AT Commands Interface Guide GSM 900, 1900 Developer Rev A

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User Manual: GSM 900, GSM 1900

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AT Commands
GSM Reference Guide

Wireless Modem Family

Interface Guide

AT Commands Interface User Guide

GSM AT Commands Reference Guide
Products: Wireless Modem Family, including MTCBA-G-F1/F2, MTMMC-G-F1/F2, and MTSMC-G-F1/F2
PN S000293A, Revision A
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 © 2003, by Multi-Tech
Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof
and specifically disclaims 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

Initial release.

07/15/03

Trademarks
The Multi-Tech logo is a trademark of Multi-Tech Systems, Inc.

Multi-Tech Systems, Inc. PN S000293A

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AT Commands Interface User Guide

Contents
Chapter 1 - Introduction ...............................................................................................................................4
Chapter 2 - AT commands Features ...........................................................................................................5
Chapter 3 General be haviors ......................................................................................................................6
Chapter 4 - General Commands ..................................................................................................................8
Chapter 5 - Call Control commands..........................................................................................................17
Chapter 6 - Network service commands...................................................................................................30
Chapter 7 - Security commands ................................................................................................................38
Chapter 8 - Phonebook commands...........................................................................................................45
Chapter 9 - Short Messages commands...................................................................................................56
Chapter 10 - Supplementary Services Commands..................................................................................74
Chapter 11 - Data Commands ....................................................................................................................88
Chapter 12 - Fax Commands......................................................................................................................96
Chapter 13 - Fax Class 2 Commands.....................................................................................................100
Chapter 14 - V24-V25 commands ............................................................................................................107
Chapter 15 - Specific AT commands.......................................................................................................116
Chapter 16 - SIM TOOLKIT .......................................................................................................................157
Chapter 17 - GPRS commands ................................................................................................................172
Chapter 18 - Other AT commands...........................................................................................................196
Appendix A: Tables...................................................................................................................................197
Appendix B: Data / Commands multiplexing protocol..........................................................................219
APPENDIX C: AT Command Examples...................................................................................................221
APPENDIX D: ME SIM ToolKit Support...................................................................................................224
APPENDIX E: Structure of TERMINAL PROFILE ...................................................................................226
APPENDIX F: Command Type and Next Action Indicator. ...................................................................229
APPENDIX G: Coding of Alpha fields in the SIM for UCS2...................................................................230
APPENDIX H: Specification of Power Down Control via RS232 ..........................................................232
APPENDIX I: Conditions for command execution and dependence to SIM .......................................233

Multi-Tech Systems, Inc. PN S000293A

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Chapter 1 – Introduction

CHAPTER 1 - INTRODUCTION
Scope of this document
This document describes the AT-command based messages exchanged between an application
and the MULTI-TECH products in order to manage GSM related events or services.

Related documents
This interface specification is based on the following recommendations:
[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

Definitions
The words, “Mobile Station” (MS) or “Mobile Equipment” (ME) are used for mobile terminals
supporting GSM services.
A call from a GSM mobile station to the PSTN is called a “mobile originated call” (MOC) or
“outgoing call”, and a call from a fixed network to a GSM mobile station is called a “mobile
terminated call” (MTC) or “incoming call”.
In this document, the word “product” refers to any Multi-Tech product supporting the AT
commands interface.

Multi-Tech Systems, Inc. PN S000293A

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Chapter 2 – AT Commands Features

CHAPTER 2 - AT COMMANDS FEATURES
Multi-Tech line settings
A serial link handler is set with the following default values (factory settings): autobaud, 8 bits
data, 1 stop bit, no parity, RTS/CTS flow control. Please use the +IPR, +IFC and +ICF
commands to change these settings.

Command line
Commands always start with AT (which means ATtention) and finish with a  character.

Information responses and result codes
Responses start and end with , except for the ATV0 DCE response format) and the
ATQ1 (result code suppression) commands.

·

If command syntax is incorrect, an ERROR string is returned.

·

If command syntax is correct but with some incorrect parameters, the +CME ERROR:
 or +CMS ERROR:  strings are returned with different error codes.

·

If the command line has been performed successfully, an OK string is returned.

In some cases, such as “AT+CPIN?” or (unsolicited) incoming events, the product does not
return the OK string as a response.
In the following examples  and  are intentionally omitted.

Multi-Tech Systems, Inc. PN S000293A

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Chapter 3– General Behaviors

CHAPTER 3 GENERAL BE HAVIORS
SIM Insertion, SIM Removal
SIM card Insertion and Removal procedures are supported. There are software functions relying
on positive reading of the hardware SIM detect pin. This pin state (open/closed) is permanently
monitored.
When the SIM detect pin indicates that a card is present in the SIM connector, the product tries
to set up a logical SIM session. The logical SIM session will be set up or not depending on
whether the detected card is a SIM Card or not. The AT+CPIN? command delivers the following
responses:

·

If the SIM detect pin indicates “absent”, the response to AT+CPIN? is “+CME ERROR 10”
(SIM not inserted).

·

If the SIM detect pin indicates “present”, and the inserted Card is a SIM Card, the response to AT+CPIN? is “+CPIN: xxx” depending on SIM PIN state.

·

If the SIM detect pin indicates “present”, and the inserted Card is not a SIM Card, the
response to AT+CPIN? is CME ERROR 10.

·

These last two states are not given immediately due to background initialization. Between
the hardware SIM detect pin indicating “present” and the previous results the AT+CPIN?
sends “+CME ERROR: 515” (Please wait, init in progress).

When the SIM detect pin indicates card absence, and if a SIM Card was previously inserted, an
IMSI detach procedure is performed, all user data is removed from the product (Phonebooks,
SMS etc.). The product then switches to emergency mode.

Multi-Tech Systems, Inc. PN S000293A

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Chapter 3– General Behaviors

Background initialization
After entering the PIN (Personal Identification Number), some SIM user data files are loaded into
the product (Phonebooks, SMS status, etc.). Please be aware that it might take some time to
read a large phonebook.
The AT+CPIN? command response comes just after the PIN is checked. After this response
user data is loaded (in background). This means that some data may not be available just after
PIN entry is confirmed by ’OK’. The reading of phonebooks will then be refused by “+CME
ERROR: 515” or “+CMS ERROR: 515” meaning, “Please wait, service is not available, init in
progress”.
This type of answer may be sent by the product at several points:

·

when trying to execute another AT command before the previous one is completed
(before response),

·

when switching from ADN to FDN (or FDN to ADN) and trying to read the relevant
phonebook immediately,

·

when asking for +CPIN? status immediately after SIM insertion and before the product
has determined if the inserted card is a valid SIM Card.

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Chapter 5– Call Control Commands

CHAPTER 4 - GENERAL COMMANDS
Manufacturer identification +CGMI
Description:
This command gives the manufacturer identification.

Syntax:
Command syntax:

AT+CGMI

Command
AT+CGMI

Possible responses
WAVECOM MODEM
OK
Note: Command valid, Wavecom modem

Note: Get manufacturer identification

Request model identification +CGMM
Description:
This command gets the supported frequency bands. With multi-band products the response may
be a combination of different bands.

Syntax:
Command syntax:

AT+CGMM

Command
AT+CGMM
Note: Get hardware version

Possible responses
900P
OK
Note: GSM 900 MHz primary band. Other possible answers:
“900E” (extended band), “1800” (DCS), “1900” (PCS) or
“MULTIBAND”

Request revision identification +CGMR
Description:
This command gets the revised software version.

Syntax:
Command syntax:

AT+CGMR

Command
AT+CGMR
Note: Get software version

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Possible responses
310_G250.51 806216 032199 17:04
OK
Note: Software release 3.10, revision 51
st
generated on the 21 of March 1999

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Chapter 5– Call Control Commands

Product Serial Number +CGSN
Description:
This command allows the user application to get the IMEI (International Mobile Equipment
Identity) of the product.

Syntax:
Command syntax:

AT+CGSN

Command

Possible responses

AT+CGSN

012345678901234
OK
Note: IMEI read from EEPROM
+CME ERROR: 22
Note: IMEI not found in EEPROM

Note: Get the IMEI
AT+CGSN
Note: Get the IMEI

Select TE character set +CSCS
Description:
This command informs the ME which character set is used by the TE. The ME can convert each
character of entered or displayed strings. This is used to send, read or write short messages.
See also +WPCS for the phonebooks’ character sets.

Syntax:
Command syntax:

AT+CSCS=

Command
AT+CSCS=”GSM”
Note: GSM default alphabet
AT+CSCS=”PCCP437”
Note: PC character set code page 437
AT+CSCS=?
Note: Get possible values

Possible responses
OK
Note: Command valid
OK
Note: Command valid
+CSCS: ("GSM","PCCP437","CUSTOM","HEX")
OK
Note: Possible values

Defined values:

“GSM”
GSM default alphabet.
“PCCP437” PC character set code page 437.
“CUSTOM” User defined character set (cf. +WCCS command).
“HEX”
Hexadecimal mode. No character set used ; the user can read or write
hexadecimal values.

Multi-Tech Systems, Inc. PN S000293A

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Chapter 5– Call Control Commands

Wavecom Phonebook Character Set +WPCS
Description:
This command informs the ME which character set is used by the TE for the phonebooks. The
ME can convert each character of entered or displayed strings. This is used to read or write
phonebook entries. See also +CSCS for the short messages character sets.

Syntax:
Command syntax:

AT+WPCS=

Command
AT+WPCS=”TRANSPARENT”
Note: Transparent mode
AT+WPCS=”CUSTOM”
Note: Custom character set
AT+WPCS=?
Note: Get possible values

Possible responses
OK
Note: Command valid
OK
Note: Command valid
+WPCS: ("TRANSPARENT","HEX","CUSTOM")
OK
Note: Possible values

Defined values:

“TRANSPARENT” Transparent mode. The strings are displayed and entered as they are
stored in SIM or in ME.
“CUSTOM”
User defined character set (cf. +WCCS command).
“HEX”
Hexadecimal mode. No character set used ; the user can read or write
hexadecimal values.

Request IMSI +CIMI
Description:
This command reads and identifies the IMSI (International Mobile Subscriber Identity) of the SIM
card. The PIN may need to be entered before reading the IMSI.

Syntax
Command syntax:

AT+CIMI

Command
AT+CIMI
Note: Read the IMSI

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Possible responses
208200120320598
Note: IMSI value (15 digits), starting with MCC (3
digits) / MNC (2 digits, 3 for PCS 1900)

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Chapter 5– Call Control Commands

Card Identification +CCID
Description:
This command orders the product to read the EF-CCID file on the SIM card.

Syntax:
Command syntax:

AT+CCID

Command

Possible responses

AT+CCID
Note: Get card ID
AT+CCID?
Note: Get current value

+CCID: “123456789AB111213141”
Note: EF-CCID is present, hexadecimal format
+ CCID: “123456789AB111213141”
Note: Same result as +CCID

AT+CCID= ?
Note: Get possible value

OK
Note: No parameter but this command is valid

If there is no EF-CCID file present on the SIM, the +CCID answer will not be sent, but the OK
message will be returned.

Capabilities list +GCAP
Description:
This command gets the complete list of capabilities.

Syntax:
Command syntax:

AT+GCAP

Command
AT+GCAP
Note: Get capabilities list

Possible responses
+GCAP: +CGSM +FCLASS
OK
Note: Supports GSM and FAX commands

Repeat last command A/
Description:
This command repeats the previous command. Only the A/ command itself cannot be repeated.

Syntax:
Command syntax:

A/
Command
A/
Note: Repeat last command

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Possible responses

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Chapter 5– Call Control Commands

Power off +CPOF
Description:
This specific command stops the GSM software stack as well as the hardware layer. The
AT+CFUN=0 command is equivalent to +CPOF.

Syntax:
Command syntax:

AT+CPOF

Command
AT+CPOF
Note: Stop GSM stack

Possible responses
OK
Note: Command valid

Set phone functionality +CFUN
Description:
This command selects the mobile station’s level of functionality. When the application wants to
stop the product with a power off, or if the application wants to force the product to execute an
IMSI DETACH procedure, then it must send: AT+CFUN=0 (equivalent to AT+CPOF). This
command executes an IMSI DETACH and makes a backup copy of some internal parameters in
SIM and in EEPROM. The SIM card cannot then be accessed. If the mobile equipment is not
powered off by the application after this command has been sent, a re-start command
(AT+CFUN=1) will have to issued to restart the whole GSM registration process. If the mobile
equipment is turned off after this command, then a power on will automatically restart the whole
GSM process. The AT+CFUN=1 command restarts the entire GSM stack and GSM functionality:
a complete software reset is performed. All parameters are reset to their previous values if
AT&W was not used. If you write entries in the phonebook (+CPBW) and then reset the product
directly (AT+CFUN=1, with no previous AT+CFUN=0 command), some entries may not be
written (the SIM task does not have enough time to write entries in the SIM card). In addition, the
OK response will be sent at the last baud rate defined by the +IPR command. With the
autobauding mode the response can be at a different baud rate, it is therefore preferable to save
the defined baud rate with AT&W before directly sending the AT+CFUN=1 command.

