Fibocom G600 User manual

G600 GPRS Module
AT Command User Manual
Version: V1.2.5
Date: 2010-06-11

G600 GPRS Module AT Command User Manual Page 2 of 238
Confidential Material
This document contains information highly confidential to Shenzhen G&T Industrial Development Co.,
Ltd (Fibocom). Fibocom offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Fibocom. Theinformation provided is based upon
requirements specifically provided to Fibocom by the customers. All specifications supplied herein are
subject to change. Disclosure of this information to other parties is prohibited without the written
consent of G&T.
Copyright
Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its
contents and communication thereof to others without express authorization are prohibited. Offenders
will be held liable for payment of damages. All rights created by patent grant or registration of a utility
model or design patent are reserved.
Copyright ©1999-2010 Shenzhen G&T Industrial Development Co., Ltd. All rights reserved.
Revision History
Version Date Remarks
V1.2.5
2010-06-11
Modify few mistake description about AT command:
+CA; +MOIC; +MOID; +WRIM;
+MIPCLOSE; +MIPKPAL; +MIPODM
V1.2.4
2010-05-12
Modify few mistake description about AT command:
+CSVM; +CSCA; +IPR; +MMAD; +CGDCONT;
+MIPOPEN; +MPING; +IFC
V1.2.3
2010-03-30
Modify few mistake description about AT command:
+VTD; +MIPSETS; +MIPSEND; +CMUX; S7; S12;
+CSVM; +MAVOL
V1.2.2
2010-02-28
Modify few mistake description in Datasheet
V1.2.1
2010-02-08
Add AT+MTSM command
Delete AT+EPIN command
Delete AT+TCLCC command
Modify few mistake description in Datasheet
V1.2.0
2010-01-15
Software version: 07.00.02
V1.1.0
2008-08-01
Software version: 06.03.05
V1.0.0
2008-07-29
Initial Release
Software version: 05.02.02

G600 GPRS Module AT Command User Manual Page 3 of 238
Trademarks Notice
The FIBOCOM Logo is registered by Shenzhen G&T Industrial Development Co., Ltd. All other product
or service names or logos are the property of their respective owners.
Copyright ©1999-2010 Shenzhen G&T Industrial Development Co., Ltd. All rights reserved.

Contents
G600 GPRS Module AT Command User Manual Page 4 of 238
Contents
1Preface...............................................................................................................................................................................10
1.1 Manual Scope.........................................................................................................................10
1.2 Target Audience......................................................................................................................10
2Introduction to AT Commands............................................................................................................................................11
2.1 AT Commands Overview .......................................................................................................11
2.2 General System Abbreviations ..............................................................................................11
2.3 AT Commands Protocol .........................................................................................................11
2.4 AT Commands Structure........................................................................................................12
2.4.1 General Symbols Used in AT Commands Description.................................................12
2.4.2 Command Structure........................................................................................................12
2.4.3 Results Code Structure...................................................................................................13
2.5 Command Syntax...................................................................................................................13
3Modem ID...........................................................................................................................................................................14
3.1 +CGMI, +GMI, +FMI, Request Manufacturer ID...................................................................14
3.2 +CGMM, +GMM, +FMM, Request Model ID ........................................................................14
3.3 +CGMR, +GMR, +FMR, Request Revision..........................................................................15
3.4 +CGSN, +GSN, Request Product Serial Number Identification..........................................15
3.5 +CSCS, Select Terminal Character Set ................................................................................16
3.6 +CIMI, Request IMSI..............................................................................................................17
3.7 +CFSN, Read Factory Serial Number...................................................................................17
3.8 I, Request Identification Information......................................................................................18
3.9 +CNUM, Request MSISDN(s)...............................................................................................18
3.10 +CLAC, List of All Available AT Commands..........................................................................19
4Modem Control and Status.................................................................................................................................................20
4.1 Modem Register Commands.................................................................................................20
4.1.1 V, G600 Response Format.............................................................................................20
4.1.2 Q, Result Code Suppression..........................................................................................21
4.1.3 E, Command Echo..........................................................................................................21
4.1.4 X, Result Code Selection and Call Progress Monitoring Control.................................22
4.1.5 S, Bit Map Registers .......................................................................................................23
4.1.6 S2.....................................................................................................................................24
4.1.7 S12...................................................................................................................................25
4.1.8 &V, View Configuration...................................................................................................25
4.1.9 &F, Set to Factory Defined Configuration......................................................................26
4.1.10 Z, Reset to Default Configuration...................................................................................27
4.1.11 &W, Store User Profile....................................................................................................27

