Siemens MC35 - Manual (Page 144)

AT Command Set
MC35_ATC_01_V03.02 Page 144 of 228 13.03.2002
6.1.3 AT+CGDATA Enter data state
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)
OK/ERROR/+CME ERROR
Parameter
<L2P> 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
<L2P> layer 2 protocol to be used between the TE and MT
PPP or 1 for layer2 protocol PPP
<cid> 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