................................................24
2.11 AT+GCAP Request Complete TA Capabilities List ......................................................................................24
2.12 AT+CMEE Mobile Equipment Error Message Format..................................................................................24
2.12.1 CME/CMS Error Code Overview................................................................................................................25
2.13 AT+CSCS Select TE Character Set .............................................................................................................29
2.14 AT^SCFG Extended Configuration Settings.................................................................................................29
Chapter 3 – Status Control Commands ...................................................................................................................42
3.1 AT+CMER Mobile Equipment Event Reporting..............................................................................................42
3.2 AT+CIND Indicator Control ............................................................................................................................43
3.3 AT^SIND Extended Indicator Control.............................................................................................................45
3.4 AT+CEER Extended Error Report..................................................................................................................50
3.4.1 Cause Location ID for the Extended Error Report......................................................................................51
3.4.2 GSM Release Cause for L3 Radio Resource (RR)....................................................................................51
3.4.3 GSM Release Cause for Mobility Management (MM) or Session Management..........................................52
3.4.4 GSM Release Cause for L3 Call Control (CC).............................................................................................53
3.4.5 GSM Release Cause for Supplementary Service Call...............................................................................54
3.4.6 GSM Release Cause for Session Management.........................................................................................54
3.4.7 GSM Cause for L3 Protocol Module or Other Local Cause........................................................................54
3.5 ATS18 Extended Call Release Report ...........................................................................................................55
3.6 AT+CPAS Mobile Equipment Activity Status..................................................................................................55
3.7 AT+WS46 Select Wireless Network...............................................................................................................56
Chapter 4 – Serial Interface Control Commands.....................................................................................................57
4.1 AT\Q Flow Control..........................................................................................................................................57
4.2 AT&C Set Data Carrier Detect (DCD) Mode ..................................................................................................57
4.3 AT&D Set Data Terminal Ready (DTR) Line Mode ........................................................................................57
4.4 AT&S Set Data Set Ready (DSR) Line Mode.................................................................................................58
4.5 ATE Enable Command Echo .........................................................................................................................58
4.6 AT+ICF Serial Interface Character Framing...................................................................................................58
4.7 AT+IFC Set Flow Control Separately for Data Directions...............................................................................59
4.8 AT+ILRR Set TE-TA Local Rate Reporting ....................................................................................................60
4.9 AT+IPR Set Fixed Local Rate ........................................................................................................................60
4.9.1 Autobauding...............................................................................................................................................61
4.10 AT+STPB Transmit Parity Bit (for 7E1 & 7O1 Only).....................................................................................63

Table of Contents
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 4
Chapter 5 – Security Commands..............................................................................................................................64
5.1 AT+CPIN PIN Authentication .........................................................................................................................64
5.1.1 What to Do if PIN or Password Authentication Fails? ................................................................................65
5.2 AT+CPIN2 PIN2 Authentication .....................................................................................................................66
5.3 AT^SPIC Display PIN Counter .......................................................................................................................67
5.4 AT+CLCK Facility Lock ..................................................................................................................................70
5.5 AT^SLCK Facility Lock...................................................................................................................................73
5.6 AT+CPWD Define and Change Password.....................................................................................................73
5.7 AT^SPWD Change Password........................................................................................................................75
Chapter 6 – Identification Commands......................................................................................................................77
6.1 ATI Display Product Identification Information................................................................................................77
6.2 AT+CGMI Request Manufacturer Identification..............................................................................................77
6.3 AT+GMI Request Manufacturer Identification ................................................................................................77
6.4 AT+CGMM Request Model Identification.......................................................................................................77
6.5 AT+GMM Request Model Identification............................................................................................................77
6.6 AT+CGMR Request Revision Identification ...................................................................................................78