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G600 GPRS Module AT Command User Manual Page 5 of 238
4.1.12 &Y, Default User Profile..................................................................................................28
4.1.13 +CRSM, Restricted SIM Access ....................................................................................29
4.1.14 +CCID..............................................................................................................................33
4.2 Sleep Mode Commands ........................................................................................................33
4.2.1 S24, Set Number of Seconds Delay Before G600 Enters Sleep Mode.......................34
4.3Error Handling Commands ....................................................................................................35
4.3.1 +CMEE, Report Mobile Equipment Error ......................................................................35
4.3.2 +CEER, Extended Error Report.....................................................................................36
5Call Control.........................................................................................................................................................................37
5.1 Managing a CSD (Data) Call .................................................................................................37
5.1.1 Simple Dialing .................................................................................................................37
5.1.2 Switching From Data Mode to Command Mode...........................................................37
5.1.3 Hanging Up .....................................................................................................................38
5.2 Receiving a Data Call.............................................................................................................38
5.3 Call Control AT Commands....................................................................................................38
5.3.1 D, Dial Command............................................................................................................38
5.3.2 D>, Direct Dialing from Phone Books ............................................................................39
5.3.3 DL, Dial Last Number .....................................................................................................41
5.3.4 H, Hang-up Call...............................................................................................................42
5.3.5 A, Answer Incoming Call.................................................................................................43
5.3.6 +CRC, Cellular Result Codes and RING, +CRING - Incoming Call Indication............44
5.3.7 +CLIP, Calling Line Identification ...................................................................................46
5.3.8 +CLIP Indication..............................................................................................................47
5.3.9 +CCWA, Call Waiting Command ...................................................................................48
5.3.10 +CCWAIndication...........................................................................................................49
5.3.11 +CHLD, Call Related Supplementary Services Command ..........................................51
5.3.12 +CCFC, Call Forwarding Number and Conditions........................................................53
5.3.13 +CLIR, Calling Line Identification Restriction................................................................55
5.3.14 +CBST, Select Bearer Service Type..............................................................................57
5.3.15 O, Return to Online Data State.......................................................................................59
5.3.16 +CHUP, Hang Up Call.....................................................................................................60
5.3.17 +MDC, Selection of Desired Message to Be Displayed Upon Connection of a Voice
Call 60
5.3.18 +MHUP, G600 Hung UP call ..........................................................................................61
5.4 Call Status Messages.............................................................................................................62
5.4.1 +CPAS, Phone Activity Status ........................................................................................62
5.4.2 +CLCC, List Current Calls..............................................................................................63
5.4.3 +MCST, Call Status Messages.......................................................................................66
5.4.4 +MCST Indication ...........................................................................................................66
5.5 Call Advice of Charge Commands ........................................................................................67

