A 07/15/03 Initial release.
B 03/23/04 Add Values to each command. Add new commands.
C 04/22/04 Fix headers and footers. Some formatting changes.
D 09/30/04 Minor spelling and formatting changes.
E 08/25/05 Changes for Wavecom Rev. 1.37. Changed the definition of MIN.
F 11/09/05 RUIM is covered in this document; this sentence has been removed: “This document is
also intended for use in the North American market. SIM/RUIM and its related AT
commands are not documented here.” R-UIM is now documented.
G 01/26/06 New cover includes product list and trademark/registered trademark symbols. Added
MTCBA-C-IP to products covered in this manual. Updated definitions of SIM and R-UIM
in Chapter 1.
H 02/08/07 Added new model MTZPC-C.
I 05/14/07 Updated Technical Support contact list. Moved chapter covering Unsolicited Result
Codes to a later chapter (Chapter 21) in the manual instead of its previous position as
Chapter 3.
J 01/16/08 Updated Technical Support contact list again. Removed command +WMSN (Modem
Serial Number). Changed cover layout. Updated product name MMCModem.
Trademarks
SocketModem, MultiModem, Multi-Tech, and the Multi-Tech logo are registered trademarks of Multi-Tech Systems, Inc.
MMCModem is a trademark of Multi-Tech Systems, Inc.
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: 763-785-3500 or 800-328-9717
Fax: 763-785-9874
Internet Address: http://www.multitech.com
Technical Support
Country By Email By Phone
Europe, Middle East, Africa: support@multitech.co.uk (44) 118 959 7774
U.S., Canada, all others: support@multitech.com (800) 972-2439 or 1-763-717-5863
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 2
Scope of This Document ............................................................................................................................................9
Related References....................................................................................................................................................9
Terminology and Acronyms......................................................................................................................................10
Chapter 2 – AT Command Features ...........................................................................................................................13
Serial Interface Settings ...........................................................................................................................................13
Information Responses and Result Codes ...............................................................................................................13
Chapter 3 - General Commands .................................................................................................................................14
Attention AT ...........................................................................................................................................................14
Electronic Serial Number +CGSN ...........................................................................................................................14
Select TE Character Set +CSCS.............................................................................................................................15
Capabilities List +GCAP..........................................................................................................................................15
Repeat Last Command A/.......................................................................................................................................15
Set Phone Functionality +CFUN .............................................................................................................................16
Phone Activity Status +CPAS..................................................................................................................................16
Report Mobile Equipment Errors +CMEE................................................................................................................16
Keypad Control +CKPD ..........................................................................................................................................17
Ring Melody Playback +CRMP ...............................................................................................................................17
Subscriber Number +CNUM....................................................................................................................................18
Select Type of Address +CSTA...............................................................................................................................18
Answer a Call A.......................................................................................................................................................22
DTMF Start and Stop Continuous +WSDT, +WSDS..............................................................................................23
Redial Last Telephone Number DL .........................................................................................................................24
Automatic Dialing with DTR %Dn............................................................................................................................24
Single Numbering Scheme +CSNS.........................................................................................................................25
Microphone Gain +VGT...........................................................................................................................................26
Volume Gain Control +VGR ....................................................................................................................................26
Microphone Mute Control +CMUT...........................................................................................................................27
Side Tone Modification +SIDET ..............................................................................................................................28
Chapter 5 – Network Service Commands..................................................................................................................29
Signal Quality +CSQ ...............................................................................................................................................29
Band Preference +WBND .......................................................................................................................................30
Change NAM Selection +WNAM.............................................................................................................................32
Read Current NAM +WCNM ...................................................................................................................................32
Enter PIN +CPIN.....................................................................................................................................................35
Enter PIN2 +CPIN2 .................................................................................................................................................36
PIN Remaining Attempt Number +CPINC...............................................................................................................36
Select Message Service +CSMS ............................................................................................................................40
New Message Acknowledgement +CNMA..............................................................................................................40
Show Text Mode Parameters +CSDH.....................................................................................................................41
New Message Indication +CNMI .............................................................................................................................42
List Message +CMGL..............................................................................................................................................44
Write Message to Memory +CMGW........................................................................................................................46
Send Message From Storage +CMSS ....................................................................................................................47
Message Status Modification +WMSC ....................................................................................................................48
Change SMS Status +WUSS..................................................................................................................................49
Set SMS Compose Language and Encoding +WSCL.............................................................................................50
Set Timestamp of MT SMS +WSTM .......................................................................................................................50
Calling Line Identification Restriction +CLIR ...........................................................................................................52
Calling Line Identification Presentation +CLIP ........................................................................................................52
Send Flash to Base Station +WFSH .......................................................................................................................53
List Current Call State +CLCC ................................................................................................................................54
Chapter 9 – Data Commands......................................................................................................................................55
Using AT Commands During a Data Connection .....................................................................................................55
Cellular Result Codes +CRC...................................................................................................................................56
DTE-DCE Local Rate Reporting +ILRR ..................................................................................................................56
V.42 bis Data Compression +DS.............................................................................................................................57
V.42 bis Data Compression Report +DR.................................................................................................................57
DTE-DCE Character Framing +ICF.........................................................................................................................58
DTE-DCE Local Flow Control +IFC.........................................................................................................................59
Set DCD Signal &C .................................................................................................................................................59
Set DTR Signal &D..................................................................................................................................................60
Set DSR Signal &S..................................................................................................................................................60
Back to Online Mode O ...........................................................................................................................................60
Result Code Suppression Q....................................................................................................................................60
DCE Response Format V........................................................................................................................................61
Request Identification Information I.........................................................................................................................62
Save Configuration &W ...........................................................................................................................................62
Chapter 11 – Phone Book Commands.......................................................................................................................63
IP Server Address +WMPC......................................................................................................................................73
Chapter 13 - Specific AT Commands.........................................................................................................................74
Request Model Identification +WGMM....................................................................................................................74
Cell Environment and RxLev Indication +CCED .....................................................................................................75
Analog Digital Converters Measurements +ADC ....................................................................................................77
Mobile Equipment Event Reporting +CMER ...........................................................................................................77
Read GPIO Value +WIOR.......................................................................................................................................78
Write GPIO Value +WIOW ......................................................................................................................................78
Play Tone +WTONE................................................................................................................................................78
Play DTMF Tone +WDTMF.....................................................................................................................................79
Hardware Version +WHWV.....................................................................................................................................79
Select Voice Gain +WSVG......................................................................................................................................80
Status Request +WSTR ..........................................................................................................................................80
Ring Indicator Mode +WRIM ...................................................................................................................................81
Software Version +WSSW ......................................................................................................................................82
Custom Character Set Tables +WCCS ...................................................................................................................83
Change Default Player +WCDP ..............................................................................................................................84
Set Standard Tone +WSST.....................................................................................................................................85
Set Voice Privacy Level +WPRV.............................................................................................................................85
Configure LED Indicator +CLED .............................................................................................................................87
SIM ToolKit Get Information +STGI.........................................................................................................................93
Unsolicited Result: SIM ToolKit Control Response +STCR)....................................................................................96
SIM ToolKit Give Response +STGR .......................................................................................................................96
Chapter 15 – Provisioning AT Commands.................................................................................................................99
Service Programming Code +WSPC ....................................................................................................................100
Mobile Directory Number +WMDN........................................................................................................................100
Set IMSI +WIMI.....................................................................................................................................................100
SID and NID +WSID..............................................................................................................................................101
Access Overload Class +WAOC...........................................................................................................................101
Slot Cycle Index +WSCI........................................................................................................................................101
Download PRL +DPRL...........................................................................................................................................105
Service Programming Example..............................................................................................................................106
Chapter 16 – Extended AT Commands in IS707.3...................................................................................................107
Remote Async/Fax Command X ...........................................................................................................................107
Reset to Default Configuration Z0 .........................................................................................................................107
Select Tone Dialing T ............................................................................................................................................107
Select Pulse Dialing P ...........................................................................................................................................108
Basic S-Registers S ..............................................................................................................................................108
Error Control Operation +EB .................................................................................................................................109
Numeric Parameter Control +EFCS ......................................................................................................................109
