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

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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

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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

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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

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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.

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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.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 11
1.5.1 GSM Alphabet Tables and UCS2 Character Values
This section provides tables for the GSM 03.38 alphabet supported by the ME. Below any GSM character find the
corresponding two byte character value of the UCS2 alphabet.
Figure 1.1: Main character table of GSM 03.38 alphabet
1. This code is an escape to the following extension of the 7 bit default alphabet table.
2. This code is not a printable character and therefore not defined for the UCS2 alphabet. It shall be treated as the
accompanying control character.
3. As the standard GSM alphabet does not provide a backspace functionality, the Multi-Tech EDGE modem is
designed to use the GSM character 08 (hex 0x08) as backspace. This allows the user to easily erase the last
character when using an ASCII terminal. On the other hand, this solution requires entering the escape sequence
\08 for writing the "ò" character in GSM alphabet.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 12
Figure 1.2: Extension character table of GSM 03.38 alphabet
1. This code value is reserved for the extension to another extension table. On receipt of this code, a receiving
entity shall display a space until another extension table is defined.
2. This code represents the EURO currency symbol. The code value is the one used for the character ‘e’. Therefore
a receiving entity which is incapable of displaying the EURO currency symbol will display the character ‘e’
instead.
3. This code is defined as a Page Break character and may be used for example in compressed CBS messages.
Any mobile which does not understand the 7 bit default alphabet table extension mechanism will treat this
character as Line Feed.
In the event that an MS receives a code where a symbol is not represented in Figure 1.2, Extension character table of
GSM 03.38 alphabet the MS shall display the character shown in the main default 7 bit alphabet table (The Main
character table of GSM 03.38 alphabet).

