at command reference guide.pdf

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Chapter 3

AT Command Interface

GSMDM-100DB GSM Data Module Reference Guide PRELIMINARY DRAFT 11/15/2001 55

Command Descriptions

The following sections provide detailed descriptions about the

commands that the GSM Data Module supports.

AT Commands

+++ AT Escape Command

Description: When the GSM Data Module has established a

connection with a remote modem, you can use the

+++command to switch the GSM Data Module

from Data Mode to Command Mode while

maintaining the connection with the remote

modem. Issuing this command stops the flow of

data on the AT command interface. Do not

precede this command with the ATprefix, nor

end it with a termination character. To return to

Data Mode and resume data flow, use the On

command (see page 65).

Syntax +++

Parameters: None

Example: +++

Possible

Response:

OK

Notes: When issuing the +++command, there must be a

0.5-second pause before and after issuing the

command.

A/ Repeat Last Command Line Executed

Description: The A/command instructs the GSM Data Module

to re-execute the last command line executed. Do

not precede this command with the ATprefix, nor


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end it with a termination character. The command

executes as soon as the /character us typed. This

command is useful when you want the GSM Data

Module to re-execute a lengthy command line.

Syntax: A/

Parameters: None

Example: A/

Possible

Response:

OK

Notes: The last-executed command line stays in the

GSM Data Modules until it is turned off or reset

with the Zcommand. Either action invalidates the

A/command, since there is no command in

memory to re-execute.

A Answer Incoming Call

Description: The Acommand instructs the GSM Data Module

to answer an incoming call.

Syntax: ATA

Parameters None

Example: ATA

Possible

Responses:

CONNECT if the call is accepted.

appears if the X1, X2, X3, X4command is in

effect.

OKwhen the GSM Data Module returns to

Command Mode.

NO CARRIERif there is no connection.

Notes: This command must be the only command or the

final command on the command line. This

command aborts if a character is received during

execution. However, in some connection states


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A Answer Incoming Call

(such as during handshaking), the command

cannot be aborted.

Bn Bell/CCITT Compatibility

Description: The Bncommand lets you choose between the

Bell and CCITT protocols when the GSM Data

Module is operating at 300 or 1200 bps.

Syntax: ATB

Parameters: = 0 or 1

B0= use the CCITT V.22 protocol at 1200 bps.

B1= use the Bell 103J protocol at 300 bps and

the Bell 212A protocol at 1200 bps.(DEFAULT)

Examples: ATB0ATB1

Possible

Responses:

OKif the command is accepted.

ERRORif the command is rejected because the

GSM Data Module is not operating at 300 or

1200 bps.

Cn Carrier Option

Description: The Cncommand is provided for compatibility

purposes only; no action is taken.

Syntax: ATC


C0= not supported.

C1= guarantees backward compatibility with

communications software that issue the C1command.(DEFAULT)

Examples: ATC0ATC1


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Possible

Response:

OKacknowledges the change of state.

D Dial Command

Description: The Dcommand lets you originate a voice, data, or

fax call to a dialed number, or dial a number stored

in memory. The Dcommand also controls

supplementary services.

Originating a Call

Syntax: ATD[;]

Parameters: string of dialing digits and optionally

V.25ter and GSM modifier characters:

Dialing digits:0through 9

*, # only for supplementary service calls

+ only as first character of call

A, B, C ignored

; voice call, return to Command Mode

> direct dial from phonebook

v.25ter parameters:

T Tone (DTMF) dialing

P Pulse (rotary) dialing

comma, ! ignored

W, @ ignored

GSM parameters:

I, #31# CLIR invocation

i, *31# CLIR suppression

G,g CUG info, uses set with +CCUG

Examples: ATD9495551212ATD1

Possible

Responses:

OKif voice call connects successfully.

OKwhen the GSM Data Module releases the call

and returns to Command Mode.

NO DIALTONE if no dial tone is detected with the

X2or X4command in effect.


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D Dial Command

BUSY if a busy tone is detected with the X3or X4

command in effect.

NO CARRIER if a connection cannot be set up.

+CME ERROR: if error is related to Data

Module functionality.

Notes: Up to 20 dialing digits and GSM modifiers can

follow the ATDcommand.

Dialing a Stored Number from Memory

Syntax: ATD> [][][;]

Parameters:

phone book

FD= SIM fixed-dialing memory feature.LD = SIM last-dialing-phonebook

SM= SIM phonebook

ME= ME phonebook

integer-type memory location, should be in the

range of locations available in the memory used.

= CLIR invocation (restrict CLI presentation).

= CLIR suppression (allow CLI presentation).

and = Control CUG. Used with the

+CCUGcommand to control the CUG

supplementary service.

= voice call, return to Command Mode

Examples: ATD>34;

Places a voice call to the number from PB entry 34.

ATD>"DDC";

Places a voice call to the name in PB matching thestring.

ATD>SM34:

Places a voice call to entry 34 in the PB storage SM


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D Dial Command

If semicolon (;) is omitted, places a data call.

Possible

Responses:


OKwhen Data Module releases the call and returns

to Command Mode.NO DIALTONE if no dial tone is detected with the



command in effect.




Dialing a Supplemental Service String

When is a supplementary service string, the

Data Module tries to call the supplementary service

entered in the dialed string. The Data Module

returns result of the supplementary service AT

command issued. For a list of the supplementary

service strings supported, refer to Appendix B.

Notes: The Dcommand for dialed or supplementary service

calls can usually be aborted by receiving a character

during execution. This command cannot be aborted

in some connection setup states, such as

handshaking.

En Enable Command Echo

Description: The Encommand determines whether the GSM

Data Module echoes command characters

received during Command Mode.

Syntax: ATE


E0= do not echo command characters.

E1= echo command characters.

Examples: ATE1

ATE0


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En Enable Command Echo

Possible

Response:


Fn Line Modulation

Description: The Fncommand selects the line modulation. The

line modulation is fixed, unless automode (F0) is

selected.

Syntax: ATF

Parameters: = 0, 1, 3, 4, 5, 6, 7, 8,9, or 10

F0= enable auto-detect mode. All connect speeds

are possible, based on the remote modem'spreference.(DEFAULT)

F1= select V.21 or Bell 103 modulation, based

on the Bncommand in effect, as the only

acceptable line speed that can result in a

data connection.

F3= select V.23 modulation as the only

acceptable line speed that can result in a

data connection. Originating modem

operates at 75 bps and answering modem

operates at 1200 bps.

F4= select V.22 1200 or Bell 211A modulation,

based on the Bncommand in effect, as the

only acceptable line speed that can result in

a data connection.

F5= select V.22bis as the only acceptable line

modulation that can result in a data

connection.

F6= select V.32bis 4800 or V.32 4800 as the

only acceptable line modulation that can

result in a data connection.

F7= select V.32bis 7200 as the only acceptable

line modulation that can result in a data

connection.

F8= select V.32bis 9600 or V.32 9600 as the

only acceptable line modulation that can

result in a data connection.


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Fn Line Modulation

F9= select V.32bis 12,000 as the only acceptable

line modulation that can result in a data

connection.

F10= select V.32bis 14,400 as the only

acceptable line modulation that can result ina data connection.

Examples: ATF0ATF8

Possible

Response:


Hn Hook Switch - Disconnect Existing Connection

Description: The Hncommand terminates the current call.

Syntax: ATH

Parameters: = 0

H0= terminate the call and disconnect from line.

Example: ATH0

Possible

Response:


Notes: OK is issued after circuit 109 (DCD) turns OFF

(if it was ON).

In Display Product Identification Information

Description: The Incommand retrieves the product

information text.

Syntax: ATI

Parameters: = 0, 1, or 3

I0= return manufacturer followed by model


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Mn Speaker ON/OFF

Description: The Mncommand controls the status of the GSM

Data Module speaker.

Syntax: ATM

Parameters: = 0, 1, 2, or 3

M0= speaker turned off.

