Re: [Sip-implementors] Even Port number for RTP in SDP

2014-01-10 Thread Paul Kyzivat
NK, By default RTP goes on an even port and RTCP goes on the following odd port. IIRC (I'm not looking this up) if the declared port is odd you are still supposed to round it down to the previous even one for the RTP and use the odd one for the RTCP. But then look at RFC 3605. It defines a=rtc

Re: [Sip-implementors] offer answer model

2014-01-10 Thread Paul Kyzivat
On 1/10/14 3:40 AM, Praveena Ss wrote: > Hi Isshed, > > in your example, second offer from A is correct as long as session version > id is changed in same session. I disagree. The operable issue is in section 8 of 3264: If an SDP is offered, which is different from the previous SDP, the n

[Sip-implementors] Even Port number for RTP in SDP

2014-01-10 Thread NK
Dear All, Can you please help me on one issue, where one of client is complaining that they need RTP even port in SDP not the ODD. Which is Fax Call. Although I checked the RFC 2327 & 4566 for SDP. In RFC 2327 its clearly mentioned that we should use even port for RTP compliance, whereas in RFC

Re: [Sip-implementors] offer answer model

2014-01-10 Thread Praveena Ss
Hi Isshed, in your example, second offer from A is correct as long as session version id is changed in same session. w.r.t m= line, the second answer sent from B is wrong because it does not contain the same number of m= lines as in second offer from A. Hope this helps to you. snippet from RFC 3