Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!kuhub.cc.ukans.edu!zeus!network
From: network@zeus.unl.edu
Newsgroups: comp.dcom.lans
Subject: Grounding Ethernet coax lines.
Message-ID: <3824.25292578@zeus.unl.edu>
Date: 4 Oct 89 03:32:40 GMT
Lines: 32


   Currently on our campus we have thick and thin Ethernet coax lines.
I have heard that it is advisable to ground these lines. 
Building to building connections are done with fiber optic bridges,
so I'm not worried about these lines getting fried.
I'm more concerned about light and generator problems.

My questions are:
1)  Should a line be grounded only on one end, or on both ends?
    Should it be grounded at all?
2)  What about in line taps that go to devices such as a repeater
    or bridge.  Meter checks show that this makes a solid ground,
    so does that count as one of the grounds?  In these cases do
    we need to add any ground at all?
3)  BNC Tee connections to a Ethernet card in a PC seem to make a
    very weak ground or no ground at all.  Should we ground these
    connections?
4)  Is it advisable to isolate against all unintentional grounds
    as with a connection touching a metal rack by wrapping the
    metal part of the connection?

    I'm completely confused after talking with Digital Equipment.
    Each person I talked to there had a different answer.

Suggestions and comments are appreciated.

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