M1= speaker off when remote carrier received.

(DEFAULT)

M2= speaker always turned on.

M3= speaker off when remote carrier is received

and when the GSM Data Module is dialing.

Examples: ATM0

ATM3

Possible

Response:


Nn Automode Enable/Disable

Description: The Nncommand can be used to ensure that a

data connection is made only at a specified speed.

Syntax: ATN


N0= disable automode detection. When

originating or answering, handshake only at

the DTE-to-modem data rate.

N1= enable automode detection. Handshake with

remote modem at the highest speed

supported by both modems.(DEFAULT)

Examples: ATN0

ATN1

Possible OK acknowledges the change of state.


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Nn Automode Enable/Disable

Response:

On Return to Data Mode

Description: The Oncommand returns the GSM Data Module

to Data Mode from Command Mode.

Syntax: ATO

Parameters: = 0

O0= switch from Command Mode to Data Mode

Example: ATO0

Possible

Responses:

NO CARRIER if connection is not successfully

resumed.

CONNECT if the module successfully

returns to Data Mode from Command Mode.

Notes: is returnedonly if parameter setting is

greater than 0.

P Pulse Dial

Description: The Pmodifier instructs the GSM Data Module

to use the pulse (rotary) dialing method to dial

calls that follow the Pmodifier in the Dial

command line.

Syntax: ATDP

Example: ATDP9495551212

Possible

Responses:


OKwhen Data Module releases the call and returns

to Command Mode.





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P Pulse Dial

command in effect.




Notes: The Pmodifier can be used along with the T

modifier if both pulse and tone dialing are

required in the same Dial command line. For

example: ATDP5551212,,T2468

Qn Suppress Result Codes

Description: The Qncommand determines whether the GSM

Data Module transmits result codes.

Syntax: ATQ


Q0= transmit result codes.

Q1= do not transmit result codes.

Examples: ATQ0ATQ1

Possible

Responses:

If =0: OK

If =1: no response

S0 Set Number of Rings

Description: The S0command determines the number of rings

that must occur before the GSM Data Module

automatically answers an incoming call.

Syntax: ATS0=

Parameters: = 1 to 255 rings.

Example: ATS0=1


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S0 Set Number of Rings

Possible

Response:

OK

S3 Carriage Return Character

Description: The S3command sets the ASCII value of the

carriage return character used to end the

command line and the character that appears after

a modem response. The default value is 13,

although you can change it to another ASCII

value between 0 and 127.

Syntax: ATS3=

Parameters: = 0 to 127 ASCII. (DEFAULT = 13 [CTRL-M])

Example: ATS3=4

Possible

Response:

OK

S4 Line Feed Character

Description: The S4command sets the ASCII value of theline feed character. The default value is 10,

although you can change it to another ASCII

value between 0 and 127.

The GSM Data Module sends the line feed

character after sending a carriage return character

when the V1command is in effect, enabling

English result codes. However, it is not sent with

most numeric result codes. If you do not want to

receive a line feed character, you can change

the value in this register to a null character, butyou cannot disable line feed characters.

Syntax: ATS4=


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S4 Line Feed Character

Parameters: = 0 to 127 ASCII (DEFAULT = 10 [CTRL-

J])

Example: ATS4=6

Possible

Response:

OK

S5 Backspace Character

Description: The S5command sets the ASCII value of the

backspace character. This character is the

character created by pressing the Backspace key

and the character echoed to move the cursor to the

left. The default value is 8. If you want to changethis value, do not enter a value between 33 and

126 because these values are equivalent to

a printable ASCII character and your modem will

not recognize the character as a backspace

character.

Syntax: ATS5=

Parameters: = 0 to 32 ASCII

Example: ATS5=28

Possible

Response:

OK

S7 Set Number of Seconds to Wait for Connection

to Complete

Description: The S7command determines the amount of time

that the GSM Data Module waits for a call to

complete after originating or answering the callbefore the Module disconnects.

Syntax: ATS7=


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S7 Set Number of Seconds to Wait for Connection

to Complete

Parameters: = 0 to 60, 255 seconds.

Example: ATS7=15

Possible

Response:

OK

S8 Set Number of Seconds to Wait for Comma

Modifier

Description: The S8command determines how long the GSM

Data Module waits when it encounters a comma

in a Dial command before processing the rest of

the command line.

Syntax: ATS8=

Parameters: = 1-255 seconds. (DEFAULT is 2 seconds)

Example: ATS7=15

Possible

Response:

OK

S10 Set Disconnect Delay After Indicating the

Absence of Data Carrier

Description: The S10command determines the amount of time

that the GSM Data Module remains connected in

the absence of a data carrier. If the data carrier is

detected before disconnect, the Data Module

remains connected.

Syntax: ATS10=

Parameters: = 1-15-255 tenths of a second.

Example: ATS10=8


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S10 Set Disconnect Delay After Indicating the

Absence of Data Carrier

Possible

Response:

OK

T Tone Dial

Description: The Tmodifier instructs the GSM Data Module

to use the tone (DTMF) dialing method to dial

calls that follow the Tmodifier in the Dial

command line.

Syntax: ATDT

Example: ATDT9495551212

PossibleResponses:

OKif voice call connects successfully.OKwhen Data Module releases the call and returns

to Command Mode.




command in effect.




Notes: The Tmodifier can be used along with the P

modifier if both tone and pulse dialing are

required in the same Dial command line. For

example: ATDP5551212,,T2468

Vn Result Code Format

Description: Set result code format mode. This parameter

setting determines the contents of the header and

trailer transmitted with result codes and

information responses.

Syntax: ATV



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Vn Result Code Format

V0= use numeric result codes followed by

.

V1= use word result codes preceded and

followed by.

Examples: ATV0

ATV1

Possible

Response:

OK

Wn Correction Message Control

Description: The Wncommand controls the format of

CONNECT messages.

Syntax: ATW


W0= upon connection, the GSM Data Module

reports only the DTE speed (for example,

CONNECT 9600). Subsequent responses

are disabled.(DEFAULT)


reports the line speed, the error correction

protocol, and the DTE speed, respectively.

Subsequent responses are disabled.


reports the DCE speed (for example,

CONNECT 2400). Subsequent responses

are disabled.

Examples: ATW0

ATW1

PossibleResponse:

OK

Xn Extended Result Code


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Xn Extended Result Code

Description: The Xncommand sets the CONNECT result code

format and call monitoring. This parameter

setting determines whether or not the GSM Data

Module detects the presence of dial tone and busy

signal, and whether the module transmitsparticular result codes.

Syntax: ATX

Parameters: = 0, 1, 2, 3, 4, or 5

X0= CONNECTresult code only returned, dial

tone and busy detection are both disabled.

X1= CONNECT result code only

returned, dial tone and busy detection are

both disabled.

X2= CONNECT result code returned,

dial tone detection is enabled, busy

detection is disabled.


dial tone detection is disabled, busy

detection is enabled.


dial tone and busy detection are both

enabled.

Examples: ATX0ATX4

Possible

Response:

OK

Yn Long Space Disconnect

Description: The Yncommand is provided for compatibility

purposes only; no action is taken.

Syntax: ATY


Y0= disable long-space disconnect.

Y1= enable long-space disconnect.


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Yn Long Space Disconnect

Examples: ATY0ATY1

PossibleResponse:

OK

Zn Soft Reset

Description: The Zncommand resets the GSM Data Module

and sets all current parameters to the user-defined

profile.

Syntax: ATZ


0= reset to profile number 0.

1= reset to profile number 1.

Example: ATZ0

Possible

Response:

OK

Notes: The user-defined profile is stored in non-volatile

memory. If the user-profile is invalid, the GSMData Module uses the factory-default profile.

The GSM Data Module ignores any additional

commands that follow this command on the

command line. A delay of 300ms is required

before the next command can be sent, otherwise

the OKresponse may be corrupted.

