El Tuesday 10 July 2007 20:03:53 Christian Schlatter escribió: > Iñaki Baz Castillo wrote: > > Hi, I'm starting using OpenSer with Asterisk. > > > > In calls passing through Asterisk the caller or callee get music on hold > > of Asterisk when is put on hold. But of course, direct calls between > > OpenSer users don't get this music. > > > > I'm thinking in the posibility of detecting "on hold" reinvites (maybe > > reading the "a=sendonly" of SDP body) and rewriting the SDP IP contact to > > a music on hold server. > > You would also have to tell the music server where to send the rtp > stream. And you'd have to keep dialog state on the proxy in order to > capture the off-hold INVITE and tell the music server to stop sending > media. > > This all leads to a sip proxy acting as a B2BUA/3PCC server which needs > a lot of resources and is difficult to implement. I don't say it is > impossible but adding this functionality to openser would be quite a task. > > Unfortunately even the IETF has no clear message on music on hold, no > wonder sip phones normally do not support it in a standards compliant > way. There is a draft called "SIP Service Examples" that already has 12 > revisions and that includes an example on how music on hold should be > implemented. > > http://www1.tools.ietf.org/html/draft-ietf-sipping-service-examples-12#sect >ion-2.3 > > Previous revisions of this draft followed a 3PCC model for music on hold > (http://tech-invite.com/Ti-sip-service-3.html), whereas revision 12 now > implements music on hold with a call transfer. > > One can only hope that we will see products implementing these procedures. > > Pingtel seems to offer a music-on-hold server for the 3PCC model: > http://interop.pingtel.com/#moh > > And SNOM phones seem to work fine together with the pingtel/sipX > solution: > http://sipx-wiki.calivia.com/index.php/HowTo_configure_SNOM_SIP_phone_with_ >sipX#Music_On_Hold_.28MoH.29
Thanks a lot. I see that it's not an easy task. I'll try it whena have some tiem and if I get something decent I''ll tell it here. Regards. -- Iñaki Baz Castillo [EMAIL PROTECTED] _______________________________________________ Users mailing list [email protected] http://openser.org/cgi-bin/mailman/listinfo/users
