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From: greg@duke.cs.unlv.edu (Greg Wohletz)
Newsgroups: comp.dcom.lans,comp.protocols.tcp-ip
Subject: Standard cable lengths
Message-ID: <1425@jimi.cs.unlv.edu>
Date: 15 Dec 89 22:13:37 GMT
Sender: news@jimi.cs.unlv.edu
Reply-To: greg@duke.cs.unlv.edu (Greg Wohletz)
Followup-To: comp.dcom.lans
Organization: UNLV Computer Science and Electrical Engineering
Lines: 15

To quote from some cabletron documentation:

	When making up networks requiring shorter cable run, Ethernet
standard length 23.4m, 70.2m, and 117 meter cable sections should be
used.  These cable sections may be connected together to form a cable
segment by using a barrel connector.  Use of non-standard cable
lengths may result in impedance mismatches causing reflections to
occur.  These reflections may cause data errors.


My question is how critical is this?  I have some cable runs that will
probably be around 100 meters, should I be sure they are 117 meters?

    	    	    	    	    	    --Greg
    	    	    	    	    	    greg@duke.cs.unlv.edu