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AT Commands According to V.25TER 

 

Command Description
A/ Re-issues the last command given
ATD Mobile originated call to dial a number
ATE Set command echo mode
ATH Disconnect existing connection
ATI Display product identification information
ATL Set monitor speaker loudness
ATM Set monitor speaker mode
+++ Switch from data mode or ppp online mode to command mode
ATO Switch from command mode to data mode
ATQ Set result code presentation mode
ATS0 Set number of rings before automatically answering the call
ATS3 Set command line termination character
ATS4 Set response formatting character
ATS5 Set command line editing character
ATS6 Pause before blind dialling
ATS7 Set number of seconds to wait for connection completion
ATS8 Set number of seconds to wait for comma dial modifier encountered in dial string of D command
ATS10 Set disconnect delay after indicating the absence of data carrier
ATV TA response format
ATX Set connect result code format and monitor call progress
ATZ Reset default configuration
AT&C Set DCD function mode
AT&D Set DTR function mode
AT&E Set CONNECT Result Code Format About Speed
AT+GCAP Request complete TA capabilities list
AT+GMI Request manufacturer identification
AT+GMM Request TA model identification
AT+GMR Request TA revision identification of software release
AT+GOI Request global object identification
AT+GSN Request TA serial number identification (IMEI)
AT+ICF Set TE-TA control character framing
AT+IPR Set TE-TA fixed local rate

 

 

 

 

A/     Re-issues the Last Command Given

(E) A/ Response: Re-issues the previous Command
Parameter Saving Mode NO_SAVE
  120000ms
Reference  

 

 

♦Example

A/

+GCAP:+CGSM,+FCLASS,+DS

OK

 

 

 

 

ATD     Mobile Originated Call to Dial A Number

This command can be used to set up outgoing data calls. It also serves to control supplementary services.

(E) ATD<n>[<mgsm>]

Response

If error is related to ME functionality

+CME ERROR: <err>

If no dial tone and (parameter setting ATX2 or ATX4)

NO DIALTONE

If busy and (parameter setting ATX3 or ATX4)

BUSY

If a connection cannot be established

NO CARRIER

If the remote station does not answer

NO ANSWER

If connection successful and non-voice call.

CONNECT<text> TA switches to data mode.

Note: <text> output only if ATX<value> parameter setting with the <value> >0

When TA returns to command mode after call release

OK

Parameter Saving Mode NO_SAVE
Maximum Response Time Timeout set with ATS7 (data call)
Reference  

 

 

♦Parameter Description
<n>

String of dialing digits and optionally V.25ter modifiers dialing digits: 0-9,*, #,+,A,B,C

Following V.25ter modifiers are ignored:

,(comma),T,P,!,W,@

Emergency Call:  
<n> Standardized emergency number 112 (no SIM needed)
<mgsm>

String of GSM modifiers:

I      Actives CLIR (Disables presentation of own number to called party)

i        Deactivates CLIR (Enable presentation of own number to called party)

G    Activates Closed User Group invocation for this call only

g     Deactivates Closed User Group invocation for this call only

 

 

♦Example

ATD10086;

OK

VOICE CALL:BEGIN

 

 

 

NOTE

This command may be aborted generally by receiving an ATH Command or a character during execution.

The aborting is not possible during some states handshaking.

 

 

 

 ATD><mem><n>     Originate call from specified memory

 This command is used to originate a call using specified memory and index number.

(E) ATD<mem><n>[;]

Response

a)If originate a voice call successfully:

OK

VOICE CALL:BEGIN

c) Originate a call unsuccessfully during command execution:

ERROR

d)Originate a call unsuccessfully for failed connection recovery:

NO CARRIER

e)Originate a call unsuccessfully for error related to the MT:

+CME ERROR: <err>

Maximum Response Time  
Reference V.25ter

 

 

♦Parameter Description
<mem>

Phonebook storage: (For detailed description of storages see AT+CPBS)

“DC”          ME dialed calls list

“MC”         ME missed (unanswered received) calls list “RC”     ME received calls list

“SM”          SIM phonebook

“ME”          UE phonebook

“FD”          SIM fixed dialing phonebook “ON”           MSISDN list

“LD”           Last number dialed phonebook

“EN”           Emergency numbers

<n> Integer type memory location in the range of locations available in the selected memory, i.e. the index returned by AT+CPBR.
<;> The termination character “;” is mandatory to set up voice calls. It must not be used for data and fax calls.
<text> CONNECT result code string; the string formats please refer ATX/AT\V/AT&E command.
<err>

Service failure result code string; the string formats please refer +CME

ERROR result code and AT+CMEE command.