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 13
1.5.2 UCS2 and GSM Data Coding and Conversion for SMS Text Mode
This section provides basic information on how to handle input and output character conversion for SMS text mode
and Remote-SAT if the internal (TA) and external (TE) character representation differ; e.g., if the Data Coding
Scheme and the TE character use different coding.
1.5.2.1 Implementing Output of SIM Data to Terminal (Direction TA to TE)
Used Character
Set DCS = 7 bit GSM DCS = 8 bit Data DCS = 16 bit UCS2
GSM Case 1
GSM (1:1)
Case 2
8 bit to IRA (1:2)
Case 3
UCS2 to IRA (2:4)
UCS2 Case 4
GSM to IRA (1:4)
Case 5
8 bit to IRA (1:4)
Case 6
UCS2 to IRA (2:4)
Note: The ratio of SIM bytes to output bytes is given in parentheses.
Case 1
Every GSM character is sent to TE as it is (8-bit value with highest bit set to zero).
Example: 47’H, 53’H, 4D’H 47’H, 53’H, 4D’H, displayed as “GSM”.
Case 2
Every data byte will is sent to TE as 2 IRA characters each representing a half byte.
Example: B8’H (184 decimal) 42’H, 38’H, displayed as “B8”.
Case 3
Every 16-bit UCS2 value is sent to TE as 4 IRA characters.
Example: C4xA7’H (50343 decimal) 43’H, 34’H, 41’H, 37’H, displayed as “C4A7”.
Problem: An odd number of bytes leads to an error because there are always two bytes needed for each USC2
character.
Case 4
Every GSM character is sent to TE as 4 IRA characters to show UCS2 in text mode.
Example: 41’H (“A”) 30’H, 30’H, 34’H, 31’H, displayed as “0041”.
Case 5
Every data byte is sent to TE as IRA representation of UCS2 (similar to case 4).
Example: B2’H 30’H, 30’H, 42’H, 32’H, displayed as “00B2”.
Case 6
Every 16-bit value is sent to TE as IRA representation of it. It is assumed that number of bytes is even.
Example: C3x46’H 43’H, 33’H, 34’H, 36’H, displayed as “C346”.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 14
1.5.2.2 Implementing Input of Terminal Data to SIM (Direction TE to TA)
Used Character
Set DCS = 7 bit GSM DCS = 8 bit Data DCS = 16 bit UCS2
GSM Case 1
GSM (1:1)
Case 2
IRA to 8 bit (2:1)
Case 3
IRA to 16 bit (4:2)
UCS2 Case 4
GSM to IRA (1:4)
Case 5
8 bit to IRA (1:4)
Case 6
UCS2 to IRA (2:4)
Note: The ratio between the number of input characters and bytes stored on the SIM is given in
parentheses.
Case 1
Every character is sent from TE to TA as GSM character (or ASCII with HyperTerminal).
Character value must be in range from 0 to 127 because of 7-bit GSM alphabet.
To reach maximum SMS text length of 160 characters in 140 bytes space characters will be compressed on SIM.
This must be set using the parameter <dcs> of AT+CSMP (add 64).
Example: “ABCDEFGH” typed is sent and stored uncompressed as 4142434445464748’H (stored
compressed as 41E19058341E91’H).
Case 2
Every data byte is sent to TA as 2 IRA characters.
Maximum text length is 280 IRA characters which will be converted into 140 bytes SMS binary user data.
Example: “C8” typed is sent as 43’H, 38’H stored as C8’H.
Case 3
Every 16-bit value is sent to TA as 4 IRA characters.
Maximum text length is 280 IRA characters which will be converted into 70 UCS2 characters (16-bit each).
Number of IRA characters must be a multiple of four because always 4 half bytes are needed for a 16-bit value.
Example: “D2C8” typed is sent as 44’H, 32’H, 43’H, 38’H stored as D2C8’H.
Case 4
Every GSM character is sent to TA as 4 IRA characters representing one UCS2 character.
Example: To store text “ABC” using UCS2 character set you have to type “004100420043”.
This is sent as 30’H,30’H,34’H,31’H, 30’H,30’H,34’H,32’H, 30’H,30’H,34’H,33’H detected as IRA
representation of 3 UCS2 characters, converted to GSM character set and stored as 41’H, 42’H, 43’H.
Maximum input is 640 IRA characters representing 160 UCS2 characters when compression is active. These are
converted to 160 GSM 7-bit characters.
Without compression only 140 GSM characters can be stored which are put in as 560 IRA characters.
Values of UCS2 characters must be smaller than 80’H (128 decimal) to be valid GSM characters.
Number of IRA characters must be a multiple of four. Problems:
•“41” ¨ Error, there are four IRA characters (two bytes) needed
•“0000” Error, not an UCS2 character
•“4142” Error, value of UCS2 character > 7F’H
•“008B” Error, value of UCS2 character > 7F’H
This affects the maximum input length of a string)
Case 5
Every UCS2 character is sent as 4 IRA characters and is converted into two 8-bit values. This means that the
first two characters have to be ‘00’.
Example: UCS2 character 009F’H typed as “009F” is sent as 30’H,30’H,39’H,46’H ¨ converted into 8-bit value
9F’H.
Maximum number of UCS2 characters is 140 which are represented by 560 IRA characters. Number of IRA
characters must be a multiple of four.
Case 6
Every UCS2 character is sent as 4 IRA characters each and is converted into a 16-bit value again.
Example: UCS2 character 9F3A’H typed as “9F3A” is sent as 39’H,46’H,33’H,41’H converted into 9F3A’H.
Maximum number of UCS2 characters is 70 which are represented by 280 IRA characters. Number of IRA
characters must be a multiple of four.
Invalid UCS2 values must be prevented.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 15
1.6 Serial Interface Flow Control
Flow control is essential to prevent loss of data or avoid errors when, in a data call, the sending device is transferring
data faster than the receiving side is ready to accept. When the receiving buffer reaches its capacity, the receiving
device should be capable to cause the sending device to pause until it catches up.
There are basically two approaches to regulate data flow: Software flow control and hardware flow control. The High
Watermark of the input/output buffer should be set to approximately 60% of the total buffer size. The Low Watermark
is recommended to be about 30%. The data flow should be stopped when the capacity rises close to the High
Watermark and resumed when it drops below the Low Watermark. The time required to cause stop and go results in
a hysteresis between the High and Low Watermarks.
1.6.1 Software Flow Control (XON/OFF Handshake)
Software flow control sends different characters to stop (XOFF, decimal 19) and resume (XON, decimal 17) data flow.
The only advantage of software flow control is that three wires would be sufficient on the serial interface.
1.6.2 Hardware Flow Control (RTS/CTS Handshake)
Hardware flow control sets or resets the RTS/CTS wires. This approach is faster and more reliable, and therefore,
the better choice. When the HWM is reached, CTS is set inactive. When the LWM is passed, CTS goes active again.
To achieve smooth data flow, ensure that the RTS/CTS lines are present on your application platform.
Configuring Hardware Flow Control
•Hardware flow control must be set on both sides: with AT\Q3 or AT+IFC in the ME and an equivalent RTS/CTS
handshake option in the host application.
•The default setting of the ME is AT\Q0 (no flow control) which must be altered to AT\Q3 (RTS/CTS hardware
handshake on). The setting is stored volatile and must be restored each time after rebooting the ME.
•AT\Q has no read command. To verify the current setting of AT\Q, simply check the settings of the active profile
with AT&V.
Buffer Design Considerations
•The serial interface (ASC0) uses two buffers, one for the uplink and one for the downlink. Each buffer has a
capacity of minimum 1024 bytes.
•Uplink direction (where ME is receiving data from host application):
CTS control is based on the filling level of the ME's receive buffer. When the application detects that CTS is
being deactivated it must instantly stop sending data to the ME's receive buffer. But still, after deactivation of
CTS, the receive buffer of the ME can accept another 512 bytes.
•Downlink direction (where ME is sending data to host application):
The transmit buffer of the ME can hold at least 1024 bytes. After deactivation of RTS the ME sends max. 2 more
bytes and then stops transferring data to the application.
The maximum time RTS can be kept inactive without losing data is determined by the buffer size and the
maximum possible over-the-air data rate. In any case, the local data rate between DCE and DTE (AT+IPR)
should be set to a value higher than the maximum possible over-the-air data rate.
•Buffer size recommended for the host application:
Just like the ME, the host application should include send and receive buffers for each serial interface. To handle
large amounts of data at high speed a buffer capacity of 1024 bytes is recommended. If the host application is
designed mainly for one direction (uplink or downlink) a lower buffer size will do for the direction where less data
is transferred.
In fact, the optimal size of the host application buffers is a matter of finding the balance between the amount of
data, data throughput, and reaction time of the application when handling the buffer, processor performance and
available memory. To give an example, a small buffer size (such as 256 bytes) increases the frequency of
deactivating RTS/CTS and the frequency of flushing the buffer, thus diminishing the efficiency of the application.
Also, please consider that RTS/CTS flow control cannot stop the data stream coming from the network, e.g.
in a GPRS or fax connection. So the lack of appropriate hardware flow control increases the risk of losing data
packets if, like in the case of UDP, the connection protocol has no or only minimum error handling functions.
Other network protocols are using high level flow control mechanisms. For example, to prevent loss of data
the TCP protocol uses retransmission algorithms.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 16
1.7 Communication between Customer Application and
Multi-Tech Wireless Modem
Leaving hardware flow control unconsidered the Customer Application (TE) is coupled with the Multi-Tech wireless
modem (ME) via a receive and a transmit line.
Since both lines are driven by independent devices, collisions may (and will) happen; i.e., while the TE issues an AT
command, the Multi-Tech wireless modem starts sending an URC. This will probably lead to the TE’s
misinterpretation of the URC being part of the AT command’s response.
To avoid this conflict the following measures must be taken:
•If an AT command is finished (with “OK” or “ERROR”) the TE shall always wait at least 100 milliseconds before
sending the next one.
This gives the Multi-Tech wireless modem the opportunity to transmit pending URCs and get necessary service.
Note that some AT commands may require more delay after “OK” or “ERROR” response, refer to the following
command specifications for details.
•The TE shall communicate with the Multi-Tech wireless modem using activated echo (ATE1); i.e., the Multi-Tech
wireless modem echoes characters received from the TE.
Hence, when the TE receives the echo of the first character “A” of the AT command just sent by itself it has
control both over the receive and the transmit paths.
1.8 Unsolicited Result Code Presentation
URC stands for Unsolicited Result Code and is a report message issued by the ME without being requested by the
TE; e.g., a URC is issued automatically when a certain event occurs. Hence, a URC is not issued as part of the
response related to an executed AT command.
Typical events leading to URCs are incoming calls (“RING”), waiting calls, received short messages, changes in
temperature, network registration etc.
A list of all URCs can be found in Section 20.7, Summary of Unsolicited Result Codes (URC).
To announce a pending URC transmission the ME will do the following:
•The ME activates its RING line (logic “1”) for one second; i.e., the line changes to physical “Low” level. This
allows the TE to stay in power saving mode until an ME-related event requests service. If several URCs occur
coincidentally or in quick succession, each URC triggers the RING line independently, although the line will not
be activated between each URC. As a result, the RING line may stay low for more than one second.
If an incoming call is answered within less than one second (with ATA or if auto answering is set to ATSO=1,
then the RING line will be deactivated earlier.
The “^SHUTDOWN” URC will not activate the RING line.
•If the AT command interface is busy a “BREAK” will be sent immediately but the URC will not be issued until the
line is free. This may happen if the URC is pending in the following cases:
∗During the processing of an AT command (i.e., the time after the TE echoes back the first character “A” of
an AT command just sent by itself until the ME responds with “OK” or “ERROR”).
∗During a data call.
Please note that AT command settings may be necessary to enable in-band signaling; e.g., refer to
AT+CMER or AT+CNMI.
For most of these messages, the ME needs to be configured whether or not to send a URC. Depending on the AT
command, the URC presentation mode can be saved to the user defined profile (see AT&W), or needs to be
activated every time you reboot the ME. Several URCs are not user definable, such as “^SYSSTART”, “^SYSSTART
<text>”, “^SHUTDOWN”.
If autobauding is enabled (as factory default mode or set with AT+IPR=0), URCs generated after restart will be output
with 57600 bps until the ME has detected the current bit rate. The URCs “^SYSSTART”, “^SYSSTART
<text>”, however, are not presented at all. For details please refer to Section 4.9.1, Autobauding. To avoid problems
we recommend to configure a fixed bit rate rather than using autobauding.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 17
1.9 Common PCN Handset Specification (CPHS)
The ME provides features to implement a device following the prerequisites of the Common PCN Handset
Specification (CPHS) Phase 2.
CPHS Feature Description/Remarks AT command
Alternate Line Service Using two phone numbers with one SIM card. AT^SALS
Voice Message Waiting
Indication
Indicate the receipt of a short message coded as Voice
Message Waiting Indicator as defined by the CPHS Phase 2
standard.
AT^SIND,
AT+CMER, indicators
“vmwait1” and “vmwait2”
Operator (Service provider)
name from SIM
Read specific Elementary Files (6F14h, 6F18h) from SIM. AT+CRSM
Network and Service Provider
Lock
Lock/Unlock an ME to specific HPLMN and service provider. AT+CLCK, (AT+CPIN)
Call Forwarding Get and set diverted call status. Access specific Elementary
File (6F13h) from SIM.
AT+CCFC, AT+CRSM
Customer Service Profile
(CSP)
Setting services and their menu entries depending on
customer profiles.
AT+CRSM
Information numbers Hierarchically structured service numbers phonebook on
SIM according to CPHS 4.2 (mandatory).
AT+CRSM
1.10 Errors and Messages
The command result codes “+CME ERROR: <err>” and “+CMS ERROR: <err>” indicate errors related to mobile
equipment or network functionality.
The format of <err> can be either numeric or verbose and is selectable via AT+CMEE.
A result error code terminates the execution of the command and prevents the execution of all remaining commands
that may follow on the same command line. If so, neither “ERROR” nor “OK” result codes are returned for these
commands. A 30 seconds timeout will deliver “ERROR” when the input of a command is not complete.
Using the wrong command syntax may result in errors: For example, using the execute command syntax although
the command has no execute format, causes “ERROR” to be returned. Likewise, using the write command syntax
although the command has no write format causes “+CME ERROR: <err>” to be returned.
See also:
• Section 2.5.1, Verbose and numeric result codes
• Section 2.12.1, CME/CMS Error Code Overview
• Section 3.4, AT+CEER