Syntax:
Command syntax:

AT+CFUN=

Command
AT+CFUN?
Note: Ask for current functionality level
AT+CFUN=0
Note: Set minimum functionality, IMSI detach procedure
AT+CFUN=1
Note: Set the full functionality mode with a complete
software reset

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Possible responses
+CFUN: 1
OK
Note: Full functionality
OK
Note: Command valid
OK
Note: Command valid

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Chapter 5– Call Control Commands

Phone activity status +CPAS
Description:
This command returns the activity status of the mobile equipment.

Syntax:
Command syntax:

AT+CPAS
Command
AT+CPAS
Note: Current activity status

Possible responses
+CPAS: 
OK

Defined values:

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)

Report Mobile Equipment errors +CMEE
Description:
This command disables or enables the use of the “+CME ERROR: ” or “+CMS
ERROR:” result code instead of simply “ERROR”. See appendix 0 for +CME ERROR
result codes description and appendix 0 for +CMS ERROR result codes.

Syntax:
Command syntax:

AT+CMEE=

Command
AT+CMEE=0
Note: Disable ME error reports, use only « ERROR »
AT+CMEE=1
Note: Enable «+CME ERROR: » or
«+CMS ERROR: »

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Possible responses
OK
OK

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Chapter 5– Call Control Commands

Keypad control +CKPD
Description:
This command emulates the ME keypad by sending each keystroke as a character in a 
string. The supported GSM sequences are listed in the appendix.
If emulation fails, a +CME ERROR:  is returned. If emulation succeeds, the result depends
on the GSM sequence activated: : string of the following characters (0-9,*,#).
Note:

In the case where the FDN phonebook is activated, the sequences concerning “call
forwarding” are allowed only if the entire sequence is written in the FDN.

Syntax:
Command syntax:

AT+CKPD=

Command
AT+CKPD=”*#21#”
Note: Check every call forwarding status
AT+CKPD=”1234”
Note: Sequence not allowed

Possible responses
+CCFC: 0,7
+CME ERROR 3

Clock Management +CCLK
Description:
This command sets or gets the current date and time of the ME real-time clock.
String format for date/time is: “yy/MM/dd,hh:mm:ss”. Valid years are 98 (for 1998) to 97 (for
st
2097). The seconds field is not mandatory. Default date/time is “98/01/01,00:00:00” (January 1 ,
1998 / midnight).

Syntax:
Command syntax:

AT+CCLK=

Command
AT+CCLK=”00/06/09,17:33:00”
th
Note: set date to June 9 , 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

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Possible responses
OK
Note: Date/Time stored
+CME ERROR 3
+CCLK: “00/06/09,17:34:23”
th
Note: current date is June 9 , 2000
current time is 5:34:23 pm

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Chapter 5– Call Control Commands

Alarm Management +CALA
Description:
This command sets the alarm date/time in the ME.
String format for alarms: “yy/MM/dd,hh:mm:ss” (see +CCLK).
The maximum number of alarms is 16. Seconds are not taken into account.

Syntax:
Command syntax:

AT+CALA= (set alarm)
AT+CALA=””, (delete alarm)

Command
AT+CALA=”00/06/09,07:30”
th
Note: set an alarm for June 9 , 2000 at 7:30 am
AT+CALA=”99/03/05,13:00:00”
th
Note: set an alarm for March 5 , 1999 at 1:00 pm
AT+CALA?
Note: list all alarms

AT+CALA=””,2
Note: delete alarm index 2
AT+CALA?
Note: list all alarms

Possible responses
OK
Note: Alarm stored
+CME ERROR 3
Note: Invalid alarm (date/time expired)
+CALA: “00/06/08,15:25:00”,0
+CALA: “00/06/09,07:30:00”,1
+CALA: “00/06/10,23:59:00”,2
Note: three alarms are set (index 0, 1, 2)
+CALA: “00/06/08,15:25:00”,0
Note: an alarm occurs (index 0)
OK
Note: Alarm index 2 deleted
+CALA: “00/06/09,07:30:00”,1
Note: Only one alarm (index 1)

Ring Melody Playback +CRMP
Description:
This command allows a melody to be played. All melodies are manufacturer defined. For
incoming voice, data or fax calls, 10 manufacturer-defined melodies can be played back (in a
loop). For an incoming short message, 2 manufacturer-defined sounds can be played back
(once). Melody #1: short beep / Melody #2: long beep.
Note:

Loop melodies (for voice/data/fax call) must be stopped by a +CRMP command with
the  field set to 0 (example: +CRMP=0,,,0).
When the  parameter is given, this overwrites the  value of the
+CRSL command. If the  parameter is not given, the  value of
+CRSL is used as default value.

Syntax:
Command syntax:

AT+CRMP=[,,,]

Command
AT+CRMP=0,7,0,2
Note: Play voice call melody index 2 with volume level 7.
AT+CRMP=0,,,0
Note: Stop the melody.
AT+CRMP=?
Note: supported parameters

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Possible responses
OK
Note: Melody Playback.
OK
Note: The melody is stopped.
+CRMP: (0-3),(0-15),0,(0-10)
OK

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Chapter 5– Call Control Commands

Defined values:

0 Incoming voice call
1 Incoming data call
2 Incoming fax call
3 Incoming short message (SMS)

0 Min volume
6 Default volume
15Max volume

0 Manufacturer Defined (default)

0
Stop Melody Playback
1-10
Melody ID for voice/data/fax call type (default: 1)
1-12
Melody ID for short message (default: 1)

Ringer Sound Level +CRSL
Description:
This command sets and gets the sound level of the ringer on incoming calls. The set command
changes the default  value of the +CRMP command.

Syntax:
Command syntax:

AT+CRSL=

Command
AT+CRSL=0
Note: Set volume to Min.
AT+CRSL=15
Note: Set volume to Max.
AT+CRSL?
Note: get current ringer
sound level
AT+CRSL=?
Note: supported parameters

Possible responses
OK
Note: Current ring playing with Min. volume.
OK
Note: Current ring playing with Max. volume.
+CRSL: 15
OK
Note: Current level is 15 (max.)
+CRSL: (0-15)
OK

Defined values:

0
Min volume
6
Default volume (default)
15
Max volume

Multi-Tech Systems, Inc. PN S000293A

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Chapter 5– Call Control Commands

CHAPTER 5 - CALL CONTROL COMMANDS
Dial command D
Description:
The ATD command sets a voice, data or fax call. As per GSM 02.30, the dial command also
controls supplementary services.
For a data or a fax call, the application sends the following ASCII string to the product (the
bearer must be previously selected with the +CBST command):
ATD where  is the destination phone number.
For a voice call, the application sends the following ASCII string to the product: (the bearer may
be selected previously, if not a default bearer is used).
ATD where  is the destination phone number.
Please note that for an international number, the local international prefix does not need to be
set (usually 00) but does need to be replaced by the ‘+’ character.
Example: to set up a voice call to Wavecom offices from another country, the AT command is:
“ATD+33146290800;”
Note that some countries may have specific numbering rules for their GSM handset numbering.
The response to the ATD command is one of the following:
Verbose
result code
OK
CONNECT


Numeric
code
(with ATV0 set)
0
10,11,12,13,14,15

Description

BUSY
NO ANSWER

7
8

If the called party is already in communication
If no hang up is detected after a fixed network time-out

NO CARRIER

3

Call setup failed or remote user release. Use the AT+CEER
command to know the failure cause

if the call succeeds, for voice call only
if the call succeeds, for data calls only,  takes the
value negotiated by the product.

Direct dialing from a phonebook (stored in the SIM card) can be performed with the following
command:
ATD> ;

to call  from the selected phonebook (by the +CPBS command)

ATD> “BILL”;

to call “BILL” from the selected phonebook

Multi-Tech Systems, Inc. PN S000293A

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Chapter 5– Call Control Commands

ATD> mem  (mem is “SM","LD","MC","ME","RC","MT" or "SN", see +CPBS
command) allows direct dialing from a phonebook number. Does not function with "ON" mem.

Syntax:
Command syntax:

ATD[][;]
ATD>[][][;]
ATD>[][][;]

Command
AT+CPBS?
Note: Which phonebook is selected ?

ATD>SM6;
Note: Call index 6 from AND phonebook

Possible responses
+CPBS:”SM”,8,10
Note: ADN phonebook is selected,
8 locations are used and 10
locations are available
OK
Note: Call succeeds

When the FDN phonebook has been locked, only numbers beginning with the digits of FDN
phonebook entries can be called. For example, if “014629” is entered in the FDN phonebook all
the phone numbers beginning with these 6 digits can be called. The CLIR supplementary
service subscription can be overridden for this call only.
“I” means “invocation” (restrict CLI presentation).
“i” means “suppression” (allow CLI presentation).
Control of CUG supplementary service information by “G” or “g” is allowed for this call only. The
index and info values set with the +CCUG command are used. An outgoing call attempt could
be refused if the AOC service is active and credit has expired (NO CARRIER). When trying to
set up an outgoing call while there is an active call, the active call is first put on hold, then the
call set up is carried out. As per GSM 02.30, GSM sequences may be controlled using dial
commands. These sequences can contain “*”, “#”, but “;” is forbidden. If the sequence is not
supported or fails, +CME ERROR:  is returned. In the case where the FDN phonebook is
activated, the sequences concerning call forwarding are allowed only if there are written in the
FDN.

Command
ATD*#21#
Note: Check any call forwarding status
ATD**61*+33146290800**25#
Note: Register call forwarding on no reply, with no reply
timer fixed at 25 s.
ATD*2#
Note: Bad sequence

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CCFC: 0,7
Note: No call forwarding
OK
Note: done
+CME ERROR 3

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Chapter 5– Call Control Commands

Hang-Up command H
Description:
The ATH (or ATH0) command disconnects the remote user. In the case of multiple calls, all calls
are released (active, on-hold and waiting calls). The specific Wavecom ATH1 command has
been appended to disconnect the current outgoing call, only in dialing or alerting state (ie. 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
ATH
Note: Ask for disconnection
ATH1
Note: Ask for outgoing call disconnection

Possible responses
OK
Note: Every call, if any, are released
OK
Note: Outgoing call, if any, is released

Answer a call A
Description:
When the product receives a call, it sets the RingInd signal and sends the ASCII “RING” or
“+CRING: ” 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

ATA
Note: Answer to this incoming call
ATH
Note: Disconnect call

Possible responses
RING
Note: Incoming call
OK
Note: Call accepted
OK
Note: Call disconnected

Remote disconnection
This message is used by the product to inform the application that an active call has been
released by the remote user.
The product sends “NO CARRIER” to the application and sets the DCD signal.
In addition, for AOC, the product can release the call if credit has expired (release cause 68 with
+CEER command).

Multi-Tech Systems, Inc. PN S000293A

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Chapter 5– Call Control Commands

Extended error report +CEER
Description:
This command gives the cause of call release when the last call set up (originating or
answering) failed.

Syntax:
Command syntax:

AT+CEER

Command
ATD123456789;
Note: Outgoing voice call
AT+CEER
Note: Ask for reason of release

Possible responses
NO CARRIER
Note: Call setup failure
+CEER: Error 
OK
Note: is the cause information element values from GSM
recommendation 04.08 or specific Call accepted

For the cause information element from GSM Technical Specification 04.08 see chapter 18.4 or
18.5.
“NO CARRIER” indicates that the AT+CEER information is available for failure diagnosis.

DTMF signals +VTD, +VTS
+VTD Description:
The product enables the user application to send DTMF tones over the GSM network. This
command is used to define tone duration (the default value is 300ms). To define this duration,
the application uses: AT+VTD=
where *100 gives the duration in ms. If n < 4, tone
duration is 300 ms.

+VTD Syntax:
Command syntax:

AT+VTD=

Command
AT+VTD=6
Note: To define 600 ms tone duration
AT+VTD=0
Note: To set the default value

Possible responses
OK
Note: Command valid
OK

+VTS Description:
The product enables the user application to send DTMF tones over the GSM network. This
command enables tones to be transmitted.
To transmit DTMF tones (only when there is an active call), the application uses:
AT+VTS=

where  is in {0-9,*,#,A,B,C,D}

+VTS Syntax:

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Chapter 5– Call Control Commands

Command syntax:

AT+VTS=

Command
AT+VTS=A
AT+VTS=11
Note: To set the default value
AT+VTS=4

Possible responses
OK
Note: Command valid
+CME ERROR: 4
Note: If the  is wrong
+CME ERROR: 3
Note: If there is no communication

Informative example:
To send tone sequence 13#, the application sends:
AT+VTS=1;+VTS=3;+VTS=#
OK

Redial last telephone number ATDL
Description:
This command redials the last number used in the ATD command. The last number dialed is
displayed followed by “;” for voice calls only

Syntax:
Command syntax:

ATDL

Command
ATDL
Note: Redial last number

Possible responses
0146290800;
OK
Note: Last call was a voice call. Command valid

Automatic dialing with DTR AT%Dn
Description:
This command enables and disables:
·
automatic dialing of the phone number stored in the first location of the ADN phonebook,
·
automatic sending of the short message (SMS) stored in the first location of the SIM.
The number is dialed when DTR OFF switches ON. The short message is sent when DTR OFF
switches ON.

