24 Mar
2001
24 Mar
'01
5 a.m.
From: ard(a)p850ug1.demon.co.uk (Tony Duell)
Subject: Re: 10Base5/Thicknet (was Re: SUN networking problems)
To: classiccmp(a)classiccmp.org
Date: Sat, 24 Mar 2001 23:41:03 +0000 (GMT)
Reply-to: classiccmp(a)classiccmp.org
Hi
I haven't been following this thread as close as I should.
I was working at Intel during the period when ether net was just
being defined. The reason for the 2.5m spacing was to insure that
any collision was detected by all of the unit on the wire.
The idea was that the pulses would be exactly overlapped. This was
In that case, surely the correct spacing of transceivers would depend on
the velocity factor of the cable. And while the stnadard specifies the
spacing (2.5m +/- 5cm IIRC), it doesn't specify the velocity factor
(other than it must be greater than 0.77 IIRC).
-tony