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 18
Chapter 2 – Configuration
Commands
The AT commands described in this chapter allow the external application to determine the modem’s behavior under
various conditions.
2.1 AT&F Set All Current Parameters to Manufacturer
Defaults
Description: AT&F sets all current parameters to the manufacturer defined profile. All defined GPRS
contexts which are not activated or not online will be “undefined” (see AT+CGDCONT).
Exec Command Syntax: AT&F[value]
Response: OK
Parameter Description:
<value>
0 Sets all TA parameters to manufacturer defaults.
Notes:
•List of parameters reset to manufacturer default can be found in Section 20.6, Factory Default Settings
Restorable with AT&F.
•In addition to the default profile, you can store an individual one with AT&W. To alternate between the two
profiles enter either ATZ (loads user profile) or AT&F (restores factory profile).
•Every ongoing or incoming call will be terminated.
2.2 AT&V Display Current Configuration
Description: AT&V returns the current parameter setting. The configuration varies depending on
whether or not PIN authentication has been done.
Exec Command Syntax: AT&V[value]
Response: Active Profile (See Section 2.2.1 AT&V responses)
OK
Parameter Description:
<Value>:
0 Profile number
Notes:
•The value of \Q (flow control) is also determined by the AT+IFC command. In case the value set by AT+IFC
cannot be represented by a \Q equivalent, \Q255 will be displayed.
•The parameters of AT^SMGO can only be displayed after the SMS data from the SIM have been read
successfully for the first time. Reading starts after successful SIM authentication has been performed, and may
take up to 30 seconds depending on the SIM used. While the read process is in progress, an attempt to read the
parameter will result in empty values.
•The parameter of AT+CSDH will only be displayed in SMS text mode, see AT+CMGF.