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G600 GPRS Module AT Command User Manual Page 6 of 238
5.5.1 +CAOC, Advice of Charge..............................................................................................68
5.5.2 +CACM, Accumulated Call Meter ..................................................................................70
5.5.3 +CAMM, Accumulated Call Meter Maximum.................................................................71
5.5.4 +CPUC, Price per Unit and CurrencyTable ..................................................................72
5.5.5 +CR, Service Reporting Control.....................................................................................73
5.6 Supplementary Services ........................................................................................................74
5.6.1 +CSSN, Supplementary Service Notifications ..............................................................74
5.6.2 +CUSD, Unstructured Supplementary Service Data ....................................................77
5.6.3 +COLP, Connected Line Identification Presentation.....................................................81
6Phone and Date Books and Clock .....................................................................................................................................83
6.1 Directory Access Commands - Phone Book.........................................................................83
6.1.1 +CPBS, Select Phone Book Memory ............................................................................83
6.1.2 +CPBR, Read Phone Book Entries ...............................................................................84
6.1.3 +CPBF, Find Phone Book Entries..................................................................................86
6.1.4 +CPBW, Write Phone Book Entry..................................................................................87
6.1.5 +CSVM, Set Voice Mail Server ......................................................................................89
6.2 System Date and Time Access Commands..........................................................................90
6.2.1 +CCLK, Read/Set System Date and Time ....................................................................90
7Chapter 5: SMS..................................................................................................................................................................93
7.1 SMS Commands ....................................................................................................................93
7.1.1 +CSMS, Select Message Service..................................................................................93
7.1.2 +CPMS, Preferred Message Storage ............................................................................94
7.1.3 +CMGF, Message Format ..............................................................................................95
7.1.4 +CSCA, Service Center Address ...................................................................................96
7.1.5 +CSMP, Set Text Mode Parameters ........................................................................... 100
7.1.6 +CSDH, Show Text Mode Parameters ....................................................................... 102
7.1.7 +CNMI, New Message Indications to Terminal .......................................................... 103
7.1.8 +CNMA, New Message Acknowledgment.................................................................. 106
7.1.9 +CMTI, Unsolicited Response (New SMS-DELIVER Receipt Indication)................ 108
7.1.10 +CMT, Unsolicited Response (New SMS-DELIVER Receipt)................................... 108
7.1.11 +CBM, Unsolicited Response (New CB Message Receipt).......................................110
7.1.12 +CDSI, Unsolicited Response (New SMS-STATUS-REPORT Indication) ................110
7.1.13 +CDS, Unsolicited Response (New SMS-STATUS-REPORT Receipt).....................111
7.1.14 +CMGL, +MMGL, List Messages.................................................................................112
7.1.15 +CMGR, Read Message ..............................................................................................116
7.1.16 +CMSS, Send Message From Storage ...................................................................... 122
7.1.17 +CMGW, Write Message to Memory .......................................................................... 123
7.1.18 +CMGD, Delete Message ........................................................................................... 129
7.1.19 +CGSMS, Select Service for MO SMS Messages .................................................... 130
7.1.20 +CMGS, Send SM to Network .................................................................................... 131

Contents
G600 GPRS Module AT Command User Manual Page 7 of 238
7.1.21 +CSCB, Cell Broadcast Messages ............................................................................. 132
8Access and security.........................................................................................................................................................135
8.1 Access Control Commands ................................................................................................ 135
8.1.1 A/, Repeat Last Command.......................................................................................... 135
8.1.2 AT, Check AT Communication..................................................................................... 135
8.1.3 +CPIN, Enter PIN for Unlocking SIM Card or Enter PUK for Unblocking SIM Card 136
8.1.4 +TPIN, Query Number of Remaining SIM PIN/PUK Entering Attempts ................... 138
8.1.5 +CPWD, Change Password........................................................................................ 139
8.1.6 +CLCK, Facility Lock ................................................................................................... 141
9Network............................................................................................................................................................................145
9.1 Network Commands............................................................................................................ 145
9.1.1 +CSQ, Signal Strength ................................................................................................ 145
9.1.2 +CRLP, Radio Link Protocol........................................................................................ 145
9.1.3 +CREG, Network Registration Status ......................................................................... 146
9.1.4 +CGREG, GPRS Network Registration...................................................................... 148
9.1.5 +COPS, Operator Selection ........................................................................................ 149
9.1.6 +CPOL, Preferred Operators ...................................................................................... 152
9.1.7 +CBAND, Change Radio Band................................................................................... 155
9.1.8 +MCELL, G600 Cell Description................................................................................. 156
9.1.9 +MCELL Indication....................................................................................................... 157
9.1.10 +MCI, G600 Cell Information....................................................................................... 158
9.1.11 +MCI Indication............................................................................................................ 160
9.1.12 +CA Indication.............................................................................................................. 160
10 Fax Class 2......................................................................................................................................................................162
11 Hardware Information.......................................................................................................................................................163
11.1 Hardware Information Commands ..................................................................................... 163
11.1.1 +CBC, Battery Charger Connection............................................................................ 163
11.1.2 +CBAUD, Baud Rate Regulation ................................................................................ 163
11.1.3 +IPR, Local Terminal Serial Port Rate........................................................................ 164
11.1.4 +GCAP, Request Overall Capabilities......................................................................... 166
11.1.5 &K, RTS/CTS Flow Control......................................................................................... 166
11.1.6 +IFC, RTS/CTS Flow Control...................................................................................... 167
11.1.7 &C, Circuit 109 Behavior ............................................................................................. 168
11.1.8 &D, Circuit 108 Behavior ............................................................................................. 169
11.1.9 +CFUN, Shut Down Phone Functionality ................................................................... 170
11.1.10 +ICF, DTE-DCE Character Framing.................................................................... 172
11.1.11 +MRST, Perform Hardware power down ............................................................ 173
11.1.12 +MMAD, Query and Monitor ADC Value............................................................. 174
11.1.13 +MTSM, Temperature Sensor Measurement...................................................... 174
11.1.14 +MIOC, I/O Configure .......................................................................................... 177

