[SIPForum-discussion] How does the SDP offer and answer works

[arun kumar]

Hi can any one can guide me in this


       A---------INVITE/SDP----------> B

      The SDP offer  has the following
                m= audio 49170 RTP/ AVP 0 8
             a= rtpmap: 0 PCMU/8000
             a= rtpmap: 8 PCMA/8000
             m= video 49172 RTP/AVP 32
             a= rtpmap: 32 MPV/90000

    A<-----------200OK-------B

                B also supports all the media and codec types provided in
the SDP offer of A

So what will be the SDP answer of B, will it send all the medai and codec
supported by itself ?

my question is who will select the media & codec for the Media session
establishment between  A & B, if more than  1 suitable codec matches between
the endpoints which codec is selected and on what basis is it done.






v = 0





-- 
With Regards
Arun Kumar .P
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