Syntax:
Command syntax:

AT%D[ ;]

Command
AT%D1;
Note: Activates DTR number dialing
DTR is OFF
DTR switches ON
Note: The number in the first location of the ADN is
dialed automatically
DTR switches OFF
Note: The product goes on-hook
AT%D2

Multi-Tech Systems, Inc. PN S000293A

Possible responses
OK
Note: Command has been executed

OK

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Chapter 5– Call Control Commands

Note: Activates DTR short message sending

Note: Command has been
executed

Defined values:

(0-2)
to 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
Enables automatic DTR dialing if DTR switches from OFF to ON; Dials the phone number in the
first location of the ADN phonebook. Voice call.
AT%D1
Activates automatic DTR dialing if DTR switches from OFF to ON; Dials the phone number in
the first location of the ADN phonebook. Data or Fax call.
AT%D2
Activates automatic DTR message transmission if DTR switches from OFF to ON.

Automatic answer ATS0
Description:
This S0 parameter determines and controls the product automatic answering mode.

Syntax:
Command syntax:

ATS0=

Command
ATS0=2
Note: Automatic answer after 2 rings
ATS0?
Note: Current value
ATS0=0
Note: No automatic answer

Possible responses
OK
002
OK
Note: always 3 characters padded with zeros
OK
Note: Command valid

All others S-parameters (S6,S7,S8 …) are not implemented.

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Incoming Call Bearer +CICB
Description:
This command sets the type of incoming calls when no incoming bearer is given (see +CSNS).
Note:

Setting the +CICB command affects the current value of +CSNS.

Syntax:
Command syntax:

AT+CICB=

Command
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

Possible responses
OK
Note: Command accepted
OK
Note: Command accepted
+CICB: 2
Note: Default incoming bearer: voice call
+CICB: (0-2)
Note: Speech, data or fax default incoming bearer

Defined values:

0: Data
1: Fax
2: Speech

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).
Note:

Setting the +CSNS command affects the current value of +CICB.

Syntax:
Command syntax:

AT+CSNS

Command
AT+CSNS=2
Note: force a fax call
AT+CSNS=0
Note: force a voice call
AT+CSNS?
Note: Interrogate value
AT+CSNS=?
Note: Test command

Possible responses
OK
Note: Command accepted
OK
Note: Command accepted
+CSNS: 0
Note: Default incoming bearer: voice call
+CSNS: (0,2,4)
Note: Voice, data or fax default incoming bearer

Defined values:

0: Voice
2: Fax
4: Data

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Gain control +VGR, +VGT
Description:
This command tunes the receive gain of the speaker and the transmit gain of the microphone.
The application sends:
AT+VGR=

for receive gain

0 to 15
16 to 31
32 to 47
48 to 63
64 to 79
80 to 95
96 to 111
112 to 127
128 to 143
144 to 159
160 to 175
176 to 191
192 to 207
208 to 223
224 to 255 (*)

+6 db
+4 db
+2 db
+0 db
-2 db
-4 db
-6 db
-8 db
-10 db
-12 db
-14 db
-16 db
-18 db
-20 db
-22 db

AT+VGT=
Controller 1
0 to 31
32 to 63
64 to 95
96 to 127
128 to 159
160 to 191
192 to 223
224 to 255

for transmit gain
Controller 1
+30 db
+33 db
+36 db
+39 db
+42 db
+45 db
+48 db
+51 db

AT+VGT=
Controller 2
0
1
2
3
…
19
20
21 (**)
22 (**)
23 (**)
…
58 (**)
59 (**)
60 (**)
61
62
…
101
102 to 127
128 to 243
244
245
246
…
255

for transmit gain
Controller 2
+0 db
+0,5 db
+1 db
+1,5 db
…
+9,5 db
+10 db
+10.5 db
+11 db
+11.5 db
+29 db
+29.5 db
+30 db
+30,5 db
+31 db
…
+50,5 db
+51 db
-6,5 db
-6 db
-5,5 db
-5 db
…
-0,5 db

The gain values listed here are relative, for absolute (electrical) values please refer to the
specific hardware documentation of the module used in the application.

Syntax:
Command syntax:

AT+VGR=
AT+VGT=
Command
AT+VGR=25
AT+VGT=45
AT+VGR?
Note: Interrogate value
AT+VGR=?
Note: Test command
AT+VGT?
Note: Interrogate value
AT+VGT=?
Note: Test command

Multi-Tech Systems, Inc. PN S000293A

Possible responses
OK
Note: Command valid
OK
Note: Command valid
+VGR: 64
Note: Default receive gain
+VGR: (0-255)
Note: Possible values
+VGT: 64
Note: Default transmit gain
+VGT: (0-255)
Note: Possible values

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Chapter 5– Call Control Commands

Microphone Mute Control +CMUT
Description:
This command mutes the microphone input on the product (for the active microphone set with
the +SPEAKER command). This command is only allowed during a call.

Syntax:
Command syntax:

AT+CMUT=

Command
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)

Possible responses
+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

Defined values:

0: microphone mute off (default value).
1: microphone mute on.

Speaker & Microphone selection +SPEAKER
Description
This specific command selects the speaker and the microphone set.

Syntax:
Command syntax:

AT+SPEAKER=

Command
AT+SPEAKER=0
Note: Speaker ONE and Micro ONE
AT+SPEAKER?

AT+SPEAKER=?

Possible responses
OK
Note: Command valid
+SPEAKER: 0
OK
Note: Speaker ONE and Micro ONE are active
+SPEAKER: (0,1)
OK

Defined values:

0: SPEAKER ONE, MICRO ONE
1: SPEAKER TWO, MICRO TWO

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Echo Cancellation +ECHO
Description:
This command enables, disables or configures the Echo Cancellation functions for voice calls (in
rooms, in cars, etc.). It is necessary to tune the Microphone gain (AT+VGT) and the Speaker
gain (AT+VGR) before activating the Echo Cancellation.

Syntax:
Command syntax:
`` AT+ECHO=  [,,
,,,,,]
Command
AT+CMEE=1
Note: Enables the use of result code
AT+SPEAKER?

AT+SIDET=0
Note: Deactivate the Sidetone
AT+SIDET?
AT+ECHO?
Note: Read current settings
AT+ECHO=1,1,0,3,10,7
Note: Active Echo cancellation 1 for Mic/Spk one.
AT+ECHO?
Note: Read current settings
AT+ECHO=1,3,30,8000,256
Note: Activate the Echo cancellation 3
AT+ECHO?
Note: Read the Echo cancellation settings
AT+CFUN=1
Note: Reset the product
AT+ECHO?
Note: Read current settings
AT+ECHO=0
Note: Deactivate the Echo Cancellation

Possible responses
OK
+ SPEAKER: 0
OK
Note: Speaker ONE and Micro ONE are active
OK
+SIDET: 0,0
+ECHO: 0,1,0,3,10,7
OK
OK
+ECHO: 1,1,0,3,10,7
OK
+CME ERROR: 519
Note: The new algorithm will be activated after a
reset of the product
+ECHO: 3,3,30,8000,256
OK
OK
+ECHO: 1,3,30,8000,256
OK
OK

Defined values:

0: Deactivate Echo
1: Activate Echo
When mode = 1 is choosen, AlgoId is mandatory.

1: Echo cancellation 1
3: Echo cancellation 3
To use Echo cancellation 3, the ECHO feature must be activated.
Echo cancellation 1 (4 parameters):
The parameter  specifies the maximum attenuation of the switch


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Chapter 5– Call Control Commands

0: 31 db (default)
1: 29 db
2: 27 db
3: 25 db
…
14: 3 db
15: 1 db
The parameter  specifies the attenuation step between attenuation and no attenuation.

0: 1 db
1: 2 db
2: 3 db
3: 4 db (default)
The  parameter specifies the relative threshold between max and min energy
information.
The allowed range is [ 0 ; 31 ]. (10 by default)
The  parameter specifies threshold of max energy information.
The allowed range is [ 0 ; 31 ]. (7 by default)
Echo Cancellation 3 (3 parameters):
 high value leads to high echo attenuation but the full-duplex quality will be less
efficient.
The allowed range is [ 0 ; 63 ]. (30 by default)
 indicates the noise threshold. Low value leads to high noise attenuation. The
threshold 32767 indicates no noise attenuation. The allowed range is [0 ;32767]. (8000 default)
 indicates the Number of Taps of the Adaptive Filter. The allowed range is [64
;256]. (256 by default)-64 taps is for short Echo-256 taps is for long Echo.
Read Command:
AT+ECHO?
This command returns the current settings of the Echo cancellation.
Returns: +ECHO: ,, ,, , ,
,
The number of parameters displayed depends on the algorythm used. For Echo cancellation 1,
4 parameters are displayed, 3 parameters are displayed for Echo cancellation 3.

0 Echo Deactivated.
1 Echo Activated for Mic/Spk one.
2 Echo Activated for Mic/Spk two.
3 Reset the product.
Note:

You can activate/deactivate the echo cancellation during a call without resetting the
product if the  parameter is not changed.

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Chapter 5– Call Control Commands

SideTone modification +SIDET
Description:
This command sets the level of audio feedback in the speaker (microphone feedback in the
speaker).

Syntax:
Command syntax:

AT+SIDET=,
Command
AT+SIDET=1,0
AT+SIDET?
Note: Current value

Possible responses
OK
Note: Command valid
+SIDET: 1,0
OK
Note: Command valid

Defined values:

0: SideTone is disabled
1: SideTone is enabled

0: 0 db
1: - 6 db
2: - 12 db
3: - 18 db

Initialize Voice Parameters +VIP
Description:
This command allows factory settings for voice parameters to be restored from EEPROM.
These voice parameters include:
·
Gain control (+VGR & +VGT commands),
·
Microphone mute control (+CMUT command),
·
Speaker & Microphone selection (+SPEAKER command),
·
Echo cancellation (+ECHO command),
·
Side tone modification (+SIDET command).

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Syntax:
Command syntax:

AT+VIP=

 =1 Restore all voice parameters.
Command

Possible responses

AT+VIP?

+VIP: 1
OK
+CME ERROR: 3

AT+VIP=2
Note: Syntax error
AT+VIP=1
Note: Restore the factory settings from EEPROM
AT+VIP=1
Note: Restore the factory settings from EEPROM with
the current Echo cancellation algo (different of the
default algo).
AT+VIP=?
Note: List of supported s

Multi-Tech Systems, Inc. PN S000293A

OK
Note: The command has been executed
CME ERROR: 519
Note: Reset the product to accept the new algo.

+VIP: (1)
OK

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Chapter 6 – Network Service Commands

CHAPTER 6 - NETWORK SERVICE COMMANDS
Signal Quality +CSQ
Description:
This command determines the received signal strength indication () and the channel bit error
rate () with or without a SIM card inserted.

Syntax:
Command syntax:

AT+CSQ
Command
AT+CSQ

Possible responses
+CSQ: ,
OK
Note:  and  as defined below

Defined values:
:
0: -113 dBm or less
1:
-111 dBm
30:
-109 to –53 dBm
31:
-51dBm or greater
99:
not known or not detectable
: 0…7: as RXQUAL values in the table GSM 05.08
99:
not known or not detectable

Operator selection +COPS
Description:
There are three possible ways of selecting an operator (PLMN):
1) The product is in manual mode. It then tries to find the operator specified by the application
and if found, tries to register.
2) The product is in automatic mode. It then tries to find the home operator and if found, tries to
register. If not found, the product automatically searches for another network.
3) The product enters into manual/automatic mode, and then tries to find an operator as
specified by the application (as in manual mode). If this attempt fails it enters automatic mode.
If this is successful, the operator specified by the application is selected. The mobile equipment
then enters into automatic mode.
Note:

The read command returns the current mode and the currently selected operator. In
manual mode, this PLMN may not be the one set by the application (as it is in the
search phase). These commands are not allowed during one communication.

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Chapter 6 – Network Service Commands

Syntax:
To force an attempt to select and register on a network, the application must send the following
command:
Command syntax: AT+COPS=, [ [ ,  ] ]
Possible responses for AT+COPS=:
OK
(Network is selected with full service)
+CME ERROR: 30 (No network service),
+CME ERROR: 32 (Network not allowed – emergency calls only)
+CME ERROR: 3
(not allowed during one Communication)
+CME ERROR: 4
(Incorrect parameters)
+CME ERROR: 527 (Please wait, and retry your selection later)
+CME ERROR: 528 (Location update failure – emergency calls only)
+CME ERROR: 529 (Selection failure – emergency calls only)
Response syntax for AT+COPS?:
+COPS:  [, ,  ]
Response syntax for AT+COPS=?:
+COPS: [list of supported (, long alphanumeric , short alphanumeric s,
numeric ) s]
If an incoming call occurs during a PLMN list request, the operation is aborted
(+CME ERROR: 520) and the unsolicited RING appears
Command
AT+COPS?
Note: Ask for current PLMN
AT+COPS=?