Contents
G600 GPRS Module AT Command User Manual Page 8 of 238
11.1.15 +MIOD, I/O Define................................................................................................ 179
11.1.16 +WRIM, RI signal width setting............................................................................ 181
12 Audio................................................................................................................................................................................183
12.1 Scope................................................................................................................................... 183
12.2 General Audio Commands.................................................................................................. 183
12.2.1 +CRSL, Call Ringer Level ........................................................................................... 183
12.2.2 +CLVL, Loudspeaker Volume...................................................................................... 184
12.2.3 +CMUT, Mute/Unmute Microphone Path.................................................................... 184
12.2.4 S94, Sidetone Effect .................................................................................................... 185
12.2.5 S96, Echo Canceling ................................................................................................... 186
12.2.6 +CALM, Alert Sound Mode.......................................................................................... 186
12.2.7 +CRTT, Ring Type Selection....................................................................................... 187
12.2.8 +VTD, Tone Duration ................................................................................................... 188
12.2.9 +VTS, Command-Specific Tone Duration................................................................... 189
12.2.10 +MAPATH, Audio Path ......................................................................................... 189
12.2.11 +MAVOL, Volume Setting .................................................................................... 191
12.2.12 +MAMUT, Input Devices Mute............................................................................. 193
12.2.13 +MATONE，Start or stop the tone play .............................................................. 194
12.2.14 + MMICG, Microphone Gain Value...................................................................... 196
12.2.15 + MMICV, Microphone Voltage Value.................................................................. 197
13 Multiplexer Feature...........................................................................................................................................................198
13.1 +CMUX, MUX Startup Command....................................................................................... 198
14 GPRS...............................................................................................................................................................................200
14.1 GPRS Functionality............................................................................................................. 200
14.2 GPRS Commands............................................................................................................... 200
14.2.1 +CGCLASS, GPRS Mobile Station Class .................................................................. 200
14.2.2 +CGDCONT, Define PDP Context.............................................................................. 201
14.2.3 +CGQMIN, Quality of Service Profile (Min Acceptable)............................................. 204
14.2.4 +CGQREQ, Quality of Service Profile (Requested)................................................... 205
14.2.5 +CGATT, GPRS Attach or Detach............................................................................... 207
14.2.6 D*99, Request GPRS Service "D" .............................................................................. 208
14.2.7 +CGACT, PDP Context Activate or Deactivate .......................................................... 210
14.2.8 +CGPADDR, GPRSADDResses.................................................................................211
15 TCP/IP..............................................................................................................................................................................213
15.1.1 +MIPCALL, Create a Wireless Link ............................................................................ 213
15.1.2 +MIPOPEN, Open a Socket (UDP or TCP)................................................................ 214
15.1.3 +MIPCLOSE, Close a Socket ..................................................................................... 217
15.1.4 +MIPSETS, Set Size and Timeout for Automatic Push ............................................. 218
15.1.5 +MIPSEND, Send Data ............................................................................................... 220
15.1.6 +MIPPUSH, Push Data into Protocol Stack ............................................................... 221

Contents
G600 GPRS Module AT Command User Manual Page 9 of 238
15.1.7 +MIPFLUSH, Flush Data from Buffers........................................................................ 222
15.1.8 +MIPRUDP, Receive Data from UDP Protocol Stack ................................................ 223
15.1.9 +MIPRTCP, Receive Data from TCP Protocol Stack ................................................. 224
15.1.10 +MIPSTAT, Status Report .................................................................................... 224
15.1.11 +MIPCONF - Configure Internal TCP/IP stack ................................................... 225
15.1.12 +MPING, Start Ping Execution (ICMP Protocol) ................................................. 228
15.1.13 +MPINGSTAT, Status Update for +MPING Execution........................................ 231
15.1.14 +MSDNS, Set DNS IP Address ........................................................................... 233
15.1.15 +MIPKPAL, TCP heartbeat setting ...................................................................... 234
15.1.16 +MIPODM, Open a Socket (UDP or TCP) in Online Data Mode....................... 236

Preface
G600 GPRS Module AT Command User Manual Page 10 of 238
1 Preface
1.1 Manual Scope
This manual introduces the G600 AT command set, and describes how software developers
can use these commands to communicate with the G600 device, and to create software
applications that communicate with the G600 using these commands.
Note: The integrator should read the corresponding SW release notes for the G600 version
he is using to get information about differences from this manual.
1.2 Target Audience
This manual is intended for software developers who communicate with the G600 device using
the AT commands, and create applications to communicate with the G600 device using the AT
commands.

