From owner-freebsd-stable Mon May 24 9:48:27 1999 Delivered-To: freebsd-stable@freebsd.org Received: from shell.webmaster.com (mail.webmaster.com [209.133.28.73]) by hub.freebsd.org (Postfix) with ESMTP id 91A951553F; Mon, 24 May 1999 09:48:17 -0700 (PDT) (envelope-from davids@webmaster.com) Received: from whenever ([209.133.29.2]) by shell.webmaster.com (Post.Office MTA v3.5.3 release 223 ID# 0-12345L500S10000V35) with SMTP id com; Mon, 24 May 1999 09:48:14 -0700 From: "David Schwartz" To: "Tom" Cc: , Subject: RE: ISDN Terminal adapter no work Date: Mon, 24 May 1999 09:48:14 -0700 Message-ID: <000001bea605$374504f0$021d85d1@whenever.youwant.to> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2377.0 In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Umm, 33.6 modems are synchronous. DS > On 24 May 1999, Dag-Erling Smorgrav wrote: > > > "Craig Harding" writes: > > > Most TA's act just like very fast modems. > > > > "very" is perhaps not the right word, since an single ISDN channel is > > less than twice as fast as a 33k6 modem. > > Nope. > > First of all, most everyone gets 2B+D ISDN (2 x 64K) anyhow, in fact > 1B+D (64k) isn't available in most areas of the world. > > Second, ISDN is sync, but modems are async. Now some people use various > async emulation protocols over ISDN (like V.120), but that is a complete > waste, especially if all you are doing is PPP. > > Here is what is looks like: > > 64k ISDN channel: 64000 / 8 = 8000 bytes/sec > 2 x 33.6 modem: 67200 / 10 = 6720 bytes/sec > > So a 64k ISDN channel is fair amount faster (about 20%) than two 33.6k > modems. > > > DES > > -- > > Dag-Erling Smorgrav - des@flood.ping.uio.no > > > Tom > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message