 

 

♦Example

ATD>SM3               //Specify the <mem>.

OK

VOICE CALL: BEGIN

 

 

 

 

ATD><n>     Originate call from active memory(1)

This command is used to originate a call to specified number. Telecom does not support this command.

(E)ATD><n>[;]

Response

a)If originate a voice call successfaully:

OK

VOICE CALL:BEGIN

b) If Originate a data call successfully:

CONNECT [<text>]

c) Originate a call unsuccessfully during command execution:

ERROR

d)Originate a call unsuccessfully for failed connection recovery:

NO CARRIER

e)Originate a call unsuccessfully for error related to the MT:

+CME ERROR: <err>

 

Maximum Response Time Timeout set with ATS7 (data call)
Reference V.25ter

 

 

♦Parameter Description
<n> Integer type memory location in the range of locations available in the selected memory, i.e. the index returned by AT+CPBR.
<;>

The termination character “;” is mandatory to set up voice calls. It must

not be used for data and fax calls.

<text>

CONNECT result code string; the string formats please refer

ATX/AT\V/AT&E command.

<err>

Service failure result code string; the string formats please refer +CME

ERROR result code and AT+CMEE command.

 

 

♦Example

ATD>2;

OK

VOICE CALL: BEGIN

  

 

 

ATD><str>     Originate call from active memory(2) 

This command is used to originate a call to specified number. Telecom does not support this command.

(E) ATD><str>[;]

Response

a)If originate a voice call successfully:

OK

VOICE CALL:BEGIN

b) If Originate a data call successfully:

CONNECT [<text>]

c) Originate a call unsuccessfully during command execution:

ERROR

d)Originate a call unsuccessfully for failed connection recovery:

NO CARRIER

e)Originate a call unsuccessfully for error related to the MT:

+CME ERROR: <err>

Maximum Response Time Timeout set with ATS7 (data call)
Reference V.25ter

 

 

♦Parameter Description
<str>

String type value, which should equal to an alphanumeric field in at least one phone book entry in the searched memories. <str> formatted

as current TE character set specified by AT+CSCS.<str> must be double quoted.

<;>

The termination character “;” is mandatory to set up voice calls. It must

not be used for data and fax calls.

<text>

CONNECT result code string; the string formats please refer

ATX/AT\V/AT&E command.

<err>

Service failure result code string; the string formats please refer +CME

ERROR result code and AT+CMEE command.

 

 

♦Example

ATD>”kobe”;

OK

VOICE CALL: BEGIN

 

 

 

 ATA     Call answer 

This command is used to make remote station to go off-hook, e.g. answer an incoming call.

If there is no an incoming call and entering this command to TA, it will be return “NO CARRIER” to TA.

E) ATA

 

Response

a)If originate a voice call successfully:

OK

VOICE CALL:BEGIN

b)For data call, and TA switches to data mode:

CONNECT

c)No connection or no incoming call:

NO CARRIER

Reference V.25ter

 

 

♦Example

ATA

VOICE CALL: BEGIN

OK

 

 

 

ATH     Disconnect existing call 

This command is used to disconnect existing call.

Before using ATH command to hang up a voice call, it must set AT+CVHU=0.

Otherwise, ATH command will be ignored and “OK” response is given only.

This command is also used to disconnect PS data call, and in this case it doesn’t depend on the value of AT+CVHU.

