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Path: utzoo!watmath!clyde!floyd!harpo!decvax!decwrl!Jeff
From: Jeff@decwrl.UUCP
Newsgroups: net.lan
Subject: Ethernet transceivers
Message-ID: <6567@decwrl.UUCP>
Date: Wed, 28-Mar-84 21:14:59 EST
Article-I.D.: decwrl.6567
Posted: Wed Mar 28 21:14:59 1984
Date-Received: Fri, 30-Mar-84 01:25:23 EST
Organization: DEC Western Research Lab, Los Altos, CA
Lines: 22

Here's my experience with transceiver/interface compatability:

	Interface:	DEUNA		3Com		Interlan
Xcvr
================================================================
H4000			works		not tried	not tried

3Com			doesn't		works		works

TCL			works		not tried	works


We think the DEUNA/3com combination fails because the 3com xcvr eats
a few bits of the "preamble", which is apparently legal, but the DEUNA
self-test microcode can't deal with that.

As to crashing a system by plugging in the xvcr: yes, the Interlan
board draws a large surge and causes a DC LO.  The DEUNA's cable
attachment panel apparently cures this, because we don't have that
problem with DEUNAs.

-Jeff (...decwrl!Shasta!mogul, mogul@shasta.ARPA)