Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!amdcad!ncpjmw
From: ncpjmw@amdcad.AMD.COM (Mike Wincn)
Newsgroups: comp.dcom.lans
Subject: Re: Shielded vs. Unshielded
Keywords: ethernet, twisted pair, shielded
Message-ID: <26128@amdcad.AMD.COM>
Date: 26 Jun 89 16:26:50 GMT
References: <4015@quest.UUCP>
Reply-To: ncpjmw@amdcad.UUCP (Mike Wincn)
Organization: Advanced Micro Devices
Lines: 28

In article <4015@quest.UUCP> stone@quest.UUCP (Scott Stone) writes:
>
>  I would like some informed opinions on shielded vs. unshielded cable.
[...]

>  Do the current twisted pair ethernet solutions work just as reliably
>  (or more reliably) on shielded twisted pair?

The current draft standard is intended to describe a system operating over
at least 100m of 24 GA unshielded twisted pair cable, as a minimum requirement.
If there is no further change that arises out of ballot comments, and once
10BASE-T becomes an approved standard, a "non-standard" (for lack of a better
term) cable may be used provided it meets minimum attenuation, impedance,
delay, and jitter characteristics.
>
>  When you ground one end of the shielded cable, where do you usually
>  find a convenient ground?
>
Wherever ground exists in the MAU or DTE.

>* Scott T. Stone	{rosevax,bungia}!quest!stone

Mike Wincn
ncpjmw@amdcad.AMD.COM
(408) 749-3156

The opinions expressed are my own, not necessarily those of my employer, 
nor those of 802.3 Committee or 10BASE-T Task Force.