Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 297)

GPRS Commands
Network requested PDP context activation
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WM_DEV_OAT_UGD_049 - 001 VOLUME 2 August 23, 2007
14.9 Network requested PDP context activation
In this mode of operation, the MT behaves like an answering modem and accepts the
normal V.25ter commands associated with answering a call. If GPRS-specific
configuration commands are required, they may be sent to the MT as part of the
modem initialization commands.
The +CGAUTO command is used to select modem compatibility mode.
14.9.1 Automatic response to a network request for PDP context
activation 'S0'
The V.25ter "S0" (Automatic answer) command may be used to turn off and on the
automatic response to a network request for a PDP context activation.
When the "ATS0=n" (n>0) command is received, the MT attempts to perform a GPRS
attach if it is not already attached. Failure will result in ERROR being returned to the
TE. Subsequently, the MT will announce a network request for PDP context activation
by issuing the unsolicited result code RING to the TE, followed by the intermediate
result code CONNECT. The MT then enters V.25ter online data state and follows the
same procedure as it would after having received a "AT+CGANS=1" with no
value specified.
Note: The "ATS0=n" (n=0) command does not perform an automatic GPRS detach.
14.9.2 Manual acceptance of a network request for PDP context
activation 'A'
The V.25ter "A" (Answer) command may be used to accept a network request for a
PDP context activation announced by the unsolicited result code RING. The MT
responds with CONNECT, enters V.25ter online data state and follows the same
procedure as it would after having received a "AT+CGANS=1" with no value
specified. It is an error to issue the "A" command when there is no outstanding
network request.
14.9.3 Manual rejection of a network request for PDP context activation
"H"
The V.25ter "H" or "H0" (On-hook) command may be used to reject a network request
for PDP context activation announced by the unsolicited result code RING. The MT
responds with OK.