\Kn Break Control

Description: The \Kncommand determines the number of bitsbetween the data characters.

Syntax: AT\K


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\Kn Break Control

Parameters: = 0-7

Example: AT\K=1

PossibleResponse:

OK

\Nn Error Correction

Description: The \Nncommand controls the preferred error-

correcting mode in a data connection.

Syntax: AT\N

Parameters: = 0, 2, 4, or 5\N0= disable error-correction mode.

\N2= auto-reliable mode (LAPM connection,

then MNP connection).

\N4= select LAPM error-correction mode.

\N5= select MNP error-correction mode.

Example: AT\N2

Possible

Response:

OK

&Cn DCD Control

Description: The &Cncommand controls the Data Carrier

Detect (DCD) signal.

Syntax: AT&C

Parameters: = 0 or 1&C0= DCD is always ON.

&C1= DCD is ON only when the remote

modems data carrier is present.


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&Cn DCD Control

Examples: AT&C0AT&C1

Possible

Response:

OK

&Dn DTR Control

Description: The &Dncommand determines how the GSM

Data Module reacts when an ON-to-OFF Data

Terminal Ready (DTR) transition occurs.

Syntax: AT&D

Parameters: = 0, 1, or 2&D0= GSM Data Module ignores DTR

transitions.

&D 1= ON-to-OFF DTR transition causes the

GSM Data Module to change to

Command Mode while retaining the

connected call.

&D 2= ON-to-OFF DTR transition causes the

GSM Data Module to disconnect call and

change to Command Mode.

Examples: AT&D0AT&D2

Possible

Response:

OK

&Fn Restore Factory Defaults

Description: The &Fncommand sets all current parameters to

manufacturer defaults. The GSM Data Module

resets all current parameters to the manufacturer-defined profile.

Syntax: AT&F


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&Fn Restore Factory Defaults

Parameters: = 0

&F0= sets all GSM Data Module parameters to

the manufacturer defaults.

Example: AT&F0

Possible

Response:

OK

Notes: If the &Fncommand is the only command on the

command line, a delay of 300ms is needed before

issuing the next AT command line. Otherwise, the

OKresponse may be corrupted. There are no

restrictions for using &Fnwithin a command

string. (for example:AT&FS0=1&W+cbst=7,0,1)

&Kn Flow Control

Description: The &Kncommand sets the DTE/DCE flow

control type or disables flow control.

Syntax: AT&K

Parameters: = 0, 1, 2, 3, 4, or 5

&K0 = disable local flow control.

&K1= enable RTS/CTS hardware local flow

control.

&K2= enable XON/XOFF software local flow

control.

&K3= same as &K1.

&K4= same as &K2.

&K5= enable transparent XON/XOFF flow

control.

Examples: AT&K0AT&F2

Possible

Response:

OK


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&Qn Operational (Sync/Async)

Description: The &Qncommand allows the GSM Data

Module to operate asynchronously or

synchronously.

Syntax: AT&Q

Parameters: = 0, 1, 2, or 3

&Q0= asynchronous mode.

&Q1= asynchronous in Command Mode,

synchronous in Data Mode.

&Q2= when DTR goes ON, GSM Data Module

dials number stored using the &Z0

command and switches to synchronous

mode.

&Q3= synchronous when DTR is ON;

Command

Mode when DTR is OFF.

Examples: AT&Q0AT&Q3

Possible

Response:

OK

&Rn RTS/CTS Control

Description: The &Rncommand lets you determine the

relationship between the Clear To Send (CTS)

and Request To Send (RTS) signals.

Syntax: AT&R


&R0= CTS mimics the state of the RTS signal.

&R1= CTS is always ON. (DEFAULT)

Examples: AT&R0AT&R1

Possible OK


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&Rn RTS/CTS Control

Response:

&Sn DSR Control

Description: The &Sncommand controls the Data Set Ready

(DSR) signal.

Syntax: AT&S


&S0= DSR is always ON. (DEFAULT)

&S1= DSR is OFF when the GSM Data Module

is in Command Mode and ON when the

GSM Data Module is in Data Mode.

Examples: AT&S0AT&S1

Possible

Response:

OK

&Tn Loopback Test Mode

Description: The &Tncommand puts the GSM Data Module

into one of several diagnostic test modes or exitsa test mode.

Syntax: AT&T

Parameters: = 0, 1, 3, 4, 5, 6, 7, or 8

&T0= end any test in progress.

&T1= local analog loopback test.

&T3= local digital loopback test.

&T4= grant remote digital loopback from remote

modem.

&T5= deny remote digital loopback from remote modem.

&T6= remote digital loopback test.

&T7= remote digital loopback test with self-test.

&T8= local digital loopback test with self-test.


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&Tn Loopback Test Mode

Examples: AT&T1AT&T0

PossibleResponse:

OK

&Wn Store Current Configuration

Description: The &Wncommand stores the current parameter

settings to one of two user-defined profiles. The

profiles are maintained in the GSM Data

Modules nonvolatile memory.

Syntax: AT&W


0= store settings in profile 0. (DEFAULT)

1= store settings in profile 1.

Examples: AT&W0AT&W1

Possible

Response:

OK

Notes: Use the &Yncommand to specify which profile

the GSM Data Module is to use when it is first

turned on or reset using the Zncommand (see

page 81).

&V Display Current Configuration

Description: The &Vcommand display the GSM Data

Modules current parameter settings.

Syntax: AT&V


0= profile number 0.

1= profile number 1.


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Example: AT&V0

Possible

Responses: ACTIVE PROFILE:&C1 &D0 &S0

S0= 1 S1= 0 S2= 43 S3= 13 S4= 10 S5= 8

S14= 138 S21= 36 S31= 6 S32= 17 S33= 19

+CBST: 0, 0, 1

+CRLP: 61,61,48,6,7

+CRC: 0

+CR: 0

+FCLASS:0

+IFC: 2, 2

+ICF: 0, 3

+CMGF: 1+CSDH: 0

+ILRR: 0

+IPR: 0

+DS: 0, 0, 512, 6

+DR: 0

+CFUN: 0

+CSCS: "IRA"

+CMEE: 0

+CMOD: 0

+CREG: 0

$ICB: 1$ABRT: 1

+CLIP: 0

+COLP: 0

+CMEC: 2,2,2

+CIND: 0,0

+CMER: 0,0,0,0,1

+CALM: 0

+CRSL: 4

+CVIB: 0

+CLVL: 4

+CMUT: 0+CNMI: 0,0,0,0,0

$UIND: 0

+CLIR: 0

+CSMS: 0,1,1,1


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NPB_ME_C1_: +1949483119491 (first four

PB entries

in ME)

DDC_ME_C2_: 1972870219722NPB_ME_C3_: +1949483319493

DDC_ME_C4_: 1972870419724

OK

&Yn Designate User Profile

Description: The &Yncommand designates the stored profile

that the GSM Data Module is to use when it is

first turned on or reset with the Zncommand.

Syntax: AT&Y


&Y0= use parameter settings from profile 0.

&Y1= use parameter settings from profile 1.

Examples: AT&Y0AT&Y1

PossibleResponse: OK

+DR V.42bis Data Compression Reporting

Description: The +DRcommand determines whether or not

the intermediate result code of the current data

compression is reported by TA to TE after a

connection setup.

Syntax: AT+DR=


0= enable reporting. (DEFAULT)

1= disable reporting.


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+DR V.42bis Data Compression Reporting

Examples: AT+DR=0AT+DR=1

Possible

Response:

OK

+DR? Report Current +DR Command

Description: The +DR?command reports the current +DR

command in effect.

Syntax: AT+DR?

Parameters: None

Examples: AT+DR?

Possible

Response:

+DR:

OK

+DR=? List Supported Data Compression Values

Description: The +DR=?command lists the supportedv.42bis data compression values.

Syntax: AT+DR=?

Parameters: None

Example: AT+DR=?

