Date: Mon, 16 Oct 2000 22:59:58 +0200 From: Len Conrad <lconrad@Go2France.com> To: freebsd-questions@FreeBSD.ORG Subject: Re: Best DSL Router? Message-ID: <5.0.0.25.0.20001016224843.048dd3d0@mail.Go2France.com> In-Reply-To: <Pine.BSF.4.21.0010161032330.1344-100000@oahu.WURLDLINK.NET > References: <Pine.BSF.4.21.0010151017100.1344-100000@oahu.WURLDLINK.NET>
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> 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
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