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From: phil@brahms.amd.com (Phil Ngai)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Ethernet Cards and long lines
Message-ID: <1990Nov27.072930.1813@amd.com>
Date: 27 Nov 90 07:29:30 GMT
References: <17358@netcom.UUCP> <1990Nov26.180842.9530@amd.com> <17572@hydra.gatech.EDU>
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Organization: Advanced Micro Devices, Inc; Sunnyvale, CA
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In article <17572@hydra.gatech.EDU> bb16@prism.gatech.EDU (Scott Bostater) writes:
||>The AUI spec is 50 meters so 125 feet should be legal if
||>he is talking about AUI cables.
|
|WD claimed 300 meters, maybe they should read the spec :-) In all fairness I
|should read it as well.

Now I'm confused. I don't understand what this 300 meters would be.
10BASE5 allows a 500 meter segment. (the thick yellow stuff)

|Does anybody know of an ethernet card that handles THICK ethernet lines of
|125 feet or more?

Well, as I said, the spec for AUI cables is 50 meters and I can't
say I've ever run into a problem with this particular limitation.
In fact, I am using a WD8003 (E? I don't know) and have never had
any trouble with it, although I don't know exactly how long my
AUI cables have been. By the way, the 50 meters is for regulation
AUI cable, there are "office rated" AUI cables which are thinner,
more flexible, and much higher loss. I think they have a distance
multiplier of about 4. Are your AUI cables more flexible than normal?
That might be related to your problem.

We also use, although none of this should be construed as a
recommendation, 3Com cards, and don't have any particular problem
with AUI cable length on them either.

Another possible option is to bring the thick yellow stuff closer
to your nodes.

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