Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!usc!elroy.jpl.nasa.gov!freedom!cornutt
From: cornutt@freedom.msfc.nasa.gov (David Cornutt)
Newsgroups: comp.dcom.lans
Subject: Re: 10BaseT Wiring question
Message-ID: <1990Nov28.134820.20875@freedom.msfc.nasa.gov>
Date: 28 Nov 90 13:48:20 GMT
References: <677@nih-csl.nih.gov>
Organization: MSFC
Lines: 15

brunetti@dumbo.nih.gov (Jim Brunetti) writes:
>Can anyone tell me if the 10BaseT spec has any mention of having multiple
>data  runs in the same sheath.  We have run 4 pair to locations running Starlan
>and were wondering if we could use the 2 unused pair for another connection.

You can try, but I wouldn't do it.  I've had bad luck with RS-232 runs
in multi-pair cable, where the individual pairs weren't sheathed.  I worked
in one place that did this, and it was crosstalk city on runs of only
about 200 feet.  Even lowering the rates to 2400 baud didn't help on
some lines -- and this is a lot less critical than 10BaseT.
-- 
David Cornutt, New Technology Inc., Huntsville, AL  (205) 461-6457
(cornutt@freedom.msfc.nasa.gov; some insane route applies)
"The opinions expressed herein are not necessarily those of my employer,
not necessarily mine, and probably not necessary."