6.7 AT+GMR Request Revision Identification ......................................................................................................78
6.8 AT+CGSN Request International Mobile Equipment Identity .........................................................................78
6.9 AT+GSN Request International Mobile Equipment Identity (IMEI).................................................................78
6.10 AT+CIMI Request International Mobile Subscriber Identity (IMSI) ...............................................................79
Chapter 7 – Call-Related Commands .......................................................................................................................80
7.1 Call Status Information.....................................................................................................................................80
7.2 ATA Answer a Call .........................................................................................................................................81
7.3 ATD Mobile Originated Call to a Specified Number .......................................................................................81
7.4 ATD><mem><n> Mobile Originated Call Using Specific Memory and Index Number.....................................83
7.5 ATD><n> Mobile Originated Call from Active Memory Using Index Number ..................................................84
7.6 ATD><str> Mobile Originated Call from Active Memory Using Corresponding Field......................................84
7.7 ATDI Mobile Originated Call to ISDN Number................................................................................................85
7.8 ATDL Redial Last Number Used ....................................................................................................................85
7.9 ATH Disconnect Existing Connection.............................................................................................................85
7.10 AT+CHUP Hang Up Call ..............................................................................................................................86
7.11 AT^SHUP Hang Up Call(s) Indicating a Specific GSM04.08 Release Cause ..............................................86
7.12 ATS0 Set Number of Rings before Automatically Answering a Call.............................................................87
7.13 ATS6 Set Pause before Blind Dialing...........................................................................................................87
7.14 ATS7 Set Number of Seconds to Wait for Connection Completion..............................................................88
7.15 ATS8 Set Number of Seconds to Wait for Comma Dialing Modifier.............................................................88
7.16 ATS10 Set Disconnect Delay after Indicating the Absence of Data Carrier .................................................88
7.17 ATO Switch from Command Mode to Data Mode / PPP Online Mode.........................................................89
7.18 +++ Switch from Data Mode to Command Mode ..........................................................................................89
7.19 AT+CBST Select Bearer Service Type ........................................................................................................90
7.20 AT+CRLP Select Radio Link Protocol Parameters for Originated Non-Transparent Data Calls ..................90
7.21 AT+CLCC List Current Calls of ME..............................................................................................................91
7.22 AT^SLCC Extended List of Current Calls.....................................................................................................92
7.23 AT+CR Service Reporting Control ...............................................................................................................95
7.24 AT+CRC Set Cellular Result Codes for Incoming Call Indication.................................................................96
7.25 AT+CSNS Single Numbering Scheme.........................................................................................................96
7.26 AT^SCNI List Call Number Information........................................................................................................97
7.27 AT^SLCD Display Last Call Duration ...........................................................................................................97
7.28 AT^STCD Display Total Call Duration..........................................................................................................97
7.29 ATP Select Pulse Dialing .............................................................................................................................98
7.30 ATT Select Tone Dialing ..............................................................................................................................98
Chapter 8 – Network Service Commands ................................................................................................................99
8.1 AT+COPN Read Operator Names .................................................................................................................99
8.2 AT+COPS Operator Selection .......................................................................................................................99
8.3 AT^SOPS Extended Operator Selection ......................................................................................................101
8.4 AT+SNWS Manual Network Selection .........................................................................................................102
8.5 AT+CREG Network Registration..................................................................................................................104
8.6 AT+CSQ Signal Quality................................................................................................................................105
8.7 AT^SMONC Cell Monitoring.........................................................................................................................106
8.8 AT^SMOND Cell Monitoring.........................................................................................................................107
8.9 AT^SFNUR Select the Fixed Network User Rate.........................................................................................108
8.10 AT^MONI Monitor Idle Mode and Dedicated Mode....................................................................................109
8.10.1 AT^MONI Responses ............................................................................................................................110
8.10.2 Service States........................................................................................................................................111

Table of Contents
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 5
8.11 AT^MONP Monitor Neighbor Cells.............................................................................................................111