Note: Ask for PLMN list
AT+COPS=1,2,20810
Note: Ask for registration on SFR network
AT+COPS=1,1,23433
Note: Ask for registration on UK Orange network
AT+COPS=0
Note: Ask for registration on home network
AT+COPS=3,0
Note: Set  to long alphanumeric
AT+COPS?
Note: Ask for current PLMN
AT+COPS=2
Note: Ask for deregistration from network
AT+COPS?
Note: Ask for current PLMN

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Possible responses
+COPS: 0,2,20801
OK
Note: Home PLMN is France Telecom Orange
+COPS: (2,”F Itinéris”,”Itline”,”20801”), (3,”F
SFR”,”SFR”,”20810”)
OK
Note: Home PLMN is France Telecom SFR network has
been detected
+CME ERROR: 32
Note: Network not allowed – emergency calls only
+CME ERROR: 529
Note: Selection failed – emergency calls only
OK
Note: Succeeded
OK
+COPS: 0,0,”Orange F”
OK
Note: Home PLMN is France Telecom Orange
OK
Note: Succeeded
+COPS: 2
Note: ME is unregistered until =0 or 1 is selected

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Chapter 6 – Network Service Commands

Defined values:
The parameters values are the following ones:

0: automatic (default value)
1: manual
2: deregistration ; ME will be unregistered until =0 or 1 is selected.
3: set only  (for read command AT+COPS?)
4: manual / automatic ( shall be present), if manual selection fails, automatic mode is
entered.
: format of  field

0: long alphanumeric format 
1: short alphanumeric format 
2: numeric  (default value) : status of 

0: unknown
1: available
2: current
3: forbidden
: operator identifier (MCC/MNC in numeric format only for operator selection)
The long alphanumeric format can be up to 16 characters long (see appendix 0 for operator
names description, field is “Name”). The short alphanumeric format can be up to 8 characters
long.

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Network registration +CREG
Description:
This command determines the registration status of the product.

Syntax:
Command syntax:

AT+CREG= 

Response syntax:

+CREG: ,  [ ,, ] for AT+CREG? Command only

Command
AT+CREG?

AT+CREG=0
Note: Disable network registration unsolicited result code
AT+CREG=1
Note: Enable network registration unsolicited result code
AT+CREG=2
Note: Enable network registration and location
information unsolicited result code
AT+CREG=?

Possible responses
+CREG: ,
OK
Note: As defined here-above
OK
Note: Command valid
OK
Note: Command valid
OK
Note: Command valid
+CREG: (0-2)
Note: 0,1,2  values are supported

Defined values:

0:
1:
2:

Disable network registration unsolicited result code (default)
Enable network registration code result code +CREG: 
Enable network registration and location information unsolicited result code +CREG:
,, if there is a change of network cell.


0:
1:
2:
3:
4:
5:

not registered, ME is not currently searching for a new operator.
registered, home network.
not registered, ME currently searching for a new operator to register to.
registration denied.
unknown.
registered, roaming.

: string type; two byte location area code in hexadecimal format (e.g. “00C3” equals 195
in decimal).
:

string type; two byte cell ID in hexadecimal format.

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Read operator name +WOPN
Description:
This specific command returns the operator name in alphanumeric format when given the
numeric format.

Syntax:
Command syntax:

AT+WOPN=,

Response syntax:

+WOPN: ,

Command
AT+WOPN=?
Note: Test command
AT+WOPN=0,20801
Note: Give an operator in numeric format
AT+WOPN=0,99999
Note: Give a wrong operator

Possible responses
OK
+WOPN: 0,”Orange F”
OK
Note: Alphanumeric answer
+CME ERROR: 22
Note: Not found

Defined values:
 is the required format. Only long (0) and short (1) alphanumeric formats are
supported.
 is the operator in numeric format.
 is the operator in long or short alphanumeric format (see appendix 0 for operator
names description)

Selection of Preferred PLMN list +CPLS
Description:
This command selects one PLMN selector with access technology list in the SIM card that is
used by AT+CPOL command.

Syntax:
Command syntax:

AT+CPLS= 

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Command
AT+CPLS?
Note: Ask for selection of the SIM file
AT+CPLS=0

Possible responses
+CPLS: 1
OK
Note: EF_OPLMNwAct is selected
Note: if EF_PLMNwAct is not present, EF_PLMNsel will be
selected

Note: selection of EF_PLMNwAct
AT+CPLS=1
Note: selection of EF_OPLMNwAct
AT+CPLS=?
Note: Get possible values

+CME ERROR: 3
Note: EF_OPLMNwAct is not present
+CPLS: (0-2)
OK
Note: The 3 files with Acces technology are present and can
be selected

+CPLS: (0)

AT+CPLS=?
Note: Get possible values

OK
Note: Only EF_PLMNwAct or EF_PLMNsel can be
selected

Defined values:
:
0: User controlled PLMN selector with access technology EF_PLMNwAct
Note: if this file is not found EF_PLMNSel will be selected
1: Operator controlled PLMN selector with access technology EF_OPLMNwAct
2: Home PLMN selector with access technology EF_HPLMNwAct

Preferred operator list +CPOL
Description:
This command edits (or updates) the SIM preferred list of networks. This list is read in the SIM
file selected by the command AT+CPLS.

Syntax:
Command syntax:

AT+CPOL=

[] [,[,[,,,]]]
The different possibilities are:
·
AT+CPOL =  to delete an entry.
·
AT+CPOL = ,  to set the format used by the read command (AT+CPOL?).
·
AT+CPOL = , ,  to put  in the next free location.
·
AT+CPOL =  ,  ,  to write  in the  at the
.
·
AT+CPOL = ,,,,,
to write  in the  at the  precising the acces technology (in the case
of EF_PLMNwact, EF_HPLMNwact or EF_OPLMNwact is present).

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Chapter 6 – Network Service Commands

Note:

Per default if Acces technology parameters are not given, the GSM access
technology will be choosen.

The supported format are those of the +COPS command.
The length of this list is limited to 85 entries for EF_PLMNsel, and 51 for EF_PLMNwAct,
EF_OPLMNwAct, EF_HPLMNwAct.
Command
AT+CPOL?

Note: Ask for preferred list of networks
With only EF_PLMNsel present
AT+CPOL?

Note: Ask for preferred list of networks
With EF_PLMNwAct selected and present

AT+CPOL=,0
Note: Select long alphanumeric format
AT+CPOL?

Note: Ask for preferred list of networks
With only EF_PLMNsel present
AT+CPOL=7,2,20801
Note: Add a network to the list

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CPOL:1,2,26201
+CPOL: 6,2,20810
OK
Note: Preferred list of networks in numeric format (read in
EF_PLMNsel)
+CPOL:1,2,26201,1,0,0
+CPOL: 6,2,20810,1,0,0
OK
Note: Preferred list of networks in numeric format (read in
EF_PLMNwAct)
GSM acces technology selected
GSM compact acces technology not selected
Utran acces technology not selected
OK
+CPOL: 1,0,”D1-TELEKOM”
+CPOL: 6,0,”F SFR”
OK
Note: Preferred list of networks in long alphanumeric
format
OK

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Chapter 6 – Network Service Commands

Command
AT+CPOL?

Note: Ask for preferred list of networks
With only EF_PLMNsel present
AT+CPOL=7
th
Note: Delete 7 location
AT+CPOL?

Note: Ask for preferred list of networks
With only EF_PLMNsel present
AT+CPOL=8,2,77777
Note: Add a new network to the list
With only EF_PLMNsel present

Possible responses
+CPOL: 1,0,”D1-TELEKOM”
+CPOL: 6,0,”F SFR”
+CPOL: 7,0,”Orange F”
OK
Note: Preferred list of networks in long alphanumeric
format
OK
+CPOL: 1,0,”D1-TELEKOM”
+CPOL: 6,0,”F SFR”
OK
Note: Preferred list of networks in long alphanumeric
format
OK

AT+CPOL=8,2,77777,0,0,1
Note: Add a new network to the list
With EF_PLMNwact present

OK
Note: Acces technology UTRAN is selected

AT+CPOL=8,2,77777
Note: Add a new network to the list
With EF_PLMNwact present
AT+CPOL?

OK
Note: Per default Acces technology GSM is selected

Note: Ask for preferred list of networks
With only EF_PLMNsel present
AT+CPOL=9,0,”Orange F”
Note: Add a new network to the list (text
format)
AT+CPOL?

Note: Ask for preferred list of networks
With only EF_PLMNsel present

+CPOL: 1,0,”D1-TELEKOM”
+CPOL: 6,0,”F SFR”
+CPOL: 8,2,77777”
OK
Note: Preferred list of networks in long alphanumeric
th
format but 8 entry is unknown so the product edits it in the
numeric format

+CPOL: 1,0,”D1-TELEKOM”
+CPOL: 6,0,”F SFR”
+CPOL: 8,2,77777”
+CPOL: 9,0,”Orange F”
OK
Note: Preferred list of networks in long alphanumeric
format

Defined values:
: position of the operator record in the sim preferred operator list.
:
0 long alphanumeric format for 
1 short alphanumeric format for 
2 numeric format for 
: characterstring or integer (see ) indicating operator identifier.
: GSM access technology
: GSM compact access technology
: UTRA access technology
0 access technology not selected
1 access technology selected

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CHAPTER 7 - SECURITY COMMANDS
Enter PIN +CPIN
Description:
This command enters the ME passwords (CHV1 / CHV2 / PUK1 / PUK2, etc.), that are required
before any ME functionality can be used. CHV1/CHV2 is between 4 and 8 digits long,
PUK1/PUK2 is only 8 digits long. If the user application tries to make an outgoing call before
the SIM PIN code (CHV1) has been confirmed, then the product will refuse the “ATD” command
with a “+CME ERROR: 11” (SIM PIN required). The application is responsible for checking the
PIN after each reset or power on - if the PIN was enabled.

Syntax:
Command syntax: AT+CPIN=
Command
AT+CPIN=1234
Note: Enter PIN
AT+CPIN=5678
Note: Enter PIN

Possible responses
OK
Note: PIN code is correct
+CME ERROR: 3
Note: Operation not allowed, PIN
previously entered

After 3 unsuccessful attempts to enter the PIN (Personal Identification Number), the PUK
(Personal Unblocking Key) will be required. PUK validation forces the user to enter a new PIN
code as a second parameter and this will be the new PIN code if PUK validation succeeds.
CHV1 is then enabled if PUK1 is correct. The application therefore uses this command:
AT+CPIN=,
Command
AT+CPIN=00000000,1234
Note: Enter PUK and new PIN
AT+CPIN=12345678,1234
nd
Note: Enter PUK and new PIN, 2 attempt

Possible responses
+CME ERROR: 16
Note: Incorrect PUK
OK
Note: PUK correct, new PIN stored

To determine which code must be entered (or not), the following query command can be used:
AT+CPIN?
The possible responses are:
+CPIN: READY
+CPIN: SIM PIN
+CPIN: SIM PUK
+CPIN: SIM PIN2
+CPIN: SIM PUK2
+CPIN: PH-SIM PIN
+CPIN: PH-NET PIN

ME is not pending for any password
CHV1 is required
PUK1 is required
CHV2 is required
PUK2 is required
SIM lock (phone-to-SIM) is required
Network personnalisation is required

+CME ERROR: 

SIM failure (13) absent (10) etc…

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Please note that in this case the mobile equipment does not end its response with the OK string.
The response +CME ERROR: 13 (SIM failure) is returned after 10 unsuccessful PUK attempts.
The SIM card is then out of order and must be replaced by a new one.
Example: 3 failed PIN validations + 1 successful PUK validation
AT+CPIN?
+CPIN: SIM PIN
AT+CPIN=1235
+CME ERROR: 16
AT+CPIN=1236
+CME ERROR: 16
AT+CPIN=1237
+CME ERROR: 16

Read the PIN status
The product requires SIM PIN
First attempt to enter a SIM PIN
Wrong PIN
Second attempt
Wrong PIN
Third attempt
Wrong PIN

AT+CPIN?
+CPIN: SIM PUK

Read PIN state
The product requires PUK

AT+CPIN=99999999,5678
OK
AT+CPIN?
+CPIN: READY

The PUK is entered, the new PIN shall be 5678 PUK validation is
OK. New Pin is 5678
Read PIN state
The product is ready

If the user tries to do something which requires PIN2 (CHV2), the product will refuse the action
with a “+CME ERROR: 17” (SIM PIN2 required). The product then waits for SIM PIN2 to be
given. Of course, if SIM PIN2 is blocked, SIM PUK2 is required instead of SIM PIN2.
For example, the product needs PIN2 to write in the fixed dialing phonebook (FDN) , so if SIM
PIN2 authentication has not been performed during the current session, SIM PIN2 is required
Command
AT+CPBS=”FD”
Note: Choose FDN
AT+CPBW=5,”01290917”,129,”Jacky”
Note: Write in FDN at location 5
AT+CPIN?
AT+CPIN=5678
Note: Enter SIM PIN2
AT+CPBW=2,”01290917”,129,”Jacky”
Note: Write in FDN at location 5

Note:

Possible responses
OK
+CME ERROR: 17
Note: SIM PIN2 is required
SIM PIN2
Note: SIM PIN2 is required
OK
OK
Note: Now writing in FDN is allowed

Please note that the product only requests PIN2 or PUK2 once. Therefore, if they are
not entered properly, the next +CPIN? command will return “+CPIN: READY”.

