Siemens MC55 AT manual 11.3 AT+CGATT Gprs attach or detach, At+Cgatt=?, At+Cgatt?, State=1

11.3AT+CGATT GPRS attach or detach

Syntax

Test Command

AT+CGATT=?

Response(s)

+CGATT: (list of supported <state>s)

OK

Read Command

AT+CGATT?

Response(s)

+CGATT: <state>

OK

Write Command

AT+CGATT=[<state>]

Response(s)

OK ERROR +CME ERROR

Reference(s)

GSM 07.07

PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last

% % % % % % ! ! !

Command Description

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.

If the MT is not able to attach for more than 5 minutes, command returns "ERROR" or "+CME ERROR: unknown", but MT is still trying to attach.

If the MT is not able to detach for more than 1 minute, command returns "ERROR" or "+CME ERROR: unknown", but MT is still trying to detach. If an attach is issued during a running detach, command returns "ERROR" or "+CME ERROR: unspecified GPRS error".

Parameter Description

<state>(num)

Indicates the state of GPRS attachement.

0(P)	detached
[1]	attached

Notes

•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

<state>=1.

MC55_ATC_V04.00	Page 270 of 475	3/17/06
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