Hi,

Asymmetric payload is allowed in sip.
As SDP is receive capability hence:
A-> B (RFC2833 Payload :101)
B-> A (RFC2833 Payload :96)

Also based on what is negotiated the streaming will be using that
payload.

Regards
Sunil Verma


-----Original Message-----
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of
varun
Sent: Monday, November 29, 2010 4:01 PM
To: sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] dynamic payload negotiation

Hi,
I have a question about dynamic payload type negotiation.

Lets say A is the offerer:

m=audio 5006 RTP/AVP 8 96
a=rtpmap:8 PCMA/8000
a=rtpmap:96 telephone-event/8000

Lets say B is the amswerer

m=audio 1046 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000

What RTP payload type should be send from A to B and vice-versa for DTMF
relay( A has specified 96 and B 101).

Also I believe that even static paylaod types can be used as dynamic
ones.
So lets say party A sends G711 a-law with payload type 0 but party B
sends G711 a-law with dynamic payload 100 so what should happen in this
case.

Regards
Varun





      
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