Execution

Response

a) If AT+CVHU=0:

VOICE CALL:END:<time> OK

Reference V.25ter

 

 

♦Parameter Description
<time>

Voice call connection time:

Format: HHMMSS (HH: hour, MM: minute, SS: second)

 

 

♦Example

AT+CVHU=0 OK

ATH

VOICE CALL:END:000017

OK

 

 

 

ATS0     Automatic answer incoming call

The S-parameter command controls the automatic answering feature of the Module. If set to 000, automatic answering is disabled,

otherwise it causes the Module to answer when the incoming call indication (RING) has occurred the number of times indicated

by the specified value; and the setting will not be stored upon power-off, i.e. the default value will be restored after restart.

Read ATS0? Response
    a)If succes:
    <n>
    OK
   

b) If failed

ERROR

Write ATS0=<n> Response a)If succes: OK
   

b)If failed

ERROR

Reference V.25ter  

 

Defined Values 

<n>

000 Automatic answering mode is disable. (default value when power-on)

001–255 Enable automatic answering on the ring number specified.

 

Note

  1. The S-parameter command is effective on voice call and data
  2. If <n> is set too high, the remote party may hang up before the call can be answered

 

Example

ATS0? 000

OK

ATS0=003

OK

 

 

 

+++     Switch from data mode to command mode

This command is only available during a connecting PS data call.

The +++ character sequence causes the TA to cancel the data flow over the AT interface and switch to Command Mode.

This allows to enter AT commands while maintaining the data connection to the remote device.

Execution +++

Response

OK

Reference V.25ter  

 

Note

To prevent the +++ escape sequence from being misinterpreted as data, it must be preceded and followed by a pause of at least 1000 milliseconds,

and the interval between two ‘+’ character can’t exceed 900 milliseconds.

 

 

 

ATO    Switch from command mode to data mode 

ATO is the corresponding command to the +++ escape sequence.

When there is a PS data call connected and the TA is in Command Mode, ATO causes the TA to resume the data

and takes back to Data Mode.

 

Execution ATO

Response

a) TA/DCE switches to Data Mode from Command Mode:

CONNECT [<baud rate>]

   

b) If connection is not successfully resumed:

NO CARRIER

    ERROR
Reference V.25ter  

 

Example

ATO

CONNECT 115200

 

 

 

ATI     Display product identification information

This command is used to request the product information, which consists of manufacturer identification, model identification,

revision identification, International Mobile station Equipment Identity (IMEI) and overall capabilities of the product.

Execution ATI

Response

Manufacturer: <manufacturer>

Model: <model> Revision: <revision> IMEI: [<sn>]

+GCAP: list of <name>s

OK

Reference V.25ter  

 

 

Defined Values 

<manufacturer> The identification of manufacturer.
<model> The identification of model.
<revision> The revision identification of firmware.
<sn>

Serial number identification, which consists of a single line containing

IMEI (International Mobile station Equipment Identity) number.

<name>

List of additional capabilities:

+CGSM         GSM function is supported

+FCLASS      FAX function is supported

+DS              Data compression is supported

+ES                Synchronous data mode is supported.

+CIS707-A   CDMA data service command set

+CIS-856       EVDO data service command set

+MS              Mobile Specific command set

 

Example

ATI

Manufacturer: SIMCOM INCORPORATED

Model: SIMCOM_SIM7600C

Revision: SIM7600C _V1.0 IMEI: 351602000330570

+GCAP: +CGSM,+FCLASS,+DS

OK

 

 

 

AT+IPR     Set local baud rate temporarily 

This command sets the baud rate of module’s serial interface temporarily, after reboot the baud rate is set to value of IPREX.

Test

 

AT+IPR=?

Response

+IPR: (list of supported<speed>s) OK

Read

 

AT+IPR?

Response

+IPR: <speed> OK

Write

 

AT+IPR=<speed>

Response

OK

or

ERROR

Execution AT+IPR=<speed>

Set the value to boot value:

OK

 

Defined Values

<speed>

Baud rate per second:

0, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200,

230400, 460800,921600, 3000000,3200000,3686400

 

 

 

AT+ICF     Set control character framing 

This command sets character framing which contains data bit, stop bit and parity bit.

Test AT+ICF=?

Response

+ICF: (list of supported<format>s), (list of supported<parity>s) OK

Read AT+ICF?

