28 Mar
2001
28 Mar
'01
4:52 a.m.
On Mar 28, 1:33, Tony Duell wrote:
78 ohms. The standard also specifies maximum length of 50m for the thick
AUI cable, but "office grade" cables have higher losses and are typically
only rated for a quarter of that.
--
Pete Peter Turnbull
Network Manager
Dept. of Computer Science
University of York
On Mar 28, 0:52, Iggy Drougge wrote:
> As for impedance, I was under the impression,
judging from the current
> discussion on the topic of 10B5 wiring, that the actual work of making
the
AUI
output
ethernet-worthy lay in the transceiver.
That's one part of it. But the AUI interface is part of the standard too
-- any device should be able to work with any transceiver. The AUI
interface consists of 3 differential ECL signals (AC coupled
essentially), which should be carried on twisted-pair transmission lines
(I think the characteristic impedance is somewhere around 100 Ohms, but
don't quote me on that).