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Enter PIN2 +CPIN2
Description:
This command validates the PIN2 code (CHV2) or the PUK2 code (UNBLOCK CHV2) and
defines a new PIN2 code. Of course, the +CPIN command allows PIN2 or PUK2 codes to be
validated, but only when the last command executed resulted in PIN2 authentication failure.
PIN2 length is between 4 and 8 digits; PUK2 length is 8 digits only.

Syntax:
Command syntax: AT+CPIN2=
Command
AT+CPIN2=1234
Note: Enter PIN2
AT+CPIN2=5678
Note: Enter PIN2

Possible responses
OK
Note: PIN2 code is correct
+CME ERROR: 3
Note: Operation not allowed, PIN2 previously entered

After 3 unsuccessful attempts, PUK2 will be required. PUK2 validation forces the user to enter a
new PIN2 code as a second parameter and this will be the new PIN2 code if PUK1 validation
succeeds. The application uses this command:
AT+CPIN2=,
Command
AT+CPIN2=00000000,1234
Note: Enter PUK2 and new PIN2
AT+CPIN2=12345678,1234
nd
Note: Enter PUK2 and new PIN2, 2 attempt

Possible responses
+CME ERROR: 16
Note: Incorrect Password (PUK2)
OK
Note: PUK2 correct, new PIN2 stored

To determine which code must be entered (or not), the following query command can be used:
AT+CPIN2?
The possible responses are:
+CPIN2: READY
+CPIN2: SIM PIN2
+CPIN2: SIM PUK2
+CME ERROR: 

Multi-Tech Systems, Inc. PN S000293A

No PIN2 is needed
PIN2 is required
PUK2 is required
Absent (10) etc…

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Chapter 7 – Security Commands

PIN remaining attempt number +CPINC
Description:
This command gets the number of valid attempts for PIN1 (CHV1), PIN2 (CHV2), PUK1
(UNBLOCK CHV1) and PUK2 (UNBLOCK CHV2) identifiers.

Syntax:
Command syntax:

AT+CPINC

Response syntax:

+CPINC: ,,,

Command
AT+CPINC
Note: Get the number of attempts left
AT+CPINC?
Note: Get current values
AT+CPINC=?
Note: Get possible values

Possible responses
+CPINC: 2,3,10,10
Note: First CHV1 attempt was a failure
+CPINC: 2,3,10,10
Note: First attempt was a failure
OK

Defined values
,  are the attempts left for PIN1, PIN2 (0 = blocked, 3 max)
,  are the attempts left for PUK1, PUK2 (0 = blocked, 10 max)
For this to work, the card should be present at the time of initialization, otherwise an error will be
sent (+CME ERROR: 10).

Facility lock +CLCK
Description:
This command locks, unlocks or interrogates an ME or network facility .
Note:

Test SIM cards (with MCC=001 & MNC=01) doesn’t check “PS”, “PN”, “PU”, “PP” and
“PC” locks.

Syntax:
Command syntax: AT+CLCK= ,[,[,] ]
Response syntax: +CLCK:  [ , ]+CLCK: , [ … ] ]

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Command
AT+CLCK=”SC”,1,1234
Note: Enable PIN
AT+CLCK?
Note: Read PIN status

AT+CLCK=”SC”,0,5555
Note: Disable PIN
AT+CPIN=1234
Note: Enter PIN
AT+CLCK=?
Note: Request supported
facilities
AT+CLCK=”PN”,1,12345
678
Note: Activate network
lock
AR+CLCK=”AO”,1,1234,2
Note: Activate all
outgoing calls barring for
data calls
AT+CLCK=”AO”,2
Note: Query BAOC status
AT+CLCK=”SC”,0,0000
Note: Disable PIN

Possible responses
OK
Note: PIN was correct
+CLCK:(“PS”,0),(“SC”,0),(“FD”,0),(“PN“,0),(“PU“,0),(“PP“,0),(“PC“,0)
OK
Note: PIN is enabled, no SIM lock, no network lock, no information on
Call barring
(no longer supported in GSM Technical Specification 07.07)
+CME ERROR: 16
Note: PIN was wrong
OK
Note: PIN was good
+CLCK: (“PS”,”SC”,”AO”,”OI”,”OX”,”AI”,”IR”,”AB”,”AC”,
”FD”,"PN","PU","PP",”PN”)
OK
Note: Supported facilities
OK
Network lock activated

OK
Note: Call barring is activate

+CLCK: 1,2
OK
Note: BAOC activate for data calls only
+CME ERROR: 521
Note: PIN deactivation is forbidden with this SIM card

Defined values:
The following  values are supported:
“PS”: SIM lock facility with an 8-digit password.
“SC“: PIN enabled ( = 1) / disabled ( = 0)
“AO”: BAOC (Barr All Outgoing Calls)
“OI” : BOIC (Barr Outgoing International Calls)
“OX”: BOIC-exHC (Barr Outgoing. International Calls except to Home Country)
“AI” : BAIC (Barr All Incoming Calls)
“IR” : BIC-Roam (Barr Inc. When Roaming outside Home Country)
“AB”: All Barring services
“AG”: All outGoing barring services
“AC”: All inComing barring services
“PN”: Network lock with an 8-digit password (NCK).
“PU”: Network Subset lock with an 8-digit password (NSCK).
“PP”: Service Provider lock with an 8-digit password (SPCK).
“PC”: Corporate lock with an 8-digit password (CCK).
“FD”: SIM Fixed Dialing Numbers (FDN) memory feature (PIN2 is required as )

0: unlock the facility
1: lock the facility
2: query status

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: A facility status can be changed for only one class, or for all classes (7 or omitted).

1: Voice (telephony)
2: Data (apply to all bearer services)
4: Fax (facsimile services)
8: Short Message service
7: Equal to all classes (Default value)
Any attempt to combine different classes will result in activation / deactivation / interrogation of
all classes. Password maximum length is given with the AT+CPWD=? Command.
Note:

It will not possible to lock the FDN phonebook if this one is not loaded.

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Change password +CPWD
Description:
This command changes a password (PIN, call barring, NCK, etc.). The facility values () are
the same as for the +CLCK command with a “P2” facility to manage SIM PIN2. For the network
lock (“PN”), unlocking is forbidden after 10 failed attempts to disable (unlock) the network lock
with an incorrect password.

Syntax:
Command syntax:

AT+CPWD= , , 

Command
AT+CPWD=?
Note: Possible values

AT+CPWD=”SC”,1234,5555
Note: Change PIN
AT+CPWD=”SC”,1234,5555
Note: Change PIN
AT+CPIN=5555
Note: Enter PIN
AT+CPWD=”PN”,12345678,00000000
Note: Change NCK

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CPWD: (“PS”,8),(“SC”,8),(“AO”,4),(“OI”,4),(“OX”,4),
(“AI”,4),(“IR,4),(“AB”,4),(“AG”,4),(“AC”,4),
(“P2”,8),(“FD”,8),("PN",8),("PU",8),("PP",8), ("PC",8)
OK
Note: CHV1/CHV2 must be on 8 digits maximum (4mn)
For call barring, on 4 digits maximum
OK
Note: PIN was correct
+CME ERROR: 16
Note: PIN was wrong
OK
Note: PIN was correct
OK
Note: NCK changed for net lock

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Chapter 8 – Phonebook Commands

CHAPTER 8 - PHONEBOOK COMMANDS
Select phonebook memory storage +CPBS
Description:
This command selects phonebook memory storage. The available phonebooks are:
“SM”:
“FD”:
“ON”:
“EN”:
“LD”:
“MC”:
“ME”:
“MT”:
“RC”:
“SN”:

ADN (SIM phonebook)
FDN (SIM Fix Dialing, restricted phonebook)
MSISDN (SIM own numbers)
EN (SIM emergency number)
LND (combined ME and SIM last dialing phonebook)
MSD (ME missed calls list)
ME (ME phonebook)
MT (combined ME and SIM phonebook)
LIC (ME received calls list)
SDN (Services dialing phonebook)

Syntax:
Command syntax: AT+CPBS
Command
AT+CPBS=”SM”
Note: Select ADN phonebook
AT+CPBS=?
Note: Possible values
AT+CPBS?
Note: Status

Possible responses
OK
Note: ADN phonebook is selected
+CPBS: ("SM","LD","MC","ON","ME","RC","MT","SN")
OK
Note: only “EN” phonebook is not supported with this SIM card.
+CPBS:”SM”,10,20
OK
Note: ADN phonebook selected, 10 locations used, 20 locations
available

The ADN phonebook could not be selected as FDN is active.

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Read phonebook entries +CPBR
Description:
This command returns phonebook entries for a range of locations from the current phonebook
memory storage selected with +CPBS.
Note:

For all phonebook read commands (+CPBR, +CPBF, +CPBN, +CPBP, +CNUM), the
TON/NPI MSB of each number is set to 1 (ex: a TON/NPI stored as 17 is displayed as
145).

Syntax:
Command syntax: AT+CPBR
Command
AT+CPBR=?
Note: Test command

AT+CPBR=12,14
Note: Read entries from 12 to 14

AT+CPBR=10
Note: Read entry 10
AT+CPBR=11
Note: Read entry 11 (UCS2
format)
AT+CPBR=52
Note: Read entry 52 (wrong)

Possible responses
+CPBR: (1-50),20,10
OK
Note: 50 locations (from 1 to 50), max length for phone number is
20 digits, 10 characters max for the text
+CPBR: 12,”112”,129,”Emergency”
+CPBR: 13,”+331290909”,145,”Fred”
+CPBR: 14,”0146290808”,129,”Zazi”
OK
Note: Display locations 12,13,14 with location, number, type
(TON/NPI), Text
+CPBR:10,”0146290921”,129,”Rob”
OK
Note: Display location 10
+CPBR:11,”0146290921”,129,”8000010002FFFF”
OK
Note: Display location 11
+CME ERROR: 21
Note: Invalid index

Find phonebook entries +CPBF
Description:
This command returns phonebook entries with alphanumeric fields starting with a given string.
The AT+CPBF= “” command can be used to display all phonebook entries sorted in alphabetical
order. This command is not allowed for "LD", "RC", "MC", "SN" phonebooks and for the “EN”
phonebook, which does not contain alphanumeric fields. It is possible to use this command with
UCS2 strings. If a wrong UCS2 format is entered, the string is considered as an ASCII string.

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Chapter 8 – Phonebook Commands

Syntax:
Command syntax: AT+CPBF
Command
AT+CPBF=?
Note: Test command

AT+CPBF=“E”
Note: Read entries with “E”

AT+CPBF=”H”
Note: Read entries with “H”
AT+CPBF=”800001FFFF”
Note: Read entries starting with 0001 UCS2 character

AT+CPBF=”8045C”
Note: Read entries with “8045C” (ASCII format)

Possible responses
+CPBF: 20,10
OK
Note: Max length for phone number is 20
digits, 10 characters for the text
+CPBF: 12,”112”,129,”Emergency”
+CPBF: 15,”+331290101”,145,”Eric”
OK
Note: Display locations with text field starting
with “E”
+CME ERROR: 22
Note: Entry not found
+CPBF: 11,
”0146290921”,129,”8000010002FFFF”
OK
Note: Display locations with text field starting
with 0001 UCS2 character
+CME ERROR: 22
Note: Entry not found. The string has a
wrong UCS2 format, it is therefore
considered as an ASCII string

Write phonebook entry +CPBW
Description:
This command writes a phonebook entry in location number  in the current phonebook
memory storage. “RC” and “MC” phonebooks could be only erased by +CPBW. Adding field
and/or modifying field is not allowed for these phonebooks. This command is not allowed for
“EN”, “LD”, “MC”, “RC”, “MT”, and “SN” phonebooks, which can not be written.

