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From: newbery@rata.vuw.ac.nz (Michael Newbery)
Newsgroups: comp.dcom.lans
Subject: Re: Repeaters Grounding Thin Ethernet coax lines.
Message-ID: <1989Oct11.220042.798@comp.vuw.ac.nz>
Date: 11 Oct 89 22:00:42 GMT
References: <3824.25292578@zeus.unl.edu> <2128@avsd.UUCP> <27682@amdcad.AMD.COM> <6638@pdn.paradyne.com>
Sender: news@comp.vuw.ac.nz (News Admin)
Reply-To: newbery@rata.vuw.ac.nz (Michael Newbery)
Organization: Computing Serv. Ctr, Victoria Uni., Wellington, New Zealand
Lines: 16

In article <6638@pdn.paradyne.com> dixon@gumby.paradyne.com (0000-Tom Dixon) writes:
>Do any vendors make repeaters that have configurable ports that can
>either be grounded or not?
The 3Com modular boxes have a screw on each card that you shift to
earth/not earth the segment. You can likewise elect to have internal 50Ohm
termination or not.

On the subject of earthing and noise---be very carefull about the quality
of your transceiver cables. We traced a number of very high error rates to
substandard xcvr cables. The cables worked OK in benign environments but
were unsatisfactory in noisy ones (like machine rooms.)


--
Michael Newbery<newbery@rata.vuw.ac.nz> (...!uunet!vuwcomp!newbery if you must)
"MVS - well yes, it's big - but it IS slow!"