Possible

Response:

+DR: (list of supporteds)

OK

+DS V.42bis Data Compression Control

Description: The +DScommand enables or disablesV.42bis


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+DS V.42bis Data Compression Control

data compression.

Syntax: AT+DS=[[,[,[,]]]]

Parameters: = 0, 1, 2, or 30= no compression.

1= transmit only.

2= receive only.

3= both directions, accept any direction.

= 0 or 1

0= do not disconnect if V.42bis is not negotiated

by the remote DCE as specified by .

1= disconnect if V.42bis is not negotiated by the

remote DCE as specified by .

the maximum number of dictionary entries that

should be negotiated, from 512 to 2048.

(DEFAULT is 512.)

the maximum string length to be negotiated, from

6 to 20. (DEFAULT is 6)

Examples: AT+DS=0AT+DS=1,0,512,6

Possible

Responses:

OK

+DS? Report Current +DS Command

Description: The +DS?command reports the current +DS

command in effect.

Syntax: AT+DS?

Parameters: None


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+DS? Report Current +DS Command

Examples: AT+DS=0AT+DS=1,0,512250

Possible

Response:

+DS: 1,0,512,6

OK

+DS=? Test +DS Command

Description: The +DS=?command tests the V.42bis data

compression mode of the GSM Data Module.

Syntax: AT+DS=?

Parameters: None

Example: AT+DS=?

Possible

Response:

+DS: 1,0,5,12,6

OK

+ICF DTE-to-DCE Character Framing

Description: The +ICFcommand determines the serial

interface character framing format and parity

received by the GSM Data Module from the

transmitting device.

Syntax: AT+ICF=[,[]]

Parameters: = 0, 1, 3, 4, or 5

0= auto-detect.

1= 8 data bits, 0 parity bit, 2 stop bits.

3= 8 data bits, 0 parity bit, 1 stop bit.

(DEFAULT)

4= 7 data bits, 0 parity bit, 2 stop bits.

5= 7 data bits, 1 parity bit, 1 stop bit.

= 0, 1, or 3

0= odd.

1= even.

3= space (0).


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+ICF DTE-to-DCE Character Framing

Examples: AT+ICF=1AT+ICF=2,1

PossibleResponse:

OK

Notes: Wait 300 ms after receiving the OKresponse

before issuing the next AT command line.

+ICF=? List Supported Format and Parity Settings

Description: The +ICF=?command lists the character

formats and parity settings that the GSM Data

Module supports.

Syntax: AT+ICF=?

Parameters: None

Example: AT+ICF=?

Possible

Response:

+ICF:(0,3-5),(0,1,3)

OK

+ICF? Report Current Format and Parity Settings

Description: The +ICF?command reports the current format

and parity settings in effect.

Syntax: AT+ICF?

Parameters: None

Example: AT+ICF?

Possible

Response:

+ICF:0,3

OK

+IFC Set Local Data Flow Control

Description: The IFCcommand determines whether flow


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+IFC Set Local Data Flow Control

control is used on the GSM Data Modules serial

port when the Module is in Data Mode. Flow

control stops the flow of data from the DTE to

avoid data loss during buffering.

Syntax: AT+IFC=[[,]]

Parameters: = one of the following flow control

methods from the DTEs point of view:

0= none.

1= XON/XOFF, dont pass characters to data stack.

2= line 133: ready for receiving. (DEFAULT)

= one of the following flow control

methods from the GSM Data Modules point of view:0= none.

1= XON/XOFF.

2= line 106, Clear to Send. (DEFAULT)

Examples: AT+IFC=0,0AT+IFC=1,1

Possible

Response:

OK

+IFC=? List Supported Flow Control Methods

Description: The +IFC=?command lists the flow control

methods that the GSM Data Module supports.

Syntax: AT+IFC=?

Parameters: None

Example: AT+IFC=?

Possible

Response:

+IFF: (0-2),(0-2)

OK


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+IFC? Report Current +Flow Control Method

Description: The +IFC?command reports the current flow

control method in effect.

Syntax: AT+IFC?

Parameters: None

Example: AT+IFC?

Possible

Response:

IFC: 2,2

OK

+ILRR Report Local Port Rate

Description: The ILRRcommand determines whether an

intermediate result code of local rate is reported

from the DCE to the DTE during connection

setup. The rate reported represents the current

negotiated or renegotiated DTE-DCE rate.

Syntax: AT+ILRR=


0= disable reporting or local port rate. (DEFAULT)

1= enable reporting or local port rate.

Examples: AT+ILRR=0AT+ILRR=1

Possible

Response:

+ILLR:

OK

Where is the port rate setting on call

connection in bauds per second

300

1200

2400

4800

9600

19200(DEFAULT)

28800


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+ILRR Report Local Port Rate

38400

57600

+ILRR=? List Supported Local Port Rate Values

Description: The ILRR=?command lists the supported local

port rate values.

Syntax: AT+ILRR=?

Parameters: None

Example: AT+ILRR=?

Possible

Response:

+ILRR: (list of supported s)

OK

+ILRR? Report Current Port Rate Value

Description: The +ILRR?command reports the current port

rate value in effect.

Syntax: AT+ILRR?

Parameters: None

Example: AT+ILRR?

Possible

Response:

ILRR:OK

+IPR Set Terminal Equipment Rate

Description: The IPRcommand sets the data rate on the GSM

Data Modules serial interface. The Module

accepts rates from 300 to 57,600 bps. The rate

takes effect following the result code issued afterthis command executes.

Syntax: AT+IPR=

Parameters: = one of the following baud rates:


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+IPR Set Terminal Equipment Rate

300

1200

2400

4800

9600 (DEFAULT)19200

28800

38400

57600

115200

Examples: AT+IPR=9600AT+IPR=57600

Possible

Response:

OK

Notes: If this command is the only one on the command

line, wait 300 ms before issuing the next AT

command line. Otherwise the OKresponse may

be corrupted. However, there are no restrictions

on using this command in a command string.

(e.g., AT&Fs0=1+ipr=9600&W+cbst=7,0,1 )

The GSM Data Module does not support

autobauding.

+IPR=? List Supported Fixed-Only Rates

Description: The +IPR=?command lists the fixed-only rates

that are supported on the GSM Data Modules

serial interface.

Syntax: AT+IPR=?

Parameters: None

Example: AT+IPR=?

Possible

Response:

+IPR: (list of supported autodetectable

values)[,list of fixed-only values)]

OK


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+IPR? Report Current Serial Interface Rate

Description: The +IPR?command reports the current rate on

the GSM Data Modules serial interface.

Syntax: AT+IPR?

Parameters: None

Example: AT+IPR?

Possible

Response:

+IPR: (0,2400,4800,9600,19200,38400,

57600,115200),(300,600,1200,14400,76800)

OK

Fax Commands

+FCLASS Set Service Class to Fax or Data Mode

Description: The +FCLASScommand specifies data or

fax operation and prepares the GSM Data

Module to process information accordingly.

Syntax: AT+FCLASS=


0= data operation. (DEFAULT)

1= fax operation.

8= voice operation.

Examples: AT+FCLASS=0AT+FCLASS=1

Possible

Responses:

OKif syntax is satisfactory; otherwise,

ERROR.

+FCLASS=? List Supported Service Classes

Description: The +FCLASS=?command lists the


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+FCLASS=? List Supported Service Classes

supported service classes.

Syntax: AT+FCLASS=?

Parameters: None

Example: AT+FCLASS=?

Possible

Responses:

+FCLASS: (0, 1, 8)

OK

Otherwise, ERROR

+FCLASS? Report Current Service Class

Description: The +FCLASS?command reports the

current service class in effect.

Syntax: AT+FCLASS?

Parameters: None

Example: AT+FCLASS?

Possible

Responses:

+FCLASS:

where = 0, 1, or 8 (DEFAULT is 0)

OK

Otherwise, ERROR

+FRH Receive Data with HDLC

Description: The +FRHcommand lets the GSM Data

Module receive data using the HDLC

protocol and the defined modulation.

