From owner-freebsd-hackers Sat Jul 17 8:30:10 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [209.157.86.2]) by hub.freebsd.org (Postfix) with ESMTP id 3A2A214CE6 for ; Sat, 17 Jul 1999 08:30:06 -0700 (PDT) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.9.3/8.9.1) id IAA74679; Sat, 17 Jul 1999 08:29:34 -0700 (PDT) (envelope-from dillon) Date: Sat, 17 Jul 1999 08:29:34 -0700 (PDT) From: Matthew Dillon Message-Id: <199907171529.IAA74679@apollo.backplane.com> To: Duncan Barclay Cc: hackers@FreeBSD.ORG, crypt0genic , Bill Paul , Vincent Poy Subject: Re: poor ethernet performance? References: Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG : :And you seen the nice square waves of 100Mb or !Gb ether on a line then? The :techniques used for transmitting 100Mb/s down copper are certainly not digital. :Pulse shaping, line estimation, ISI removal are all analogue! : :The cable itself is less improtant than the impedance matching at connectors :and bends in the cable. : :Duncan : :Duncan Barclay | God smiles upon the little children, :dmlb@ragnet.demon.co.uk | the alcoholics, and the permanently stoned. Obviously you don't get square waves going down the wire - But it is still a digital communications protocol. -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message