Introduction to AT Commands
G600 GPRS Module AT Command User Manual Page 11 of 238
2 Introduction to AT Commands
2.1 AT Commands Overview
AT commands are sets of commands used for communication with the G600 cellular modem.
AT commands are comprised of assemblies of ASCII characters which start with the "AT" prefix
(except the commands A/ and +++). The AT prefix is derived from the word Attention, which asks
the modem to pay attention to the current request(command).
AT commands are used to request services from the G600 cellular modem, such as:
Call services: dial, answer and hang up
Cellular utilities: send/receive SMS
Modem profiles: Auto Answer
Cellular Network queries: GSM signal quality
2.2 General System Abbreviations
The basic system configuration contains a modem and a terminal.
The G600 is the modem and may be referred to as the DCE or TA, such as the phone, the
mobile or the radio.
The terminal (PC or MCU) may be referred to as the DTE or the TE.
2.3 AT Commands Protocol
The AT commands interface is basically a Modem Services Upon Request.
Communication (almost) always begins from the TE side. This means that any service should
be requested from the TE. Thus a request is called a "Command".
Each command must be answered by a "Results code" from the TA. The results code reports
the command status to the TE. Some commands may include several "Results code" to send data
back to the TE. Some commands may initiate a mode in which, when specified events are
generated in the G600, "Indicator" messages are sent data asynchronously. The “indicators” can
be called “Unsolicited results code”.
The G600 can echo characters received from the TE (commands) back to the TE.
TE
TA (G600)
Command
Results code

Introduction to AT Commands
G600 GPRS Module AT Command User Manual Page 12 of 238
2.4 AT Commands Structure
2.4.1 General Symbols Used in AT Commands Description
The following syntax definitions apply in this chapter:
Syntax
Definition
<CR>
Carriage returns character, specified by the value of the S3-register.
<LF>
Line-feed character, specified by the value of the S4-register.
<…>
Name enclosed in angle brackets is a syntax element. The brackets
themselves do not appear in the command line.
[...]
Optional sub-parameter of a command or an optional part of terminal
information response, enclosed in square brackets. The brackets
themselves do not appear in the command line. When the sub-parameter is
not provided in the parameter type commands, the new value equals its
previous value. In action type commands, the action should be performed
on the basis of the recommended default setting of the sub-parameter.
//
Denotes a comment, and should not be included in the command.
2.4.2 Command Structure
Each AT command has the "AT" or “at” prefix string (except the commands A/ and +++).
Each AT command has the suffix <CR> (except the commands A/ and +++).
Example:
TE
TA (G600)
Command
Results code
TE
TA (G600)
Unsolicited resultscode

Introduction to AT Commands
G600 GPRS Module AT Command User Manual Page 13 of 238
AT+CSQ<CR>
ATS24?<CR>
An AT command line may contain one or more commands. Delimiters are used to separate
the commands from each other. The delimiter is either a semicolon ";" or none, meaning space
(basic commands).
Example:
ATS0=1V1Q0E0<CR>
AT+IFC=0,0;+ICF=3,4;+CNMI=2,1,0,0,0<CR>
2.4.3 Results Code Structure
By default, the G600 responds with verbose response codes. The results code prefix is
<CR><LF>. The results code suffix is <CR><LF>.
Example:
<CR><LF>+CSQ: 99,99<CR><LF>
<CR><LF>OK<CR><LF>
The Unsolicited results code is same as the Results code.
2.5 Command Syntax
Execute command syntax
AT+xxx
ATxxx
ATxxx;
Parameter set command syntax
AT+xxx=<Value>
ATxxx=<Value>
Parameter read Command
syntax
AT+xxx?
ATxxx?
Parameter test Command
syntax
AT+ xxx =?
ATxxx?
<Value> consists of either a numeric constant or a string constant. <compound_value> consist
of several <value> parameters separated by commas.
Example of compound_value: <value1>,<value2>,…,<valueN>
Numeric Constants
Numeric constants are expressed in decimal, hexadecimal, or binary form. In the G600, the
definition of each command specifies which form is used for values associated with that command.
String Constants
String constants consist of a sequence of characters, bounded at the beginning and end by
the double-quote character (").

