Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!usc!julius.cs.uiuc.edu!rpi!uupsi!sunic!ugle.unit.no!nuug!ifi!enag From: enag@ifi.uio.no (Erik Naggum) Newsgroups: comp.protocols.iso Subject: Re: question about transport layer protocol Message-ID: Date: 21 Jan 91 22:50:56 GMT References: <1991Jan18.220611.14357@bronze.ucs.indiana.edu> <42617@cos.com> Sender: enag@ifi.uio.no (Erik Naggum) Organization: Naggum Software, Oslo, Norway Lines: 18 Nntp-Posting-Host: svarte.ifi.uio.no In-Reply-To: howard@cos.com's message of 21 Jan 91 17:47:01 GMT Originator: enag@svarte.ifi.uio.no I would like to interject that European X.21 networks are an order of magnitude more reliable than European X.25 networks, and have actually progressed beyond X.25 in relative reliability as the X.25 networks were upgraded. X.21 folks in Germany and Scandinavia are waging a "war" against the X.25 folks, inside the Telcos, to provide 99.99% reliability when the X.25 want to provide 99.9% reliability. X.25 in Norway (Oslo, in particular) has a 97.95% reliability, and is a royal pain in the butt to use for week-long connections. (Yes, we have those, and have _never_ experienced a clear on the X.21 network!) I don't have exact numbers for the X.21 network as seen in Oslo, but our experience indicates between 99.95% and 99.97%, counting an occational call cleared immediately after connection by the service provider. -- [Erik Naggum] Snail: Naggum Software / BOX 1570 VIKA / 0118 OSLO / NORWAY Mail: , My opinions. Wail: +47-2-836-863 Another int'l standards dude.