Response

+ICF: <format>,<parity> OK

Write AT+ICF=<format>[,<parity>]

Response

OK

or

ERROR

Execution AT+ICF

Set default value:

OK

Reference V.25ter  

 

Defined Values 

<format> 1 – data bit 8, stop bit 2
  2- data bit 8, parity bit 1,stop bit 1
  3- data bit 8, stop bit 1
  4- data bit 7, stop bit 2
  5- data bit 7, parity bit 1, stop bit 1
  6- data bit 7, stop bit 1
<parity> 0 – Odd
  1- Even
  2- Space
  4- none

 

Example

AT+ICF?

+ICF: 3,3

OK

AT+ICF=?

+ICF: (1-6),(0-3)

OK

AT+ICF=3,3

OK

 

 

 

AT+IFC     Set local data flow control 

The command sets the flow control mode of the module.

Test AT+IFC=? Response
    +IFC: (list of supported<DCE>s), (list of supported<DTE>s)
    OK
    or
    ERROR
Read AT+IFC? Response
    +IFC: <DCE>,<DTE>
    OK
    or
    ERROR
Write AT+IFC=<DCE>[,<DTE>] Response
    OK
    or
    ERROR
Execution AT+IFC Set default value:
    OK
Reference V.25ter  

 

Defined Values 

<DCE>

0- none (default)

2=- RTS hardware flow control

<DTE> 0- none (default)
  2- CTS hardware flow control

 

Example

AT+IFC?

+ICF: 0,0

OK

AT+IFC=?

+ICF: (0,2),(0,2)

OK

AT+ICF=2,2

 

 

 

AT&C   Set DCD function mode 

This command determines how the state of DCD PIN relates to the detection of received line signal from the distant end.

Execution AT&C[<value>]

Response

OK

or

ERROR

Reference  V.25ter  

 

Defined Values 

<value>

0       DCD line shall always be on.

1       DCD line shall be on only when data carrier  signal is present.

2           Setting winks(briefly transitions off, then back on)the DCD line when data calls end.

 

Example

AT&C1

OK

 

 

 

ATE     Enable command echo 

This command sets whether or not the TA echoes characters.

Execution ATE[<value>]

Response

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0     –    Echo mode off

1     –    Echo mode on

 

Example

ATE1

OK

 

 

 

AT&V    Display current configuration 

This command returns some of the base configuration parameters settings.

Execution AT&V

Response

<text> OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<text> All relative configuration information.

 

Example

AT&V

&C: 0; &D: 2; &F: 0; E: 1; L: 0; M: 0; Q:

0; V: 1; X: 0; Z: 0; S0: 0;

S3: 13; S4: 10; S5: 8; S6: 2; S7: 50; S8:

2; S9: 6; S10: 14; S11: 95;

+FCLASS:   0;   +ICF:   3,3;   +IFC:  2,2;

+IPR: 115200; +DR: 0; +DS: 0,0,2048,6;

+WS46: 12; +CBST: 0,0,1;

……

OK

 

 

 

 AT&D   Set DTR function mode 

This command determines how the TA responds when DTR PIN is changed from the ON to the OFF condition during data mode.

Execution AT&V[<value>]

Response

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0       TA ignores status on DTR.

1       ON->OFF on DTR: Change to Command mode with remainin     g the connected call

2              ON->OFF on DTR: Disconnect call, change to Command

Mode. During state DTR = OFF is auto-answer off.

 

Example

AT&D1

OK

 

 

 

AT&S     Set DSR function mode

The command determines how the state of DSR pin works.

Execution AT&S[<value>]

Response

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0       DSR line shall always be on.

1       DSR line shall be on only when DTE and DCE are connected.

 

Example

AT&S0

OK

 

 

 

ATV     Set result code format mode 

This parameter setting determines the contents of the header and trailer transmitted with result codes and information responses.

Write ATV[<value>]

Response

If <value> =0

0

If <value> =1

OK

Reference V.25ter  

 

Defined Values 

<value>

0       Information response: <text><CR><LF> Short result code format: <numeric code><CR>

1       Information response: <CR><LF><text><CR><LF>

Long result code format: <CR><LF><verbose code><CR><LF>

 

Example

ATV1

OK

 

 

 

AT&F      Set all current parameters to manufacturer defaults

This command is used to set all current parameters to the manufacturer defined profile.

