Although I do not believe it is technically a violation of the RFC, it is not recommended best practice, and would be a rare implementation. The most common way to support ringback (early media) is with a 183 w/SDP session progress.
For a little more information: http://wiki.freeswitch.org/wiki/180_vs._183_vs._Early_Media Of course some googling will give you tons more opinions about ring back and early media. -dg On Tue, Feb 12, 2013 at 10:04 AM, Dani Popa <dani.p...@gmail.com> wrote: > Hi, > > I wondering if it posiible to add sdp on 180 ringing in order to play some > ringing tone. The ideea si that i want to play from rtpproxy with > rtpproxy_stream2uac/rtpproxy_stream2uas some music as ringback tone to > calling party if it's online. > > -- > Dani Popa > > _______________________________________________ > Users mailing list > Users@lists.opensips.org > http://lists.opensips.org/cgi-bin/mailman/listinfo/users > >
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