Error Control Report +ER......................................................................................................................................109
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 5
Table of Contents
Error Control Selection +ES ..................................................................................................................................110
Error Control Selective Repeat +ESR ...................................................................................................................110
Error Control Selection +ETBM.............................................................................................................................111
Request Product Serial Number Identification +GSN............................................................................................112
Request Global Object Identification +GOI............................................................................................................112
Modulation Automode Control +MA ......................................................................................................................113
Modulation Reporting Control +MR.......................................................................................................................113
V.18 Reporting Control +MV18R...........................................................................................................................114
Query Service +CAD.............................................................................................................................................115
U
Interface Data Compression Reporting +CDR.................................................................................................116
m
U
Interface Data Compression +CDS .................................................................................................................116
m
Set Rm Interface Protocol +CRM ..........................................................................................................................116
Command State Inactivity Timer +CQD ................................................................................................................117
Mobile Station IP Address +CMIP .........................................................................................................................117
Base Station IP Address +CBIP............................................................................................................................118
Serving System +CSS...........................................................................................................................................118
Chapter 18 – Qualcomm Defined AT Commands for CDMA Operation ................................................................125
Transition to Diagnostics Monitor $QCDMG .........................................................................................................125
Quick Net Connect $QCQNC................................................................................................................................125
Protocol Revision in Use $QCPREV .....................................................................................................................125
Originate M-to-M Packet Data Call $QCMTOM ....................................................................................................126
Dump IP Protocol Statistics $QCIPD.....................................................................................................................127
Reset IP Protocol Statistics $QCIPR.....................................................................................................................127
Set Data Service Option $QCSO ..........................................................................................................................128
Clear Mobile Error Log $QCCLR...........................................................................................................................128
Set DM Baud Rate $QCDMR................................................................................................................................129
Set Medium Data Rate $QCMDR..........................................................................................................................130
R-SCH IP Selection $QCMIP ................................................................................................................................131
Current Active Profile $QCMIPEP.........................................................................................................................132
Return Profile Information $QCMIPGETP.............................................................................................................133
Set NAI for Active Profile $QCMIPNAI ..................................................................................................................133
Set Reverse Tunneling $QCMIPRT ......................................................................................................................133
Set MN-AAA Shared Secrets in Active Profile $QCMIPMASS..............................................................................134
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 6
Table of Contents
Set MN-HA Shared Secrets in Active Profile $QCMIPMHSS................................................................................134
Set MN-AAA Shared Secrets in HEX Active Profile $QCMIPMASSX ...................................................................134
Set MN-HA Shared Secrets in HEX Active Profile $QCMIPMHSSX ....................................................................135
Set MN-AAA Shared Secrets in Active Profile $QCMIPMASPI.............................................................................135
Set MN-HA Shared Secrets in Active Profile $QCMIPMHSPI...............................................................................135
Set Primary HA IP Address $QCMIPPHA.............................................................................................................136
Set Secondary HA IP Address $QCMIPSHA ........................................................................................................136
Set Home HA IP Address $QCMIPHA ..................................................................................................................136
Chapter 19 – TCP/IP App AT Commands................................................................................................................. 137
Open Socket +WOSK ...........................................................................................................................................138
Close Socket +WCSK ...........................................................................................................................................139
Transmit Socket Data +WSTX ..............................................................................................................................139
Read Receive Data +WSRX .................................................................................................................................140
Display Connection Status +WGSS ......................................................................................................................141
Configure Receive Data Mode +WCRX ................................................................................................................142
Force Dormant Mode +WFDM ..............................................................................................................................142
IP Address Lookup +WDNS..................................................................................................................................143
Display IP Address +WIPC....................................................................................................................................143
PPP Session Status +WPPP.................................................................................................................................143
Socket State Change +WSKS...............................................................................................................................144
Socket Data Transmission Status +WSTX............................................................................................................144
Socket Data Transmission Error +WSTE ..............................................................................................................145
Received Socket Data +WSRX.............................................................................................................................145
Socket Data Error +WSRE....................................................................................................................................145
Dormant Mode Status Change +WDOR ...............................................................................................................146
DNS Lookup Indication +WDNS............................................................................................................................146
Chapter 20 – Reference Information ........................................................................................................................147
MS Error Result Code : +CME ERROR: <err>.......................................................................................................147
Message Service Failure Result Code: +CMS ERROR: <err>...............................................................................148
Specific Error Result Codes ...................................................................................................................................148
Final Result Codes.................................................................................................................................................149
Intermediate Result Codes.....................................................................................................................................149
gpsOne Error Result Code: +WPDER: <code>......................................................................................................150
Codes for SMS Status Report (+CDS and +CMGR) ..............................................................................................152
AT Commands Supported When SIM Card Removed ...........................................................................................153
AT Commands for AMPS Operation ......................................................................................................................153
TCP App Socket Status Events..............................................................................................................................154
TCP App DNS Server Codes .................................................................................................................................154
TCP App Restricted AT Commands.......................................................................................................................155
Commands Over DM Port (MuxLite) ......................................................................................................................157
Chapter 21 – Unsolicited AT Result Codes..............................................................................................................159
SMS Status Report Indication Directly Displayed +CDS .......................................................................................160
SMS Status Report Indication Stored in Memory +CDSI ......................................................................................160
Key Press or Release +CKEV...............................................................................................................................160
Caller ID Presentation +CLIP ................................................................................................................................161
General Indicator +WIND ......................................................................................................................................165
Current NAM Change +WNAM .............................................................................................................................167
Voice Mail Indicator +WVMI ..................................................................................................................................168
SMS Message Storage Full +WMGF ....................................................................................................................168
Power Save +WSPS .............................................................................................................................................168
Position Determination Start Session Result +1...................................................................................................169
Position Determination Error +WPDER................................................................................................................170
Download PRL Status +DPRL..............................................................................................................................171
Chapter 22 – AT Command Examples .....................................................................................................................172
General Examples..................................................................................................................................................172
Short Message Examples ......................................................................................................................................174
Send Class 2 Fax...................................................................................................................................................176
Chapter 23 – Verizon® Specific AT Commands ......................................................................................................180
SMS Status Report Indication Directly Displayed +CDS .......................................................................................180
List Message +CMGL............................................................................................................................................183
Write Message to Memory +CMGW......................................................................................................................185
Service Programming Code +WSPC ....................................................................................................................185
Verizon® System Selection +WVSS .....................................................................................................................186
Programming In Progress +WOT1 ........................................................................................................................186
NAM Download OK +WOTN .................................................................................................................................187
MDM Download OK +WOTM ................................................................................................................................187
MSI Download OK +WOTI ....................................................................................................................................187
PRL Download OK +WOTP ..................................................................................................................................187
Position Determination Lock Level +WPLCK ........................................................................................................188
Chapter 24 – Sprint® Specific AT Commands.........................................................................................................189
SMS Status Report Indication Directly Displayed +CDS .......................................................................................189
Set Phone Functionality +CFUN ...........................................................................................................................189
Signal Quality +CSQ .............................................................................................................................................190
Mobile Directory Number +WMDN........................................................................................................................191
Serving System +CSS...........................................................................................................................................191
Packet Zone Identifier +PZID ................................................................................................................................192
WIOTA Connection Control +WIOTA ....................................................................................................................193
Sprint® System Selection +WSSS........................................................................................................................193
Preparing Data Services +WOAP .........................................................................................................................193
Display PRI Checksum +WSUM ...........................................................................................................................194
Reset MIN and MDN to Factory Defaults +WRMM ...............................................................................................194
Index ...........................................................................................................................................................................196
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 8
Chapter 1 – Introduction
Chapter 1 – Introduction
The AT command set is one of the main interfaces for the modem to interact with an external application layer. CDMA AT
commands are defined in TIA/EIA/IS707.3. However, as the wireless applications increase, TIA/EIA/IS707.3 is not sufficient. In
addition, a lot of GSM applications already exist and GSM customers would like to maintain the same interface in order to
make no or minimum changes to the applications to be used with CDMA modem. To meet the all these needs, this CDMA AT
command set is designed to cover the following:
1. IS707.3 AT commands;
2. GSM 07.07 when applicable;
3. GSM 07.05 when applicable,
4. ITU-T v25 when applicable;
5. Proprietary AT set;
6. Customer specific AT commands;
7. Qualcomm defined AT commands.
Please note that in several instances, the GSM 7.07 and 7.05 specifications could not be followed because of fundamental
differences between CDMA and GSM call processing behaviors. In these cases, minimal changes were made to the GSMrelated commands.
Scope of This Document
This document describes CDMA AT commands, their syntax, responses, and result codes. It serves as the reference for
wireless application development based on the CDMA modem and for its integration and testing. The intended audience is
expected to be familiar with CDMA data services protocol and AT modem commands.
Related References
This interface specification is based on the following recommendations or standards:
1. ETSI GSM 07.05: Digital cellular telecommunications system (Phase 2); Use of DTE-DCE interface for Short
Message Service (SMS) and Cell Broadcast Service (CBS)
2. ETSI GSM 07.07: Digital cellular telecommunications system (Phase 2); AT command set for GSM Mobile Equipment
(ME)
3. ITU-T Recommendation V.25 ter: Serial asynchronous automatic dialing and control
4. ETSI GSM 03.40: Digital cellular telecommunications system (Phase 2); Technical implementation of the Short
Message Service (SMS) Point-to-Point (PP)
5. ETSI GSM 03.38: Digital cellular telecommunications system (Phase 2); Alphabets and language-specific information
6. ETSI GSM 04.80: Digital cellular telecommunications system (Phase 2): Mobile radio interface layer 3,
Supplementary service specification, Formats and coding
7. TIA/EIA/IS-707.3: Data Service Options for Wideband Spread Spectrum Systems: AT Command Processing and the
Rm Interface
8. IS-131: Data Transmissions Systems and Equipment – Extensions to Asynchronous Dialing and Control.
9. TIA/EIA-592: Asynchronous Facsimile DCE Control Standard – Service Class 2.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 9
Chapter 1 – Introduction
Terminology and Acronyms
This is an alphabetical list of terms and acronyms used throughout this document and the CDMA cellular industry.
2G Second Generation. All digital cellular systems developed to replace the first analog cellular systems. (GSM
and CDMA).
3G Third Generation. Next generation digital cellular systems designed to have high-speed data access and
higher voice capacity (CDMA & CDMA2000).
Advanced Forward Link Trilateration. A type of handset-based position location technology. GPS satellites
AFLT
are not used to determine location. To determine location using AFLT, the phone takes measurements of
signals from nearby cellular base stations (towers) and reports the time/distance readings back to the
network, which are then used to triangulate an approximate location of the handset. In general, at least three
surrounding base stations are required to get an optimal position fix.
CBM Cell Broadcast Message. An SMS message that is broadcast to all mobiles on the network.
CDMA Code Division Multiple Access. CDMA is a spread spectrum, digital wireless modulation scheme for cellular
communications systems. It has approximately 3 times the voice capacity of GSM networks. See IS-95, IS95B, IS-2000.
cdmaONE cdmaOne is a brand name, trademarked and reserved for the exclusive use of the CDMA Development
Group. cdmaOne describes a complete wireless system that incorporates the IS-95 CDMA air interface, the
ANSI-41 network standard for switch interconnection and many other standards that make up a complete
wireless system.
cdma2000 cdma2000 is a third generation (3G) wireless system. It contains a significant increase in voice capacity and
high-speed data rates. It is backward compatible with IS-95B and IS-95A.
DCE Data Communications Equipment. This is the modem in the traditional serial communication paradigm of a
computer connected via two modems to another computer.
DTE Data Terminal Equipment. This is the computer in the traditional serial communication paradigm of a
computer connected via two modems to another computer.
DTMF Dual Tone Multi-Frequency: A pre-defined set of tones sent over the air when keys are pressed on the
keypad.
Handset (Path) The audio path (microphone & speaker) that connects to a traditional hand held telephone receiver, usually
dual balanced electrical lines.
Headset (Path) The audio path (microphone & speaker) that connects to an earpiece with a microphone, usually single
electrical lines.
IMSI International Mobile Station IS. This is an international 15 digital phone number that uniquely identifies a
mobile. IMSI=MCC + MNC + MIN.
IOTA Internet Over The Air.
IS-95 The first CDMA standard published by Qualcomm in 1993. It is a TIA standard for North American cellular
systems based on CDMA. It is widely deployed in North America and Asia.
IS-95A A CDMA standard with improved voice quality. IS-95A defines what generally is known as cdmaOne, which
supports voice and 14.4 Kbps data rates. This is a worldwide standard.
IS-95B This CDMA standard contains Medium Data Rate capabilities and bug fixes for system access failures. It is
considered a 2.5G system. It supports data rates up to 115 Kbps.
IS-2000 The first 3G CDMA standard based on IS-95B. It contains a significant increase in voice capacity and high-
speed data rates. It is backward compatible with IS-95B and IS-95A.
IS-707 TIA/EIA/IS-707 describes data services available on wideband spread spectrum systems. It is organized into
a series of related recommendations, some of which address functions common to all CDMA data services
and others that describe a specific data service.
IWF
: Interworking Function. A process that acts as a gateway or interface between two or more communication
components. For example, an IWF is used to interface wireless CDMA networks and wire line PSTN or
packet-data networks.
LAPM:
Link Access Procedure for Modems. An error control protocol defined in the ITU-T recommendations V.42.