Syntax: AT+FRH=

Parameters: = 3

3= V.21 channel 2 300 bps.


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+FRH Receive Data with HDLC

Example: AT+FRH=3

Possible

Responses:

+FRH:

OKif GSM Data Module is off-hook.

ERRORif GSM Data Module is on-hook.

+FRH=? Report Current +FRH Command

Description: The +FRH=?command reports the current

+FRHcommand in effect.

Syntax: AT+FRH=?

Parameters: None

Example: AT+FRH=?

Possible

Responses:

+FRH: (3)

OK

for V.21 channel 2 300 bps.


+FRM Receive Data According to the Defined

Modulation

Description: The +FRMcommand receives data

according to the defined data rate.

Syntax: AT+FRM=

Parameters: = 24, 48, 72, 73, 74, 96, 97, 121, 122,

145, or 146

24= V.27ter 2400 bps.

48= V.27ter 4800 bps.

72= V.29 7200 bps long.

73= V.17 7200 bps short.


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+FRM Receive Data According to the Defined

Modulation

96= V.29 9600 bps.

97= V.17 9600 bps long.

121= V.17 12000 bps long.

122= V.17 12000 bps short.145= V.17 14400 bps long.

146= V.17 14400 bps short.

Examples: AT+FRM=24AT+FRM=146

Possible

Responses:

OKif GSM Data Module is off-hook.


+FRM=? Report Current +FRM Command

Description: The +FRM=?command reports the current

+FRMcommand in effect.

Syntax: AT+FRM=?

Parameters: None

Example: AT+FRM=?

Possible

Responses:

+FRM: (24, 28, 72, 73, 96, 97, 121, 122,

145, 146)

OK

ERRORif the GSM Data Module is on-

hook.

+FRS Receive Silence

Description: The +FRScommand defines the wait forsilence *10ms intervals.

Syntax: AT+FRS=


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+FRS Receive Silence

Parameters: = 0-255

Examples: AT+FRS=50AT+FRS=1125

Possible

Responses:

OKafter *10ms silence interval

elapses. ERRORif the GSM Data Module is

on-hook.

Notes: The command aborts if any character is

received from the DTE (the response will

still be OK).

+FRS=? Report Current +FRS Command

Description: The +FRS=?command reports the current

+FRScommand in effect.

Syntax: AT+FRS=?

Parameters: None

Example: AT+FRS=?

Possible

Responses:

OKafter *10ms silence interval

elapses. ERRORif the GSM Data Module ison-hook.


received from the DTE (The response will

still be OK).

+FTH Transmit Data with HDLC

Description: The +FTHcommand transmits data using

the HDLC protocol and the definedmodulation.

Syntax: AT+FTH=


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+FTH Transmit Data with HDLC

Parameters: = 3

3= V.21 channel 2 300 bps.

Example: AT+FTH=3

Possible

Responses:

+FTH: (3) OKfor V.21 channel 2 300 bps.


+FTH=? Report Current FTH Command

Description: The +FTH=?command reports the current

+FTHcommand in effect.

Syntax: AT+FTH=?

Parameters: None

Example: AT+FTH=?

Possible

Responses:

+FTH: (3) OKfor V.21 channel 2 300 bps.


+FTS Stop Transmission and Wait

Description: The +FTScommand stops any currenttransmission and waits for *10ms

intervals.

Syntax: AT+FTS=

Parameters: = 0-255

Examples: AT+FTS=50AT+FTS=1125

Possible

Responses:

OKafter *10ms silence intervalelapses. ERRORif the GSM Data Module is

on-hook.



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+FTS Stop Transmission and Wait


still be OK).

+FTS=? Report Current +FTS Command

Description: The +FTS=?command reports the current

+FTScommand in effect.

Syntax: AT+FTS=?

Parameters: None

Example: AT+FTS=?

PossibleResponses:

OKafter *10ms silence intervalelapses. ERRORif the GSM Data Module is

on-hook.



still be OK).

GSM Commands

+CACM Accumulated Call Meter (ACM) Reset or

Query

Description: The +CACMcommand resets the Advice of

Charge related to the accumulated call meter

(ACM) value in SIM file EF(ACM). ACM

contains the total number of home units for

both the current and preceding calls.

Syntax: AT+CACM=[]

Parameters:


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+CACM Accumulated Call Meter (ACM) Reset or

Query

string type: SIM PIN2

Example: AT+CACM=1234

Possible

Responses:

OK

If error is related to ME functionality:

+CME ERROR:

See subclause 9.2 for values.

+CACM? Return Current ACM Value

Description: The +CACM ?command returns the GSM

Data Modules current accumulated call

meter value.

Syntax: AT+CACM?

Parameters: None

Example: AT+CACM?

PossibleResponses:

+CACM: OK

Where is a string-type; accumulated

call meter value similarly coded as

under +CAOC.

+CME ERROR:


+CALA Alarm

Description: The +CALAcommand sets an alarm time inthe ME. There can be an array of different

types of alarms.

Syntax: AT+CALA=[,[,


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+CALA Alarm[,[,[,]]]]]

Parameters:

String-type value; format isyy/MM/dd,hh:mm:sszz, 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 1994, 22:10:00 GMT+2 hours equals

94/05/06,22:10:00+08.

, ,

integer-type value indicating the index of the

alarm; default is manufacturer specific.

integer-type value indicating the type of the alarm

(e.g., sound, volume, LED); values and default

are manufacturer specific.

string-type value indicating the text to be

displayed when alarm time is reached; maximum

length .

integer-type value indicating the maximum length

of .

string-type value indicating day of week for the

alarm in one of the following formats:

[,[]] Sets a recurrent alarm for

one or more days in the week. The digits 1 to 7

corresponds to the days in the week, Monday (1),

, Sunday (7).

Example: The string 1,2,3,4,5may be used to set

an alarm for all weekdays.

0= sets a recurrent alarm for all days in the week.


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+CALA Alarm

integer-type value indicating the maximum length

of

= 0 or 1

integer-type value indicating if the alarm is silent

or not.

0= the alarm will not be silent.

1= the alarm will be silent and the only result

from the alarm is the unsolicited result code

+CALV.

Examples: AT+CALA=[,[,[,[,[,]]]]]

Possible

Responses:

Example of text alarm result code:

AT+CALA="01/05/25,16:01:00-08",1,0,

"Conexant Alarm Test"

OK

Example of LED alarm result code:

AT+CALA=01/05/25,16:03:00-08,1,1

OK

If invalid value is entered:

+CME ERROR:


+CALA=? List Supported Alarm Settings

Description: The +CALA=?command lists supported

array index values, alarm types, and

maximum length of the text to be displayed.

Syntax: AT+CALA=?

Parameters: None

Example: ATCALA=?


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+CALA=? List Supported Alarm Settings

Possible

Responses:

+CALA:(list of supported s),(list of

supported s),

OK


+CME ERROR:


+CALA? List Current Alarm Settings

Description: The +CALA?command returns the list of

current active alarm settings in the ME.

Syntax: AT+CALA?

Parameters: None

Example: AT+CALA?

Possible

Responses:

If alarm has expired:

+CALA:

OK

If a problem is encountered:

+CME ERROR:


+CALM Alert Sound Mode

Description: The +CALMcommand selects the general

alert sound mode of the ME.

Syntax: AT+CALM=


0= normal mode.

1= silent mode (all sounds from ME are

prevented).

Example: AT+CALM=0


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+CALM Alert Sound Mode

Possible

Response:

OK


+CME ERROR: See subclause 9.2 for values.

+CALM=? Report Supported Alert Sound Modes

Description: The +CALM=?command returns supported

values as compound value.

Syntax: ATCALM=?

Parameters: None

Example: ATCALM=?

