10Base5/Thicknet (was Re: SUN networking problems)

From: jpero_at_sympatico.ca <(jpero_at_sympatico.ca)>
Date: Sat Mar 24 13:00:30 2001

> From: ard_at_p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: 10Base5/Thicknet (was Re: SUN networking problems)
> To: classiccmp_at_classiccmp.org
> Date: Sat, 24 Mar 2001 23:41:03 +0000 (GMT)
> Reply-to: classiccmp_at_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).

I recall that in musical stuff and in wirings often these waves
travelling in any tube or wirings tend to be standing waves that why
that marking is where the amptitudes is greatest.

Same with in engines when designing intake and exhaust systems to
assist air movement with least effort due to the reflections and
standing waves.

That's bit of my recollections from physics in school and from
newsgroups readings.

Cheers,

Wizard

>
> -tony
 
Received on Sat Mar 24 2001 - 13:00:30 GMT