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. 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=53933&t=53852 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
