> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:asterisk-users- > [EMAIL PROTECTED] On Behalf Of SIP > Sent: Monday, August 06, 2007 8:56 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [asterisk-users] Teliax Quality of Service > > Steve Totaro wrote: > > Anthony Francis wrote: > > > >> Tim Panton wrote: > >> > >> > >>> On 5 Aug 2007, at 06:54, Douglas Garstang wrote: > >>> > >>> > >>> > >>> > >>>> I don't think creating a network without a single point of failure > >>>> is unreasonable. > >>>> > >>>> > >>>> > >>> It's impossible. I can't think of a single example where this > >>> actually exists. > >>> > >>> Getting even close is hideously expensive. > >>> > >>> Tim, speaking for himself :-) > >>> > >>> _______________________________________________ > >>> --Bandwidth and Colocation Provided by http://www.api-digital.com-- > >>> > >>> asterisk-users mailing list > >>> To UNSUBSCRIBE or update options visit: > >>> http://lists.digium.com/mailman/listinfo/asterisk-users > >>> > >>> > >>> > >> In fact, the only people who would say something like this are folks > who > >> have never PHYSICALLY implemented a network, they simply don't > >> understand the limitations involved.
I worked for a CLEC in Montana, not Silicon Valley, not Manhatten, but rather PODUNK, Montana. We had redundant multi-homed servers, connected to multiple switches, running OSPF. A failure in any component (server, network, cable) would cause a failover to a backup component in about 6 seconds. We had multiple upstream providers. The servers where divided between multiple racks, split between different power plants. We did just about everything we could to make the setup redundant. The CPE equipment at any single location might fail, and that wasn't redundant, but at least if that failed, it would not affect any other customers. CPE equipment included POE enabled phones, a UPS, a POE switch and power being delivered from our plant. Yes, all the equipment was located at the same physical location. In hindsight, we could have multi-homed our collocations. Why can't service providers multi home their edge systems to accept incoming calls from two physical locations? If a service provider did this, they would have two completely independent facilities, potentially thousands of miles apart, connected to different upstream providers. I can't think of anything short of nuclear war that would destroy their ability to accept calls. If they did least cost routing, it wouldn't even matter if their providers failed. China gets hit by a meteor and NO provider can deliver calls to China? Fine... at least you can still call everywhere else. Maybe it still had some holes, but jeez, at least we tried to deliver high quality service. _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users