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AT Commands According to V.25TER 

 

 

 

No Command Description
F0201 A/ Re-issues the last command given
F0202 ATD Mobile originated call to dial a number
F0203 ATD><mem><n> Originate call from specified memory
F0204 ATD><n> Originate call from active memory
F0205 ATD><n> Originate call from active memory
F0206 ATA Call answer
F0207 ATH Disconnect existing call
F0208 ATS0 Automatic answer incoming call
F0209 +++ Switch from data mode to command mode
F0210 ATO Switch from command mode to data mode
F0211 ATI Display product identification information
F0212 AT+IPR Set local baud rate temporarily
F0213 AT+ICF Set control character framing
F0214 AT+IFC Set local data flow control
F0215 AT&C Set DCD function mode
F0216 ATE Enable command echo
F0217 AT&V Display current configuration
F0218 AT&D Set DTR function mode
F0219 ATV Set result code format mode
F0220 AT&F Set all current parameters to manufacturer defaults
F0221 ATQ Set Result Code Presentation Mode
F0222 ATX Set CONNECT Result Code Format
F0223 AT\V Set CONNECT Result Code Format About Protocol
F0224 AT&E Set CONNECT Result Code Format About Speed
F0225 AT&W Save the user setting to ME
F0226 ATZ Restore the user setting from ME
F0227 AT+CGMI Request manufacturer identification
F0228 AT+CGMM Request model identification
F0229 AT+CGMR Request revision identification
F0230 AT+CGSN Request product serial number identification
F0231 AT+CSCS Select TE character set
F0232 AT+CIMI Request international mobile subscriber identity
F0233 AT+GCAP Request overall capabilities

 

 

 

 

F0201   A/     Re-issues the Last Command Given

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

 

Example

A/

+GCAP:+CGSM,+FCLASS,+DS

OK

 

 

 

F0202   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>]

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)

 

<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 of connection establishment such as handshaking

 

 

 

 F0203   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>[;]

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>

Reference V.25ter

 

<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

 

 

 

F0204   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>[;]

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

 

<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

  

 

 

F0205   ATD><str>    Originate call from active memory(2) 

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

E) ATD><str>[;]

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) an 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

 

<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

 

 

 

F0206   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

 

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

 

 

 

F0207   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.

E) ATH

a) If AT+CVHU=0:

VOICE CALL:END:<time>

OK

Reference V.25ter

 

<time>

Voice call connection time:

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

 

Example

AT+CVHU=0

OK

ATH

VOICE CALL:END:000017

OK

 

 

 

F0208   ATS0     Automatic answer an 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 the restart.

 

R) ATS0?

a) If success:

<n>

OK

b) If failed

ERROR

W) ATS0=<n>

a) If success:

OK

b) If failed

ERROR

 

<n>

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

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

 

NOTE

The S-parameter command is effective on voice calls and data

If <n> is set too high, the remote party may hang up before the call can be answered automatically. 

 

Example

ATS0?

000

OK

ATS0=003

OK

 

 

 

F0209   +++     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.

E) +++ OK

 

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.

 

 

 

F0210   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.

 

E) ATO

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

CONNECT [<baud rate>]

 

b) If connection is not successfully resumed:

NO CARRIER

ERROR

 

Example

ATO

CONNECT 115200

 

 

 

F0211   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.

 

E) ATI

Manufacturer: <manufacturer>

Model: <model>

Revision: <revision>

IMEI: [<sn>]

+GCAP: list of <name>s

OK

 

<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

 

 

 

F0212   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.

 

T) AT+IPR=?

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

OK

R) AT+IPR?

+IPR: <speed>

OK

W) AT+IPR=<speed>

OK

or

ERROR

E) AT+IPR=<speed>

Set the value to boot value:

OK

 

<speed>

Baud rate per second:

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

230400, 460800,921600, 3000000,3200000,3686400

 

 

 

F0213   AT+ICF     Set control character framing 

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

 

T) AT+ICF=?

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

OK

R) AT+ICF?

+ICF: <format>,<parity>

OK

W) AT+ICF=<format>[,<parity>]

OK

or

ERROR

E) AT+ICF

Set default value:

OK

 

<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

3     none

 

Example

AT+ICF?

+ICF: 3,3

OK

 

AT+ICF=?

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

OK

 

AT+ICF=3,3

OK

 

 

 

F0214   AT+IFC     Set local data flow control 

The command sets the flow control mode of the module.

 

T) AT+IFC=?

+IFC: (list of supported<DCE>s), (list of supported<DTE>s)

OK

or

ERROR

R) AT+IFC?

+IFC: <DCE>,<DTE>

OK

or

ERROR

W) AT+IFC=<DCE>[,<DTE>]

OK

or

ERROR

E) AT+IFC

Set default value:

OK

 

<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

OK

 

 

 

F0215   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.

