[Kamailio-Users] Reg. SIP conferencing support for RFC 4579

[LetMeKnow]

Hello Padmaja garu,
Your saying about the 3-ways Conference, which built-in UA devices,



Thanks &Regards
Ravi Prakash Sunkara
VoIP Architect & JAVA-SIP Developer
+91-9999882776


2009/2/4 Padmaja R <urvthme at gmail.com>

> Hi all,
>
> Is it possible to use Openser as the SIP conference server? I understand
> that Openser cannot do the media mixing required of a centralized media
> server but if it can do the centralized signaling by acting as a focus and
> let a media proxy do the media mixing, that would be good. I need ad hoc
> conferencing capability. Is there any media proxy that can achieve this
> together with openser?
>
> My scenario is as follows:-
>
> 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 at 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 at 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.
>
> Thanks,
> Padmaja
>
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