8.11.1 AT^MONP Responses...........................................................................................................................112
8.12 AT^SMONG GPRS Monitor .......................................................................................................................113
8.12.1 AT^SMONG Cell Info Table...................................................................................................................113
8.13 AT^SALS Alternate Line Service................................................................................................................114
8.14 AT^SHOM Display Homezone ...................................................................................................................114
8.15 AT^SPLM Read the PLMN List ..................................................................................................................115
8.16 AT^CPOL Preferred Operator List..............................................................................................................115
8.17 AT^SPLR Read Entry from the Preferred Operators List ...........................................................................116
8.18 AT^SPLW Write an Entry to the Preferred Operators List..........................................................................116
Chapter 9 – Supplementary Service Commands...................................................................................................117
9.1 AT+CACM Accumulated Call Meter (ACM) Reset / Query...........................................................................117
9.2 AT^SACM Advice of Charge and Query of ACM and ACMmax...................................................................117
9.3 AT+CAMM Accumulated Call Meter Maximum (ACMmax) Set or Query.....................................................118
9.4 AT+CAOC Advice of Charge Information.....................................................................................................118
9.5 AT+CCUG Closed User Group ....................................................................................................................119
9.6 AT+CCFC Call Forwarding Number and Conditions Control .......................................................................120
9.7 AT+CCWA Call Waiting ...............................................................................................................................122
9.8 AT+CHLD Call Hold and Multiparty..............................................................................................................124
9.9 AT+CLIP Calling Line Identification Presentation.........................................................................................126
9.10 AT+CLIR Calling Line Identification Restriction..........................................................................................127
9.11 AT+COLP Connected Line Identification Presentation...............................................................................127
9.12 AT+CPUC Price Per Unit and Currency Table...........................................................................................128
9.13 AT+CSSN Supplementary Service Notifications ........................................................................................129
9.14 AT+CUSD Unstructured Supplementary Service Data ..............................................................................130
Chapter 10 – Internet Service Commands .............................................................................................................131
10.1 AT^SICS Internet Connection Setup Profile...............................................................................................133
10.1.1 Example: Default Values of a CSD Connection Profile............................................................................135
10.1.2 Example: GPRS Connection Profile.........................................................................................................136
10.2 AT^SICI Internet Connection Information...................................................................................................136
New command .......................................................................................................................................................136
0...5 136
10.2.1 Checking Connection Profile Status.........................................................................................................137
10.3 AT^SISS Internet Service Setup Profile .....................................................................................................137
10.4 AT^SISI Internet Service Information .........................................................................................................144
10.5 AT^SISO Internet Service Open.................................................................................................................145
10.5.1 Example: Accepting/Rejecting Socket Connection Request from Remote Client ..................................147
10.6 AT^SISC Internet Service Close ................................................................................................................149
10.7 AT^SISR Internet Service Read Data ........................................................................................................150
10.7.1 Example: Socket Host Reads Small Amounts of UDP Data Packets (URC Mode)................................151
10.8 AT^SISW Internet Service Write Data........................................................................................................152
10.8.1 Usage of Parameter <eodFlag>.............................................................................................................153
10.9 AT^SICO Internet Connection Open ..........................................................................................................154
10.10 AT^SICC Internet Connection Close ........................................................................................................155
10.11 AT^SISX Internet Service Execution........................................................................................................155
10.11.1 Example: Ping......................................................................................................................................156
10.12 AT^SISE Internet Service Error Report ....................................................................................................157
10.13 ^SIS Internet Service URC "^SIS"............................................................................................................157
10.13.1 Information Elements Related to the Service Application.....................................................................158
10.13.2 Information Elements Related to FTP Service .....................................................................................159
10.13.3 Information Elements Related to HTTP Service...................................................................................160
