> how a state-full proxy/SBC should react, who is receiving the m= line having > no fmt values like, In General Proxies are not expected to look into the payload/SDP, they will relay it to the other party. SBC's(B2B) need to look into the SDP and in this case it will send 400 as the SDP is malformed.
-----Original Message----- From: Aman [mailto:[email protected]] Sent: Monday, May 20, 2013 3:38 AM To: sip-implementors Subject: [Sip-implementors] FMT are mandatory in the Media Descriptions ("m=") line Hi All, Looking for the views on, if the media format description <fmt> are mandatory to mention in the media descriptions (m=) line of SDPs. RFC4566 section 8.2.3 says, ... RTP payload formats under the "RTP/AVP" and "RTP/SAVP" profiles MUST use the payload type number as their "fmt" value. ... how a state-full proxy/SBC should react, who is receiving the m= line having no fmt values like, |v=0 |o=ABC-SIP 2000 1000 IN IP4 192.168.180.10 s=SIP Call c=IN IP4 |192.168.180.10 |t=0 0 |m=audio 25218 RTP/AVP |a=sendrecv |a=rtpmap:0 PCMU/8000 |a=ptime:20 Cheers, Aman _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