Like the MNP protocols, LAPM uses cyclic redundancy checking (CRC) and retransmission of corrupted
data (ARQ) to ensure data reliability.
MCC Mobile Country Code. A pre-defined 30-digital number that represents a country in the IMSI.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 10
Chapter 1 – Introduction
MDN Mobile Data Number or the mobile phone number.
MIN Mobile Identification Number or mobile user account number.
MNC Mobile Network Code. A pre-defined 2-digital number that represents a sub-network in the IMSI (usually set
to “00”).
MO Mobile Originated. An action (usually a call) that is first started from the phone. An outgoing call or SMS.
MS Mobile Station. The term MS is commonly used to represent the phone or mobile.
MT Mobile Terminated: An action that is initiated from a land based network. An incoming call or SMS.
MSM Mobile Station Modem.
NAM Number Assignment Modem. The NAM is collection of internal parameters that define a working phone for a
given network (phone number, access parameters, etc.).
NID Network ID. The NID is an identification number that represents geographic location of a common coverage
area; but is a subset of the SID, usually a neighborhood in a large city. NID is usually not used and is set to
zero. Also see SID.
NV-RAM Non-Volatile Random Access Memory, NV-RAM is a data storage device that does not lose its data when
power is turned off.
OTAPA Over The Air Parameter Administration. An automatic update in internal software parameters (PRL for
example) by means of a specially defined CDMA data call that is mobile terminated (MT).
OTASP Over The Air Service Programming. An automatic update in internal software parameters PRL; for example,
by means of a specially defined CDMA data call that is mobile terminated (MT).
PD
Position Determination. Process by which the mobile GPS position is obtained.
PDU A GSM SMS standard where any type of binary data can be transported via an SMS message. In the CDMA
system, the PDU mode is not supported; instead, the Unicode format message is supported.
PN Offset Pseudorandom Noise Offset: In a CDMA network the PN offset is a variable time delay offset of a repeating
random noise generator that is used to distinguish individual sectors of a base station.
P-REV The CDMA revision of the mobile or base station.
PRI Product Release Instructions. Carrier specific information required for activation on a CDMA network.
PRL Preferred Roaming List. The PRL is a collection of frequencies, SIDs and NIDs that the call processing
software uses to search for approved and unapproved CDMA networks. The PRL is loaded into the phone
and is saved in NV-RAM.
PSTN Public Switching Telephone Network. The traditional telephone network.
RF Radio Frequency.
RSSI Receive Signal Strength Indicator: This parameter represents the total RF received signal power from the
base station(s) the mobile sees..
R-UIM Removable User Identity Module – The R-UIM is similar to a subscriber identity module (SIM), but
designed for networks other than GSM (global system for mobile telecommunications), such as CDMA.
The R-UIM card contains user information and data features on a removable smart card about the size of a
postage stamp. It is a dual-mode solution that can store both GSM provisioning and CDMA provisioning on a
single card. When used with a GSM handset, the R-UIM operates like a GSM SIM.
SID System ID. The SID is an identification number that represents geographic locations of a common coverage
area, usually a large city. Also see NID.
SIM Subscriber Identity Module. A SIM card is a portable memory chip. The SIM holds personal identity
information, cell phone number, phone book, text messages, and other data.
SMS Short Messaging Service; A supplement service that is capable of sending and receiving short length text
messages to/from the mobile.
SREJ:
Selective Reject. An optional feature of V.42 which enhances data throughput on noisy connections. As data
blocks are sent out, the remote side acknowledges only after an agreed upon number of blocks are received
(window size). If any block is received bad, the sender is notified of the rejected bad block so it can be
retransmitted.
TA/TE Terminal Application/Terminal Equipment. This is the end “device” (combination of hardware and software)
that communicates with a modem via a serial link. In this context, it is the device (PDA/Computer) connected
to the WISMO Quik. Also see DTE.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 11
TON/NP Type of Number/Numbering Plan Identification.
V24-V25 A data compression algorithm.
V42 A data compression algorithm.
Chapter 1 – Introduction
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 12
Chapter 2 – At Command Features
Chapter 2 – AT Command
Features
Serial Interface Settings
A module serial interface is set with the following default values (factory settings):
115,200bps
8 bits data
1 stop bit
no parity
RTS/CTS flow control.
Note: Some models may have a different value for the default baud rate.
The +IPR, +IFC and +ICF commands can be used to change these settings, if required. Changes made using these
commands become effective immediately following the transmission of the successful command result (OK).
Command Line
Commands always start with AT (which means ATtention) and finish with a <CR> character.
For example:
ATI3<cr> Display the model and software revision information.
AT+CGSN<cr> Display the electronic serial number (ESN).
AT+CMEE=1<cr> Enable extended AT command results.
ATD5551212<cr> Initiate a voice call.
Information Responses and Result Codes
Command responses start and end with <cr><lf>, unless the ATV0 (DCE response format) and the ATQ1 (result code
suppression) commands have been entered.
• If the command has been performed successfully, an OK is returned following any command-related output.
• If command syntax is incorrect, an ERROR string is returned.
• If extended error reports are enabled (+CMEE), the +CME ERROR: <Err> or +CMS ERROR: <SmsErr> strings
are returned with different error codes. Refer to the appendix for a definition of error codes and their meanings.
• If the command line has been performed successfully, an OK string is returned.
• In the following examples <CR> and <CR><LF> are intentionally omitted.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 13
Chapter 3 – General Commands
Chapter 3 - General Commands
Attention AT
Description: This two character command prefix is used to alert the module software that a command has been entered
for processing. This prefix must be included in all commands unless otherwise noted. When entered alone,
the module responds with OK to signify it is ready to process commands.
Syntax: Command syntax: AT
Command Possible responses
AT
Note: Module in online mode.
+++
Note: Reset module.
AT
Note: Module in offline mode.
Note: No response returned.
Note: No response returned.
OK
Note: Ready to process commands.
Request Revision Identification +CGMR
Description: This command is used to display the operating software version.
Syntax: Command syntax: AT+CGMR
Command Possible Responses
AT+CGMR
Note: Get software version
+CGMR: S/W VER: WISMOQ WQ1.1 Mar 20 2002 17:30:00
OK
Note: Software Version WISMOQ, revision WQ1.1 generated on the
March 20th, 2002 at 17:30:00
Electronic Serial Number +CGSN
Description:This command allows the user application to get the ESN of the product. The ESN value is displayed in
hexadecimal format.
Syntax: Command syntax: AT+CGSN
Command Possible Responses
AT+CGSN
Note: Get the ESN
+CGSN: FE7A7704
OK
Note: ESN read from NV
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 14
Chapter 3 – General Commands
Select TE Character Set +CSCS
Description:This command informs the MS which character set is in use by the TE. The MS uses this information to
convert each character of entered or displayed text data. The character set is used for send, read or write of
short messages.
Values: <Character Set>
“CDMA” CDMA default (ASCII) character set.
“CUST” Custom character set.
Syntax: Command syntax: AT+CSCS=<Character Set>
Command Possible Responses
AT+CSCS=”CDMA”
Note: CDMA default alphabet
AT+CSCS?
Note: Custom character set
AT+CSCS=?
Note: Get possible values
OK
Note: Command valid
+CSCS: “CDMA”
OK
Note: Command valid
+CSCS: ("CDMA","CUST")
OK
Note: Possible values
Request IMSI +CIMI
Description:This command is used to read and identify the IMSI (International Mobile Subscriber Identity) of the modem.