10.13.4 Information Elements Related to POP3 Service ..................................................................................160
10.13.5 Information Elements Related to SMTP Service..................................................................................160
10.14 Examples of How to Configure and Use Internet Service Profiles..............................................................161
10.14.1 Selecting URC Mode or Polling Mode..................................................................................................161
10.14.2 Configuring Socket Listener.................................................................................................................161
10.14.3 Configuring Socket Client for Calling a Socket Listener on Another Host............................................162
10.14.4 Socket Client Sends Data via TCP Connection (Polling Mode) ...........................................................162
10.14.5 Socket Client Sends Data via TCP Connection with URCs..................................................................163
10.14.6 Socket Scenario with UDUP Endpoint .................................................................................................163
10.14.7 Configuring and Using FTP Download (URC Mode)............................................................................164
10.14.8 Configuring and Using FTP Upload (URC Mode) ................................................................................165
10.14.9 Configuring SMTP Service Profile........................................................................................................166
10.14.10 Sending Email (URC Mode)...............................................................................................................166
10.14.11 Sending Email (Polling Mode)............................................................................................................167
10.14.12 Configuring POP3 Service Profile......................................................................................................167

Table of Contents
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 6
10.14.13 Retrieving Email (URC Mode)............................................................................................................168
10.14.14 Retrieving Email (Polling Mode).........................................................................................................168
10.14.15 HTTP POST (Polling Mode)...............................................................................................................169
10.14.16 HTTP GET (Polling Mode).................................................................................................................170
Chapter 11 – GPRS Commands..............................................................................................................................171
11.1 AT+CGACT PDP Context Activate or Deactivate.......................................................................................171
11.2 AT+CGANS Manual Response to a Network Request for PDP Context Activation ...................................172
11.3 AT+CGATT GPRS Attach or Detach..........................................................................................................173
11.4 AT+CGAUTO Automatic Response to a Network Request for PDP Context Activation.............................174
11.5 AT+CGDATA Enter Data State ..................................................................................................................175
11.5.1 Automatic Deactivation of PDP Context During Dial-up PPP...................................................................175
11.6 AT+CGDCONT Define PDP Context .........................................................................................................176
11.7 AT+CGEQMIN 3G Quality of Service Profile (Minimum Acceptable) .........................................................177
11.8 AT+CGEQREQ 3G Quality of Service Profile (Requested)........................................................................180
11.9 AT+CGPADDR Show PDP Address ..........................................................................................................182
11.10 AT+CGQMIN Quality of Service Profile (Minimum Acceptable) ...............................................................183
11.11 AT+CGQREQ Quality of Service Profile (Requested)..............................................................................185
11.12 AT+CGREG GPRS Network Registration Status.....................................................................................187
11.13 AT+CGSMS Select Service for MO SMS Messages................................................................................188
11.14 AT^SGACT Query All PDP Context Activations.......................................................................................189
11.15 AT^SGAUTH Set Type of Authentication for PPP Connection.................................................................190
11.16 AT^SGCONF Configuration of GPRS-Related Parameters .....................................................................190
11.17 ATA Manual Response to a Network Request for PDP Context Activation..............................................191
11.18 ATD*99# Request GPRS Service ............................................................................................................191
11.19 ATD*98# Request GPRS IP Service........................................................................................................192
11.20 ATH Manual Rejection of a Network Request for PDP Context Activation...............................................192
11.21 ATS0 Automatic Response to a Network Request for PDP Context Activation........................................193
11.22 Using GPRS AT Commands Examples .....................................................................................................194
11.23 Using the GPRS Dial Command ATD (Example).......................................................................................195
Chapter 12 – Short Message Service (SMS) Commands......................................................................................196
12.1 SMS Parameters..........................................................................................................................................196
12.2 AT+CMGC Send an SMS Command .........................................................................................................199
12.3 AT+CMGD Delete SMS Message ..............................................................................................................199
12.4 AT+CMGF Select SMS Message Format ..................................................................................................199
12.5 AT+CMGL List SMS Messages from Preferred Store ................................................................................200
12.6 AT+CMGR Read SMS Messages..............................................................................................................201
