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AT Commands According to 3GPP TS 27.007

 

Command      Description
AT+CGMI Request manufacturer identification
AT+CGMM Request model identification
AT+CGMR Request TA revision identification of software release
AT+CGSN Request product serial number identification (identical with +GSN)
AT+CSCS Select TE character set
AT+CIMI Request international mobile subscriber identity
AT+CLCK Facility lock
AT+CMEE Report mobile equipment error
AT+COPS Operator selection
AT+CPAS Phone activity status
AT+CPIN Enter PIN
AT+CPWD Change password
AT+CRC Set cellular result codes for incoming call indication
AT+CREG Network registration
AT+CRSM Restricted SIM access
AT+CSQ Signal quality report
AT+CPOL Preferred operator list
AT+COPN Read operator names
AT+CFUN Set phone functionality
AT+CCLK Clock
AT+CSIM Generic SIM access
AT+CBC Battery charge
AT+CUSD Unstructured supplementary service data
AT+CNUM Subscriber Number

 

 

 

 

AT+CGMI     Request Manufacturer Identification

 

T) AT+CGMI=?

OK

E) AT+CGMI

TA returns manufacturer identification text.

<manufacturer>

 

OK

Parameters

<manufacturer>       The ID of manufacturer

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CGMM     Request Model Identification

  

T) AT+CGMM=?

OK

E) AT+CGMM

TA returns product model identification text.

<model>

 

OK

Parameters

<model>       Product model identification text

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CGMR     Request TA Revision Identification Of Software Release

 

T) AT+CGMR=?

OK

E) AT+CGMR

TA returns product software version identification text.

Revision: <revision>

 

OK

Parameters

<revision>       Product software version identification text

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CGSN     Request Product Serial Number Identification

 

T) AT+CGSN=?

OK

E) AT+CGSN

see +GSN

<sn>

 

OK

Parameters

<sn>       International mobile equipment identity (IMEI)

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CSCS     Select TE Character Set

 

T) AT+CSCS=?

+CSCS: (list of supported <chset>s)

OK

Parameters

<chset>    

“GSM”     GSM 7 bit default alphabet (3GPP TS 23.038);

“UCS2”     16-bit universal multiple-octet coded character set (ISO/IEC10646);

UCS2 character strings are converted to hexadecimal numbers from 0000 to FFFF;

e.g. “004100620063” equals three 16-bit characters with decimal values 65, 98 and 99

“IRA”     International reference alphabet (ITU-T T.50)

R) AT+CSCS?

+CSCS: <chset>

 

OK

Parameters

See Test Command

W) AT+CSCS=<chset>

Sets which character set <chset> are used by the TE.

The TA can then convert character strings correctly between the TE and ME character sets.

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Test Command

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CIMI     Request International Mobile Subscriber Identity

  

T) AT+CIMI=?

OK

E) AT+CIMI

TA returns <IMSI>for identifying the individual SIM which is attached to ME.

<IMSI>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<IMSI>

International Mobile Subscriber Identity (string without double quotes)

Parameter Saving Mode NO_SAVE
Max Response Time 20s

 

 

 

 

AT+CLCK     Facility Lock

 

T) AT+CLCK=?

+CLCK: (list of supported <fac>s)

 

OK

Parameters

See Write Command

W) AT+CLCK=<fac>,<mode>[,<passwd>[,<class> ]]

This Command is used to lock, unlock or interrogate a ME or a network facility <fac>.

Password is normally needed to do such actions.

When querying the status of a network service (<mode>=2) the response line for ‘not active’

case (<status>=0) should be returned only if service is not active for any <class>.

 

If <mode>≠2 and Command is successful

OK

If <mode>=2 and Command is successful

+CLCK: <status>[,<class1>[<CR><LF>+CLCK:

<status>,<class2>[…]]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<fac>

“AB”     All Barring services(only for <mode>=0)

“AC”     All inComing barring services(only for <mode>=0)

“AG”     All outGoing barring services(only for <mode>=0)

“AI”     BAIC (Barr All Incoming Calls)

“AO”     BAOC (Barr All Outgoing Calls)

“IR”     BIC- Roam (Barr Incoming Calls when Roaming outside the home country)

“OI”     BOIC (Barr Outgoing International Calls)

“OX”     BOIC- exHC (Barr Outgoing International Calls except to Home Country)

“SC”     SIM (lock SIM/UICC card) (SIM/UICC asks password in MT power-up and when this lock

command issued) Correspond to PIN1 code.

