""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > In what ways was the SIP equipment better? The fact that it comes from a > "www/internet" IETF world, versus H.323 which comes from the ITU, wouldn't > necessarily mean that it's better. In fact, to make a very broad > generalization, the IETF has historically been involved with data networking > which hasn't been that concerned about quality. Reliability is achieved, in > general, by the sender retransmitting if there's no ACK, which doesn't work > with voice. Quality is achieved by various hacks. ;-) > > At least in the U.S., our telephone networks have always been way more > reliable and offered better quality than our data networks, which have been > annoyingly flaky. When we pick up a phone to make a call, unless it's > Mother's Day and all circuits are busy, it simply works. Problems are rare. > Problems accessng data on intranets and the Internet are widespread. So it > doesnt' fit with our paradign that you would think that SIP is better > because it comes from a "www/Internet" world.
CL: this dinosaur personally believes that Voice of IP isn't a real great idea. But then again, I never thought much of shoes with roller skate wheels built in, nor of skateboards that didn't consist of someone's sister's skates cannibalized and nailed to the bottom of a 1 x 4. Nor has this particular dinosaur ever thought much of telco deregulation, something else which seemed like a good idea, but resulted in the destruction of one of this nation's most valuable assets - the telephone network. CL: too old to rock and roll.( although to judge from what my kids listen too, I am beginning to suspect that rock and roll is to them what hit parade was to me :-> ) too old to network, too young to retire.... ;-> > > SIP may be better because it's always easier to do something better the > second time around. SIP is newer. H.323 is old. > > Anyway, this philosophical debate probably isn't that relevant, but things > are slow today at work. ;-) > > Priscilla > > > Gunjan Mathur wrote: > > > > I tested one SIP equipement of vonage, and that was > > far far better then any device using H323...that's the > > reason I want to know the diff in between these two. > > What I understand is SIP model works on www/internet > > and h323 model is telephony, I believe this is the > > main reason for the quality difference. > > > > What you suggest... > > TIA > > > > --- "Steven A. Ridder" wrote: > > > I agree that SIP is the future, it just isn't there > > > yet. There is some SIP > > > being built into Unity and CM, but until everything > > > is SIP (as opposed to > > > MGCP/H.323 and Skinny), it just isn't useful yet. > > > > > > I know that SIP is being deployed in SP networks, > > > and I have implemented it > > > in a Telco, but for enterprise, it's useless. I > > > can't wait til it is > > > developed and more mature. > > > > > > > > > ""Jason Weden"" wrote in message > > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > > Ok, so SIP is nowhere near useless. It is being > > > used all over the place > > > and > > > > will eventually replace H.323. Telcos like Vonage > > > (which uses Cisco SIP > > > > equipment), deltathree, and Denwa are using it for > > > last mile telephony > > > > connectivity for residences and enterprises, and > > > WorldCom, after surfacing > > > > from its financial issues, will be using it on its > > > global network as well. > > > > Microsoft has built a SIP client into Windows XP > > > (Microsoft Messenger) and > > > > SIP is very flexible and extensible and the best > > > place to start is > > > > http://www.sipcenter.com. PBX manufacturers like > > > Mitel and Siemens have > > > > developed their PBX completely around SIP. > > > > > > > > To get back to Cisco (as this is a Cisco > > > newsgroup), Cisco has taken the > > > > time and $$ to start to develop SIP functionality > > > in its products despite > > > > the fact that it isn't need for AVVID at all. > > > Though their initial SIP > > > > focus is on carrier-class products (since that is > > > the logical choice -- > > > see > > > > my list of companies above), my bet is that SIP > > > will surface as a more > > > > central part of the AVVID architecture for the > > > enterprise. A good Cisco > > > > link is here: > > > > > > > > > http://www.cisco.com/warp/public/cc/techno/tyvdve/sip/prodlit/index.shtml > > > > > > > > or here (which displays more enterprise > > > scenarios): > > > > > > > > > > > > > http://cisco.com/univercd/cc/td/doc/product/voice/sipsols/biggulp/index.htm > > > > Regards, > > > > > > > > Jason > > [EMAIL PROTECTED] > > > > > > __________________________________________________ > > Do you Yahoo!? > > New DSL Internet Access from SBC & Yahoo! > > http://sbc.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53935&t=53852 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