Modem ID
G600 GPRS Module AT Command User Manual Page 14 of 238
3 Modem ID
These commands allow the user to query the type of device that is attached, the technology
used in the device, as well as basic operating information about the G600.
3.1 +CGMI, +GMI, +FMI, Request Manufacturer ID
These commands display manufacturer identification. The G600 outputs a string containing
manufacturer identification information.
Command
Response/Action
AT+CGMI
AT+CGMI?
+CGMI: <manufacturer_ID>
OK
AT+GMI
AT+GMI?
+GMI: <manufacturer_ID>
OK
AT+FMI
AT+FMI?
+FMI: <manufacturer_ID>
OK
Example:
AT+CGMI
+CGMI: " Fibocom "
OK
3.2 +CGMM, +GMM, +FMM, Request Model ID
These commands request the model identification. The G600 outputs a string containing
information about the specific model, including a list of the supported technology used, and the
particular model number.
Command
Response/Action
AT+CGMM
AT+CGMM?
+CGMM: <list of supported technologies>,<model>
OK
AT+GMM
AT+GMM?
+GMM: <list of supported technologies>,<model>
OK
AT+FMM
AT+FMM?
+FMM: <list of supported technologies>,<model>
OK
Example:
AT+CGMM?

Modem ID
G600 GPRS Module AT Command User Manual Page 15 of 238
+CGMM: "EGSM900/1800”,”G600"
OK
The following table shows the+CGMM string parameters.
String
Description
"GSM900" EGSM at 900 MHz
"GSM1800"
DCS at 1800 MHz
3.3 +CGMR, +GMR, +FMR, Request Revision
These commands request the revision identification. The G600 outputs a string containing the
revision identification information of the software version contained within the device.
Command
Response/Action
AT+CGMR
AT+CGMR?
+CGMR: <revision>
OK
AT+GMR
AT+GMR?
+GMR: <revision>
OK
AT+FMR
AT+FMR?
+FMR: <revision>
OK
Example:
AT+CGMR
+CGMR: "0B.00.05"
OK
3.4 +CGSN, +GSN, Request Product Serial Number Identification
This command displays the product serial number identification IMEI (International Mobile
Equipment Identification). It can be used even when the SIM card is not inserted.
Command
Response/Action
AT+CGSN
AT+CGSN?
+CGSN: <imei>
OK
AT+GSN
AT+GSN?
+GSN: <imei>
OK

Modem ID
G600 GPRS Module AT Command User Manual Page 16 of 238
The following table shows the +CGSN, +GSN parameters.
<Parameter>
Description
<imei>
The IMEI (International Mobile Station Equipment Identity) number is
comprised of 15 digits, as specified by GSM 03.03 [3]. IMEI numbers
are composed of the following elements, all in decimal digits:
TypeApproval Code (TAC) - 6 digits
Serial Number (SNR) - 6 digits
Spare digit - 1 digit
The TAC and SNR are protected against unauthorized changes.
Example:
AT+CGSN?
+CGSN: 004400013805666
OK
3.5 +CSCS, Select Terminal Character Set
This command selects the G600 character set. The G600 supports the following character
sets: "IRA","GSM","UCS2","HEX". The default value is “IRA”.
Command
Syntax
Response/Action
Set
+CSCS=[<chset>]
OK
or:
+CMS ERROR: <err>
Read
+CSCS?
+CSCS: <selected character set>
OK
Test
+CSCS=?
+CSCS: (<supported character sets>)
OK
The following table shows the +CSCS parameter optional values.
<chset>
Character Set
“IRA”
International Reference Alphabet (ITU-T T.50)
“GSM”
GSM default alphabet (GSM 03.38 subclause 6.2.1)
"UCS2"
2-byte Universal Character Set, Unicode (ISO/IEC 10646 [32])
“HEX” Charater strings consist only of hexadecimal numbers from 00 to FF
Example:
AT+CSCS=?
+CSCS: ("IRA","GSM","UCS2","HEX")

