Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!lll-lcc!unisoft!gethen!farren From: farren@gethen.UUCP (Michael J. Farren) Newsgroups: comp.dcom.modems Subject: Re: Twisted Pair Ethernet Message-ID: <370@gethen.UUCP> Date: Sat, 21-Nov-87 14:05:47 EST Article-I.D.: gethen.370 Posted: Sat Nov 21 14:05:47 1987 Date-Received: Tue, 24-Nov-87 04:56:53 EST References: <16064@topaz.rutgers.edu> <361@gethen.UUCP> <2247@kitty.UUCP> Reply-To: farren@gethen.UUCP (Michael J. Farren) Organization: Sci-Fido - Unix in Oakland Lines: 26 First, a retraction and apology - the telephone company does run T1 lines through their standard cables, so my argument that they do not was bogus. I should not have made the statement that they did not without a little further checking. However: if I have learned anything in a fairly long career in digital electronics, including a significant amount of work on high-speed signal transmission, it is that you have to treat any signals above 1MHz with significant respect, if you are to get the results you want. My initial assumption was that what was being discussed here was running Ethernet signals through standard 4-wire phone interconnect wire, as opposed to twisted-pair cable. If this assumption is correct, then I have to agree with one of the previous posters - you are courting disaster if you do so, especially if you are running the wire over any significant distance, say, as an off the cuff judgement, over 20 feet or so. (I'd probably limit it to three feet, and be paranoid even then, but then, I'm like that) If you are using twisted-pair, and someone has paid close attention to the characteristics required of the drivers and receivers for those signals, then you can get acceptable results. Personally, I'd rather pay the extra bucks and get a system I'd have confidence in. -- ---------------- Michael J. Farren "... if the church put in half the time on covetousness unisoft!gethen!farren that it does on lust, this would be a better world ..." gethen!farren@lll-winken.arpa Garrison Keillor, "Lake Wobegon Days"