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Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!apple!julius.cs.uiuc.edu!rpi!uupsi!alsys1!bob
From: bob@alsys1.aecom.yu.edu (Bob Lummis)
Newsgroups: comp.dcom.lans,comp.dcom.sys.cisco
Subject: Lightning protection
Message-ID: <398@alsys1.aecom.yu.edu>
Date: 29 Nov 90 14:07:00 GMT
Followup-To: poster
Organization: Albert Einstein College of Medicine, NY
Lines: 17

Does anyone have a recommendation for lightning protection on 10Base-T
links that go through a direct-buried cable between two buildings?  The
buried portion of the cable is about 300 feet long.  I plan to put 10Base-T
transceivers at each end immediately at the building entrance points, then
run the AUI cables upstairs to equipment locations.

Is there some kind of thingee that I can connect between the twisted
pairs and ground at each end of the cable that will short
lightning-caused current surges to ground but that will not disturb
10Base-T signals?  Preferably the thingees would act non-destructively
(i.e. not just melt or vaporize).

I think the cable TV industry uses some kind of diode-like device that does
this while not interfering with TV signals.  But I don't know what it is.
-- 
Bob Lummis, Director, Research Information Technology  (bob@aecom.yu.edu)
Albert Einstein College of Medicine, Bronx, NY  212-430-4211  FAX:212-430-2488