Possible

Responses:

+CALM:(list of supported s)

+CME ERROR:


+CALM? Report Current Alert Sound Mode

Description: The +CALM?command shows the current

alert sound mode.

Syntax: AT+CALM?

Parameters: None

Example: AT+CALM?

Possible

Responses:

+CALM:

+CME ERROR:



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+CAMM Accumulated Call Meter Maximum

Description: The +CAMMcommand sets the Advice of

Charge related to the accumulated call meter

maximum value in SIM file EF(ACMmax).

ACMmax contains the maximum number ofhome units allowed to be consumed by the

subscriber.

Syntax: AT+CAMM=[[,]]

Parameters:

string type; accumulated call meter maximum

value similarly coded as under

+CAOC; 0= disables ACMmax feature.

string type; SIM PIN2

Example: AT+CAMM=0,password

Possible

Responses:

OK


+CME ERROR:


+CAMM? Report Current ACMmax Value

Description: The +CAMM?command returns the current

value of ACMmax.

Syntax: AT+CAMM?

Parameters: None

Example: AT+CAMM=?

Possible

Responses:

+CAMM:

OK

where is the max. ACM value in


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+CAMM? Report Current ACMmax Value

hexadecimal format (e.g., 00001Eindicates

decimal value 30).

+CME ERROR:


+CAOC Advice of Charge Command

Description: The +CAOCcommand sets the Advice of

Charge supplementary service function

mode. This mode lets subscribers obtain

information about a calls cost.

Syntax: AT+CAOC=


0= query CCM value.

1= deactivate the unsolicited reporting of

CCM value.

2= activate the unsolicited reporting of CCM

value.

string type; three bytes of the current CCM

value in hexadecimal format (e.g., 00001E

indicates decimal value 30); bytes are similarly

coded as ACMmax value in the SIM

000000-FFFFFF

Example: AT+CAOC=2

Possible

Responses:


+CME ERROR:

If =0, TA returns the current call

meter (CCM) value

+CAOC:

OK

If =1, TA deactivates the unsolicited

reporting of CCM value


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+CAOC Advice of Charge Command

OK

If =2, TA activates the unsolicited

reporting of CCM value

OK

+CAOC=? List Supported Advice of Charge Modes

Description: The +CAOC=?command lists the Advice of

Charge modes that the GSM Data Module

supports.

Syntax: AT+CAOC=?

Parameters: None

Example: AT+CAOC=?

Possible

Response:

+CAOC: (list of supporteds)

OK

+CAOC? Report Current Advice of Charge Mode

Description: The +CAOC?command reports the GSM

Data Modules current Advice of Charge

mode.

Syntax: AT+CAOC?

Parameters: None

Example:

Possible

Response:

+CAOC:

OK

+CBC Battery Charge

Description: The +CBCcommand allows the TA to return

battery connection status and battery


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+CBC Battery Charge

charge level values.

Syntax: AT+CBC

Parameters: None

Example: AT+CBC

Possible

Responses:

+CBC: ,

OK

where

= 0 or 1

0 = ME is powered by the battery.

1 = ME has a battery connected, but is not

powered by it

= 0 or 100

0= battery is exhausted.

100 =battery has full capacity remaining.

+CBC=? List Supported Battery Charge Values

Description: The +CBC=?command lists the battery

charge values that the GSM Data Module

supports.

Syntax: AT+CBC=?

Parameters: None

Example: AT+CBC=?

Possible

Response:

+CBC: (list of supporteds),(list of

supported s)

OK

+CBST Select Bearer Service

Description: The +CBSTcommand selects the bearer

service with data rate and


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+CBST Select Bearer Service

the connection element to be used when

data calls are originated. Values may also be

used during mobile terminated data call

setup, especially in case of single numbering

scheme calls.

Syntax: AT+CBST=[] [,[,]]]

Parameters: =0-2, 4-7, 14, 65, 66, 68, 70, 71, or 75

0= autobauding. (DEFAULT)

1= 300 bps (V.21).

2= 1200 bps (V.22).

4= 2400 bps (V.22bis).

5= 2400 bps (V.26ter).

6= 4800 bps (V.32).

7= 9600 bps (V.32).

65= 300 bps (V.110).

66= 1200 bps (V.110).

68= 2400 bps (V.110).

70= 4800 bps (V.110).

71= 9600 bps (V.110).

75= 14400 bps (V.110).

= 0 or 2

0= data circuit asynchronous modem.

(DEFAULT)

2= PAD Access (asynchronous)

= 0 or 1

0= transparent.

1= non-transparent. (DEFAULT)

Example: AT+CBST=1,0,0

Possible

Response:

OK

+CBST=? List Supported Bearer Services

Description: The +CBST=?command lists the bearer


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+CBST=? List Supported Bearer Services

services that the GSM Data Module supports.

Syntax: AT+CBST=?

Parameters: None

Example: AT+CBST=?

Possible

Response:

+CBST: (list of supported , list of

supported, list of supported )

OK

+CBST? Report Current Bearer Service

Description: The +CBST?command reports the currentbearer service.

Syntax: AT+CBST?

Parameters: None

Example: AT+CBST?

Possible

Responses:

+CBST: ,,

OK

+CCED Cell Environment Description

Description: The +CCEDcommand can be used by the

application to retrieve the cell parameters of

the main cell and of up to six neighbor cells.

Two ways may exist for the external

application to know these cell parameters: on

request of the application, or automatically

by the module every 5 seconds. Theautomatic mode is not supported during

communication or registration.

Syntax: AT+CCED=[,]


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+CCED Cell Environment Description


0= one shot requested.

1= automatic shots requested.

2= stop automatic shots.

= 1, 2, or 3

1= main cell.

MCC, MNC, LAC, CellId, BSIC,

ARFCN, RxLev, RxLev Full, RxLevSub,

RxQual, RxQual Full, RxQual Sub, Idle

TS

2= neighbor cell.


ARFCN, RxLev

3= all cell.


ARFCN, RxLev, RxLev Full, RxLevSub,

RxQual, RxQual Full, RxQual Sub, Idle

TS, MCC, MNC, LAC, CellId, BSIC,

ARFCN, RxLev

Combination (addition of the values) of the

requested dumped are supported. Notice that

in idle mode, only RxLev measures (one the

main cell and on the neighbor cells) are done.

The value of these RxLev is set in the RxLev

Full field for the main cell.

Example: AT+CCED=0,1

Possible

Response:

+CCED:, ... ,

OK

+CCFC Call Forwarding and Conditions

Description: The +CCFCcommand allows control of the

call forwarding supplementary service

according to 3GPP TS 22.082 [4].

Registration, erasure, activation,

deactivation, and status query are supported.


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When querying the status of a network

service (=2) the response line for 'not

active' case (=0) should be returned

only if service is not active for any .

Syntax: AT+CCFC=, [, [, [, [,[,[,]]]]]]

Parameters: = 0, 1, 2, 3, 4, or 5

0= unconditional. (DEFAULT)

1= mobile busy.

2= no reply.

3= not reachable.

4= all call forwarding (0-3).

5= all conditional call forwarding (1-3).

= 0, 1, 2, 3, or 4

0= disable. (DEFAULT)

1= enable.

2= query status.

3= registration.

4= erasure.

string type phone number of forwarding address

in format specified by

type of address in integer format; DEFAULT is

145when dialing string includes

international access code character +; otherwise,

129.

string type subaddress of format specified by

.

type of subaddress in integer; DEFAULT is 128.

= 1, 2, 4, or 7


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1= voice.

2= data.

4= fax.

7= all classes. (DEFAULT)

time to wait before call is forwarded, rounded to

a multiple of 5 sec. DEFAULT is 20.

1...20...30(only for = no reply)

= 0 or 1

0= not active.

1= active.

Example: AT+CCFC=1,1,5551212

Possible

Response:

OK

+CCFC=? List Supported Call Forwarding Reasons

Description: The +CCFC=?command lists the call

forwarding reasons that the GSM Data

Module supports.