 

E) AT&C[<value>]

OK

or

ERROR

 

<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

 

 

 

F0216   ATE     Enable command echo 

This command sets whether or not the TA echoes characters.

 

E) ATE[<value>]

OK

or

ERROR

 

<value>

0     Echo mode off

1     Echo mode on

 

Example

ATE1

OK

 

 

 

F0217   AT&V    Display current configuration 

This command returns some of the base configuration parameters settings.

 

E) AT&V

<text>

OK

or

ERROR

 

<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

 

 

 

 F0218 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.

 

E) AT&V[<value>]

OK

or

ERROR

 

<value>

0     TA ignores status on DTR.

1     ON->OFF on DTR: Change to Command mode with remaining 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

 

 

 

F0219   AT&S     Set DSR function mode

The command determines how the state of DSR pin works.

 

E) AT&S[<value>]

OK

or

ERROR

 

<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

 

  

 

F0219   ATV     Set result code format mode 

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

 

W) ATV[<value>]

If <value> =0

0

If <value> =1

OK

 

<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

 

 

 

F0220   AT&F      Set all current parameters to manufacturer defaults

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

 

W) AT&F[<value>]

OK

or

ERROR

 

<value>

0     Set some temporary TA parameters to manufacturer defaults.

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

 

Default Values

TA Parameter                 Values

AT+CNMP[1]                      55

AT+CTZU[2]                       0

AT+CGPSSSL[2]                0

AT+CGPSURL[2]               “”

[1] takes effect immediately

[2] takes effect after a modem reboot

 

Example

AT&F

OK

 

 

  

F0221   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.

 

W) ATQ<n>

If <n>=0:

OK

 

If <n>=1:

No Responses

ATQ

Set default value: 0

OK

 

<n>

0     DCE transmits result code

1     DCE not transmits result code

 

Example

ATQ0

OK

 

 

 

F0222   ATX       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>]

 

W) ATX<n>

OK

or

ERROR

E) ATX

Set default value: 1

OK

or

ERROR

 

<n>

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

 

  

 

F0223   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.

 

W) AT\V<value>

OK

or

ERROR

E) AT\V

Set default value: 0

OK

or

ERROR

 

<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

 

 

 

F0024   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.

 

W) AT&E<value>

OK

or

ERROR

E) AT&E

Set default value: 1

OK

or

ERROR

 

<value>

0     Wireless connection speed in integer format.

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

 

Example

AT&E0

OK

 

 

  

F0225   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.

 

W) AT&W<value>

OK

or

ERROR

E) AT&W

Set default value: 0

OK

or

ERROR

 

<value> 0     Save

 

Example

AT&W0

OK

 

 

 

F0226 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.

 

W) ATZ<value>

OK

or

ERROR

E) ATZ

Set default value: 0

OK

or

ERROR

 

<value> 0     Restore

 

Example

ATZ0

OK

 

 

 

F0227 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.

 

T) AT+CGMI=? OK
E) AT+CGMI

<manufacturer>

OK

or

ERROR

 

<manufacturer> The identification of manufacturer.

 

Example

AT+CGMI

SIMCOM INCORPORATED

OK

 

 

 

F0228   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.

 

T) AT+CGMM=? OK
E) AT+CGMM

<model>

OK

or

ERROR

 

<model> The identification of model.

 

Example

AT+CGMM

SIMCOM_SIM8200G

OK

 

  

 

F0229   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.

 

T) AT+CGMR=? OK
E) AT+CGMR

+CGMR: <revision>

OK

or

ERROR

 

<revision> The revision identification of firmware.

 

Example

AT+CGMR

+CGMR: LE11B03SIM8200G

OK

 

 

 

F0230   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.

 

T) AT+CGSN=? OK
E) AT+CGSN

<sn>

OK

or

+CME ERROR: memory failure

 

<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

 

 

 

F0231   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.

 

T) AT+CSCS=?

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

OK

R) AT+CSCS?

+CSCS: <chset>

OK

W) AT+CSCS=<chset>

OK

ERROR

 

<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

 

 

 

 

F0232   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.

 

T) AT+CIMI=? OK
E) AT+CIMI

<IMSI>

OK

or

+CME ERROR: memory failure

 

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

 

Example

AT+CIMI

460010222028133

OK

 

  

 

F0232   AT+CIMI     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.

 

T) AT+CIMI=? OK
E) AT+CIMI

<IMSI>

OK

or

+CME ERROR: memory failure

 

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

 

Example

AT+CIMI

460010222028133

OK

 

 

 

F0233   AT+GCAP     Request overall capabilities

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

 

T) AT+GCAP=? OK
E) AT+GCAP

+GCAP: (list of <name>s)

OK

 

<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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