12.7 AT+CMGS Send SMS Message ................................................................................................................202
12.8 AT+CMGW Write Short Messages to Memory...........................................................................................203
12.9 AT+CMSS Send Short Messages from Storage ........................................................................................204
12.10 AT+CNMA New SMS Message Acknowledge to ME/TE Phase 2+ .........................................................204
12.11 AT+CNMI New Short Message Indication................................................................................................205
12.12 AT+CPMS Preferred SMS Message Storage ..........................................................................................207
12.13 AT+CSCA SMS Service Center Address .................................................................................................208
12.14 AT+CSCB Select Cell Broadcast Message Indication..............................................................................208
12.15 AT+CSDH Show SMS Text Mode Parameters ........................................................................................209
12.16 AT+CSMP Set SMS Text Mode Parameters............................................................................................209
12.17 AT+CSMS Select Message Service.........................................................................................................210
12.18 AT^SCML List Concatenated Short Messages from Preferred Store.......................................................211
12.19 AT^SCMR Read Concatenated Short Messages.....................................................................................212
12.20 AT^SCMS Send Concatenated Short Messages .....................................................................................213
12.21 AT^SCMW Write Concatenated Short Messages to Memory ..................................................................213
12.22 AT^SLMS List SMS Memory Storage ......................................................................................................214
12.23 AT^SMGL List Short Messages from Preferred Store without Setting Status to REC READ...................214
12.24 AT^SMGO Set/Query SMS Overflow Presentation Mode or Query SMS Overflow .................................215
12.25 AT^SMGR Read Short Message without Setting Status to REC READ...................................................215
12.26 AT^SSCONF SMS Command Configuration ...........................................................................................216
12.27 AT^SSDA Set SMS Display Availability ...................................................................................................216
12.28 AT^SSMSS Set Short Message Storage Sequence ................................................................................217
Chapter 13 – SIM-Related Commands....................................................................................................................218
13.1 AT+CRSM Restricted SIM Access.............................................................................................................218
13.2 AT^CSIM Generic SIM Access...................................................................................................................220
13.3 AT^SXSM Extended SIM Access...............................................................................................................221
13.4 AT^SCKS Query SIM and Chip Card Holder Status ..................................................................................222
13.5 AT^SSET Indicate SIM Data Ready...........................................................................................................223

Table of Contents
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 7
13.6 AT^SCID Display SIM Card Identification Number.....................................................................................223
13.7 AT+CXXCID Display SIM Card Identification Number ...............................................................................223
Chapter 14 – SIM Application Toolkit (SAT) Commands......................................................................................224
14.1 AT^SSTA SAT Interface Activation ............................................................................................................224
14.2 ^SSTN SAT Notification .............................................................................................................................225
14.3 AT^SSTGI SAT Get Information.................................................................................................................226
14.4 AT^SSTR SAT Response ..........................................................................................................................226
Chapter 15 – Phonebook Commands.....................................................................................................................227
15.1 Sort Order for Phonebooks ..........................................................................................................................227
15.2 AT+CNUM Read Own Numbers ................................................................................................................228
15.3 AT+CPBR Read from Phonebook..............................................................................................................228
15.4 AT+CPBS Select Phonebook Memory Storage .........................................................................................230
15.5 AT+CPBW Write into Phonebook...............................................................................................................231
15.6 AT^SPBW Write into Phonebook with Location Report..............................................................................233
15.7 AT^SDLD Delete the 'Last Number Redial' Memory ..................................................................................234
15.8 AT^SPBC Find First Matching Entry in Sorted Phonebook ........................................................................235
15.9 AT^SPBD Purge Phonebook Memory Storage ..........................................................................................236
15.10 AT^SPBG Display Phonebook Entries in Alphabetical Order...................................................................237
15.11 AT^SPBS Step Through the Selected Phonebook Alphabetically............................................................239
Chapter 16 – Audio Commands..............................................................................................................................241
16.1 Audio Programming Model...........................................................................................................................241
16.2 ATL Set Monitor Speaker Loudness ..........................................................................................................241
16.3 ATM Set Monitor Speaker Mode ................................................................................................................241
