An OPTIONS query is the best way to find out the media capabilities of the endpoint. The format of an appropriate SDP message body for an OPTIONS response is defined in RFC 3264.
Thanks,
Alan Johnston
WorldCom
sip:[EMAIL PROTECTED]
At 02:40 PM 1/23/2003 +0530, Prasanna Venkatesh wrote:
Hi Jade, This should be taken care by the offer - answer model. The error code for INVITE is 488. There can be a body in the 488 mentioning the media capabilities supported. But there are issues as the 488 is hop-by-hop it can be dropped. I am also not sure how to just denote the capabilities in the SDP.Regards, Prasanna -----Original Message----- From: Jade Chen Yan [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 23, 2003 2:23 PM To: 'Prasanna Venkatesh' Subject: RE: [Sip-implementors] accept header thank u for your reply. But if the one UA cannot accept the media type eg , G.729 , it support the G.711 & g.723, how can the UA tell the other party,?which header should be used? the UA generate a 481 responsed which contains the sdp body? regards, Jade -----Original Message----- From: Prasanna Venkatesh [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 23, 2003 4:43 PM To: jade(3???) Subject: RE: [Sip-implementors] accept header Accept is for the SIP bodies and not the media which is defined by the bodies. An example is Accept: application/sdp, text/*, image/gif The media codecs(g.729 / g.723 etc.) are defined by the sdp body. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jade Chen Yan Sent: Thursday, January 23, 2003 1:45 PM To: Sip-Implementors (E-mail) Subject: [Sip-implementors] accept header hi, list, Can any one give me an example for the accept header?eg, the ua accept the g.723, g.729 & h.263 codec. thanks. Best Regards, Jade _______________________________________________ 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
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