Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
12
9
Release 6
When the +CGAUTO=1 command is received, the MT shall attempt to perform a PS attach if it is not already attached.
Failure will result in ERROR or, if enabled, +CME ERROR being returned to the TE. Subsequently, when the MT
announces a network request for PDP context activation by issuing the unsolicited result code RING or +CRING to the
TE, this is 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 <L2P> or <cid> values specified.
Defined values
<n>:
0 turn off automatic response for Packet Domain only
1 turn on automatic response for Packet Domain only
2 modem compatibility mode, Packet Domain only
3 modem compatibility mode, Packet Domain and circuit switched calls (default)
For <n> = 0 Packet DomainS network requests are manually accepted or rejected by the +CGANS command.
For <n> = 1 Packet Domain network requests are automatically accepted according to the description above.
For <n> = 2, automatic acceptance of Packet Domain network requests is controlled by the 'S0' command. Manual
control uses the 'A' and 'H' commands, respectively, to accept and reject Packet Domain requests. (+CGANS may also
be used.) Incoming circuit switched calls can be neither manually nor automatically answered.
For <n> = 3, automatic acceptance of both Packet Domain network requests and incoming circuit switched calls is
controlled by the 'S0' command. Manual control uses the 'A' and 'H' commands, respectively, to accept and reject Packet
Domain requests. (+CGANS may also be used.) Circuit switched calls are handled as described elsewhere in this
specification.
Implementation
Optional. If not implemented, the MT shall behave according to the case of <n> = 3.
10.1.16 Manual response to a network request for PDP context activation
+CGANS
Table 118: CGANS action command syntax
Command
Possible response(s)
+CGANS=[<response>,
[<L2P> ,[<cid>]]]
OK
ERROR
+CGANS=?
+CGANS: (list of supported
<response>s), (list of supported
<L2P>s)
Description
The execution command requests the MT to respond to a network request for Packet Domain PDP context activation
which has been signalled to the TE by the RING or +CRING: unsolicited result code. The <response> parameter
allows the TE to accept or reject the request.
If <response> is 0, the request is rejected and the MT returns OK to the TE.
If <response> is 1, the following procedure is followed by the MT.
Commands following the +CGANS command in the AT command line shall not be processed by the MT.
If the <L2P> parameter value is unacceptable to the MT, the MT shall return an ERROR or +CME ERROR response.
Otherwise, the MT issues the intermediate result code CONNECT and enters V.250 online data state.
The detailed behaviour after the online data state has been entered is dependent on the PDP type. It is described briefly
in 3GPP TS 27.060[34] and in more detail in 3GPP TS 29.061[39] and the specifications for the relevant PDPs. PDP
context activation procedures shall take place prior to or during the PDP startup.
One or more <cid>s may be specified in order to provide the values needed for the context activation request.