The PIN may need to be entered using the CPIN command before reading the IMSI.
Syntax: Command syntax: AT+CIMI
Command Possible Responses
AT+CIMI
Note: Read the IMSI
+CIMI: 310008585551212
OK
Note: IMSI value (15 digits)
Capabilities List +GCAP
Description: This command gets the complete list of capabilities.
Syntax: Command syntax: AT+GCAP
Command Possible Responses
AT+GCAP
Note: Get capabilities list
+GCAP: +CGSM, +CIS707-A, +MS, +ES, +DS, +FCLASS
OK
Repeat Last Command A/
Description: This command repeats the previous command. Only the A/ command itself cannot be repeated.
Syntax: Command syntax: A/
Command Possible Responses
A/
Note: Repeat last command
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 15
Chapter 3 – General Commands
Phone Offline +CPOF
Description:This command sends all CDMA software stack tasks offline. AT command can still be received, however,
there is no RF functionality. The AT+CFUN=0 command is equivalent to +CPOF.
Syntax: Command syntax: AT+CPOF
Command Possible Responses
AT+CPOF
Note: Stop CDMA stack
+CPOF:
OK Note: Command valid
Set Phone Functionality +CFUN
Description:This command selects the mobile station’s level of functionality. AT+CFUN=0 is equivalent to AT+CPOF The AT+CFUN=1 (by default, AT+CFUN will act the same as AT+CFUN=1) command restarts the entire
CDMA stack and CDMA functionality: a complete software reset is performed. In addition, the OK
response will be sent at the last baud rate defined by the +IPR command.
Values: <functionality level>
0 Set the phone to OFFLINE mode.
1 Set the phone to ONLINE mode and resets.
AT+CFUN?
Note: Ask for current functionality level
AT+CFUN=0
Note: Set phone offline
AT+CFUN=1
Note: Set phone ONLINE. A software reset is performed.
+CFUN: 1
OK
Note: Full functionality
OK
Note: Command valid
OK
Note: Command valid
Phone Activity Status +CPAS
Description: This command returns the activity status of the mobile equipment.
Values: <pas>
0 ready (allow commands from TA/TE)
1 unavailable (does not allow commands)
2 unknown
3 ringing (ringer is active)
4 call in progress
5 asleep (low functionality)
6 corrupted RF calibration values (checksum mismatch)
Syntax: Command syntax: AT+CPAS
Command Possible Responses
AT+CPAS
Note: Current activity status
+CPAS: <pas>
OK
Report Mobile Equipment Errors +CMEE
Description:This command disables or enables the use of the “+CME ERROR : <xxx>” or “+CMS ERROR :<xxx>” result
code instead of simply “ERROR”. See Chapter 20 "MS Error Result Codes" for +CME ERROR result codes
description and Chapter 20 "Message Service Failure Result Codes" for +CMS ERROR result codes.
AT+CMEE=0
Note: Disable MS error reports, use only « ERROR »
AT+CMEE=1
Note: Enable «+CME ERROR: <xxx>» or «+CMS ERROR: <xxx>»
OK
OK
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 16
Chapter 3 – General Commands
Keypad Control +CKPD
Description:This command emulates the MS keypad by sending each keystroke as a character in a <keys> string. If emulation fails, a +CME ERROR: <err> is returned. If emulation succeeds, the result depends on the
CDMA sequence activated: <keys>: string of the following characters (0-9,*,#).
Syntax: Command syntax: AT+CKPD=<keys>
Command Possible Responses
AT+CKPD=”*#21#” Note: Key sequence allowed OK
AT+CKPD=1234 Note: Sequence not allowed +CME ERROR 3
Clock Management +CCLK
Description: This command is used to set or get the current date and time of the MS real-time clock.
String format for date/time is: “yy/MM/dd,hh:mm:ss”.
Valid years are 98 (for 1998) to 97 (for 2097). The seconds field is not mandatory.
Default date/time is “98/01/01,00:00:00” (January, 1998 / midnight).
Syntax: Command syntax: AT+CCLK=<date and time string>
Command Possible Responses
AT+CCLK=”00/06/09,17:33:00”
Note: set date to June 9th, 2000, and
time to 5:33pm
AT+CCLK=”00/13/13,12:00:00”
Note: Incorrect month entered
AT+CCLK?
Note: Get current date and time
OK or ERROR
Note: Date/Time stored – ERROR returned when RTC not
enabled
+CME ERROR 3
+CCLK: “00/06/09,17:34:23”
Note: current date is June 9, 2000 current time is 5:34:23
pm – network time if available, otherwise calculated based
on previous network time if available, otherwise ERROR.
Ring Melody Playback +CRMP
Description:This command causes a melody to be played. The specified melody will playback in an endless loop until
stopped with another +CRMP command. All melodies are manufacturer defined. Up to ten manufacturerdefined melodies may be available for individual playback.
Note: Looped melodies must be stopped by a +CRMP command with the <index> field set to 0 (example:
+CRMP=0,,,0).
When the +CRMP command is performed, the <volume> parameter overwrites the <sound level> value of
the +CRSL command.
Values:<call type> A value must be specified; however, the value is currently ignored.0 Reserved
1 Reserved
2 Reserved
3 Reserved
<volume>
0Min volume (mute)
1 Default volume
4 Max volume
<type> A value must be specified if <index> is specified; however, the value is currently ignored. 0Manufacturer Defined (default)
<index>
0Stop Melody Playback
1-10 Melody ID for voice/data/fax call type (default:1)
Syntax: Command syntax: AT+CRMP=<call type>[,<volume>,<type>,<index>]
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 17
...
Command Possible Responses
AT+CRMP=0,2,0,2
Note: Play voice call melody index 2 with volume level 2.
AT+CRMP=0,,,0
Note: Stop the melody.
AT+CRMP=?
Note: supported parameters
OK
Note: Melody Playback.
OK
Note: The melody is stopped.
+CRMP: (0-3),(0-4),(0-0),(0-10)
OK
Chapter 3 – General Commands
Ringer Sound Level +CRSL
Description: This command is used to set/get the sound level of the ringer on incoming calls.
Values: <sound level>
0 Min volume (muted)
1 Default volume (default)
4 Max volume
Syntax: Command syntax: AT+CRSL=<sound Level>
Command Possible Responses
AT+CRSL=0
Note: Set volume to Min (muted).
AT+CRSL=4
Note: Set volume to Max.
AT+CRSL?
Note: Get current ringer sound level
AT+CRSL=4
Note: Supported parameters
OK
Note: Current ring playing is muted.
OK
Note: Current ring playing with Max. volume.
CRSL:4
OK
Note: Current level is 4
CRSL: (0-4)
OK
Subscriber Number +CNUM
Description:This command is used to return the subscriber MSISDN. If the subscriber has different MSISDNs for
different services, each MSISDN is returned on a separate line.
Values: <alphax> optional alphanumeric string associated with <numberx>
<numberx> string type phone number with format as specified by <typex>
<typex> type of address byte in integer format – only supports 129
AT+CNUM=8585551212
Note: Set module phone number in RUIM software
releases. Entry of the SPC is not required.
