Chaitali,
If support for it has been indicated in the signalling from the
UAS (UPDATE listed in the Allow header), the UAC can change the SDP by
sending an UPDATE request (RFC3311), in early or comfirmed dialog - as in
your example below. Or complete the initial INVITE request and then
re-INVITE the UAS with the desired SDP.
Regards - Wayne D.
**********************************************************
Chaitali asked ->
Hi All,
I need some clarifications regd Offer Answer Model.User A sends Invite to
UserB with RTP as transport and B accepts the call with 200
User A SDP:
v=0
o=alice 2890844526 2890844526 IN IP4 host.atlanta.example.com
s=
c=IN IP4 host.atlanta.example.com
t=0 0
m=audio 49170 RTP/AVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
and B replies with
v=0
o=bob 2808844564 2808844564 IN IP4 host.biloxi.example.com
s=
c=IN IP4 host.biloxi.example.com
t=0 0
m=audio 49172 RTP/AVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
Can B Send an Updated Offer changing the Transport Is this valid ?
v=0
o=bob 2808844564 2808844565 IN IP4 host.biloxi.example.com
s=
c=IN IP4 host.biloxi.example.com
t=0 0
m=audio 49172 RTP/SAVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
Thanks,
Chaitali
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