[OpenSIPS-Users] re : Question about B2BUA modules..

[Anca Vamanu]

Hi Jignesh,

I don't think that it should matter if you send reInvite or Invite to UE-B.
I will explain what happens if you use the refer scenario: 
http://www.opensips.org/Resources/B2buaTutorial#toc15. This scenario 
tells the B2BUA to pas through on the other side all requests until it 
receives a Refer message - when this happens, the B2BUA will end the 
dialog with the endpoint that sent the Refer and connect the other party 
with the URI in Refer-To header.
This has nothing to do with the other dialog where A and C are 
connected. That dialog might neither exits - there is no connection 
between the two and you can not put a condition of this kind ( referring 
to another dialog) in the B2BUA scenario.

Regards,
Anca


On 07/09/2010 05:59 PM, jignesh gandhi wrote:
> Hello Anca,
>
>
> Thanks for your quick reply.
> Just wanted to make sure that I understand what you are saying.
>
> Are you saying that B2BUA needs to be in the middle of the UE-A to 
> UE-C and
> UE-C to UE-B calls ?
>
> I am not planning on sending a Re-Invite to UE-B, but a new INVITE 
> w/replaces.
>
> thanks,
> --Jignesh
> ======================
>
> Message: 2
> Date: Fri, 09 Jul 2010 11:15:16 +0300
> From: Anca Vamanu <anca at opensips.org <mailto:anca at opensips.org>>
> Subject: Re: [OpenSIPS-Users] re : Question about B2BUA modules..
> To: users at lists.opensips.org <mailto:users at lists.opensips.org>
> Message-ID: <4C36DA94.5000607 at opensips.org 
> <mailto:4C36DA94.5000607 at opensips.org>>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Jignesh,
>
> This scenario will work with the B2BUA component if you use the refer
> scenario, but you have to put the B2BUA in the middle of the call from
> the beginning (the call where the REFER is received, in your example
> from UE-C to UE-B), it is not possible othervise for it to send a
> reInvite in that dialog if it is not controlling it. The only thing that
> you won't see is the Notify at the end sent to UC-E, now B2BUA does not
> send this.
>
> Regards,
>
> -- 
> Anca Vamanu
> www.voice-system.ro
>
>
>
>
> On 07/08/2010 11:30 PM, jignesh gandhi wrote:
> > Hello Anca,
> >
> > I have read the b2bua tutorial and have opensips 1.62 installed.
> > I am mainly interested in the REFER scenario..
> >
> > Would the current implementation of the b2bua support the following
> > scenario ?
> >
> > UE-A calls UE-C and are in a call. UE-C puts UE-A on hold.
> > UE-C call UE-B and are in a call.  UE-C puts UE-B on hold.
> >
> > OpenSIPs is not in the path of the original calls.
> >
> > Before UE-C bridges UE-A and UE-B,  UE-C wishes to get out the middle
> > of the call.
> > One way would be to send a REFER to UE-B .
> >
> > What if the switch UE-B is connected to does not support REFER ? So I
> > want to do the following..
> >
> > UE-C sends a REFER to SIP-AS ( OPENSIPS ) and upon receipt of the REFER,
> > using the B2BUA , the SIP-AS would send an INVITE w/replaces and no
> > SDP to UE-B
> > Upon receiving the 200 Ok w/SDP. the SIP-AS would send an INVITE to
> > UE-A with the
> > SDP received from UE-B's 200 Ok. Upon receiving an ACK from UE-A ,
> > SIP-AS would
> > send an ACK back to UE-B and an INFO message to UE-C and appropriate 
> BYEs.
> >
> > Below is a simple flow chart...
> >
> >
> > UE-C  REFER------------------> OPENSIPS B2BUA(SIP_AS)
> >          UE-B
> >                                            INVITE w/replaces no
> > SDP---------------------->
> > <------------------------------------------200 OK w/SDP(1)
> >                                            INVITE w/ SDP (1)
> >      UE-A
> >
> >  --------------------------------->
> > <----------------200 OK w/SDP
> >
> >
> > ACK--------------------------------------------------->
> >
> >
> > ACK--------------------------->
> > <-------------------------NOTIFY
> >
> > thanks in advance for your help,
> > --Jignesh
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: 
> http://lists.opensips.org/pipermail/users/attachments/20100709/7df1c308/attachment-0001.htm 
>
>


-- 
Anca Vamanu
www.voice-system.ro

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.opensips.org/pipermail/users/attachments/20100709/bfe5c5d2/attachment-0001.htm