Siemens MC55 - page 244

MC55 AT Command Set

10.1 AT+CGACT s

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MC55_ATC_V01.05 Page 244 of 469 2/10/04

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The write command is used to activate or deactivate the specif ied PDP context(s). After the command has com-

pleted, the MT remains in V.25ter command state. If any PDP context is already in the requested state, the stat e

for that context remains unchanged. If the MT is not GPRS attached when the activation form of the comman d

is executed, the MT first performs a GPRS attach and them attempts to activate the specified contexts . If no

<cid>s are specified the activation/deactivation form of the command activa tes/deactivates all defined contexts.

If the MT is not able to activate a context because of a failed attach, command returns with "ERROR" or with

"+CME ERROR: unknown" after 385 seconds (timer T3310 expired).

If the MT is attached but is not able to activate a context for more than 160 seconds ( timer T3380 expired), com-

mand returns with "ERROR" or with "+CME ERROR: unspecified GPRS error. In this case AT+CEER returns

"+CEER: 51,3,0".

Parameter Description

Indicates the state of PDP context activation.

0 detached

[1] attached

PDP Context Identifier is a numeric parameter which specifies a particular PDP context definition. The param-

eter is local to the TE-MT interface and is used in other PDP context-re lated commands.

1...2

Notes

•ATH will deactivate any PDP context.

• If the MT is in dedicated mode, write command returns with "+CME ERROR: operatio n temporary not

allowed".

• A maximum of 2 contexts can be activated at the same time, no matter on which interface. Trying to activate

more than 2 contexts will cause "+CME ERROR: operation temporary not al lowed". Note that, depending on

the provider, the number of activated contexts may be further restricted. In such cases "+CME ERROR:

unspecified GPRS error" will be returned and AT+CEER returns "+CEER: 50,26,0".

Remember that contexts may be activated implicitly by using the ATD*98# or ATD*99# GPRS compatibility

commands without specifying a <cid>.

<state>(num)

<cid>(num)