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Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 19
2.2.1 AT&V Responses
The following table shows different kinds of responses depending on whether or not the PIN is entered.
Table 2.1: Current configuration on ASC0 channel 1 (example)
PIN authentication done No PIN authentication
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0 \V1
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060 S8:000
S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+CRC: 0
+CMGF: 0
+CSDH: 0
+CNMI: 0,0,0,0,1
+IFC:3
+IFC:0,0
+ILRR: 0
+IPR: 115200
+CMEE: 2
^SMGO: 0,0
+CSMS: 0,1,1,1
^SACM: 0,”000000”,”000000”
^SLCC: 0
^SCKS: 0,1
^SSET:0
+CREG: 0,1
+CLIP: 0,2
+CAOC: 0
+COPS: 0,0,”operator”
+CGSMS: 3
OK
ACTIVE PROFILE:
E1 Q0 V1 X4 &C1 &D2 &S0 \Q0 \V1
S0:000 S3:013 S4:010 S5:008 S6:000 S7:060 S8:000
S10:002 S18:000
+CBST: 7,0,1
+CRLP: 61,61,78,6
+CR: 0
+FCLASS: 0
+IFC:3
+IFC:0,0
+ILRR: 0
+IPR: 115200
+CMEE: 2
^SCKS: 0,1
^SSET:0
OK
Notes: For MTCBA-E2-U, MTCBA-E2, MTSMC-E2: The AT&V command displays some values that are
stored on the SIM (SCMP and CSCA). If the SIM is not yet initialized when the AT&V command is used,
you may see the current profile, but at the end of that an ERROR message may display instead of OK.
2.3 AT&W Stores Current Configuration to User Defined
Profile
Description: AT&W stores the currently parameters to a user-defined profile in the non-volatile
memory.
Exec Command Syntax: AT&W[value]
Response: OK
ERROR / +CME ERROR <err>
Parameter Values:
<value>
0 Number of the profile
Notes:
•The user defined profile will be restored automatically after power-up. Use ATZ to restore user profile and AT&F
to restore factory settings. Until the first use of AT&W, ATZ works as AT&F.
•A list of parameters stored to the user profile can be found in Section 20.5, AT Command Settings Storable with
AT&W.

