That's right. -----Original Message----- From: Bob Penfield [mailto:bpenfi...@acmepacket.com] Sent: Monday, November 29, 2010 10:24 AM To: Uttam Sarkar (usarkar); varun; sip-implementors@lists.cs.columbia.edu Subject: RE: [Sip-implementors] dynamic payload negotiation
You have it backwards. SDP describes what a User Agent is prepared to received. Therefore, when A offers 96 for DTMF, B must send DTMF using payload 96. When B answers with 101 for DTMF, A must send DTMF using payload 101. -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Uttam Sarkar (usarkar) Sent: Monday, November 29, 2010 9:57 AM To: varun; sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] dynamic payload negotiation Correction.. -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Uttam Sarkar (usarkar) Sent: Monday, November 29, 2010 9:54 AM To: varun; sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] dynamic payload negotiation Please see inline. -----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 5:31 AM 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). [Uttam] A must send DTMF with payload type 96 and must recognize received payload type 101 as DTMF. Similarly, B must send DTMF with payload type 101 and must recognize received payload type 96 as DTMF. 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. [Uttam] As per as I know static payload type must be less than 96. 96 and more would be a dynamic payload. Regards Varun _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