Syntax: AT+CCFC=?

Parameters: None

Example: AT+CCFC=?

Possible

Responses:

+CCFC: (list of supported

OK

+CCLK Clock

Description: The +CCLKcommand sets the real-time

clock of the ME.

Syntax: AT+CCLK=


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+CCLK Clock

Parameters:

String-type value; format is

yy/MM/dd,hh:mm:sszz, where characters

indicate year (two last digits), month, day, hour,

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

between the local time and GMT; range -

47...+48); e.g. 6th of May 1994, 22:10:00

GMT+2 hours equals

94/05/06,22:10:00+08.

Example: AT+CCLK=01/05/25,15:00:00-08

Possible

Response:

OK

If setting fails in an ME error:

+CME ERROR:


+CCLK? Read Current Clock Setting

Description: The +CCLK?command reads the current

clock setting.

Syntax: AT+CCLK=?

Parameters: None

Example: AT+CCLK?

Possible

Responses:

+CCLK:01/05/25.16:01:00-08

OK

If an ME error occurs:

+CME ERROR:


If the ME does not support time zone

information, the three last characters of

are not returned. The format of


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+CCLK? Read Current Clock Setting

is specified by use of the +CSDF

command.

+CCUG Closed User Group

Description: The +CCUGcommand sets the closed user

group supplementary service parameters as a

default adjustment for all following calls.

Syntax: AT+CCUG=[] [,[,]]]


0= disable CUG. (DEFAULT)

1= enable CUG.

= 09, or 10

0...9= CUG index. (DEFAULT = 0)

10= no index (preferred CUG taken from

subscriber data).

= 0, 1, 2, or 3

0= no information. (DEFAULT)

1= suppress OA (Outgoing Access).

2= suppress preferential CUG.3= suppress OA and preferential CUG.

Example: AT+CCUG=1,9,2

Possible

Response:

OK

+CCUG=? List Supported Closed User Groups

Description: The +CCUG=?command lists the closeduser groups that the GSM Data Module

supports.

Syntax: AT+CCUG=?


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+CCUG=? List Supported Closed User Groups

Parameters: None

Example: AT+CCUG=?

PossibleResponses:

OK

+CCUG? Report Current Closed User Group

Description: The +CCUG?command reports the current

closed user group configured for the GSM

Data Module.

Syntax: AT+CCUG?

Parameters: None

Example: AT+CCUG?

Possible

Responses:

+CCUG: ,,

OK


+CME ERROR:

+CCWA Call Waiting

Description: The +CCWAcommand controls the call

waiting supplementary service. Activation,

deactivation and status query are supported.

It should be possible to abort the command

when network is interrogated.

Syntax: AT+CCWA=[][,[,]]]


0= disable presentation of unsolicited result

code. (DEFAULT)

1= enable presentation of unsolicited result

code.


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+CCWA Call Waiting

= 0, 1, or 2

when parameter not given, network

is not interrogated

0= disable.1= enable.

2= query status.

= 1, 2, 4, or 7

a sum of integers each representing a class

of information

1= voice (telephony)

2= data (usually refers to all bearer

services,

if =2, this may refer only to

some bearer services).

4= fax.

7= all classes. (DEFAULT)

= 0 or 1

0= not active.

1= enable.

Examples: AT+CCWA=1,1,1AT+CCWA=1,2

Possible

Response:

OK

+CCWA=? List Supported Call Waiting Values

Description: The +CCWA=?command returns a list of

the call waiting values that the GSM Data

Module supports.

Syntax: AT+CCWA=?

Parameters: None

Example: AT+CCWA=?


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+CCWA=? List Supported Call Waiting Values

Possible

Responses:

+CCWA:

OK

+CCWA? Report Current Call Waiting Status

Description: The +CCWA?command shows whether

current call waiting is enabled or disabled.

Syntax: AT+CCWA?

Parameters: None

Example: AT+CCWA?

Possible

Response:

+CCWA:

OK

+CCWE Call Meter Maximum Event

Description: Shortly before the ACM (Accumulated Call

Meter) maximum value is reached, an

unsolicited result code +CCWVis sent, if

enabled by this command. The warning is

issued approximately when 30 seconds call

time remains. It is also issued when starting a

call if less than 30 s call time remains. Ifsetting fails in an ME error, +CME

ERROR: is returned. Refer subclause

9.2 for values.

Syntax: AT+CCWE=


0= disable the call meter warning event.

(DEFAULT)

1= enable the call meter warning event.

Examples: AT+CCWE=1AT+CCWE=2

Possible OK


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+CCWE Call Meter Maximum Event

Response:

+CCWE=? List Supported Call Meter Maximum

Modes

Description: The +CCWE=?command returns a list of

the supported call meter maximum event

modes.

Syntax: AT+CCWE=?

Parameters: None

Example: AT+CCWE=?

Possible

Responses:

+CCWE:

OK

+CCWE? Report Current Call Meter Maximum

Event Mode

Description: The +CCWE?command shows the current

call meter maximum event mode.

Syntax: AT+CCWE?

Parameters: None

Example: AT+CCWE?

Possible

Response:

+CCWE:

OK

+CDIS Display Control

Description: The +CDIScommand writes the contents ofME text type display elements. An element

can consist of one character or

several characters. The order of element

parameters should be as follows: first


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+CDIS Display Control

is the element in upper-left corner, second is

the next element to the right, and so on. The

last element is the element in lower-right

corner. The number of elements is ME

specific. If element parameter is empty,element will remain in the previous value.

Syntax: AT+CDIS=[[,[,...]]]

Parameters:

String type parameter using character set

specified by the command +CSCS.

Example: AT+CDIS="RADIOGSM

Possible

Responses:

OK

If the ME does not allow writing to its display

or if the ME is not currently reachable:

+CME ERROR:


+CDIS=? List Supported Character Sets

Description: The +CDIS=?command returns the contentsof ME display elements.

Syntax: AT+CDIS=?

Parameters: None

Example: AT+CDIS=?

Possible

Responses:

+CDIS: [,[,...]]

OK

where = integer type parametergiving the maximum length of corresponding

parameter.

If the ME does not allow writing to its


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+CDIS=? List Supported Character Sets

display or if the ME is not currently

reachable:

+CME ERROR:


+CDIS? Report Current Character Set

Description: The +CDIS?command returns the maximum

length of each display element. If the ME

does not offer the length of elements, the

field should be empty.

Syntax: AT+CDIS?

Parameters: None

Example: AT+CDIS?

Possible

Responses:

+CDIS: [,[,...]]

OK

where is a string-type parameter using

character set specified by the command

+CSCS.

If the ME does not allow writing to its

display or if the ME is not currently

reachable:

+CME ERROR:


+CEER Extended Error Reporting

Description: The +CEERcommand returns an extended

report for the reason of the failure in the last

unsuccessful call setup (originating or

answering). Typically, the text consists of a

single line containing the failure information

given by GSM network in textual format.

Syntax: AT+CEER


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+CEER Extended Error Reporting

Parameter: None

Example: AT+CEER

PossibleResponse:

+CEER:OK

where is the reason for last call

release as number code.

+CEER =? Test Extended Error Reporting

Description: The +CEER=?command is a test command.

Syntax: AT+CEER=?

Parameters: None

Example: AT+CEER=?

Possible

Response:

OK

+CFUN Set Phone Functionality

Description: The +CFUNcommand selects the level of

functionality in the mobile station.

Syntax: AT+CFUN=

Parameters:

the ID to be set, as described in the examples.

Examples: When the application wants to stop the module

to make a power off, or if the application

wants to force the module to execute an IMSI

DETACH procedure, it has to send:

AT+CFUN=0

This command executes an IMSI DETACH

and makes a backup of some internal


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+CFUN Set Phone Functionality

parameters in the SIM and the EEPROM. Then

no access to the SIM card is possible.

If the mobile is not powered off after this

command, it shall receive another command tore-start the whole GSM process.