Note: For RUIM software releases, this command provides a means for setting the phone number without the need to have
previously entered the SPC (+WSPC command). The value for <number> can be up to 15 digits. The use of this command
does not effect the IMSI.
+CNUM :“Phone”,”8585551212”,129
Note: MSISDNs
OK
OK
Note: New number set.
Select Type of Address +CSTA
Description: This command is used to select the type of phone address to use.
Values: <typex> type of address byte in integer format – only supports 129
Syntax: Command syntax: AT+CSTA=<typex>
Command Possible Responses
AT+CSTA?
Note: Get type of address
AT+CSTA=?
Note: Get supported address types
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 18
+CSTA: 129
Note: Local Number format
+CSTA: (129-129)
OK
Chapter 3 – General Commands
View Modem Timers +WTMR
Description:This command is used to read the modem’s accumulated internal timers. These timers include Uptime, Call
Time, Call Count, and Last Call Time. Uptime is the number of seconds the modem has been running since
boot-up. Call Time is the total number of seconds the modem has been in a call since manufacture (Voice,
Data, Fax, OTASP, and CDMA Test Calls; but SMS is not included). Call count is the total number of calls
made since manufacture. Last Call Time returns the time of the most recent call in seconds. It is not stored
in NV and is initialized to zero on boot-up. The range of all returned timer items is 0 to 4294967295 (136
years).
Values: <Uptime> seconds since modem boot-up
<Call Time> total call seconds since modem manufacture (excluding SMS)
<Call Count> total calls made since modem manufacture <Last Call Time> time of the most recent call in seconds
+WTMR: 1029, 45670,289, 85
OK
Note: Uptime = 1029 seconds
Call Time = 45670 seconds
Call Count = 289 calls
Last Call Time = 85 seconds
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 19
Chapter 4 – Call Control Commands
Chapter 4 – Call Control
Commands
Dial Command D
Description:The ATD command is used to originate a voice, data or fax call. The dial command also controls
supplementary services.
For a data or a fax call, the application sends the following ASCII string to the product: ATD<nb> where <nb> is the destination phone number.
Note: ATD<nb> is followed by PPP negotiation.
For a voice call, the application sends the following ASCII string to the product:
ATD<nb>; where <nb> is the dialing string or destination phone number, followed a semicolon “;”. The
dialing string may only contain characters “0-9”,”#”,”*” only. Note that some countries may have specific
numbering rules for their CDMA handset numbering.
The response to the ATD command is one of the following:
Verbose Result
Code
OK 0 Command executed (voice)
CONNECT <speed> 10,11,12,13,14,15 If the call succeeds, for data calls only, <speed> takes
BUSY 7 If the called party is already in communication,
NO ANSWER 8 If no hang up is detected after a fixed network time-out
NO CARRIER 3 Call setup failed or remote user release.
NO DIALTONE 6 Voice call with missing “;”
Direct Dial Syntax: Command syntax: ATD<nb>[;]
Command Possible Responses
ATD18005551212;
Note: Attempt a voice call.
ATD5551212;
Note: Example of a failed voice call attempt.
Dialing from a phonebook entry (stored in the RUIM card or NV) can be performed with the following commands:
ATD><index>; Call <index> from the +CPBS selected phonebook.
ATD>”Bill”; Call “Bill” from the +CPBS selected phonebook.
ATD><mem><index>; <mem> is a +CPBS=? listed phonebook and <index> is a valid location within the
Note: A semicolon must be used at the end of the AT command to signal phonebook dialing. Otherwise, the
command will result in an error.
Numeric Code (with
ATV0 set)
phonebook
Description
the value negotiated by the product.
OK
Note: Command executed
+WORG:18005551212
Note: Voice call origination sent to Base Station with dial
string “18005551212”.
+WCNT: 9
Note: Call Connected, CDMA traffic channel established
with service option 9. You can now hear audio of the calling
party’s phone ringing. However, this event does not mean
the other calling party has answered.
OK
Note: Command executed
+WORG:5551212
Note: Voice call origination sent to Base Station with dialing
string “5551212”.
+WEND: 3
Note: Call Attempt failed/ended. Reason 3, signal faded.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 20
Phonebook Syntax:Command syntax: ATD><index>[;]
ATD>[<mem>]<name>[;]
ATD>[<mem>]<index>[;]
Command Possible Responses
AT+CPBS?
Note: Which phonebook is selected.
ATD>5;
Note: Dial location #5 from ME phonebook.
ATD>SM202;
Note: Dial location 202 from the SM(RUIM
card) phonebook.
ATD>”Bill”;
Note: This command is NOT valid for MC,
RC, and LD phonebooks as they are
supported in CDMA networks
Note: When the FD facility is enabled, only the numbers in the FDN phonebook can be called. For example,
if “014629” is present in the FD phonebook, the command ATD014629; will be successful. Data calls are not
allowed when the FD facility is enabled.
Chapter 4 – Call Control Commands
+CPBS: ME,11,100
OK
Note: Command executed
OK
Note: Command executed
+WORG:5551212
Note: Voice call origination sent to Base Station with
dialing string “5551212”.
+WEND: 3
Note: Call Attempt failed/ended. Reason 3, signal faded.
OK
Note: Command executed
+WORG:5551212
Note: Voice call origination sent to Base Station with
dialing string “5551212”.
+WEND: 3
Note: Call Attempt failed/ended. Reason 3, signal faded.
OK
Note: Command executed
+WORG:5551212
Hang-Up Command H
Description:The ATH (or ATH0) command is used by the application to disconnect the remote user. In the case of
multiple calls, all calls are released (active, on-hold and waiting calls).
The specific ATH1 command has been appended to disconnect the current outgoing call, only in dialing or
alerting state (i.e., ATH1 can be used only after the ATD command, and before its terminal response (OK,
NO CARRIER, ...). It can be useful in the case of multiple calls.
Syntax: Command syntax: ATH
Command Possible Responses
ATH
Note: Ask for disconnection
ATH1
Note: Ask for outgoing call
disconnection
OK
+WEND: 10
Note: Every call, if any, is released
ERROR
+WEND: 10
Note: Outgoing call, if any, is released
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 21
Chapter 4 – Call Control Commands
Answer a Call A
Description: When the product receives a call, it sets the RingInd signal and sends the ASCII “RING” or “+CRING:
<type>” string to the application (+CRING if the cellular result code +CRC is enabled). Then it waits for the
application to accept the call with the ATA command.
Syntax: Command syntax: ATA
Command Possible Responses
RING
Note: Incoming call
ATA
Note: Answer to this incoming call
ATH
Note: Disconnect call
+WANS:0
+WCNT: 10
Note: Call accepted
OK
+WEND: 10
Note: Call disconnected
Remote Disconnection
Description:A message is used by the product to inform the application that the remote user has released an active call.
The product sends +WEND: <result code> to the application. The DCD signal may be set based upon the
AT&C2 setting for packet calls. See Chapter 21,Unsolicited AT Result Codes, for more information on the
+WEND command.
Extended Error Report +CEER
Description: This command gives the cause of any general call processing error or malfunction. See Chapter 20,
Extended Error Report.