16.4 AT+CLVL Loudspeaker Volume Level .......................................................................................................242
16.5 AT+CMUT Mute Control.............................................................................................................................242
16.6 AT+VTD Tone Duration..............................................................................................................................243
16.7 AT+VTS DTMF and Tone Generation........................................................................................................243
16.8 AT^SAIC Audio Interface Configuration .....................................................................................................244
16.9 AT^SNFA Set or Query of Microphone Attenuation ...................................................................................245
16.10 AT^SNFD Set Audio Parameters to Manufacturer Default Values...........................................................246
16.11 AT^SNFI Set Microphone Path Parameters.............................................................................................246
16.12 AT^SNFM Set Microphone Audio Path ....................................................................................................247
16.13 AT^SNFO Set Audio Output (= Loudspeaker Path) Parameter................................................................248
16.14 AT^SNFPT Set Progress Tones...............................................................................................................249
16.15 AT^SNFS Select Audio Hardware Set .....................................................................................................249
16.16 AT^SNFTTY Signal TTY/CTM Audio Mode Capability.............................................................................250
16.17 AT^SNFV Set Loudspeaker Volume ........................................................................................................251
16.18 AT^SNFW Write Audio Setting in Non-Volatile Store...............................................................................251
16.19 AT^SRTC Ring Tone Configuration .........................................................................................................252
Chapter 17 – Hardware-Related Commands..........................................................................................................254
17.1 AT+CCLK Real Time Clock........................................................................................................................254
17.2 AT+CALA Set Alarm Time .........................................................................................................................255
17.3 AT^SCTM Set Critical Operating Temperature Presentation Mode or Query Temperature .......................257
17.4 AT^SSYNC Configure SYNC Pin...............................................................................................................259
17.4.1 ME Status Indicated by Status LED Patterns...........................................................................................259
Chapter 18 – Miscellaneous Commands................................................................................................................261
18.1 A/ Repeat Previous Command Line ...........................................................................................................261
18.2 ATS3 Set Command Line Termination Character ......................................................................................261
18.3 ATS4 Set Response Formatting Character................................................................................................261
18.4 ATS5 Write Command Line Editing Character...........................................................................................262
Chapter 19 – Summary Tables................................................................................................................................263
19.1 Restricted Access to SIM Data after SIM PIN Authentication.......................................................................263
19.2 Star-Hash (*#) Network Commands.............................................................................................................264
19.3 AT Commands and SIM PIN Dependency...................................................................................................266
19.4 Availability of AT Commands Depending on Operating Mode of ME ...........................................................270
19.5 AT Command Settings Storable with AT&W ................................................................................................274
19.6 Factory Defaults Restorable with AT&F .......................................................................................................275
19.7 Summary of Unsolicited Result Codes (URC)..............................................................................................277
Index..........................................................................................................................................................................279

Chapter 1 – Introduction
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 8
Chapter 1 – Introduction
1.1 Scope of the Document
This document presents the AT Command set for the Multi-Tech Systems, Inc. wireless EDGE devices.
1.2 Related Documents
1. ITU-T Recommendation V.24: List of definitions for interchange circuits between data terminal equipment
(DTE) and data circuit-terminating equipment (DCE)
2. ITU-T Recommendation V.250: Serial asynchronous automatic dialing and control
3. 3GPP TS 100 918/EN 300 918 (GSM 02.04): General on supplementary services
4. 3GPP TS 100 907 (GSM 02.30): Man-Machine Interface (MMI) of the Mobile Station (MS)
5. 3GPP TS 23.038 (GSM 03.38): Alphabets and language specific information
6. 3GPP TS 27.005 (GSM 07.05): Use of Data Terminal Equipment - Data Circuit terminating Equipment (DTE
- DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)
7. 3GPP TS 27.007 (GSM 07.07): AT command set for User Equipment (UE)
8. 3GPP TS 27.060 (GSM 07.60): Mobile Station (MS) supporting Packet Switched Services
9. 3GPP TS 51.011 (GSM 11.11): Specification of the Subscriber Identity Module - Mobile Equipment (SIM -
ME) interface
10. 3GPP TS 11.14 (GSM 11.14): Specification of the SIM Application Toolkit for the Subscriber Identity Module
- Mobile Equipment (SIM - ME) interface
11. 3GPP TS 22.101 (GSM 22.101): Service principles
12. Common PCN Handset Specification (CPHS) v4.2
1.3 Document Conventions
Throughout the document, the GSM engines are referred to as:
ME (Mobile Equipment)
MS (Mobile Station)
TA (Terminal Adapter)
DCE (Data Communication Equipment)
To control your GSM engine you can simply send AT Commands via its serial interface. The controlling device at the
other end of the serial line is referred to as:
TE (Terminal Equipment)
DTE (Data Terminal Equipment) or ‘the application’ (probably running on an embedded system).
