[SIPForum-discussion] SDP in 180 Ringing & 200 OK

[hari prasad]

Hello All,
I have a basic doubt regarding the SDP  Answer, in a Offer/Answer model.
Can there be a ANSWER in both 180 and 200 OK?
If so, is that mandatory to have the same SDP in both the response?

I have the following two Answers in one of my scenario:

*180 Ringing:*
v=0
o=- 3654100372 1235990184 IN IP4 *192.168.13.13*
s=SDP Data
c=IN IP4 *192.168.13.13*
t=0 0
m=audio *46608* RTP/AVP 18 8 96
a=rtpmap:96 telephone-event/8000
a=ptime:20
a=sqn:0
a=cdsc:1 image udptl t38
a=cpar:a=T38FaxVersion:0
a=cpar:a=T38MaxBitRate:14400
a=cpar:a=T38FaxRateManagement:transferredTCF
a=cpar:a=T38FaxMaxBuffer:336
a=cpar:a=T38FaxMaxDatagram:176
a=cpar:a=T38FaxUdpEC:t38UDPRedundancy

*200 OK:*

v=0
o=- 3805400806 1235990190 IN IP4 *192.168.13.25*
s=SDP Data
c=IN IP4 *192.168.13.25*
t=0 0
m=audio *52138* RTP/AVP 18 8 96
a=rtpmap:96 telephone-event/8000
a=ptime:20
a=sqn:0
a=cdsc:1 image udptl t38
a=cpar:a=T38FaxVersion:0
a=cpar:a=T38MaxBitRate:14400
a=cpar:a=T38FaxRateManagement:transferredTCF
a=cpar:a=T38FaxMaxBuffer:336
a=cpar:a=T38FaxMaxDatagram:176
a=cpar:a=T38FaxUdpEC:t38UDPRedundancy

Here the *Owner*, *Connection* and *Audio Port* were all different.
Is this RFC complaint?
Should the UAC consider only the SDP in 200 OK?

Thanks in Advance.
Kind Regards,
Hari Prasad V
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20090520/9347fec9/attachment-0002.html>