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Chapter 8 – Phonebook Commands

Syntax:
Command syntax: AT+CPBW=[,[,[,]]]
Command
AT+CPBW=?
Note: Test command

AT+CPBW= 3
Note: Erase location 3
AT+CPBW=5,”112”,129,”
SOS”
Note: Write at location 5
AT+CPBW=5,”01290917”
,129,”Jacky”
Note: Overwrite location 5
AT+CPBW=6,”01292349”
,129,”8000410042”
Note: write location 6
(UCS2 format for the
 field)
AT+CPBW=,”+33145221
100”,145,”SOS”
Note: Write at the first
location available
AT+CPBW=,”034522110
0”,129,”SOS”
Note: Write at the first
location available
AT+CPBW=57,”112”,129,
”WM”
Note: Write at location 57
(wrong)
AT+CPBW=7,”01234567
8901234567890”,129,”W
AVE”
Note: Write at location 7 a
phone number exceeding
the limit (21 digits)
AT+CPBW=7,”01223344
55”,129,”WAVECOM
TEL”
Note: Write at location 7
along text (11 characters)
AT+CPBW=8,”01292349”
,129,”80xyz”
Note: write location

Possible responses
+CPBW: (1-50),20,(129,145),10
OK
Note: 50 locations, phone number = 20
digits max, TON/NPI of 129 or 145, text
length = 10
OK
Note: Location 3 erased
OK
Note: Location 5 written
OK
Note: Location 5 overwritten
OK
Note: Location 6 is written

OK
Note: First location available is written

+CME ERROR: 20
Note: Phonebook full

+CME ERROR: 21
Note: Invalid index

+CME ERROR: 26
Note: Phone number too long

+CME ERROR: 24
Note: Text too long

OK
Note: Location 8 is written. The string
has a wrong UCS2 format, it is
therefore considered as an ASCII string

When the fixed dialing phonebook (FDN) is locked, this command is not allowed. When the FDN
is unlocked, PIN2 is required to write in the FDN phonebook. But if PIN2 authentication has
been performed during the current session, the +CPBW command with FDN is allowed.

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Chapter 8 – Phonebook Commands

Command
AT+CPBS=”FD”
Note: Choose FDN
AT+CPBW=5,”01290917”,129,”Jacky”
Note: Write in FDN at location 5
AT+CPIN?
AT+CPIN=5678
Note: Enter SIM PIN2
AT+CPBW=5,”01290917”,129,”Jacky”
Note: Write in FDN at location 5

Possible responses
OK
+CME ERROR: 17
Note: SIM PIN2 is required
SIM PIN2
Note: SIM PIN2 is required
OK
OK
Note: Writing in FDN is now
allowed

Defines values:



Note:



integer type value depending on the capacity of the phonebook memory.
phone number in ASCII format.
TON/NPI (Type of address octet in integer format).

for the  parameter, all values are allowed from 0 to 255, but the MSB will be set
to 1 in all cases (ex: a  value of 17 will be written as 145).
string type.

Note:

For the  parameter all strings starting with “80” , “81” or “81” are considered in
UCS2 format. See the APPENDIX E (Coding of Alpha fields in the SIM for UCS2).

Note:

The +CSCS (Select Character set) command does not affect the format for phonebook
entries.

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Phonebook phone search +CPBP
Description:
This specific command orders the product to search the phonebook for an item with the same
phone number as that defined in the parameter.

Syntax:
Command syntax:

AT+CPBP=

 is coded like any GSM 07.07 or GSM 07.05 phone number.
Command
AT+CPBP=”+331290101”
Note: Search entries corresponding to this phone
number
AT+CPBP=”+331290101”
Note: Search entries corresponding to this phone
number
AT+CPBP=”01290202”
Note: Search entries corresponding to this phone
number
AT+CPBP=”+331288575”
Note: Search entries corresponding to this phone
number

AT+CPBP=”0129”
Note: Search entries corresponding to this phone
number

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CPBP: 15,”+331290101”,145,”Eric”
OK
Note: Display the entry corresponding to the specified
phone number
+CPBP: 15,”01290101”,129,”Eric”
OK
Note: Display the entry corresponding to the specified
phone number
+CPBP: 15,”+331290202”,145,”David”
OK
Note: Display the entry corresponding to the specified
phone number
+CPBP: 15,”+331290101”,145,”8045682344FFFF” (UCS2
format)
OK
Note: Display the entry corresponding to the specified
phone number
+CME ERROR: 22
Note: Entry not found

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Chapter 8 – Phonebook Commands

Move action in phonebook +CPBN
Description:
This specific command instructs the product to make a forward or backward move in the
phonebook (in alphabetical order). This command is not allowed for the “EN” phonebook - which
does not contain alphanumeric fields.

Syntax:
Command syntax:

AT+CPBN=

Command
AT+CPBN=?
Note: Test command
AT+CPBN=0
Note: Read the first location
AT+CPBN=2
Note: Read the next location
AT+CPBN=2
Note: Read the next location
AT+CPBN=3
Note: Read the previous location
AT+CPBN=1
Note: Read the last location
AT+CPBN=2
Note: Read the next location

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CPBN: (0-5)
OK
Note: Possible modes
+CPBN: 15,”+331290101”,145,”Eric”
OK
Note: Display the first location
+CPBN: 5,”+33147658987”,145,”Frank”
OK
Note: Display the second location
+CPBN: 6,”+331290302”,145,”Marc”
OK
Note: Display the third location
+CPBN: 5,”+33147658987”,145,”Frank”
OK
Note: Display the second location
+CPBN: 6,”+331290302”,145,”Marc”
OK
Note: Display the last location
+CPBP: 15,”+331290101”,145,”Eric”
OK
Note: Display the first location

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Chapter 8 – Phonebook Commands

Using mode 4 and 5 with +CPBF command and CPBW:
Command
AT+CPBF=”Er”
Note: Find ”Er” in phonebook
AT+CPBN=2
Note: Read the next location
AT+CPBF=”Er”
Note: Find ”Er” in phonebook
AT+CPBN=4
Note: Get the last location read
AT+CPBW=,”0146290800”,129,”WM”
Note: Write an item at the first location available
AT+CPBN=4
Note: Get the last location read

AT+CPBN=4
Note: Get the last item read
AT+CPBF=”800041FFFF”
Note: Find”800041” in phonebook
AT+CPBN=4
Note: Get the last location read

Note:

Possible responses
+CPBF: 15,”+331290101”,145,”Eric”
OK
Note: Display the location
+CPBN: 5,”+33147658987”,145,”Frank”
OK
Note: Display the following location
+CPBF: 15,”+331290101”,145,”Eric”
OK
Note: Display the location
+CPBF: 15,”+331290101”,145,”Eric”
OK
Note: Display the last location read
OK
Note: No information about this location
+CPBF: 15,”+331290101”,145,”Eric”
OK
Note: Display the last location read
AT+CPBN=38,”0146290800,129,”WM”
Note: Display the last item written with its location
AT+CPBN=38,”0146290800,129,”WM”
Note: Now the last item read is the last written item too
+CPBF: 15,”+3312345”,145,”8000414339FFFF”
OK
Note: Display this location
+CPBF: 15,”+3312345”,145,”8000414339FFFF”
OK
Note: Display the last location read

The AT+CPBN=5 command is useful after an AT+CPBW command used without a
location.

Defined values:

0: First item
1: Last item
2: Next valid item in alphabetical order
3: Previous valid item in alphabetical order
4: Last item read (usable only if a read operation has been performed on the current phonebook
since the end of initialization (+WIND: 4))
5: Last item written (usable only if a write operation has been performed on the current
phonebook since the end of initialization (+WIND: 4))

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Subscriber number +CNUM
Description:
This command returns the subscriber MSISDN(s). If the subscriber has different MSISDNs for
different services, each MSISDN is returned in a separate line.

Syntax:
Command syntax: AT+CNUM
Response syntax: +CNUM: , ,   +CNUM: ,
,  ….
Command
AT+CNUM
Note: Get MSISDN(s)
AT+CNUM=?

Possible responses
+CNUM:”Phone”, “0612345678”,129
+CNUM:”Fax”, “0687654321”,129
+CNUM: “80001002FFFF”, “+0183773”, 145 (UCS2 format)
Note: MSISDNs
OK

Defined values:




optional alphanumeric string associated with 
string type phone number with format as specified by 
type of address byte in integer format

Avoid phonebook init +WAIP
Description:
This specific command allows the initialization of all phonebooks to be inhibited during
subsequent boots.

Syntax:
Command syntax:

AT+WAIP=

Command
AT+WAIP?
Note: Current values ?
AT+WAIP=?
Note: Possible values ?
AT+WAIP =1
Note: Inhibit initialization of
phonebooks (next boot)
AT&W
Note: Save modifications in
EEPROM

Possible responses
+WAIP:0
OK
Note: Default value (init phonebooks)
+WAIP: (0,1)
OK
Note: Disable / enable
OK
Note: no answer

Caution: The given value should be stored in EEPROM. Therefore, the AT&W command must
be used to save the new  value.

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Chapter 8 – Phonebook Commands

Note:

No phonebook commands are allowed if +WAIP=1 (after boot). If a phonebook
command is entered, a “+CME ERROR: 3” is returned.

Defined values:

0: Normal initialization (with phonebooks)
1: No phonebook initialization

Delete Calls Phonebook +WDCP
Description:
This specific command deletes the calls listed in some phonebooks.

Syntax:
Command syntax:

AT+WDCP=

Command
AT+WDCP?
AT+WDCP=?
Note: Possible values ?
AT+WDCP=”LD”
Note: Delete all the content of Last Dialing phonebook.

Possible responses
OK
+WDCP: ("LD","MC","RC")
OK
Note: Identifiers of the phonebooks
supporting a list of calls
OK
Note: Last Dialing phonebook is now
empty.

Defined values:

“LD”: SIM (ME extended) Last dialing phonebook
“MC”: ME missed calls list phonebook
“RC”: ME received calls list phonebook

Set Voice Mail Number +CSVM
Description:
This commands sets/gets and enables/disables the voice mail number in memory.

Syntax:
Command syntax:

AT+CSVM=[,[,]]

Command
AT+CSVM?
Note: Get mail number
AT+CSVM=?
Note: Possible values ?
AT+CSVM=0,”888”,129
Note: Disable Voice Mail number and change
value to “888”.

Multi-Tech Systems, Inc. PN S000293A

Possible responses
+CSVM: 1,”660”,129
OK
Note: Voice mail number “660” is activated
+CSVM: (0-1),(129,145)
OK
Note: activation/deactivation and format 129 & 145 are
supported
OK

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Chapter 8 – Phonebook Commands

Defined values:

0: Disable the voice mail number
1: Enable the voice mail number

Phone number in ASCII format.

TON/NPI (Type of address byte in integer format).
Note:

For the  parameter, all values are allowed from 0 to 255, but the MSB will be set
to 1 in all cases (ex: a  value of 17 will be written as 145).

Multi-Tech Systems, Inc. PN S000293A

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Chapter 9 – Short Messages Commands

