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Article #1068Re: 10T and number of twists per foot.
From: tanemeth
Date: Wed, 27 Jan 1993 23:40
Date: Wed, 27 Jan 1993 23:40
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In article <slendt.105.727652267@unomaha.edu>, slendt@unomaha.edu (Steven Lendt) writes: > How many twists per foot in solid core unshelded twisted pair wire are > needed to make it live up to level 3 10baseT spec? EIA568 spec. says "7 to 10 twists per foot". Most cables I have seen interpret this as 7 for pair 1 (blue), 8 for pair 2 (orange), 9 for pair 3 (green) and 10 for pair 4 (brown). > Also, how many punch blocks (old 66 type) is it safe to go through if the > total wire length is not greater than 75 meters? Always as FEW AS POSSIBLE. Should ideally be 3 max. From memory, you need to deduct 2m from max usable length for each extra cross-connect. Tom Nemeth
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Path: arc1-ca.pugleaf.net!sparky!uunet!opl.com!hri.com!spool.mu.edu!howland.reston.ans.net!paladin.american.edu!gatech!darwin.sura.net!sgiblab!munnari.oz.au!yoyo.aarnet.edu.au!news.adelaide.edu.au!economics.adelaide.edu.au!tanemeth From: tanemeth@economics.adelaide.edu.au Newsgroups: comp.dcom.lans.ethernet Subject: Re: 10T and number of twists per foot. Message-ID: <1993Jan28.091022.1@economics.adelaide.edu.au> Date: 27 Jan 93 23:40:22 GMT References: <slendt.105.727652267@unomaha.edu> Organization: Economics, University of Adelaide Lines: 16 NNTP-Posting-Host: eco.economics.adelaide.edu.au