Nokia N80 PoC client register ?

[gcoolman_eric]

hi all ...
i study and wanna to develop PoC server..so ... i capture PoC client REGISTER pocket from nokia n80 that contain ' extra SDP payloads ' . I have trying to find OMA, RFC, 3GPP, IMS spec, ...nothing ....They are not described that REGISTER message should contain ' extra SDP ' payloads . Some of the extra header are

m =audio 4 9154 RTP/AVP
a = maxptime:180
a = ptime:180
...
a = poc-version:2
a = poc-dndmodeff
..

does nokia PoC standard really follow OMA PTT ?
cos i checked the message that is different from OMA ..

can someone give me any solution to prove that nokia PoC Register message that could contain SDP payloads ?

Best regards
Tyric

[petrib]

The Nokia PoC predates the OMA PTT so it is slightly different (I'm not sure when there'll be a version of Nokia PoC = OMA).

[gcoolman_eric]

The Nokia PoC predates the OMA PTT so it is slightly different
(I'm not sure when there'll be a version of Nokia PoC = OMA).

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what's the purpose of PoC register message that contain SDP payloads ?

[gcoolman_eric]

Nokia PoC client register message contain SDP ...
cos it describes about PoC media feature and some nokia private tag ..
so ..just respond SDP back to UE ...
PoC client will register successful ...

i use nokia PoC client version 1.0 ..register successful ...

but PoC client 2.0 is different .. cos it contain presence = yes tag ..
i guess it shall respond some special information about presence to UE