CHAPTER 9 - SHORT MESSAGES COMMANDS
Parameters definition


Destination Address, coded like GSM Technical Specification 03.40 TP-DA Data Coding Scheme, coded like in document [5]. Discharge Time in string format: “yy/MM/dd,hh:mm:ss±zz”(Year [00-99], Month [01-12], Day [01-31], Hour, Minute, Second and Time Zone [quarters of an hour] ) First Octet, coded like SMS-SUBMIT first octet in document [4], default value is 17 for SMS-SUBMIT Place of storage in memory. Text mode (+CMGF=1): number of characters PDU mode (+CMGF=0): length of the TP data unit in octets Memory used to list, read and delete messages (+CMGL, +CMGR and +CMGD). Memory used to write and send messages (+CMGW, +CMSS). CBM Message Identifier. Message Reference. Originator Address. Protocol Identifier. For SMS: GSM 04.11 SC address followed by GSM Technical Specification 03.40 TPDU in hexadecimal format, coded as specified in doc [4] For CBS: GSM Technical Specification 03.41 TPDU in hexadecimal format Recipient Address. Service Center Address Service Center Time Stamp in string format: “yy/MM/dd,hh:mm:ss±zz” (Year/Month/Day,Hour:Min:Seconds±TimeZone) CBM Serial Number Status of a SMS-STATUS-REPORT Status of message in memory. Type-of-Address of . Type-of-Address of . Type-of-Address of . Number of message locations in . Number of messages locations in . Total number of messages locations in Command Possible responses AT+CSMS=0 +CSMS: 1,1,1 OK Note: SMS-MO, SMS-MT and SMS-CB supported +CSMS: 1,1,1 Note: SMS-MO, SMS-MT and SMS-CB supported +CSMS: 0,1,1,1 OK Note: GSM 03.40 and 03.41 (SMS AT command Phase 2 version 4.7.0 +CSMS: (0,1) OK Note: SMS AT command Phase 2 version 4.7.0 AT+CSMS=1 Note: SMS AT command Phase 2 + AT+CSMS? Note: Current values ? AT+CSMS=? Note: Possible services Defined values: 0: SMS AT commands are compatible with GSM 07.05 Phase 2 version 4.7.0. 1: SMS AT commands are compatible with GSM 07.05 Phase 2 + version . New Message Acknowledgement +CNMA Description: This command allows reception of a new message routed directly to the TE to be acknowledged. In TEXT mode, only positive acknowledgement to the network (RP-ACK) is possible. In PDU mode, either positive (RP-ACK) or negative (RP-ERROR) acknowledgement to the network is possible. Acknowledge with +CNMA is possible only if the +CSMS parameter is set to 1 (+CSMS=1) when a +CMT or +CDS indication is shown (see +CNMI command). If no acknowledgement occurs within the network timeout, an RP-ERROR is sent to the network. The and parameters of the +CNMI command are then reset to zero (do not show new message indication). Syntax: Command syntax in text mode: AT+CNMA Command syntax in PDU mode: AT+CNMA [ = [ , [ PDU is entered ] ] ] Multi-Tech Systems, Inc. PN S000293A 57 Chapter 9 – Short Messages Commands Note: PDU is entered using format instead of format (e.g.. SMSC address field is not present). Example of acknowledgement of a new message in TEXT mode Command AT+CMGF=1 Note: Set TEXT mode AT+CNMI=2,2,0,0,0 Note: =2 Possible responses OK Note: TEXT mode valid OK AT+CNMA Note: acknowledge the message received AT+CNMA Note: try to acknowledge again +CMT: “123456”,”98/10/01,12:30 00+00”,129,4 ,32,240, “15379”,129,5 Received message Note: message received OK Note: send positive acknowledgement to the network +CMS ERROR: 340 Note: no +CNMA acknowledgment expected Example of acknowledgement of a new message in PDU mode: Command Possible responses AT+CMGF=0 Note: Set PDU mode OK Note: PDU mode valid +CMT: ,29 07913366003000F1240B913366920547F3000000300341 9404800B506215D42ECFE7E17319 Note: message received OK Note: send a negative acknowledgement to the network (RP-ERROR) with PDU message ( format). AT+CNMA=2, … Pdu message … Note: negative acknowledgement for the message. Defined values: : Type of acknowledgement in PDU mode 0: send RP-ACK without PDU (same as TEXT mode) 1: send RP-ACK with optional PDU message 2: send RP-ERROR with optional PDU message : Length of the PDU message Multi-Tech Systems, Inc. PN S000293A 58 Chapter 9 – Short Messages Commands Preferred Message Storage +CPMS Description: This command allows the message storage area to be selected (for reading, writing, etc). Syntax: Command syntax: AT+CPMS=,[] Command AT+CPMS=? Note: Possible message storages AT+CPMS? Note: Read AT+CPMS=”AM” Note: Select false message storage AT+CPMS=”BM” Note: Select CBM message storage AT+CPMS? Note: Read Possible responses +CPMS: ((“SM”,”BM”,”SR”),(“SM”)) OK Note: Read, list, delete: SMS, CBM or SMS Status Report Write, send: SMS +CPMS: “SM”,3, 10,”SM”,3,10 OK Note: Read, write…SMS from/to SIM 3 SMS are stored in SIM. 10 is the total memory available in SIM +CMS ERROR: 302 +CPMS: 2,20,3,10 OK Note: Read, list, delete CBM from RAM 2 CBM are stored in RAM +CPMS: “BM”,2,20,”SM”,3,10 OK Note: Read list, delete CBM from RAM Write SMS to SIM Defined values: : Memory used to list, read and delete messages. It can be: -“SM”: SMS message storage in SIM (default) -“BM”: CBM message storage (in volatile memory). -“SR”: Status Report message storage (in SIM if the EF-SMR file exists, otherwise in the ME non volatile memory) Note: “SR” ME non-volatile memory is cleared when another SIM card is inserted. It is kept, even after a reset, while the same SIM card is used. : Memory used to write and send messages - “SM” : SMS message storage in SIM (default). If the command is correct, the following message indication is sent: +CPMS: ,,, When is selected, all following +CMGL, +CMGR and +CMGD commands are related to the type of SMS stored in this memory. Multi-Tech Systems, Inc. PN S000293A 59 Chapter 9 – Short Messages Commands Preferred Message Format +CMGF Description: The message formats supported are text mode and PDU mode. In PDU mode, a complete SMS Message including all header information is given as a binary string (in hexadecimal format). Therefore, only the following set of characters is allowed: {‘0’,’1’,’2’,’3’,’4’,’5’,’6’,’7’,’8’,’9’, ‘A’, ‘B’,’C’,’D’,’E’,’F’}. Each pair or characters are converted to a byte (e.g.: ‘41’ is converted to the ASCII character ‘A’, whose ASCII code is 0x41 or 65). In Text mode, all commands and responses are in ASCII characters. The format selected is stored in EEPROM by the +CSAS command. Syntax: Command syntax: AT+CMGF Command AT+CMGF ? Note: Current message format AT+CMGF=? Note: Possible message format Possible responses +CMGF: 1 OK Note: Text mode +CMGF: (0-1) OK Note: Text or PDU modes are available Example, sending an SMS Message in PDU mode: Command AT+CMGF=0 Note: Set PDU mode AT+CMGS=14 0001030691214365000004C9E9340B Note: Send complete MSG in PDU mode, no SC address Possible responses OK Note: PDU mode valid +CMGS: 4 OK Note: MSG correctly sent, is returned Defined values: The message is composed of the SC address (« 00 means no SC address given, use default SC address read with +CSCA command) and the TPDU message. In this example, the length of octets of the TPDU buffer is 14, coded as GSM Technical Specification 03.40 . In this case the TPDU is: 0x01 0x03 0x06 0x91 0x21 0x43 0x65 0x00 0x00 0x04 0xC9 0xE9 0x34 0x0B, which means regarding GSM 03.40: (TP-MR) (TP-DA) (TP-PID) (TP-DCS) (TP-UDL) TP-UD 0x01 (SMS-SUBMIT, no validity period) 0x03 (Message Reference) 0x06 0x91 0x21 0x43 0x65 (destination address +123456) 0x00 (Protocol Identifier) 0x00 (Data Coding Scheme: 7 bits alphabet) 0x04 (User Data Length, 4 characters of text) 0xC9 0xE9 0x34 0x0B (User Data: ISSY) TPDU in hexadecimal format must be converted into two ASCII characters, e.g. octet with hexadecimal value 0x2A is presented to the ME as two characters ‘2’ (ASCII 50) and ‘A’ (ASCII 65). Multi-Tech Systems, Inc. PN S000293A 60 Chapter 9 – Short Messages Commands Save Settings +CSAS Description: All settings specified by the +CSCA and +CSMP commands are stored in EEPROM if the SIM card is a Phase 1 card or in the SIM card if it is a Phase 2 SIM card. Syntax: Command syntax: AT+CSAS Command AT+CSAS Note: Store +CSAS and +CSMP parameters Possible responses OK Note: Parameters saved Restore settings +CRES Description: All settings specified in the +CSCA and +CSMP commands are restored from EEPROM if the SIM card is Phase 1 or from the SIM card if it is a Phase 2 SIM card. Syntax: Command syntax: AT+CRES Command Possible responses AT+CRES Note: Restore +CSAS and +CSMP parameters OK Note: Parameters restored Show text mode parameters +CSDH Description: This command gives additional information on text mode result codes. This information is given in brackets in the +CMTI, +CMT, +CDS, +CMGR, +CMGL commands. Syntax: Command syntax: AT+CSDH Command AT+CSDH? Note: Current value Multi-Tech Systems, Inc. PN S000293A Possible responses +CSDH: 0 OK Note: Do not show header values 61 Chapter 9 – Short Messages Commands New message indication +CNMI Description: This command selects the procedure for message reception from the network. Syntax: Command syntax: AT+CNMI=,,,, Command AT+CNMI=2,1,0,0,0 Note: =1 AT+CNMI=2,2,0,0,0 Note: =2 AT+CNMI=2,0,0,1,0 Note: =1 Message to send Note: Send a message in text mode Possible responses OK AT+CMTI: “SM”,1 Note: message received OK +CMT: “123456”,”98/10/01,12:30 00+00”,129,4 ,32,240, “15379”,129,5 message received Note: message received OK +CMGS: 7 OK Note: Successful AT+CMGS=”+33146290800” transmission +CDS: 2, 116, ”+33146290800”, 145, “98/10/01,12:30:07+04”, “98/10/01 12:30:08+04”, 0 Note: message was correctly delivered Defined values: : controls the processing of unsolicited result codes Only =2 is supported. Any other value for (0,1 or 3) is accepted (return code will be OK), but the processing of unsolicited result codes will be the same as with=2. 0: Buffer unsolicited result codes in the TA. If TA result code buffer is full, indications can be buffered in some other place or the oldest indications may be discarded and replaced with the new received indications 1: Discard indication and reject new received message unsolicited result codes when TA-TE link is reserved. Otherwise forward them directly to the TE 2: Buffer unsolicited result codes in the TA when TA-TE link is reserved and flush them to the TE after reservation. Otherwise forward them directly to the TE 3: Forward unsolicited result codes directly to the TE. TA-TE link specific inband used to embed result codes and data when TA is in on-line data mode : sets the result code indication routing for SMS-DELIVERs. Default is 0. Multi-Tech Systems, Inc. PN S000293A 62 Chapter 9 – Short Messages Commands 0: No SMS-DELIVER indications are routed. 1: SMS-DELIVERs are routed using unsolicited code: +CMTI: “SM”, 2: SMS-DELIVERs (except class 2 messages) are routed using unsolicited code: +CMT: [,] (PDU mode) or +CMT: ,[,] [,, , , , , , ] (text mode) 3: Class 3 SMS-DELIVERS are routed directly using code in =2 ; Message of other classes result in indication =1 : set the rules for storing received CBMs (Cell Broadcast Message) types depend on its coding scheme, the setting of Select CBM Types (+CSCB command) and . Default is 0. 0: No CBM indications are routed to the TE. The CBMs are stored. 1: The CBM is stored and an indication of the memory location is routed to the customer application using unsolicited result code: +CBMI: “BM”, 2: New CBMs are routed directly to the TE using unsolicited result code. +CBM: (PDU mode) or +CBM:,,,,(Text mode) 3: Class 3 CBMs: as =2. Other classes CBMs: as =1. for SMS-STATUS-REPORTs. Default is 0. 0: No SMS-STATUS-REPORTs are routed. 1: SMS-STATUS-REPORTs are routed using unsolicited code: +CDS: (PDU mode) or +CDS: ,, [] , [], ,
, (Text mode) 2: SMS-STATUS-REPORTs are stored and routed using the unsolicited result code: +CDSI: “SR”, Default is 0. 0: TA buffer of unsolicited result codes defined within this command is flushed to the TE when 1…3 is entered (OK response shall be given before flushing the codes) 1: TA buffer of unsolicited result codes defined within this command is cleared when 1…3 is entered. Read message +CMGR Description: This command allows the application to read stored messages. The messages are read from the memory selected by +CPMS command. Syntax: Command syntax: AT+CMGR= Response syntax for text mode: +CMGR:,,[,] [,,, ,,,,] (for SMS-DELIVER only) +CMGR: ,,[,] [,,,,, [], , ,] (for SMS-SUBMIT only) Multi-Tech Systems, Inc. PN S000293A 63 Chapter 9 – Short Messages Commands +CMGR: ,,,[],[],,
, (for SMS-STATUS-REPORT only) Response syntax for PDU mode: +CMGR: , [] , A message read with status “REC UNREAD” will be updated in memory with the status “REC READ”. Note: The parameter for SMS Status Reports is always “READ”. Example: Command AT+CMGR=1 Note: Read the message AT+CMGR=1 Note: Read the message again AT+CMGR=2 Note: Read at a wrong index AT+CMGF=0 ;+CMGR=1 Note: In PDU mode Multi-Tech Systems, Inc. PN S000293A Possible responses AT+CMTI: “SM”,1 Note: New message received +CMGR: “REC UNREAD”,”0146290800”, ”98/10/01,18:22:11+00”, ABCdefGHI OK +CMGR: “REC UNREAD”,”0146290800”, ”98/10/01,18:22:11+00”, ABCdefGHI OK Note: Message is read now +CMS ERROR: 321 Note: Error: invalid index +CMGR: 2,, OK Note: Message is stored but unsent, no field 64 Chapter 9 – Short Messages Commands Command AT+CMGF=1;+CPMS=”SR”;+CNMI=,,,2 Reset to text mode, set read memory to “SR”, and allow storage of further SMS Status Report into “SR” memory AT+CMSS=3 Send an SMS previously stored AT+CMGR=1 Read the SMS Status Report Possible responses OK +CMSS: 160 OK +CDSI: “SR”,1 New SMS Status Report stored in “SR” memory at index 1 +CMGR: "READ",6,160, "+33612345678",129,"01/05/31,15:15:09+00", "01/05/31,15:15:09+00",0 OK List message +CMGL Description: This command allows the application to read stored messages, by indicating the type of the message to read. The messages are read from the memory selected by the +CPMS command. Syntax: Command syntax: AT+CMGL= Response syntax for text mode: +CMGL: ,,[,], [, , ] (for SMS-DELIVER and SMS-SUBMIT, may be followed by other +CMGL:…) +CMGL: ,,,,[],[],,
