Siemens AT Command Set Cellular Engines Wireless Modules MC35 ユーザーズマニュアル

MC35_ATC_01_V04.00

Page 151 of 238

02.04.2002

Test command

AT+CGDATA=?

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

Response

CGDATA: (list of supported <L2P>s)

Parameter

See write command

Write command

+CGDATA=[<L2P>,
[<cid>[,<cid>,…]]]]

The execution command causes the MT to perform whatever actions are nec-
essary 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 +CGDATA com-
mand in the AT command line shall not be processed by the MT.

Parameter

layer 2 protocol to be used between the TE and MT
PPP or 1 for layer2 protocol PPP

PDP Context Identifier is a numeric parameter which
specifies a particular PDP context definition. The pa-
rameter is local to the TE-MT interface and is used in
PDP context-related commands. If no context is specified,
an internal context 0 with default QoS (network sub-
scribed) and APN from EEPROM (if there is one) is used.
1
2

Response

If successful, the MT issues the intermediate result code CONNECT and en-
ters V.25ter online data state:
CONNECT

After data transfer is complete, and the layer 2 protocol termination procedure
has completed successfully, the command state is re-entered and the MT re-
turns the final result code
OK

If the <L2P> parameter value is unacceptable to the MT, the MT returns an
ERROR or +CME ERROR response:
ERROR/+CME ERROR

In the event of erroneous termination or a failure to start up, the command
state is re-entered and the MT returns
NO CARRIER
or, if enabled,
+CME ERROR