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 />
9.18 <strong>AT</strong>S0 Automatic response to a network request for PDP<br />
context activation<br />
Syntax<br />
Read Command<br />
Response(s)<br />
<strong>AT</strong>S0? <br />
Write Command<br />
<strong>AT</strong>S0=<br />
OK<br />
Response(s)<br />
OK<br />
Reference(s) PIN ASC0<br />
GSM 07.07 ◑ ●<br />
Command <strong>Description</strong><br />
The V.25ter <strong>AT</strong>S0= (Automatic answer) command may be used<br />
to turn off (n=0) and on (n>0) the automatic response to a network<br />
request for a PDP context activation.<br />
When the <strong>AT</strong>S0= ( > 0) command is received, the MT will<br />
attempt to perform a GPRS attach if it is not yet attached and if ME is<br />
configured to do this (see <strong>AT</strong>^SCFG, parameter ). Failure will<br />
result in ERROR being returned to the TE. Subsequently, the MT will<br />
announce a network request for PDP context activation by issuing the<br />
URC RING or CRING to the TE, followed by the intermediate result<br />
code CONNECT. The MT then enters V.25ter online data state and<br />
follows the same procedure as it would after having received a<br />
<strong>AT</strong>+CGANS=1 command with no or values specified.<br />
<strong>AT</strong>SO=O does not perform an automatic GPRS detach.<br />
Parameter <strong>Description</strong><br />
(num)(&W)(&V)<br />
(&F)<br />
000 automatic answering is disabled<br />
001-255 enable automatic answering on the specified ring<br />
number<br />
Notes<br />
• If different settings are used on each interface, and a request for<br />
PDP context activation is received, the interface 'wins' which is<br />
idle and uses the smallest <strong>AT</strong>S0 value.<br />
• If a network request for PDP context activation is answered<br />
automatically and another <strong>AT</strong> command is issued at the same time<br />
on the same interface then this <strong>AT</strong> command will not be 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 />
CS data call, the CONNECT response does not belong to this data<br />
call but to the GPRS. This can be detected if <strong>AT</strong>X is not set to 0. CS<br />
data call will issue CONNECT , GPRS will issue<br />
CONNECT only.<br />
• A network request for PDP context activation has a maximum<br />
duration of approximately 40 seconds (for details see GSM 04.08).<br />
A RING/CRING URC is issued every 5 seconds, so setting<br />
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.<br />
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