Write AT&F[<value>]

Response

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0 — Set some temporary TA parameters to manufacturer defaults.

The setting after power on or reset is same as value 0.

 

Example

AT&F

OK

 

 

 

ATQ     Set Result Code Presentation Mode

Specify whether the TA transmits any result code to the TE or not.

Text information transmitted in response is not affected by this setting.

Write ATQ<n>

Response

If <n>=0:

   

OK

 

If <n>=1:

No Responses

  ATQ

Set default value: 0

OK

No Responses

Reference V.25ter  

 

Defined Values 

<n>

0       –    DCE transmits result code

1       –    DCE not transmits result code

 

Example

ATQ0

OK

 

 

 

ATQ       Set CONNECT Result Code Format 

This parameter setting determines whether the TA transmits unsolicited result codes or not.

The unsolicited result codes are <CONNECT><SPEED><COMMUNICATION PROTOCOL>[<TEXT>]

Write ATX<n>

Response

OK

or

ERROR

Execution ATX

Set default value: 1

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value> 0    –    CONNECT result code returned
  1,2,3,4    –    May be transmits extern result codes according to AT&E and AT\V settings. Refer to AT&E.

 

 Example

ATX1

OK

 

 

 

AT\V      Set CONNECT Result Code Format About Protocol 

This parameter setting determines whether report the communication protocol.

If PS call, it also determines whether report APN, uplink rate, downlink rate.

Write AT\V<value>

Response

OK

or

ERROR

Execution AT\V

Set default value: 0

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0  – Don’t report

1  – Report communication protocol. And report APN, uplink rate, downlink rate if PS call. Refer to AT&E.

The maybe communication protocol report include “NONE”,”PPPoverUD”,”AV32K”,”AV64K”,”PACKET”.

And APN in string format while uplink rate and downlink rate in integer format with kb unit.

 

Example

AT\V0

OK

 

 

 

AT&E           Set CONNECT Result Code Format About Speed 

This parameter setting determines to report Serial connection rate or Wireless connection speed. It is valid only ATX above 0.

 

Write AT&E<value>

Response

OK

or

ERROR

Execution AT&E

Set default value: 1

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value>

0       –    Wireless connection speed in integer format.

1       –    Serial connection rate in integer format. Such as: “115200”

 

Example

AT&E0

OK

 

 

 

AT&W  Save the user setting to ME 

This command will save the user settings to ME which set by ATE, ATQ, ATV, ATX, AT&C AT&D, AT&S, AT\V, AT+IFC and ATS0.

 

Write AT&W<value> Response
    OK
    or
    ERROR
Execution AT&W Set default value: 0
    OK
    or
    ERROR

 

Defined Values

<value> 0    –    Save

 

Example

AT&W0

OK

 

 

 

ATZ       Restore the user setting from ME 

This command will restore the user setting from ME which set by ATE, ATQ, ATV, ATX, AT&C AT&D, AT&S, AT\Q, AT\V, and ATS0.

Write ATZ<value>

Response

OK

or

ERROR

Execution ATZ

Set default value: 0

OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<value> 0    –    Restore

 

Example

ATZ0

OK

 

 

 

AT+CGMI       Request manufacturer identification

This command is used to request the manufacturer identification text,

which is intended to permit the user of the Module to identify the manufacturer.

 

Test AT+CGMI=?

Response

OK

Execution AT+CGMI

Response

<manufacturer> OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<manufacturer> The identification of manufacturer.

 

Example

AT+CGMI

SIMCOM INCORPORATED

OK

 

 

 

AT+CGMM      Request model identification 

This command is used to request model identification text,

which is intended to permit the user of the Module to identify the specific model.

Test Command AT+CGMM=?

Response

OK

Execution AT+CGMM

Response

<model> OK

or

ERROR

Reference V.25ter  

 

Defined Values 

<model> The identification of model.

