I believe you can't avoid several streams if you want to fork the call, as well as to have early media sessions, unless UAC makes some policy decisions locally on playing the media streams.
see some more discussion: http://www1.ietf.org/mail-archive/web/sipping/current/msg04282.html -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Andreas Bystr�m Sent: Thursday, August 26, 2004 10:57 AM To: 'Sip-Implementors (E-mail)' Subject: [Sip-implementors] Playing ringback tone to the caller Any suggestions of how to solve personal ringback tone? I want to be able to play media to the caller instead of having the caller generate its own ringback tone. If I have a media server that can play music, and is triggered by the application server, is the simplest (and most "correct") way just to start send to the ip stated in the INVITE? What happens if there are forking, I guess the risk is that it can be several streams sent to the caller? If the offered codecs from the caller cant match the codecs in the invite, is there a way to negotiate this without sending 200 OK? I have tried to find some call flows describing this case, but hae failed. Does anyone know of where I can find call flows describing personal ringback tone? Regards, Andreas _______________________________________________ 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