Syntax: Command syntax: AT+CEER
Command Possible Responses
ATD18005551212;
ATD1234567;
Note: Outgoing voice call while already in a call
AT+CEER
AT+CEER
Note: Ask for reason of release
OK
+WORG:18005551212
+WCNT:3
ERROR
Note: Call setup failure
+CEER: Error 2
OK
Note: Operation not allowed when call in progress
+CEER : Error <x>
OK
Note: <x>is the cause information element values
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 22
Chapter 4 – Call Control Commands
DTMF Signals +VTD, +VTS
+VTD
Description:The product enables the user application to send DTMF tones over the CDMA network. This command is
used to define tone duration (the default value is 0,0). To define this duration, the application uses:
AT+VTD=<on>,<off>.
AT+VTD=4,3
Note: To define 300 ms on tone duration and 200 ms off tone duration.
AT+VTD=?
Note: Display valid parameter ranges.
OK
Note: Command valid
+VTD: (0-5), (0-3)
OK
+VTS
Description: The product supports the ability of the user application to send burst DTMF tones over the CDMA network.
This command enables the transmission of burst DTMF tones. To transmit DTMF tones (only when there is
an active call), the application uses: AT+VTS=<Tone> where <Tone> is in {0-9,*,#}.
Syntax: Command syntax: AT+VTS=<Tone>
Command Possible Responses
AT+VTS=# OK
Note: Command valid
AT+VTS=11 OK
AT+VTS=4 OK
Informative Example:To send tone sequence 13#, the application sends: AT+VTS=13#
DTMF Start and Stop Continuous +WSDT, +WSDS
Description: Starts and stops a continuous DTMF tone while in a call state (conversation).
Values: <X>: (0-9, #,*)
Syntax: Command syntax: AT+WSDT=<X>
Command Possible Responses
AT+WSDT=2 OK
AT+WSDS OK
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 23
Starts DTMF tone
Stops DTMF tone
Chapter 4 – Call Control Commands
Redial Last Telephone Number DL
Description:This command is used by the application to redial the last number used in an ATD commanded voice call.
The ATDL command causes the last voice call number to be redialed. The phonebook is not referenced for
the redial. Data call numbers are not supported by this command; only voice call numbers.
Syntax: Command syntax: ATDL
Command Possible Responses
ATDL
Note: Redial last number
OK
+WORG: 8585551212
Note: Last call was a voice call. Command valid
Automatic Dialing with DTR %Dn
Description:This command enables and disables the automatic sending of the short message (SMS) stored in the first
location. The number is dialed and then short message is sent when DTR OFF switches ON.
Values:<n> (0-2) Enable or disable automatic message transmission or number dialing.
Informs the product that the number is a voice rather than a fax or data number.
AT%D0 Disables automatic DTR number dialing / message transmission.
AT%D1 Currently not implemented.
AT%D2 Activates automatic DTR message transmission if DTR switches from OFF to ON.
Syntax: Command syntax: AT%D<n>
Command Possible Responses
AT%D2
Note: Activates DTR short message sending
OK
Note: Command has been executed
Automatic Answer S0
Description: This S0 (zero) register parameter determines and controls the product automatic answering mode.
Values: <value> (0-255)
0 No automatic answer.
1 – 255 Answers after the specified number of rings.
Syntax: Command syntax: ATS0=<value>
Command Possible Responses
ATS0=2
Note: Automatic answer after 2 rings
ATS0?
Note: Current value
ATS0=0
Note: No automatic answer
Other S-parameter registers are implemented.
OK
002
OK
Note: always 3 characters padded with zeros
OK
Note: Command valid
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 24
Chapter 4 – Call Control Commands
Incoming Call Bearer +CICB
Description:This specific command is used to set the type of incoming calls when no incoming bearer is given (see
+CSNS). The setting the +CICB command affects the current value of +CSNS.
Values: <mode>
0 Data
1 Fax
2 Speech
3 Data once (10 minute timeout)
4 Fax once (10 minute timeout)
Syntax: Command syntax: AT+CICB=<mode>
Command Possible Responses
AT+CICB=1
Note: If no incoming bearer, force a fax call
AT+CICB=2
Note: If no incoming bearer, force a voice call
AT+CICB?
Note: Interrogate value
AT+CICB=?
Note: Test command
OK
Note: Command accepted
OK
Note: Command accepted
+CICB: 2
OK
Note: Default incoming bearer: voice call
+CICB: (0-4)
OK
Note: Speech, data or fax default incoming bearer
Single Numbering Scheme +CSNS
Description:This command selects the bearer to be used when an MT single numbering scheme call is set up (see
+CICB, these commands are the same).
Note: The setting the +CSNS command affects the current value of +CICB.
Values: <mode>
0 Data
1 Fax
2 Speech
3 Data once (10 minute timeout)
4 Fax once (10 minute timeout)
Syntax: Command syntax: AT+CSNS
Command Possible Responses
AT+CSNS=0
Note: Force a data call
AT+CSNS=2
Note: Force a voice call
AT+CSNS?
Note: Interrogate value
AT+CSNS=?
Note: Test command
OK
Note: Command accepted
OK
Note: Command accepted
+CSNS: 2
OK
Note: Default incoming bearer: voice call
+CSNS: (0-4)
OK
Note: Voice, data or fax default incoming bearer
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 25
Microphone Gain +VGT
Description: This command sets the microphone gain of the current audio path.
Values: <MicGain> value to Microphone relative gain:
AT+VGT Value Microphone Relative Gain Step (dB)
0 -2
1 +6
2 +8
3 +16
Syntax: Command syntax: AT+VGT=<MicGain>
Command Possible Responses
AT+VGT=2 OK
Note: Command valid
AT+VGT?
Note: Interrogate value
AT+VGT=?
Note: Test command
+VGT: 2
OK
Note: Current value
+VGT : (0-3)
OK
Note: Possible values
Chapter 4 – Call Control Commands
Volume Gain Control +VGR
Description: This command is used by the application to tune the receive gain of the speaker. If the modem is in the Idle
state, it will generate an audible tone at the selected volume.
Values: <RGain> value to Speaker relative gain:
AT+VGR Value Speaker Relative Gain Step (dB)
0 Mute
1 -23
2 -17
3 -11
4 -5
Syntax: Command syntax: AT+VGR=<Rgain>
Command Possible Resp onses
AT+VGR=2 OK
Note: Command valid
AT+VGR?
Note: Interrogate value
AT+VGR=?
Note: Test command
+VGR: 2
OK
Note: Current value
+VGR : (0-4)
OK
Note: Possible values; default: 3
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 26
Chapter 4 – Call Control Commands
Microphone Mute Control +CMUT
Description:This command is used to mute the microphone input on the product (for the active microphone set with the
+SPEAKER command). This command is only allowed during a call.
Values: <mode>
0 Microphone mute off (default).
1 Microphone mute on.
Syntax: Command syntax: AT+CMUT=<mode>
Command Possible Responses
AT+CMUT=?
Note: Test command
AT+CMUT?
Note: Ask for current value
AT+CMUT=1
Note: Mute ON (call active)
AT+CMUT?
Note: Ask for current value
AT+CMUT=0
Note: Mute OFF (call not active)
+CMUT : (0-1)
OK Note: Enable / disable mute
+CMUT : 0
OK Note: Current value is OFF
OK
Note: Command valid
+CMUT : 1
OK Note: Mute is active (call active)
+CME ERROR: 3
Note: Command not valid
Speaker & Microphone Selection +SPEAKER
Description:This command is used to select and activate a speaker/microphone audio path. The module provides two
audio paths. An audio path is functional only with appropriate module external hardware.