All abbreviations and acronyms used throughout this document are based on the GSM specifications. For definitions
please refer to TR 100 350 V7.0.0 (1999-08), (GSM 01.04, version 7.0.0 release 1998).

Chapter 1 – Introduction
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 9
1.4 AT Command Syntax
The “AT” or “at” prefix must be set at the beginning of each command line. To terminate a command line enter <CR>.
Commands are usually followed by a response that includes “<CR><LF><response><CR><LF>”. Throughout this
document, only the responses are presented, <CR><LF> are omitted intentionally.
Table 1.4: Types of AT commands and responses.
AT Command Type Syntax Function
Test command AT+CXXX=? The mobile equipment returns the list of parameters and value ranges
set with the corresponding Write command or by internal processes.
Read command AT+CXXX? This command returns the currently set value of the parameter(s).
Write command AT+CXXX=<...> This command sets use
r
-definable parameter values.
Exec(ution)
command
AT+CXXX The execution command reads non-variable parameters determined by
internal processes in the GSM engine.
1.4.1 Using Parameters
•Optional parameters are enclosed in square brackets. If optional parameters are omitted, the current
settings are used until you change them.
•Optional parameters or subparameters can be omitted unless they are followed by other parameters. If you
want to omit a parameter in the middle of a string it must be replaced by a comma. See also example 1.
•A parameter value enclosed in square brackets represents the value that will be used if an optional
parameter is omitted. See also example 2.
•When the parameter is a character string; e.g., <text> or <number>, the string must be enclosed in quotation
marks (e.g., “Charlie Brown” or “+49030xxxx”). Symbols in quotation marks will be recognized as strings.
•All spaces will be ignored when using strings without quotation marks.
•It is possible to omit the leading zeros of strings which represent numbers.
•If an optional parameter of a V.250 command is omitted, its value is assumed to be 0.
Example 1: Omitting parameters in the middle of a string
AT+CCUG? Query current setting
+CCUG: 1,10,1
OK
AT+CCUG=,9 Set only the middle parameter
OK
AT+CCUG? Query new setting
+CCUG: 1,9,1
OK
Example 2: Using default parameter values for optional parameters
AT+CFUN=7,0 Activate CYCLIC SLEEP mode, don’t reset ME
OK
AT+CFUN? Query ME mode
+CFUN: 7
OK
AT+CFUN= Set ME back to normal (default parameters: 1,0)
OK
+CFUN: 1
OK
1.4.2 Combining AT Commands on the Same Command Line
You may enter several commands on the same line. This eliminates the typing of “AT” or “at” before each
command. Instead, it is needed only once - at the beginning of the command line. Use a semicolon as
command delimiter.
The table below lists the AT commands you cannot enter together with other commands on the same line.
Otherwise, the responses may not be in the expected order.
AT Command Type Comment
GSM 7.07 commands with AT commands, Prefix AT^S)
GSM 7.05 commands (SMS) To be used as standalone commands
Commands starting with AT& To be used as standalone commands
AT+IPR To be used as standalone commands
Note: When concatenating AT commands please keep in mind that the sequence of processing may be different
from the sequential order of command input. Therefore, if the consecutive order of the issued commands and
associated responses is your concern, avoid concatenating commands on the same line.