 

Example

AT+CGMM

SIMCOM_SIM7600C

OK

 

 

 

AT+CGMR     Request revision identification 

This command is used to request product firmware revision identification text,

which is intended to permit the user of the Module to identify the version.

Test AT+CGMR=?

Response

OK

Execution AT+CGMR

Response

+CGMR: <revision> OK

or

ERROR

Reference V.25ter  

 

Defined Values

<revision> The revision identification of firmware.

 

Example

AT+CGMR

+CGMR: LE11B01SIM7600C

OK

 

 

 

AT+CGSN          Request product serial number identification 

This command requests product serial number identification text,

which is intended to permit the user of the Module to identify the individual ME to which it is connected to.

Test AT+CGSN=?

Response

OK

Execution AT+CGSN

Response

<sn> OK

or

+CME ERROR: memory failure

Reference V.25ter  

 

Defined Values 

<sn>

Serial number identification,

which consists of a single line containing the IMEI (International Mobile station Equipment Identity) number of the MT.

If in CDMA/EVDO mode ,it will show ESN(Electronic Serial Number)

 

Example

AT+CGSN

351602000330570

OK

 

 

 

AT+CSCS          Select TE character set 

Write command informs TA which character set <chest> is used by the TE.

TA is then able to convert character strings correctly between TE and MT character sets.

Read command shows current setting and test command displays conversion schemes implemented in the TA.

Test AT+CSCS=?

Response

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

Read AT+CSCS?

Response

+CSCS: <chset> OK

Write AT+CSCS=<chset>

Response

OK

ERROR

 

Defined Values

<chsset>

Character set, the definition as following: “IRA”       International reference alphabet.

“GSM”     GSM default alphabet; this setting causes easily software flow control (XON /XOFF) problems.

“UCS2”    16-bit universal multiple-octet coded character set;

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

 

Example

AT+CSCS=”IRA”

OK

 

 

 

AT+CIMI        Request international mobile subscriber identity

Execution command causes the TA to return <IMSI>,

which is intended to permit the TE to identify the individual SIM card which is attached to MT.

 

NOTE:

If USIM card contains two apps, like China Telecom 4G card, one RUIM/CSIM app, and another USIM app; so there are two IMSI in it;

AT+CIMI will return the RUIM/CSIM IMSI; AT+CIMIM will return the USIM IMSI.

Test AT+CIMI=?

Response

OK

Execution AT+CIMI

Response

<IMSI> OK

or

+CME ERROR: memory failure

Reference V.25ter  

 

Defined Values 

<IMSI> International Mobile Subscriber Identity (String, without double quote)

 

 Example

AT+CIMI

460010222028133

OK

 

 

 

AT+CIMIM           Request another international mobile subscriber identity 

Execution command causes the TA to return <IMSI>,

which is intended to permit the TE to identify the individual SIM card which is attached to MT.

 

NOTE:

If USIM card contains two apps, like China Telecom 4G card, one RUIM/CSIM app, and another USIM app; so there are two IMSI in it;

AT+CIMIM will return the USIM IMSI; AT+CIMI will return the RUIM/CSIM IMSI.

Test AT+CIMIM=?

Response

OK

Execution AT+CIMIM

Response

<IMSI> OK

or

+CME ERROR: memory failure

Reference V.25ter  

 

Defined Values 

<IMSI> International Mobile Subscriber Identity (String, without double quote)

 

Example

AT+CIMIM

460010222028133

OK

 

 

 

AT+GCAP         Request overall capabilities

Execution command causes the TA reports a list of additional capabilities.

Test AT+GCAP=?

Response

OK

Execution AT+GCAP

Response

+GCAP: (list of <name>s) OK

Reference V.25ter  

 

Defined Values 

<name>

List of additional capabilities.

+CGSM         GSM function is supported

+FCLASS      FAX function is supported

+DS              Data compression is supported

+ES                Synchronous data mode is supported.

+CIS707-A     CDMA data service command set

+CIS-856       EVDO data service command set

+MS              Mobile Specific command set

 

Example

AT+GCAP

+GCAP:+CGSM,+FCLASS,+DS

OK

 

 

 

 

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