The acronyms you are using are a bit obscure. What is a SS ? Most ITSPs do not handle REFER. The bridging component has to convert the REFER to an INVITE to the target of the REFER ( i.e. it has to short circuit the REFER ). If you are interested in the gory details and a working example of all of this, checkout the sipXbridge component from the SIPX project ( http://www.sipfoundry.org ). In it you will find a design document that explains the gory details.
Ranga On Wed, Jul 1, 2009 at 9:39 AM, Manoj Priyankara [TG]<mano...@suntel.lk> wrote: > Thanks Vipul, > > In this case the UACs are defined in the IP-PBX and registered in the > IP-PBX. > > When a UAC of the IP-PBX sends REFER message to transfer a call to the > SS through the SIP trunk SS sends 403 Forbidden to the REFER message. > > Of course the SS can act as a B2BUA, but is it possible connect the call > legs from the SS and release the IP-PBX from the picture? > > Thanks for the expert support > BR, > Manoj > > > -----Original Message----- > From: Rastogi, Vipul (Vipul) [mailto:vrast...@avaya.com] > Sent: Wednesday, July 01, 2009 2:45 PM > To: Manoj Priyankara [TG]; Paul Kyzivat > Cc: sip-implementors@lists.cs.columbia.edu > Subject: RE: [Sip-implementors] Call Transfer through a SIP trunk > > > If SS is acting as proxy then it can't handle media part. I would expect > SS also to be b2bua, in which case IP-PBX should exit from media path. > But as Paul said nothing is defined. > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of > Manoj Priyankara [TG] > Sent: Wednesday, July 01, 2009 8:40 AM > To: Paul Kyzivat > Cc: sip-implementors@lists.cs.columbia.edu > Subject: Re: [Sip-implementors] Call Transfer through a SIP trunk > > Hi Paul, > > Sorry for using more generic terms. In this case the IP-PBX acts as a > B2BUA and the SS acts as a Proxy > > BR, > Manoj > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of > Paul Kyzivat > Sent: Tuesday, June 30, 2009 6:50 PM > To: Manoj Priyankara [TG] > Cc: sip-implementors@lists.cs.columbia.edu > Subject: Re: [Sip-implementors] Call Transfer through a SIP trunk > > Manoj, > > Virtually none of the terms you use below have well defined meanings in > sip standards. Many people use such terms, but AFAIK there are not well > understood and consistent implementations for them. So it is not > possible to answer your question as posed. > > Tell us whether your SS and IP-PBX are proxies, or B2BUAs. And if > B2BUAs, do they terminate media or not. > > Then it may be possible to give you an answer. > > Thanks, > Paul > > Manoj Priyankara [TG] wrote: >> Dear all, >> >> Please consider the following scenario. >> >> Assume that there is a standard Soft Switch; and an IP PBX is > connected >> to the SS using a SIP trunk. >> >> IP PBX has a user (Say A) >> >> An incoming call comes from an external party through the SS to user > A. >> User A transfers that call to an external party. (Say B). This call > leg >> also goes through the SS >> >> >> Incoming call to A >> >> SIP Trunk >> C-----> |SS|-------->|IP-PBX|------> A >> >> >> Transfer to B >> >> A---->|IP PBX|------->|SS|-------> B >> >> In this scenario, can the media be bridged from the SS and release all > >> the resources in the IP PBX once the call is transferred? >> >> Thanks >> BR, >> Manoj >> >> _______________________________________________ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- M. Ranganathan _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