Chapter 1 – Introduction
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 10
1.5 Supported Character Sets
The ME supports two character sets: GSM 03.38 (7 bit, also referred to as GSM alphabet or SMS alphabet) and
UCS2 (16 bit, refer to ISO/IEC 10646). See AT+CSCS for information about selecting the character set. Character
tables can be found below.
Explanation of terms
•International Reference Alphabet (IRA)
IRA means that one byte is displayed as two characters in hexadecimal format. For example, the byte 0x36
(decimal 54) is displayed as “36” (two characters). IRA is used here for input 8-bit or 16-bit data via terminal
devices using text mode. This means only characters ‘A’..F’,’a’..’f’ and ‘0’..’9’ are valid.
•Escape sequences
The escape sequence used within a text coded in the GSM default alphabet (0x1B) must be correctly
interpreted by the TE, both for character input and output. To the module, an escape sequence appears like
any other byte received or sent.
•Terminal Adapter (TA)
TA is used equivalent to Mobile Equipment (ME) which stands for the GSM module described here. It uses
GSM default alphabet as its character set.
•Terminal Equipment (TE)
TE is the device connected to the TA via serial interface. In most cases TE is an ANSI/ASCII terminal that
does not fully support the GSM default alphabet, for example MS HyperTerminal.
•TE Character Set
The character set currently used by Terminal Equipment is selected with AT+CSCS.
•Data Coding Scheme (dcs)
DCS is part of a short message and is saved on the SIM. When writing a short message to the SIM in text
mode, the dcs stored with AT+CSMP is used and determines the coded character set.
The behavior when encountering characters, that are not valid characters of the supported alphabets, is undefined.
Due to the constraints described below it is recommended to prefer the USC2 alphabet in any external application.
If the GSM alphabet is selected all characters sent over the serial line (between TE and TA) are in the range from 0 to
127 (7 Bit range). CAUTION: ASCII alphabet (TE) is not GSM alphabet (TA/ME) !
Several problems resulting from the use of GSM alphabet with ASCII terminal equipment:
•“@” character with GSM alphabet value 0 is not printable by an ASCII terminal program (e.g., Microsoft©
HyperTerminal®).
•“@” character with GSM alphabet value 0 will terminate any C string! This is because the 0 is defined as C
string end tag. Therefore, the GSM Null character may cause problems on application level when using a
‘C’- function as “strlen()”. This can be avoided if it is represented by an escape sequence as shown in the
table below.
By the way, this may be the reason why even network providers often replace “@”with “@=*” in their SIM
application.
•Other characters of the GSM alphabet are misinterpreted by an ASCII terminal program. For example, GSM
“ö” (as in “Börse”) is assumed to be “|” in ASCII, thus resulting in “B|rse”. This is because both alphabets
mean different characters with values hex. 7C or 00 and so on.
•In addition, decimal 17 and 19 which are used as XON/XOFF control characters when software flow control
is activated, are interpreted as normal characters in the GSM alphabet.
When you write characters differently coded in ASCII and GSM (e.g., Ä, Ö, Ü), you need to enter escape
sequences. Such a character is translated into the corresponding GSM character value and, when output later,
the GSM character value can be presented. Any ASCII terminal then will show wrong responses.
Table 1.5: Examples for character definitions depending on alphabet
GSM 03.38
character GSM character hex. value Corresponding ASCII character
A
SCII Esc
sequence Hex Esc sequence
Ö 5C \ \5C 5C 35 43
“ 22 “ \22 5C 32 32
ò 08 BSP \08 5C 30 38
@ 00 NULL \00 5C 30 30
CAUTION: Often, the editors of terminal programs do not recognize escape sequences. In this case, an escape
sequence will be handled as normal characters. The most common workaround to this problem is to write a
script which includes a decimal code instead of an escape sequence. This way you can write, for example, short
messages which may contain differently coded characters.