5 Mar
2004
5 Mar
'04
9:27 p.m.
On Mar 5, 18:16, Paul Koning wrote:
The rules aren't quite what you said -- the
transceiver rule is that
you put them on the stripes. You can put transceivers on adjacent
stripes.
You can, but I was always told (and read somewhere) there should be two
stripes between, not one.
Cable ends are NOT at stripes; the recommended cable
lengths are funny numbers chosen to get reflections not accumulate
over multiple segments. The rule says "odd multiples of a half wave
at 5 MHz, which translates to odd multiples of 23.4 meters.
I agree, I forgot about that. Oops!
--
Pete Peter Turnbull
Network Manager
University of York
8 Mar
8 Mar
2:01 a.m.
>>>> "Pete" == Pete Turnbull
<pete(a)dunnington.u-net.com> writes:
Pete> On Mar 5, 18:16, Paul Koning wrote:
> The rules aren't quite what you said -- the
transceiver rule is
> that you put them on the stripes. You can put transceivers on
> adjacent stripes.
Pete> You can, but I was always told (and read somewhere) there
Pete> should be two stripes between, not one.
Interesting. Your source is mistaken... Quoting from the Ethernet
Specification, Version 2 (DEC/Intel/Xerox), section 7.6.2:
... Coaxial cables marked as specified in 7.3.1.1.6 have marks at
regular 2.5 meters spacing; a transceiver may be placed at any mark
on the cable. This guarantees both a minimum spacing between
transceivers of 2.5 meters, as well as controlling the relative
spacing of transceivers to insure non-alignment on fractional
wavelength boundaries.
The 802.3 spec agrees with this (section 8.6.2.2).
paul
7595
days inactive
7597
days old
1 comments
2 participants
participants (2)
-
pete＠dunnington.u-net.com -
pkoning＠equallogic.com