> -----Original Message----- > From: M. Ranganathan [mailto:[email protected]] > Sent: Monday, June 15, 2009 3:49 PM > To: Joly, Robert (CAR:9D30) > Cc: sipx-dev > Subject: Re: [sipX-dev] Relay free sipxbridge operation for federation > > On Mon, Jun 15, 2009 at 3:31 PM, Robert Joly<[email protected]> wrote: > >> Hello all! > >> > >> There was a thread some time ago about relay free sipxbridge > >> operation and recently there has been a thread on sipx > federation. I > >> wonder what you feel about the following. > >> > >> Say you wanted to tie system A and System B together. System A is > >> the "server" in this case and is providing NAT compensation to its > >> remote workers. System B can be configured using > sipxbridge to look > >> like a remote worker to system A. > >> > >> Clearly we don't need two media relays between the systems. > >> If we can support an option to suppress relaying of media, then > >> system B looks like a remote worker to system A. > >> > >> When a request originates from System B bound for system A via > >> sipxbridge, its contact and Via would get re-written but > sipxbridge > >> would leave the SDP alone. > >> sipxbridge on system B can forward REFER after appropriate > >> re-writing of the request as it is aware that is talking > to another > >> sipx system that is capable of handling that REFER. > >> > >> It seems to me that this should be relatively easy to support in > >> sipxbridge. Will this scheme work in principle, as a possible > >> solution for federating systems? If not, what is wrong with this? > > > > I'm a bit confused by the description and I'm not sure why > you would > > want to use sipXbridge to connect two sipXecs systems in the first > > place? We recommend to do this with site-to-site dialplans and the > > existing remote-worker solution has mechanisms in place to > avoid doing > > the double-relaying. What real-world problem are we trying solve? > > It is quite possible that a mechanism already exists and that > I just do not understand it so please help me understand : > > When a remote worker phone registered at site A wants to do a > call to a phone registered as a remote worker on Site B, > could you please tell me how it would proceed ( what would be > the call flow and how do you avoid relaying media twice?). > > > > Thanks in advance. >
The mechanism is described in section 4.5 of http://code.sipfoundry.org/browse/~raw,r=14975/sipXecs/main/sipXproxy/do c/NAT-traversal/NAT_Traversal_Design_Doc.doc. It does not have a call flow, but I think that the mechanism can be understood from the test alone. _______________________________________________ sipx-dev mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-dev Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev sipXecs IP PBX -- http://www.sipfoundry.org/