“FD”     SIM card or active application in the UICC (GSM or USIM) fixed dialling memory feature

(if PIN2 authentication has not been done during the current session,

PIN2 is required as <passwd>)

“PN”     Network Personalization, Correspond to NCK code

“PU”     Network subset Personalization Correspond to NSCK code

“PP”     Service Provider Personalization Correspond to SPCK code

<mode>

0     unlock

1     lock

2     query status

<passwd> String type (Shall be the same as password specified for the facility from the MT user

interface or with command Change Password +CPWD)

<class>       1-255

1     Voice (telephony)

2     Data refers to all bearer services;

with <mode>=2 this may refer only to some bearer service if TA does not support values 16, 32,

64 and 128)

4     Fax (facsimile services)

7     All classes

<status>

0     Not active

1     Active

Parameter Saving Mode NO_SAVE
Max Response Time 15s

Reference

3GPP TS 27.007 [14]

Note

CME errors if SIM not inserted or PIN is not entered.

 

 

 

 

AT+CMEE     Report Mobile Equipment Error

  

T) AT+CMEE=?

+CMEE: (list of supported <n>s)

 

OK

Parameters

See Write Command

R) AT+CMEE?

+CMEE: <n>

 

OK

Parameters

See Write Command

W) AT+CMEE=[<n>]

TA disables or enables the use of result code +CME ERROR: <err> as an indication of an error

relating to the functionality of the ME.

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<n>      

0     Disable +CME ERROR: <err> result code and use ERROR instead.

1     Enable +CME ERROR: <err> result code and use numeric <err>

2     Enable +CME ERROR: <err> result code and use verbose <err> values

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+COPS     Operator Selection

 

T) AT+COPS=?

TA returns a list of quadruplets, each representing an operator present in the network.

Any of the formats may be unavailable and should then be an empty field.

The list of operators shall be in order: home network, networks referenced in SIM,

and other networks.

 

+COPS: (list of supported<stat>,long alphanumeric<oper>,short alphanumeric<oper>,

numeric <oper>,<netact>)s[,,(list of supported <mode>s),(list of supported <format>s)]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

R) AT+COPS?

TA returns the current mode and the currently selected operator.

If no operator is selected,<format> and <oper> are omitted.

+COPS: <mode>[,<format>,<oper>,<netact>]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

W) AT+COPS=<mode>,[<format>[,<oper>]]

TA forces an attempt to select and register the GSM network operator.

If the selected operator is not available, no other operator shall be selected (except <mode>=4).

The selected operator name format shall apply to further read commands (AT+COPS?).

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<stat>         

0     Unknown

1     Operator available

2     Operator current

3     Operator forbidden

<oper>     Refer to [27.007]

operator in format as per <format>

<mode>      

0     Automatic mode; <oper> field is ignored

1     Manual (<oper> field shall be present, and <AcT> optionally)

2     manual deregister from network

3     set only <format> (for read Command +COPS?) – not shown in Read Command response

4     Manual/automatic (<oper> field shall be present); if manual selection fails, automatic

mode (<mode>=0) is entered

<format>    

0     Long format alphanumeric <oper>

1     Short format alphanumeric <oper>

2     Numeric <oper>; GSM Location Area Identification number

<netact>     

0     User-specified GSM access technology

1     GSM compact

3     GSM EGPRS

7     User-specified LTE M1 A GB access technology

9     User-specified LTE NB S1 access technology

Parameter Saving Mode AUTO_SAVE
Max Response Time

Test command: 45 seconds

Write command: 120 seconds

 

 

 

 

AT+CPAS     Phone Activity Status

  

T) AT+CPAS=?

+CPAS: (list of supported <pas>s)

 

OK

Parameters

See Execution Command

E) AT+CPAS

TA returns the activity status of ME.

+CPAS: <pas>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<pas>

0         Ready (MT allows commands from TA/TE)

3         Ringing (MT is ready for commands from TA/TE, but the ringer is active)

4         Call in progress (MT is ready for commands from TA/TE, but a call

is in progress)

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CPIN     Enter PIN

  

T) AT+CPIN=?

OK

R) AT+CPIN?

TA returns an alphanumeric string indicating whether some password is required or not.

