From owner-freebsd-questions Mon Oct 16 13:59:51 2000 Delivered-To: freebsd-questions@freebsd.org Received: from mgw1.MEIway.com (mgw1.meiway.com [212.73.210.75]) by hub.freebsd.org (Postfix) with ESMTP id 0B3FA37B502 for ; Mon, 16 Oct 2000 13:59:49 -0700 (PDT) Received: from mail.Go2France.com (ms1.meiway.com [212.73.210.73]) by mgw1.MEIway.com (Postfix Relay Hub) with ESMTP id D2D5D6A901 for ; Mon, 16 Oct 2000 22:59:44 +0200 (CEST) Received: from sv.Go2France.com [212.73.210.79] by mail.Go2France.com with ESMTP (SMTPD32-6.04) id AD5F6C560146; Mon, 16 Oct 2000 23:04:31 +0200 Message-Id: <5.0.0.25.0.20001016224843.048dd3d0@mail.Go2France.com> X-Sender: lconrad%Go2France.com@mail.Go2France.com X-Mailer: QUALCOMM Windows Eudora Version 5.0 Date: Mon, 16 Oct 2000 22:59:58 +0200 To: freebsd-questions@FreeBSD.ORG From: Len Conrad Subject: Re: Best DSL Router? In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > As a followup, please discuss this on the following thread on the >newsgroups: ba.internet and comp.dcom.xdsl: > > >How will this > >help and is it with all ADSL implementations or only with PacBell since > >I noticed Cable Modems doesn't exhibit this problem. > >Cable modems do exhibit the problem when they are running at an upstream >cap -- the problem can happen with TCP/IP on *any* asymmetric link. ok, cool. The pb is not upstream "robbing" bandwidth from downstream, (ie, they are truly independent channels/media allowing full duplex) but bad congestion the slow channel slowing/blocking tcp/ip protocol responses awaited by the fast channel. > >Also, is ADSL > >technically full duplex or is it half duplex? > >Full duplex. ok > >From what Netopia and > >Cisco told me, ADSL is Assynchronous and not Synchronous like the other > >xDSL implementations. Thanks for any input you can provide. > >ADSL is synchronous. asymmetric, not asynchronous vbg > So I guess "guess" ? vbg >you were right that ADSL is Full Duplex but just >because it's Full Duplex doesn't mean that you will get the advertised >speeds simultaneously in both directions. You were right about the slowdown but wrong about the reason. And we both learned a few points. Well, I learned one, you learned more than one, "asymmetric learning", but don't let me slow you down!! LOL Thanks for the follow through, very helpful. The Paradyne book still applies and will help build street cred at the next geek cocktail party, even if Paradyne doesn't lead the market. Len http://BIND8NT.MEIway.com: ISC BIND 8.2.2 p5 installable binary for NT4 http://IMGate.MEIway.com: Build free, hi-perf, anti-spam mail gateways To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message