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TC63_ATC_V00.490

Page 272 of 501

5/24/05

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The test command is used for requesting information on the supported GPRS service states. 
The read command returns the current GPRS service state. 
The write command is used to attach the MT to, or detach the MT from the GPRS service. After the command

has completed, the MT remains in V.250 command state. If the MT is already in the requested state, the com-

mand is ignored and the OK response is returned. Any active PDP contexts will be automatically deactivated

when the attachment state changes to detached. 

Indicates the state of GPRS attachement.
0

(P)

detached

[1]

attached

• If the MT is in dedicated mode, write command returns "+CME ERROR: operation temporary not allowed". 
• When the module is GPRS attached and a PLMN reselection occurs to a non-GPRS network or to a network

where the SIM is not subscribed to for using GPRS, the resulting GMM (GPRS mobility management) state

according to GSM 24.008 is REGISTERED/NO CELL, meaning that the read command will still show

=1. 

Test Command

AT+CGATT=?

Response(s)

+CGATT: 

(list of supported 

OK

Read Command

AT+CGATT?

Response(s)

OK

Write Command

AT+CGATT=

[

]

Response(s)

OK

ERROR

+CME ERROR

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

GSM 07.07

%

%

%

%

%

%

%

!

!

!

<state>

(num)