Modem ID
G600 GPRS Module AT Command User Manual Page 17 of 238
OK
AT+CPBS="ME"
OK
AT+CPBW=1,"8475763000",129,"Lin Zhao"
OK
AT+CSCS="UCS2"
OK
AT+CPBR=1
+CPBR: 1,"8475763000",129,004C006E006E0020005A00680061006F
OK
3.6 +CIMI, Request IMSI
This command displays the International Mobile Subscriber Identity number.
Command
Response/Action
AT+CIMI
AT+CIMI?
+CIMI: <imsi>
OK
or:
+CME ERROR: <err>
Example:
AT+CIMI
+CIMI: 314566320021400
OK
3.7 +CFSN, Read Factory Serial Number
This command is used to query the factory serial number.
Command
Response/Action
AT+CFSN
AT+CFSN?
+CFSN: <fsn>
OK
Example:
AT+CFSN
+CFSN: 000000000
OK

Modem ID
G600 GPRS Module AT Command User Manual Page 18 of 238
3.8 I, Request Identification Information
This command displays various G600 information items.
Command
Response/Action
ATIn
<information item n>
or:
+CME ERROR: <err>
The following table shows the information items that are supported by the G600.
ATIn
Description
Output
Reference
ATI
Reserve
ATI0
Reserve
ATI1
Reserve
ATI2
Reserve
ATI3
Reports product
description
“GPRS Module”
ATI4
Reserve
ATI5
Reserve
ATI6 Reserve
ATI7
Reports product
description
"EGSM900/1800”
ATI8
Reports software version
“0B.00.05”
ATI9
Reserve
3.9 +CNUM, Request MSISDN(s)
This command displays up to 2 strings of text information that identify the G600. The output
string contains double quotes.
On SIM cards that have EFmsisdn file, the string(s) returned are the MSISDN numbers and
their associated data.
On SIM cards that don't have EFmsisdn file, the strings returned are the MSISDN numbers
and their associated data stored in G600 NVM.
Command
Response/Action
+CNUM
+CNUM?
(MSISDN supported)
+CNUM:
[<MSISDN1_string>],<MSISDN1>,<MSISDN1_type><CR><LF>
[+CNUM:
[<MSISDN2_string>],<MSISDN2>,<MSISDN2_type>]<CR><LF>
[...]
OK

Modem ID
G600 GPRS Module AT Command User Manual Page 19 of 238
+CNUM
+CNUM?
(MSISDN not
supported)
+CNUM: <phone_number>
OK
The following table shows the +CNUM parameters.
<Parameter>
Description
<MSISDN type>
Phone number type
129 Use for local call
145 Use “+” for international access code
128 Unknown
Example:
AT+CNUM?
+CNUM: "VoiceMail","098765432109876543210987654321",129
OK
3.10 +CLAC, List of All Available AT Commands
Command
Syntax
Response/Action
Remarks
Execute
+CLAC
List of available AT
commands
The Execute command displays a list of
all the AT commands supported by the
G600.

Modem Control and Status
G600 GPRS Module AT Command User Manual Page 20 of 238
4 Modem Control and Status
4.1 Modem Register Commands
The G600 holds certain data items in selected memory space, named Software Registers
(S-registers) and Modem Registers. Some of these registers are used as bitmaps, where one
register holds more than one data item.
All S-registers can be accessed using the S command, described in “S, Bit Map Registers”.
Some registers can also be accessed using dedicated commands, detailed below.
4.1.1 V, G600 Response Format
This command determines the response format of the data adapter and the contents of the
header and trailer transmitted with the result codes and information responses. This command also
determines whether the result codes are transmitted in a numeric or an alphabetic ("verbose") form.
The textportion of information responses is not affected by this setting.
The following table shows the effect that setting this parameter has on the format of
information text and result codes.
V0
V1
Information Responses
<ATV0><cr><lf>
<ATV1><cr><lf>
0 - "OK"
1 - "CONNECT"
2 - "RING"
3 - "NO CARRIER"
4 - "ERROR"
5 - "NO DIALTONE"
6 - "BUSY"
7 - "NO ANSWER"
<numeric code><cr>
<verbose
code><cr><lf>
Command
Syntax
Response/Action
Remarks
Set
ATV<value>
OK
or:
+CME ERROR: <err>
The Set command sets the
format of information responses
and result codes.
The following table shows the V parameters.
<Parameter> Description
<value>
0 Transmits limited headers and trailers, and numeric text.
1 Transmits full headers and trailers, and verbose response text.
The default value is 1.