Re: [asterisk-users] VUC: RE: Friday 11th: Aswath Rao: Trapezoidal VoIP is Evil on VoIP Users Conference at Noon EDT
On Fri, Sep 11, 2009 at 4:18 AM, SIP s...@arcdiv.com wrote: See... I would say the 'trapezoid' is one of the great strengths of SIP. Which is why we need you all to come and discuss this, bringing up other aspects, thoughts (even I have a few occasionally) and ideas. @Dean - you will always learn new things on VUC, even if it's only that Ebay is the devil who comes after you mercilessly when your account is taken over and they know it and did nothing to stop the bleeding. Kristian - if you do happen to make it, be sure you are on IRC and/or use the wideband bridge at 200...@login.zipdx.com (if you're doing g722) Speaking of g722, isn't there a SIP client for linux? I know that so far we haven't had anything that works for OS X, but I am hoping that Counterpath will add g722 to eyebeam or Bria on that platform. In the meantime, I get on in Windows XP with Counterpath. Recently I realized that setting Eyebeam to auto-answer and ZipDX to phone me at conference time, things are even easier. I think it will be interesting today with Aswath, but other voices are needed: be there you techies! /r PS, A brand new Gigaset S675IP and A58H accessory handset will be given away at the end of the first segment. This phone works great, I've had mine for over a year. Do I have to repeat what makes it good? I will when we ask the contest question. Be there! batteries ARE included. And it runs a long time on a charge ___ -- 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
Re: [asterisk-users] VUC: RE: Friday 11th: Aswath Rao: Trapezoidal VoIP is Evil on VoIP Users Conference at Noon EDT
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
Re: [asterisk-users] VUC: RE: Friday 11th: Aswath Rao: Trapezoidal VoIP is Evil on VoIP Users Conference at Noon EDT
Kristian Kielhofner wrote: 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. See... I would say the 'trapezoid' is one of the great strengths of SIP. Forcing RTP along the same path as SIP means you can't rely on all those incredibly powerful advantages that routers have in pushing packets along the best routes they have. You have to rely on the SIP proxy to do routing better than a router... except with additional mandatory hops in between to hit remote proxies. Just a bad idea overall. Let the proxies authenticate, since that's what they're best at. And let the routers route, since that's what they're best at. N. ___ -- 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
