Obile – Siemens MC55 User Manual

Page 246

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MC55 AT Command Set

10.2 AT+CGANS

s

m

obile

MC55_ATC_V01.05

Page 246 of 469

2/10/04

Confidential / Released

Note

• If

<response>

is 1, the following procedure is followed by the MT:

If the

<L2P>

parameter value is unacceptable to the MT, the MT will return an ERROR or +CME ERROR

response. Otherwise, the MT issues the intermediate result code CONNECT and enters V.25ter online data
state.
A

<cid>

may be specified for use in the context activation request.

During the PDP startup procedure the MT has the PDP type and the PDP address provided by the network
in the Request PDP context activation message. If this is in conflict with the information provided by a spec-
ified

<cid>

, the command will fail. There will be no conflict, if the PDP type matches exactly and the PDP

address given by the context definition for

<cid>

is empty or matches exactly with the address specified with

the network PDP context activation message.
The context will be activated using the values for PDP type and address provided by the network, together
with all other information found in the PDP context definition. An APN may or may not be required, depending
on the application.
If no

<cid>

is given or if there is no matching context definition, the MT will attempt to activate the context

using the values for PDP type and address provided by the network. The other parameters will be set to their
default values (see

AT+CGDCONT

).

If activation is successful, data transfer may proceed.
After data transfer is complete, and the layer 2 protocol termination procedure has completed successfully,
the V.25ter command state is reentered and the MT returns the final result code OK.
In the event of an erroneous termination or a failure to start up, the V.25ter command state is re-entered and
the MT returns the final result code NO CARRIER, or if enabled, +CME ERROR. Attach, activate and other
errors may be reported. It isalso an error to issue the

AT+CGANS

command when there is no pending network

request.
The command may be used in both normal and modem compatibility modes.

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