+CPIN: <code>

 

OK

Parameters

<code>

READY     MT is not pending for any password

SIM PIN     MT is waiting SIM PIN to be given

SIM PUK     MT is waiting for SIM PUK to be given

PH_SIM PIN     ME is waiting for phone to SIM card (antitheft)

PH_SIM PUK     ME is waiting for SIM PUK (antitheft)

SIM PIN2     PIN2, e.g. for editing the FDN book possible only if preceding Command was

acknowledged with +CME ERROR:17

SIM PUK2 Possible only if preceding Command was acknowledged with error

+CME ERROR: 18.

W) AT+CPIN=<pin>[,<new pin>]

TA stores a password which is necessary before it can be operated

(SIM PIN, SIM PUK, PH- SIM PIN, etc.).

If the PIN required is SIM PUK or SIM PUK2, the second pin is required.

This second pin <new pin>, is used to replace the old pin in the SIM.

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<pin>            

String type; password

<new pin>        

String type; If the PIN required is SIM PUK or SIMPUK2:

new password

Parameter Saving Mode NO_SAVE
Max Response Time 5s

 

 

 

 

AT+CPWD      Change Password

  

T) AT+CPWD=?

TA returns a list of pairs which present the available facilities and the maximum length of their password.

+CPWD: (list of supported <fac>s, list of supported <pwdlength>s)

 

OK

Parameters

<fac>     See Write Command

<pwdlength>     Integer max. length of password

W) AT+CPWD=<fac>,<oldpwd>,<newpwd>

TA sets a new password for the facility lock function.

OK

Parameters

<fac>

“AB”     All Barring services

“AC”     All inComing barring services(only for <mode>=0)

“AG”     All outGoing barring services(only for <mode>=0)

“AI”     BAIC (Barr All Incoming Calls)

“AO”     BAOC (Barr All Outgoing Calls)

“IR”     BIC- Roam (Barr Incoming Calls when Roaming outside the home country)

“OI”     BOIC (Barr Outgoing International Calls)

“OX”     BOIC- exHC (Barr Outgoing International Calls except to Home Country)

“SC”     SIM (lock SIM/UICC card) (SIM/UICC asks password in MT power-up and when this lock

command issued) Correspond to PIN1 code.

“P2”     SIM PIN2

<oldpwd>    

String type (string should be included in quotation marks): password specified for the facility

from the user interface or with command.

If an old password has not yet been set,<oldpwd> is not to enter.

<newpwd>    

String type (string should be included in quotation marks): new password

Parameter Saving Mode NO_SAVE
Max Response Time 15s

 

 

 

 

AT+CRC     Set Cellular Result Codes For Incoming Call Indication

 

T) AT+CRC=?

+CRC: (list of supported <mode>s)

 

OK

Parameters

See Write Command

R) AT+CRC?

+CRC: <mode>

 

OK

Parameters

See Write Command

W) AT+CRC=[<mode>]

TA controls whether or not the extended format of incoming call indication is used.

OK

Parameters

<mode>      

0     Disable extended format

1     Enable extended format Omitted Use previous value

Unsolicited Result Code

When enabled, an incoming call is indicated to the TE with unsolicited result code

+CRING: <type> instead of the normal RING.

Parameters

<type>        

ASYNC     Asynchronous transparent

SYNC     Synchronous transparent

REL ASYNC     Asynchronous non-transparent

REL SYNC     Synchronous non-transparent

FAX     Facsimile

VOICE     Voice

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CREG     Network Registration

  

T) AT+CREG=?

+CREG: (list of supported <n>s)

 

OK

Parameters

See Write Command

R) AT+CREG?

TA returns the status of result code presentation and an integer <stat> which shows whether the

network has currently indicated the registration of the ME.

Location information elements <lac> and <ci> are returned only when <n>=2 and ME is

registered in the network.

+CREG: <n>,<stat>[,<lac>,<ci>,<netact>]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

W) AT+CREG[=<n>]

TA controls the presentation of an unsolicited result code +CREG: <stat>

when <n>=1 and there is a change in the ME network registration status.

OK

Parameters

<n>             

0     Disable network registration unsolicited result code

1     Enable network registration unsolicited result code

+CREG: <stat>

2     Enable network registration unsolicited result code with location information

(2 is only for 7000 series module which support GPRS.)

