Siemens AC75 User Manual
Page 314
AC75 AT Command Set
11.4 AT+CGAUTO
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AC75_ATC_V01.002
Page 314 of 569
10/30/06
Confidential / Released
• When the
=1 command is received, the MT will attempt to perform a GPRS attach if it is not yet
attached. Failure will result in ERROR or, if enabled +CME ERROR being returned to the TE. Subsequently,
the MT announces a network request for PDP context activation by issuing the URC RING to the TE, followed
by the intermediate result code CONNECT. The MT then enters V.250 online data state and follows the same
procedure as it would after having received a +CGANS=1 with no
values specified.
• If a GPRS attach will be initiated by this command and the MT is not able to attach for more than 385 seconds
(timer T3310 expired), command returns with "ERROR" or "+CME ERROR: unknown", but MT is still trying
to attach and the requested automatic mode
is in use.
• If a network request for PDP context activation is answered automatically and if another AT command is
issued at the same time on the same interface, then this AT command is not executed. Any response belongs
to the automatic context activation procedure. If the AT command which caused the collision was a circuit
switched data call, the CONNECT response does not belong to this data call but to the GPRS. This can be
detected if
is not set to 0. CS data call will issue CONNECT <text>, GPRS will issue CONNECT only.