Values: <ActiveSpkMic >
0: HEADSET - Audio path corresponding to SPK_2/MIC_2.
1: HANDSET - Audio path corresponding to SPK_1/MIC_1. (Default)
Description:This command is used to enable, disable or configure the Echo Cancellation functions for voice calls (in
rooms, in cars, etc.). The +SPEAKER function automatically sets echo cancellation based upon handset or
headset choice and this command allows non-standard operation.
Values: <mode>
0 Vocoder Echo Cancellation Off
1 Ear Seal Echo Cancellation
2 Head Set Echo Cancellation
3 AEC
4 Speaker Echo Cancellation for car kit operation
5 Default Echo Cancellation for current path settings
Syntax: Command syntax: AT+ECHO= <mode>
Command Possible Responses
AT+ECHO?
Note: Read current settings
AT+ECHO=0
Note: Set Echo Cancellation Off
AT+ECHO=1
Note: Set Echo Cancellation to Ear Seal
AT+ECHO=2
Note: Set Echo Cancellation to Headset
AT+ECHO=4
Note: Set Echo Cancellation to Handset
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 27
+ECHO: 0
OK
OK
OK
OK
OK
Chapter 4 – Call Control Commands
Side Tone Modification +SIDET
Description:This command is used to set the level of audio feedback in the speaker (microphone feedback in the
speaker).
Values: <val1>
0 Sidetone is disabled
1 Sidetone is enabled
<val2>
0 No side tone
1 Handset Sidetone levels
2 Headset Sidetone levels
3 Max Sidetone level
Syntax: Command syntax: AT+SIDET=<val1>,<val2>
Command Possible Respon ses
AT+SIDET=1,0 OK
Note: Command valid
AT+SIDET?
Note: Current value
+SIDET: 1,0
OK
Note: Command valid
Initialize Voice Parameters +VIP
Description: This command allows voice parameters to be restored from NV memory.
Values: Gain controls are restored (+VGT and +VGR)
Voice path selection is restored (+SPEAKER)
Echo cancellation is restored (+ECHO)
Sidetone values are restored (+SIDET)
Syntax: Command syntax: AT+VIP
Command Possible Respon ses
AT+VIP OK
Note: Command valid
TTY Mode +WTTY
Description:This command enables TTY mode on the headset audio path. The modem must be in a voice call to set this
command, and when the call ends it goes back to standard audio mode.
Syntax: Command syntax: AT+WTTY
Command Possible Responses
AT+WTTY OK
Note: Command valid
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 28
Chapter 5 – Network Service Commands
Chapter 5 – Network Service
Commands
Signal Quality +CSQ
Description:This command is used to ascertain the received signal strength indication (<rssi>) and the channel frame
error rate (<fer>).
Note: See Chapter 24 for Sprint® specific version of this command.
Values: <rssi> The lowest value is 0 and the highest value is 31.
0 = 110dBm, 31 = -75dBm. 1.09375dBm per step.
Note: Certain models use a range other than 0 – 31.
10-31 Sufficient ranges.
0-9 Weak or insufficient
99 No signal.
<fer>
99 Not known or not detectable. Currently always returns 99.
Syntax: Command syntax: AT+CSQ
Command Possible Responses
AT+CSQ+CSQ: <rssi>,<fer>
OK
Note: <rssi> and <fer> as defined above
Mode Preference +COPS
Description:The Mode Preference of a CDMA modem governs the basic system acquisition behavior of the MS in
conjunction with the PRL (Preferring Roaming List). It’s important to note that the PRL takes precedence
over mode preference when guiding the phone to a band or system. The PRL must allow a particular band
first, before the mode preference can take effect. In other words, a mode preference change is simply a
request; the PRL decides whether or not to allow it. After execution of the +COPS command, an unsolicited
+COPS: <mode> will follow soon to confirm the new mode selection, but not in all cases. See Unsolicited
Result Codes in Chapter 21. All changes to +COPS are automatically saved in NV RAM.
Note 1: AMPS selection is available only in modems that support AMPS mode.
Note2: Refer to Chapter 20 for AT commands that are applicable to AMPS operation.
Note 3: This command is not available in Sprint®. and Verizon. software versions.
Note 4: CDMA Only (<mode> 1) is the only available mode in RUIM software versions. An attempt to select
any other mode in RUIM software versions will result in an error return.
Values: The parameter values are the following ones:
<mode>
0 Automatic.
1 CDMA Only.
2 CDMA or AMPS only.
3 Analog only.
<term>
0 Permanent – this mode persists until another +COPS command is issued
1 Power cycle – this mode persists until power cycle is performed
Note: AT+COPS by itself is a short-hand equivalent to AT+COPS=0,0.
Syntax on next page.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 29
Syntax: Command syntax: AT+COPS=<mode>,<term>
Command Possible Responses
AT+COPS?
Note: Ask for current Mode
Preference
AT+COPS=? +COPS: (0-3),(0-1)
AT+COPS=0,0
Note: Ask for Automatic mode
AT+COPS=1,1
Note: Ask for CDMA Only mode
AT+COPS=2,0
Note: Ask for CDMA or AMPS only
mode
AT+COPS=3,0
Note: Ask for Analog only mode
+COPS: 0,0
OK
Note: Automatic mode, use PRL order, Permanent
OK
Note: Modes: Automatic, CDMA Only, CDMA or AMPS
only; Term: Permanent, Power Cycle.
OK
+COPS: 0,0
Note: Unsolicited +COPS result confirms Automatic
mode, Permanent term is requested.
OK
+COPS: 1,1
Note: Unsolicited +COPS result confirms CDMA Only
mode, Power Cycle term is requested.
OK
+COPS: 2,0
Note: Unsolicited +COPS result confirms CDMA or
AMPS only mode, Permanent term is requested.
OK
+COPS: 3,0
Note: Unsolicited +COPS result confirms Analog only
mode, Permanent term is requested.
Chapter 5 – Network Service Commands
Band Preference +WBND
Description:The Band Preference of a CDMA modem governs the basic system acquisition behavior of the MS in
conjunction with the mode preference (+COPS) and the PRL (Preferring Roaming List). It’s important to note
that the PRL takes precedence over band preference when guiding the phone to a band. The PRL must
allow a particular band first, before the band preference can take effect. In other words, a band preference
change is simply a request; the PRL decides whether or not to allow it. If the setting is accepted by the MS,
the value will be written to non-volatile RAM and persist after a power-cycle.
Note 1: This command is not available in Sprint® and Verizon software versions.
Note 2: <band> 1 (PCS) is not available in RUIM software versions.
Values:The parameter values are the following ones: <band>
0 Any
1 PCS
2 Cellular A or B
3 Cellular A
4 Cellular B
Syntax: Command syntax: AT+WBND=<band>
Command Possible Responses
AT+WBND?
Note: Ask for current Band Preference
AT+WBND=? +WBND: (0-4)
AT+WBND=0
Note: Allow Any Band
+WBND: 0
OK
Note: Any
OK
Note: Any, PCS, Cell, Cell A, Cell B
OK
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J) 30
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