Westermo GDW-11 - Manual (Page 234)

234 GPRS commands 6615-2220
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.
Automatic response to a network request for PDP context activation 'S0'
The V.25ter 'S0=n' (Automatic answer) command may be used to turn off (n=0) and on
(n>0) the automatic response to a network request for a PDP context activation.
When the 'S0=n' (n>0) command is received, the MT attempt 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 +CGANS=1 with no <L2P> or <cid> val-
ues specified.
NOTE:
The 'S0=n' (n=0) command does not perform an automatic GPRS detach.
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 +CGANS=1 with no <cid> value specified. It is an error to
issue the 'A' command when there is no outstanding network request.
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. It is an error to issue the 'H' command when there is no outstanding
network request.
NOTE:
This is an extension to the usage of the 'H' command that is described in ITU-T V.25ter.