I remeber what that emergency network is: GETS. --
RFC 1149 Compliant. ""Steven A. Ridder"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > I always thought that the PSTN was based off of that fact that not all > phones would be calling at once, and if they did, then some would get > through while others wouldn't. Then to ensure that important calls got > through during these periods, there was the priority network that gov't > officials have with their PINS, etc. (Can't remember the name, but there's > also an IETF working group working on the same thing.) > > I don't think that the Converged Network theory is reinventing the wheel and > is a dead end. I think the opposite is true. The TDM/PSTN world is dead > (or dying) and that most calls are circuit-switched across ATM now. Now if > someone could just solve the last mile.... > > -- > > RFC 1149 Compliant. > > > > ""The Long and Winding Road"" wrote in > message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > ""Steven A. Ridder"" wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > I understand the technology and stand by whoever said what IP > > telephony/VoIP > > > isn't a bandwidth hungry app. It isn't. G.729, which can use as little > > as > > > 8k with proper compresion, has nearly the same MOS score as G.711, which > > is > > > toll quality. Even though it's not officially "toll quality" I consider > > it > > > toll quality, as I can't tell the difference, and most people couldn't > > > either. Even if using G.711, I can still use compression and VAD to get > > > down to 25K or so, which isn't bandwidth hungry in my book either. > > > > > > I think the apps that will be on a converged network in the future will > be > > > bandwidth hungry, such as video. Voice isn't. > > > > > > > CL: I don't think the issue is the bandwidth taken by one compressed call. > > The issue is poisson 99. I think that's how the telco guys call it. What > > happens when a significant number of calls "must" go through - say during > an > > emergency? > > > > CL: current telco networks are engineered such that you get dial tone > 99.5% > > of the time you go off hook, day or night, busy hour or not. the VoIP > > netowork must not only operate at that kind of reliability, but must > > tramsmit data simultaneously. > > > > CL: This rush to converged networks means not only reinventing what the > > telcos have already done, but building out a whole new infrastructure as > > well. There is at least one school of thought that calls this a dead end. > > > > CL: one of the bad things that has come out of Microsoft is the attitude > > that Mainframe computers are just PC's with a little bit more horsepower > and > > that the internet is just a bigger version of the Microsoft campus > network, > > with a few more hubs involved. I see one of the bad things about Cisco's > > vision of converged networks is the attitude that the Telephone Network is > > nothing more than just the Cisco campus telephone network with a few more > > phones attached. > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > From: Joe A > > > > To: 'Nathan Chessin'; 'Albert Lu'; [EMAIL PROTECTED] > > > > Cc: [EMAIL PROTECTED] > > > > Sent: 10/14/02 11:52 AM > > > > Subject: RE: Cisco ExecNet > > > > > > > > Maybe I should say IP Telephony, not VoIP. How many uncompressed, > > > > toll-quality calls can you push out simultaneously over a T1??? Have > > > > you done the math? 24? Maybe 23 on a good day. Sure, if you use > > > > compression you can squeeze in quite a bit more, but you can't deny > that > > > > IPT is bandwidth-hungry, with streaming MOH, voicemail audio streams, > > > > the calls themselves. Believe me, VoIP is absolutely a > bandwidth-hungry > > > > app. No one who understands the technology would deny that. > > > > > > > > Joe > > > > > > > > -----Original Message----- > > > > From: Nathan Chessin [mailto:[EMAIL PROTECTED]] > > > > Sent: Friday, October 11, 2002 1:56 AM > > > > To: 'Joe'; 'Albert Lu'; [EMAIL PROTECTED] > > > > Cc: [EMAIL PROTECTED] > > > > Subject: RE: Cisco ExecNet > > > > > > > > > > > > 1) Since when is VoIP a "bandwidth-hungry app" > > > > > > > > Nate > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf > Of > > > > > > > > > Joe > > > > > Sent: Thursday, October 10, 2002 8:42 PM > > > > > To: 'Albert Lu'; [EMAIL PROTECTED] > > > > > Cc: [EMAIL PROTECTED] > > > > > Subject: RE: Cisco ExecNet > > > > > > > > > > > > > > > Technology isn't necessarily heading in that direction - Cisco is > > > > > driving it there. Bottom line is this: Cisco is traditionally a > > > > > router and switch manufacturer, and no one buys routers and switches > > > > > these days, at least not enough to provide continued growth for > Cisco. > > > > > Company infrastructures are already built, have been for > > > > > years, and are > > > > > running for the most part nowhere near capacity. These technology > > > > > applications, besides generating hardware sales directly, will also > > > > > increase bandwidth consumption, thereby causing indirect > > > > > hardware sales > > > > > when customers upgrade their routers and switches to support the new > > > > > bandwidth-hungry apps like VoIP. If Cisco can drive the customers' > > > > > purchases in that direction, they win. > > > > > > > > > > My two cents. > > > > > > > > > > Joe > > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On > > > > > Behalf Of > > > > > Albert Lu > > > > > Sent: Thursday, October 10, 2002 8:16 AM > > > > > To: [EMAIL PROTECTED] > > > > > Cc: [EMAIL PROTECTED] > > > > > Subject: OT: Cisco ExecNet > > > > > > > > > > > > > > > Hello Group, > > > > > > > > > > Has anyone checked out the Cisco ExecNet, which is basically > thoughts > > > > > about where technology is heading in the future from the VPs at > Cisco. > > > > > > > > > > http://newsroom.cisco.com/dlls/tln/execnet/ > > > > > > > > > > >From what they are saying (specifically Mike Volpi), the > > > > > direction for > > > > > technology is heading towards: CDN, Security, Wireless, IP > Telephony, > > > > > VPN. Reegineering business processes to best utilise these > > > > > technologies in order to improve productivity and reduce cost for > > > > > enterprises. > > > > > > > > > > Does anyone have any comments about this, and where money > > > > > will be spent > > > > > in the future for technologies? > > > > > > > > > > Regards, > > > > > > > > > > Albert Lu > > > > > CCIE #8705 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=55607&t=55573 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
