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101

MC55 AT Command Set

10.5 AT+CGDATA

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MC55_ATC_V01.05 Page 251 of 469 2/10/04

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10.5 AT+CGDATA Enter data state

Syntax

Command Description

The test command is used for requesting information on the supported layer 2 protocols to be used between the

TE and MT.

The write command causes the MT to perform all actions which are necessary to establish communication

between the TE and the network using one or more GPRS PDP types. This may include performing a GPRS

attach and one or more PDP context activations. Commands following the

AT+CGDATA command in the AT com-

mand line will not be processed by the MT.

If no

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

PDP type IP and all other context parameters set to their default values (see

AT+CGDCONT, AT+CGQREQ,

AT+CGQMIN).

If the

<L2P> parameter is omitted, the layer 2 protocol is unspecified and PPP will be used.

If the write command is successful, the MT issues the intermediate result code CONNECT and enters V.25ter

online data state.

After data transfer is complete, and the layer 2 protocol termination procedure has completed successfully, the

command state is reentered and the MT returns the final result code OK.

If the

<L2P> parameter value is unacceptable to the MT, the MT returns ERROR or +CME ERROR.

In the event of erroneous termination or a failure to start up, the command state is reentered and the MT returns

NO CARRIER, or if enabled +CME ERROR.

Test Command

AT+CGDATA=?

Response(s)

+CGDATA: (list of supported <L2P>s)

Write Command

AT+CGDATA=[<L2P>[, <cid>[, <cid>[,... ]]]]

Response(s)

CONNECT

NO CARRIER

ERROR

+CME ERROR

PIN ASC0 ASC1 MUX1 MUX2 MUX3

% % % % % %

Reference(s)

GSM 07.07

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Siemens MC55 Manuel d'utilisateur Page 251

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