Chapter 2 – Configuration Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G) 20
2.4 ATQ Set Result Code Presentation Mode
Description: This parameter setting determines whether or not the TA transmits any result code to the
TE. Information text transmitted in response is not affected by this setting.
Store this parameter with the AT&W command.
Display this parameter with the AT&V command.
Exec Command Syntax: ATQ<n>
Response: If <n> = 0, then OK. Default
If <n> = 1, then (none).
Parameter Values:
<n>
0 DCE transmits result code. Default.
1 Result codes are suppressed and not transmitted
2.5 ATV Set Result Code Format Mode
Description: This command determines the contents of the header and trailer transmitted with AT
command result codes and information responses. Possible responses are described in
Section 2.5.1, Verbose and numeric result codes.
Store this parameter with the AT&W command.
Display this parameter with the AT&V command.
Exec Command Syntax: ATV<value>
Response: OK
ERROR
Parameter Value:
<value>
0 Information response: <text><CR><LF>
Short result code format: <numeric code><CR>
1 Information response: <CR><LF><text><CR><LF> Long result code format:
<CR><LF><verbose code><CR>. Default.
2.5.1 Verbose and Numeric Result Codes
Verbose format Numeric format Meaning
OK 0 Command executed, no errors
CONNECT 1 Link established
RING 2 Ring detected
NO CARRIER 3 Link not established or disconnected
ERROR 4 Invalid command or command line too long
NO DIALTONE 6 No dial tone, dialing impossible, wrong mode
BUSY 7 Remote station busy
CONNECT 2400/RLP 47 Link with 2400 bps and Radio Link Protocol
CONNECT 4800/RLP 48 Link with 4800 bps and Radio Link Protocol
CONNECT 9600/RLP 49 Link with 9600 bps and Radio Link Protocol
CONNECT 14400/RLP 50 Link with 14400 bps and Radio Link Protocol
ALERTING Alerting at called phone
DIALING Mobile phone is dialing