CREG: <stat>[,<lac>,<ci>,<netact>]

<stat>        

0     Not registered, MT is not currently searching a new operator to register to

1     Registered, home network

2     Not registered, but MT is currently searching a new operator to register to

3     Registration denied

4     Unknown

5     Registered, roaming

<lac>     String type (string should be included in quotation marks);

two byte location area code in hexadecimal format

<ci>     String type (string should be included in quotation marks);

two byte cell ID in hexadecimal format

<netact>     

0     User-specified GSM access technology

1     GSM compact

3     GSM EGPRS

7     User-specified LTE M1 A GB access technology

9     User-specified LTE NB S1 access technology

Unsolicited Result Code

If <n>=1 and there is a change in the MT network registration status

+CREG: <stat>

If <n>=2 and there is a change in the MT network registration status or a change of the network

cell:

+CREG: <stat>[,<lac>,<ci>,<netact>]

Parameters

See Write Command

 

 

 

 

AT+CRSM     Restricted SIM Access

 

T) AT+CRSM=?

OK

W) AT+CRSM=<Command>[,<fileId>[,<P1>,<P2>,<P3>[,<data>]]]

+CRSM: <sw1>,<sw2>[,<response>]

 

OK ERROR

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<Command>

176     READ BINARY

178     READ RECORD

192     GET RESPONSE

214     UPDATE BINARY

220     UPDATE RECORD

242     STATUS

All other values are reserved; refer GSM 11.11.

<fileId>  

Integer type; this is the identifier for an elementary data file on SIM.

Mandatory for every Command except STATUS

<P1>,<P2>,<P3>   

Integer type, range 0 – 255

Parameters to be passed on by the ME to the SIM; refer GSM 11.11.

<data>     Information which shall be written to the SIM (hex-decimal character format)

<sw1>,<sw2>    

Integer type, range 0 – 255

Status information from the SIM about the execution of the actual Command.

These parameters are delivered to the TE in both cases, on successful or failed execution of the Command;

refer GSM 11.11.

<response>        

Response of a successful completion of the Command previously issued (hexadecimal character format)

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CSQ     Signal Quality Report

 

T) AT+CSQ=?

+CSQ: (list of supported <rssi>s),(list of supported <ber>s)

 

OK

E) AT+CSQ

+CSQ: <rssi>,<ber>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Execution Command returns received signal strength indication <rssi> and channel bit error

rate <ber> from the ME.

Test Command returns values supported by the TA.

Parameters

<rssi>

0     – 115 dBm or less

1     – 111 dBm

2…30      – 110… – 54 dBm

31     – 52 dBm or greater

99     not known or not detectable

<ber>      

(in percent):

0…7     As RXQUAL values in the table in GSM 05.08 [20] subclause 7.2.4

99     Not known or not detectable

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CPOL     Preferred Operator List

 

T) AT+CPOL=?

+CPOL: (list of supported <index>s),(list of supported <format>s)

 

OK

Parameters

See Write Command

R) AT+CPOL?

+CPOL:

<index1>,<format>,<oper1>[,<GSM>,<GSM_compact>,<UTRAN>,<E-UTRAN>][<CR><LF>+CPOL:

<index2>,<format>,<oper2>[,<GSM,<GSM_compact>,<UTRAN>,<E-UTRAN>][…]]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

W) AT+CPOL=<index>[,<f ormat>[,<oper>[<GSM

>,<GSM_compact>,<UTRAN>,<E-UTRAN>]]]

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<index>     Integer type: order number of operator in SIM preferred operator list

<format>     Indicates whether alphanumeric or numeric format used (see +COPS Command)

0     Long format alphanumeric <oper>

1     Short format alphanumeric <oper>

2     Numeric <oper>

<oper>     String type(string should be included in quotation marks)

<GSM>     GSM access technology

0     Access technology is not selected

1     Access technology is selected

<GSM_compact>     GSM compact access technology

0     Access technology is not selected

1     Access technology is selected

<UTRAN>     UTRAN access technology

0     Access technology is not selected

1     Access technology is selected

<E-UTRAN>     E-UTRAN access technology

0     Access technology is not selected

1     Access technology is selected

 

 

 

 

AT+COPN     Read Operator Names

  

T) AT+COPN=?

OK

E) AT+COPN

+COPN: <numeric1>,<alpha1> [<CR><LF>+COPN: <numeric2>,<alpha2> […]]

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<numericn> String type (string should be included in quotation marks):

operator in numeric format (see +COPS)

<alphan>     String type (string should be included in quotation marks): 

operator in long alphanumeric format (see +COPS)

Parameter Saving Mode NO_SAVE

 

 

 

 

AT+CFUN     Set Phone Functionality

 

T) AT+CFUN=?