, (for SMS-STATUSREPORT only, may be followed by other +CMGL:…) Response syntax for PDU mode: +CMGL: ,, [], (for SMS-DELIVER, SMSSUBMIT and SMS-STATUS-REPORT, may be followed by other +CMGL:…) Multi-Tech Systems, Inc. PN S000293A 65 Chapter 9 – Short Messages Commands Command AT+CMGL=“REC UNREAD” Note: List unread messages in text mode AT+CMGL=”REC READ” Note: List read messages in text mode AT+CMGL=”STO SENT” Note: List stored and sent messages in text mode AT+CMGL=1 Note: List read messages in PDU mode Possible responses +CMGL: 1,”REC UNREAD”,”0146290800”, Unread message ! +CMGL: 3,”REC UNREAD”, “46290800”, Another message unread! OK Note: 2 messages are unread, these messages will then have their status changed to “REC READ” (+CSDH:0) +CMGL: 2,”REC READ”,”0146290800”, Keep cool OK OK Note: No message found +CMGL: 1,1,,26 07913366003000F3040B913366920547F4001300119041253 0400741AA8E5A9C5201 OK Defined values: possible values (status of messages in memory): Note: Text mode possible values PDU mode possible values Status of messages in memory “REC UNREAD” 0 received unread messages “REC READ” 1 received read messages “STO UNSENT” 2 stored unsent messages “STO SENT” 3 stored sent messages “ALL” 4 all messages For SMS Status Reports, only “ALL” / 4 and “READ” / 1 values of the parameter will list messages ; other values will only return OK. Multi-Tech Systems, Inc. PN S000293A 66 Chapter 9 – Short Messages Commands Send message +CMGS Description: The
field is the address of the terminal to which the message is sent. To send the message, simply type, character (ASCII 26). The text can contain all existing characters except and (ASCII 27). This command can be aborted using the character when entering text. In PDU mode, only hexadecimal characters are used (‘0’…’9’,’A’…’F’). Syntax: Command syntax in text mode: AT+CMGS= [ , ] text is entered Command syntax in PDU mode: AT+CMGS= PDU is entered Command AT+CMGS=”+33146290800” Please call me soon, Fred. Note: Send a message in text mode AT+CMGS= Note: Send a message in PDU mode Possible responses +CMGS: OK Note: Successful transmission +CMGS: OK Note: Successful transmission The message reference, , which is returned to the application is allocated by the product. This number begins with 0 and is incremented by one for each outgoing message (successful and failure cases); it is cyclic on one byte (0 follows 255). Note: This number is not a storage number. Outgoing messages are not stored. Write Message to Memory +CMGW Description: This command stores a message in memory (either SMS-SUBMIT or SMS-DELIVERS). The memory location is returned (no choice possible as with phonebooks +CPBW). Text or PDU is entered as described for the Send Message +CMGS command. Syntax: Command syntax in text mode: ( is returned in both cases) AT+CMGW= [, [, ] ] enter text Command syntax in PDU mode: AT+CMGW= [,] give PDU Response syntax: Multi-Tech Systems, Inc. PN S000293A 67 Chapter 9 – Short Messages Commands +CMGW: or +CMS ERROR: if writing fails Command Possible responses AT+CMGW=”+33146290800” Hello how are you ? Note: Write a message in text mode AT+CMGW= Note: Write a message in PDU mode +CMGW: 4 OK Note: Message stored in index 4 +CMGW: OK Note: Message stored in Defined values: Parameter Definition: : Originating or Destination Address Value in string format. : Type of Originating / Destination Address. : Integer type in PDU mode (default 2 for +CMGW), or string type in text mode (default “STO UNSENT” for +CMGW). Indicates the status of message in memory. If is omitted, the stored message is considered as a message to send. 0: “REC UNREAD” 1: “REC READ” 2: “STO UNSENT” 3: “STO SENT” : Length of the actual data unit in octets Send Message From Storage +CMSS Description: This command sends a message stored at location value . Syntax: Command syntax: AT+CMSS=[, [,] ] Response syntax: +CMSS: or +CMS ERROR: if sending fails If a new recipient address is given, it will be used instead of the one stored with the message Command AT+CMGW=0660123456 Today is my birthday Note: AT+CMSS=5, 0680654321 Note: Send the message 5 to a different destination number AT+CMSS=5, 0680654321 Note: Send the message 5 to a different destination number Multi-Tech Systems, Inc. PN S000293A Possible responses +CMGW: 5 OK Note:Message stored with index 5 AT+CMSS: OK Note: Successful transmission +CMSS: OK Note: Successful transmission 68 Chapter 9 – Short Messages Commands Set Text Mode Parameters +CSMP Description: This command selects a value for , , and . Syntax: Command syntax: AT+CSMP=, , , Command AT+CSMP? Possible responses +CSMP: 0,0,0,0 OK Note: No validity period = PCCP437 alphabet (8 bits à 7 bits) OK Note: Command correct Note: current values AT+CMPS=17,23,64,244 Note: = 23 (2 hours, relative format) = GSM 8 bits alphabet Defined values: The byte comprises 6 different fields: B7 RP B6 UDHI B5 SRR b4 VPF b3 b2 RD b1 MTI b0 RP: Reply Path, not used in text mode. UDHI: User Data Header Information, b6=1 if the beginning of the User Data field contains a Header in addition to the short message. This option is not supported in +CSMP command, but can be used in PDU mode (+CMGS). SRR: Status Report Request, b5=1 if a status report is requested. This mode is supported. VPF: Validity Period Format b4=0 & b3=0 -> field is not present b4=1 & b3=0 -> field is present in relative format Others formats (absolute & enhanced) are not supported. RD: Reject Duplicates, b2=1 to instruct the SC to reject an SMS-SUBMIT for an SM still held in the SC which has the same and the same as the previously submitted SM from the same . MTI: Message Type Indicator b1=0 & b0=0 -> SMS-DELIVER (in the direction SC to MS) b1=0 & b0=1 -> SMS-SUBMIT (in the direction MS to SC) In text mode is only coded in “relative” format. The default value is 167 (24 hours). This means that one octet can describe different values: VP value 0 to 143 144 to 167 168 to 196 197 to 255 Validity period value (VP + 1) x 5 minutes (up to 12 hours) 12 hours + ( (VP – 143) x 30 minutes ) (VP – 166) x 1 day (VP – 192) x 1 week is used to indicate the higher layer protocol being used or indicates interworking with a certain type of telematic device. For example, 0x22 is for group 3 telefax, 0x24 is for voice telephone, 0x25 is for ERMES. Multi-Tech Systems, Inc. PN S000293A 69 Chapter 9 – Short Messages Commands is used to determine the way the information is encoded. Compressed text is not supported. Only GSM default alphabet, 8 bit data and UCS2 alphabet are supported. Delete message +CMGD Description: This command deletes one or several messages from preferred message storage (“BM” SMS CB ‘RAM storage’, “SM” SMSPP storage ‘SIM storage’ or “SR” SMS Status-Report storage). Syntax: Command syntax: AT+CMGD= [,] Command AT+CMGR=3 Note: Read it AT+CMGD=3 Note: Delete it AT+CMGD=1,0 AT+CMGD=1,1 AT+CMGD=1,2 AT+CMGD=1,3 AT+CMGD=1,4 Possible responses +CMTI:”SM”,3 Note: New message received +CMGR: “REC UNREAD”,”0146290800”, “98/10/01,18:19:20+00” Message received! Note: Unread message received from 0146290800 on the 01/10/1998 at 18H19m 20s OK Note: Message deleted OK Note: The message from the preferred message storage at the location 1 is deleted OK Note: All READ messages from the preferred message storage are deleted OK Note: All READ messages and SENT mobile originated messages are deleted OK Note: All READ, SENT and UNSENT messages are deleted OK Note: All messages are deleted Defines values (1-20) 0 1 2 3 4 Note: When the preferred message storage is “BM” Integer type values in the range of location numbers of SIM Message memory when the preferred message storage is “SM” or “SR”. Delete message at location . Delete All READ messages Delete All READ and SENT messages Delete All READ, SENT and UNSENT messages Delete All messages. When the preferred message storage is “SR”, as SMS status reports are assumed to have a “READ” status, if is greater than 0, all SMS status reports will be deleted. Multi-Tech Systems, Inc. PN S000293A 70 Chapter 9 – Short Messages Commands Service center address +CSCA Description This command indicates which service center the message must be sent to. The product has no default value for this address. If the application tries to send a message without having indicated the service center address, an error will be generated. Therefore, the application must indicate the SC address when initializing the SMS. This address is then permanently valid. The application may change it if necessary. Syntax: Command syntax: AT+CSCA Command AT+CMGS= “+33146290800” Hello, how are you? Note: Send a message AT+CSCA=”0696741234” Note: Service center initialization AT+CMGS=”+33146290800” Happy Birthday ! Note: Possible responses +CMS ERROR: 330 Note: service center unknown OK Note: +CMGS: 1 OK Note: Successful transmission Select Cell Broadcast Message Types +CSCB Description: This command selects which types of CBMs are to be received by the ME. This command is allowed in both PDU and text modes. Syntax: Command syntax: AT+CSCB= , [ , [ ] ] The parameter of +CNMI command controls the message indication. Test read command (AT+CSCB ?) is not supported. The activation of CBM reception (=0) can select only specific Message Identifiers (list in ) for specific Languages (list in ), but the deactivation stops any reception of CBMs (only AT+CSCB=1 is allowed). Message Identifiers ( parameter) indicates which type of message identifiers the ME should listen to. Supported languages ( parameter) are: 0 for German, 1 for English, 2 for Italian, 3 for French, 4 for Spanish, 5 for Dutch, 6 for Swedish, 7 for Danish, 8 for Portuguese, 9 for Finnish, 10 for Norwegian, 11 for Greek, 12 for Turkish, 13 for Hungarian, 14 for Polish and 32 for Czech. Command AT+CSCB=0,”15-17,50,86”,”” Note: Accept SMS-CB types, 15,16,17,50 and 86 in any language +CBM: 10 00112233445566778899 Note: CBM length of a received Cell Broadcast message (SMS-CB), CBM bytes in PDU mode AOK Note: CBM reception is completely stopped Multi-Tech Systems, Inc. PN S000293A Possible responses OK Note: CBMs can be received AT+CSCB=1 Note: Deactivate the reception of CBMs 71 Chapter 9 – Short Messages Commands Cell Broadcast Message Identifiers +WCBM Description: This specific command reads the EF-CBMI SIM file. Note: The EF-CBMI file is not used with the +CSCB command. The application should read this file (using AT+WCBM ?) and combine the Message Identifiers with those required by the application. Syntax: Command syntax: AT+WCBM= Command AT+WCBM=”10,100,1000,10000” Note: Write 4 messages identifiers in EF-CBMI AT+WCBM? Note: Read the CBMIs in EF-CBMI Possible responses OK Note: CBMIs are stored in EF-CBMI +WCBM=”10,100,1000,100000” Note: 4 CBMIs are stored in EF-CBMI Message status modification +WMSC Syntax: Command syntax: AT+WMSC= , location number of the stored message (integer) new status to be stored, as for +CMGL command: PDU Mode 0 Text Mode “REC UNREAD” 1 2 3 “REC READ” “STO UNSENT” “STO SENT” Possible responses: OK +CMS ERROR: 321 +CMS ERROR: 302 Note: if the location is valid if is invalid or free if the new and the previous one are incompatible (1) The accepted status changes are from READ to NOT READ and vice versa, and from SENT to NOT SENT and vice versa. If all the parameters are correct, the product overwrites the whole SMS in SIM. Only the first byte (Status byte) is changed. Multi-Tech Systems, Inc. PN S000293A 72 Chapter 9 – Short Messages Commands Message overwriting +WMGO Description: The +CMGW command writes an SMS to the first location available. To write an SMS to a specified location, the +WMGO command forces the product to write an SMS (with the +CMGW command) to the location specified with +WMGO, but for just one +CMGW command. Syntax: Command syntax: AT+WMGO= location number of the SIM record to write or overwrite Possible responses: OK +CMS ERROR: 321 +WMGO: if is a valid SMS location, for AT+WMGO=? and for AT+WMGO? if is out of the SIM capacity range. for AT+WMGO? On the next AT+CMGW command, the record number used will be the one specified by the AT+WMGO command. The location is forgotten and, in order to perform a second overwrite, +WMGO has to be used again. If the external application specifies a free location, and if an incoming message is received before the AT+CMGW command, the product may store the incoming message at a location available. This could be the one specified by +WMGO (the product does not prevent from this). If the user then issues an AT+CMGW command without changing the AT+WMGO location, the new message will be overwritten. This location number is not kept over a software reset. Unchange SMS Status +WUSS Description: The +WUSS command changes the SMS Status to UNREAD after +CMGR or +CMGL. Syntax: Command syntax: : 1 : 0 AT+WUSS = The SMS Status will not change. The SMS Status will change. Possible responses: OK Multi-Tech Systems, Inc. PN S000293A 73 Chapter 10 – Supplementary Services Commands CHAPTER 10 - SUPPLEMENTARY SERVICES COMMANDS Call forwarding +CCFC Description: This commands allows control of the "call forwarding" supplementary service. Syntax: Command syntax: AT+CCFC= , [, [, [, [, [, [,