Hi Ranjit, Thanks for the quick reply. My code has a default of g.729b as per rfc 3555. But, many phones are sending codec "18" with out any annexb param in "a=" line, so we are rejecting the call as we are not supporting g.729b. Is this correct behaviour?
Regards, Aswin Bhupalam. ----- Original Message ----- From: "Avasarala Ranjit-A20990" <[EMAIL PROTECTED]> To: "Aswin Bhupalam" <[EMAIL PROTECTED]>; <[email protected]> Cc: "Sushil \(E-mail\)" <[EMAIL PROTECTED]>; "Uttam Kumar Sarkar" <[EMAIL PROTECTED]> Sent: Tuesday, July 19, 2005 11:52 AM Subject: RE: [Sip-implementors] G 729 a & b negotiation > Hi > Parameter annexb=yes|no as defined in RFC 3555 can be used to indicate > if the codec supported is G.729a and G.729b > > So the complete SDP should be > > v=0 > o=root 743184990 743184990 IN IP4 10.50.10.146 s=call c=IN IP4 > 10.50.10.146 t=0 0 m=audio 10014 RTP/AVP 18 101 > a=rtpmap:18 g729/8000 > a=fmtp:18 annexb=yes > a=rtpmap:101 telephone-event/8000 > a=fmtp:101 0-15 > a=ptime:20 > a=sendrecv > > Regards > Ranjit > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Aswin > Bhupalam > Sent: Tuesday, July 19, 2005 10:47 AM > To: [email protected] > Cc: Sushil \(E-mail\); Uttam Kumar Sarkar > Subject: [Sip-implementors] G 729 a & b negotiation > > All, > say "a=" line is not having 'annexb' parameter, which one(g729a or g729b) > should we take as default. > > Snom phone sends an INVITE with the following SDP: > > v=0 > o=root 743184990 743184990 IN IP4 10.50.10.146 s=call c=IN IP4 > 10.50.10.146 t=0 0 m=audio 10014 RTP/AVP 18 101 > a=rtpmap:18 g729/8000 > a=rtpmap:101 telephone-event/8000 > a=fmtp:101 0-15 > a=ptime:20 > a=sendrecv > > Which codec is being negotiated here?(g729a or g729b) > > Dave, > I found your mail regarding the same question. > kindly let me know if you've found something useful. > > Regards, > Aswin Bhupalam. > > -----Messaggio originale----- > Da: sip-implementors-bounces at cs.columbia.edu > [mailto:sip-implementors-bounces at cs.columbia.edu] Per conto di David > Stuart > Inviato: giovedì 8 luglio 2004 20.10 > A: sip-implementors at cs.columbia.edu > Oggetto: [Sip-implementors] g729 annex B negotiation > > Hi All, > > What is the correct way to negotiate annex B when using g.729 (as opposed to > A)? They both use the same payload type, 18. > > I see two different mentions of this, RFC 3555 section 4.1.9, and RFC > 3108 sec 5.6.3.2 but they seem to be saying different things. > > Can anyone point me to the correct example as to how to achieve this? > > -- > David Stuart, SIPquest > Email: dave (at) sipquest (dot) com > Phone: 254-8886 x234 Web: http://www.sipquest.com/ > Address: 106 - 350 Terry Fox Drive, Kanata Ontario, K2K 2P5 > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
