Hi, For this Asterisk or SEMS won't work ,
So, it can Work on sip Application Server, with Cantata Media Service or Dialog Media Server
Thanks &Regards Ravi Prakash Sunkara VoIP Architect & JAVA-SIP Developer +91-9999882776
2009/2/4 Iñaki Baz Castillo ibc@aliax.net
2009/2/4 Padmaja R urvthme@gmail.com:
Say A and B are in a SIP call, and A and B suddenly decide to have a conference with C. A puts B on hold and dials C' s number. After call between A and C is up, if A presses hook flash, this sends an invite to
the
conference application namely: conf@openseratlocalhost:5060 (which is
the ip
and port number at which my openser proxy would be listening). The
server
should then send back 200 Ok with the contact header containing the
isfocus"
parameter of the form -Contact: sip:conference1@mediaproxyip;isfocus
The
isfocus is an RFC 4579 based feature. The 200 Ok responses to other
invites
(normal calls that do not create conference) should not include this
isfocus
in the contact header of 200 Ok.
Finally, the openser proxy should be able to contact the media proxy on receiving an invite to create the conference and send that ip and focus information in the 200 Ok. The UA -A would then send a REFER to B and C
to
refer to the media server and they disconnect with A. Then all three UAs would individually send invite to the uri returned in the contact header
and
join the conference.
That is not a proxy task, but a SIP application server (probably a B2BUA) even if it just handles signalling.
-- Iñaki Baz Castillo ibc@aliax.net
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