On Thu, Sep 10, 2009 at 2:24 PM, Dean Collins <d...@cognation.net> wrote: > > It might just be me but what is trapezoidal voip? > > > > > > Regards, > > Dean Collins > Cognation Inc > d...@cognation.net > +1-212-203-4357 New York > +61-2-9016-5642 (Sydney in-dial). > +44-20-3129-6001 (London in-dial). >
I don't know if I'll be able to make the call but my guess is he's referring to the SIP trapezoid: http://www.iptel.org/sip_trapezoid The SIP trapezoid is a concept/teaching tool usually used in situations involving a proxy (or multiple proxies) illustrating the SIP concept of distinct separation between signaling and media. Granted this isn't unique to SIP... ISDN, SS7, H.323, MGCP, and I'm sure others also make this distinction. IAX is the only protocol I know of that doesn't (which is where most of it's NAT advantages come from). He's probably going to talk about the advantages and disadvantages of "the trapezoid" although from the title I'm guessing he's going to focus on the disadvantages ;). Then again I could be completely wrong. The SIP trapezoid is real but this speculation is purely my own. -- Kristian Kielhofner http://www.astlinux.org http://blog.krisk.org http://www.star2star.com http://www.submityoursip.com http://www.voalte.com _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2009 - October 13 - 15 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
