C55/C55i AT COMMAND SET Description Preliminary - Falcom
C55/C55i AT COMMAND SET Description Preliminary - Falcom
C55/C55i AT COMMAND SET Description Preliminary - Falcom
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<strong>C55</strong>/<strong>C55</strong>I <strong>AT</strong> <strong>COMMAND</strong> <strong>SET</strong> VERSION 1.00<br />
reject the request by issuing the <strong>AT</strong>+CGANS command or may<br />
simply ignore the network request.<br />
• When the <strong>AT</strong>+CGAUTO=1 command is received, the MT will<br />
attempt to perform a GPRS attach if it is not yet attached. Failure<br />
will result in ERROR or, if enabled +CME ERROR being returned<br />
to the TE. Subsequently, the MT announces a network request for<br />
PDP context activation by issuing the URC RING to the TE,<br />
followed by the intermediate result code CONNECT. The MT then<br />
enters V.25ter online data state and follows the same procedure as<br />
it would after having received a +CGANS=1 with no or<br />
values specified.<br />
• If a GPRS attach will be initiated by this command and the MT is<br />
not able to attach for more than 385 seconds (timer T3310<br />
expired), command returns with "ERROR" or "+CME ERROR:<br />
unknown", but MT is still trying to attach and the requested<br />
automatic mode is in use.<br />
• If a network request for PDP context activation is answered<br />
automatically and if another <strong>AT</strong> command is issued at the same<br />
time on the same interface, then this <strong>AT</strong> command is not executed.<br />
Any response belongs to the automatic context activation<br />
procedure. If the <strong>AT</strong> command which caused the collision was a<br />
circuit switched data call, the CONNECT response does not belong<br />
to this data call but to the GPRS. This can be detected if <strong>AT</strong>X is not<br />
set to 0. CS data call will issue CONNECT , GPRS will<br />
issue CONNECT only.<br />
9.5 <strong>AT</strong>+CGD<strong>AT</strong>A Enter data state<br />
Syntax<br />
Test Command<br />
<strong>AT</strong>+CGD<strong>AT</strong>A=?<br />
Write Command<br />
<strong>AT</strong>+CGD<strong>AT</strong>A=[[, [,<br />
[,... ]]]]<br />
Response(s)<br />
+CGD<strong>AT</strong>A: (list of supported s)<br />
OK<br />
Reference(s) PIN ASC0<br />
GSM 07.07 ● ●<br />
Response(s)<br />
CONNECT NO CARRIER ERROR +CME<br />
ERROR<br />
Command <strong>Description</strong><br />
The test command is used for requesting information on the<br />
supported layer 2 protocols to be used between the TE and MT.<br />
The write command causes the MT to perform all actions which are<br />
necessary to establish communication between the TE and the<br />
network using one or more GPRS PDP types. This may include<br />
performing a GPRS attach and one or more PDP context activations.<br />
Commands following the <strong>AT</strong>+CGD<strong>AT</strong>A command in the <strong>AT</strong> command<br />
line will not be processed by the MT.<br />
If no is given or if there is no matching context definition, the<br />
MT will attempt to activate the context with PDP type IP and all other<br />
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.<br />
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