+CFUN: (list of supported <fun>s),(list of supported <rst>s)

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

R) AT+CFUN?

+CFUN: <fun>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

W) AT+CFUN=<fun>[,<rst>]

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<fun>

0     Minimum functionality

1     Full functionality (Default)

4     Disable phone both transmit and receive RF circuits.

5     Factory Test Mode

6     Reset

7     Offline Mode

<rst>

0     Do not Reset the MT before setting it to <fun> power level.

1     Reset the MT before setting it to <fun> power level.

Max Response Time 10s

Reference

3GPP TS 27.007 [13]

Note

The <fun> power level will be written to flash except minimum functionality.

AT+CFUN=1,1 can be used to reset module purposely at minimum/full functionality mode.

Response string “OK” will be returned after module resets if baud rate

is set to fixed baud rate.

 

 

 

 

AT+CCLK     Clock

  

T) AT+CCLK=?

OK

R) AT+CCLK?

+CCLK: <time>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

See Write Command

W) AT+CCLK=<time>

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<time>       String type(string should be included in quotation marks) value; format is

“yy/MM/dd,hh:mm:ss±zz”, where characters indicate year (two last digits),month, day, hour,

minutes, seconds and time zone (indicates the difference, expressed in quarters of an hour,

between the local time and GMT; range -47…+48). E.g. 6th of May 2010, 00:01:52 GMT+2 hours

equals to “10/05/06,00:01:52+08”.

Parameter Saving Mode AUTO_SAVE

Reference

3GPP TS 27.007 [13]

Note

Only time zone is auto saved.

 

 

 

 

AT+CSIM     Generic SIM Access

 

T) AT+CSIM=?

OK

W) AT+CSIM=<length>,<Command>

+CSIM: <length>,<response>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<length>     Integer type: length of characters sent to the TE in

<Command> or <response> (i.e. twice the number of octets in the raw data).

<Command>     String type (string should be included in quotation marks):

hex format: GSM 11.11 SIM Command sent from the ME to the SIM.

<response>     

String type(string should be included in quotation marks):

hex format: GSM 11.11 response from SIM to <Command>.

Parameter Saving Mode NO_SAVE

Reference

3GPP TS 27.007 [13]

Note

 

 

 

 

AT+CBC     Battery Charge

 

T) AT+CBC=?

+CBC: (list of supported <bcs>s),(list of supported <bcl>s),(<voltage>)

 

OK

Parameters

See Execution Command

E) AT+CBC

+CBC: <bcs>,<bcl>,<voltage>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<bcs>     Charge status

0     ME is not charging

1     ME is charging

2     Charging has finished

<bcl>     Battery connection level

1…100     battery has 1- 100 percent of capacity remaining vent

<voltage>     Battery voltage(mV)

Parameter Saving Mode NO_SAVE

Reference

3GPP TS 27.007 [13]

Note

 

 

 

 

AT+CUSD     Unstructured Supplementary Service Data

  

T) AT+CUSD=?

+CUSD: (list of supported <n>s)

 

OK

Parameters

See Write Command

R) AT+CUSD?

+CUSD: <n>

 

OK

Parameters

See Write Command

W) AT+CUSD=<n>,<str>,<dcs>

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<n> A numeric parameter which indicates control of the unstructured supplementary service

data

0     disable the result code presentation in the TE

1     enable the result code presentation in the TE

2     cancel session (not applicable to read Command response)

<str>     String type (string should be included in quotation marks) USSD-string

<dcs>     Cell Broadcast Data Coding Scheme in integer format (default 0)

Parameter Saving Mode NO_SAVE

Reference

GSM 03.38 [25]

Note

When ussd is not suport or return error,TE will print +CUSD:4.

 

 

 

 

AT+CNUM     Subscriber Number

  

T) AT+CNUM=?

OK

E) AT+CNUM

+CNUM: “”,<number1>,<type1>

 

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameters

<numberx>     String type (string should be included in quotation marks) phone number of format specified

by <typex>

<typex>     Type of address octet in integer format (refer GSM04.08[8] subclause 10.5.4.7)

Parameter Saving Mode NO_SAVE

 

 

 

 

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