If the mobile is turned off after this command,

the power-on automatically executes the start

of the whole GSM process.

When the application wants to re-start the

module (after having done a AT+CFUN=0

command, and without having cut the power

supply), it must send: AT+CFUN=1

This command starts again all the GSM stack

and GSM functionality and a complete

software reset is done. All parameters are reset

to their previous E2P value if AT&Wwas not

used.

If you write entries in phonebook (+CPBW)

and then reset the module directly

(AT+CFUN=1, without any AT+CFUN=0

before), some entries may not be written (SIM

task did not have enough time to write the

entries in SIM card)

Also, the OKresponse will be sent at the last

defined baud rate defined by +IPRcommand.

With autobauding the response can be at a

different baud rate, so it is better to save the

defined baud rate with AT&Wbefore directly

send the AT+CFUN=1command.

Possible

Response:

OK

+CFUN? Report Current Phone Functionality

Description: The +CFUN?command reports the GSM


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+CFUN? Report Current Phone Functionality

Data Modules current phone functionality.

Syntax: AT+CFUN?

Parameters: None

Example: AT+CFUN?

Possible

Response:

+CFUN: 1

OK

+CFUN=? List Supported Phone Functionality

Description: The +CFUN=?command is a test command.

Syntax: AT+CFUN=?

Parameters: None

Example: AT+CFUN=?

Possible

Response:

+CFUN: 1

OK

+CGMI Report Manufacturer Identification

Description: The +CGMIcommand reports the GSM

Data Modules manufacturer identification.

Syntax: AT+CGMI

Parameters: None

Examples: AT+CGMI

Possible

Response:

CONEXANT

OK


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+CGMM Request Module ID

Description: The +CGMMcommand reports the specific

model of the GSM Data Module.

Syntax: AT+CGMM

Parameters: None

Example: AT+CGMM

Possible

Response:

+GSMDM100DB

OK

+CGMR Request Revision ID

Description: The +CGMRcommand reports the GSM

Data Modules software version.

Syntax: AT+CGMR

Parameters: None

Example: AT+CGMR

Possible

Response:

Revision x.yy

OK

+CGSN Request Product Serial Number

Identification

Description: The +CGSNcommand allows the user

application to ascertain the GSM modules

International Mobile Equipment Identify

(IMEI).

Syntax: AT+CGSN

Parameters: None

Example: AT+CGSN


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+CGSN Request Product Serial Number

Identification

Possible

Response:

135790248939

OK

+CHLD Call Hold

Description: The +CHLDcommand allows the control of

the following call-related services:

A call can be temporarily disconnectedfrom the ME but the connection is

retained by the network.

Multiparty conversation (conferencecalls).

the served subscriber who has two calls(one held and the other either active or

alerting) can connect the other.

Parties and release the served subscriber'sown connection.

Calls can be put on hold, recovered, released,

added to conversation, and transferred

similarly as defined in 3GPP TS22.030 [19]. Refer subclause 9.2 for possible

values.

This is based on the GSM/UMTS

supplementary services HOLD (Call Hold;

refer 3GPP TS 22.083 [5] clause 2),

MPTY (MultiParty; refer 3GPP TS 22.084

[22]) and ECT (Explicit Call Transfer; refer

3GPP TS 22.091 [29]). The interaction of

this command with other commands based

on other GSM/UMTS supplementaryservices is described in the GSM/UMTS

standards.

Call Hold, MultiParty, and Explicit Call


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+CHLD Call Hold

Transfer are only applicable to teleservice

11.

It is recommended (although optional) that

test command returns a list of operationswhich are supported. The call

number required by some operations shall be

denoted by x (e.g.,+CHLD:

(0,1,1x,2,2x,3)).

Syntax: AT+CHLD=

Parameters: = 0, 1, 1X, 2, 2X, or 3

0= terminate all held calls or UDUB (User

Determined User Busy) for a waiting call

1= terminate all active calls (if any) and

accept

the other call (waiting call or held call).

1X= terminate the active call numberX(X=

1-7).

2= place all active calls on hold (if any) and

accept the other call (waiting call or held

call) as the active call.

2X= place all active calls except callX(X= 1-

7) on hold.

3= add the held call to the active calls.

Example: AT+CHLD=1

Possible

Response:

OK

+CHLD=? List Supported Call Hold Parameters

Description: The +CHLD=?command lists the supported

call hold parameters

Syntax: AT+CHLD=?

Parameters: None


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+CHLD=? List Supported Call Hold Parameters

Example: AT+CHLD=?

Possible

Response:

+CHLD:s

OK

+CHUP Select Hang Up Call

Description: The +CHUPcommand causes the TA to

hang up the current call.

Syntax: AT+CHUP

Parameters: None

Example: AT+CHUP

Possible

Responses:

OK/ERROR

All active calls and held calls are cleared

down.

+CHUP=? Report Hang Up

Description: The +CHUP=?command reports whether

the current call has been hung up

Syntax: AT+CHUP=?

Parameters: None

Example: AT+CHUP=?

Possible

Response:

OK

+CIMI Request International Mobile SubscriberIdentity

Description: The +CIMIcommand reads and identifies

the International Mobile Subscriber Identity


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+CIMI Request International Mobile Subscriber

Identity

(IMSI) of the attached SIM card.

Syntax: AT+CIMI

Parameters: = International Mobile Subscriber

Identity (string without double quotes)

Example: AT+CIMI

Possible

Responses:

001010123456789

OK


+CME ERROR:

+CIMI=? List International Mobile Subscriber

Identity

Description: The +CIMI=?command reports the

International Mobile Subscriber Identity.

Syntax: AT+CIMI=?

Parameters: = International Mobile Subscriber

Identity (string without double quotes).

Example: AT+CIMI=?

Possible

Response:

OK

+CIND Indicator Control

Description: The +CINDcommand sets the values of the

ME indicators. An value of 0 means

that the indicator is off (or in state which

can be identified as "off"-state), 1 means that

indicator is on (or in a state which is more

substantial than "off"-state), 2 is more

substantial than 1, and so on. If the indicator


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+CIND Indicator Control

is a simple on/off style element, it has values

0 and 1.

The number of elements is ME specific. If a

certain indicator is not writable, setting of itshould be ignored. If a parameter is empty

field, the indicator remains in the previous

value.

Syntax: AT+CIND=[[,[,...]]]

Parameters:

an integer type value in the range

corresponding to .

Example: AT+CIND=0

Possible

Responses:

OK

If the ME does not allow setting of indicators

or ME is not currently reachable:

+CME ERROR:


+CIND=? Return Status of Indicators

Description: The +CIND=?command returns the status of

the ME indicators.

Syntax: AT+CIND=?

Parameters: None

Example: AT+CIND=?

Possible

Responses:

+CIND: (,(list of supporteds)) [,(,(list of supported

s))[,...]]

where = values reserved by the


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+CIND=? Return Status of Indicators

present document and their ranges:

battchg= battery charge level (0-5).

signal= signal quality (0-5).

service= service availability (0-1).

sounder= sounder activity (0-1). message= message received (0-1).

call= call in progress (0-1).

vox= transmit activated by voice activity

(0-1).

roam= roaming indicator (0-1).

Smsfull= a short message memory storage

in the MT has become full (1), or memory

locations are available (0).



+CME ERROR:


+CIND? Report Current Indicator Status

Description: The +CIND?command returns a maximum

16-character description of the indicator and

Compound value is the allowed values for

the indicator.

Syntax: AT+CIND

Parameters: None

Example: AT+CIND

Possible

Responses:

+CIND: [,[,...]]

OK

where is an integer type value in the

range of the corresponding .



+CME ERROR:


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+CKPD Keypad Control

Description: The +CKPDcommand provides keypad

control. When you send this command:

If any call is in progress: then thiscommand should decrease/increase the

audio volume

If there is no call in progress : thiscommand should decrease/increa

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