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From: hans@erisun.UUCP
Newsgroups: net.lan
Subject: Re: Need Thin Ethernet Info
Message-ID: <479@erisun.UUCP>
Date: Thu, 13-Feb-86 11:12:47 EST
Article-I.D.: erisun.479
Posted: Thu Feb 13 11:12:47 1986
Date-Received: Mon, 17-Feb-86 05:33:59 EST
References: <1575@emory.UUCP> <133@suneast.uucp>
Reply-To: hans@erisun.UUCP (Hans Albertsson)
Organization: Ericsson Information Systems AB, Sundbyberg, Sweden
Lines: 31

[]

We discovered a while ago that you can actually simulate vampire taps
using a thin ether , T-connectors and standard in-line 3-com Xceivers.

What you do is as follows

Thin ether ->    ____________________ ____________________
T-connector ----->                   T
BNC-N crossover ---->                I
				   __I__
3-Com Xceiver ----->		   |   |
				   |___|
				     I
					
The lower N-connector on the 3-com stays unterminated!
Max permissible length from ether center conductor to 3-com far end
is probably around 10 ".

A screening cover lid might be a good idea for the free end of the
Xceiver.

No extensive tests were performed, but a couple ( 3 ) of stations seemed to
work ok, never jamming the ether while {,dis}connecting stations.
This ( if it really works ) removes one difficulty with thin ether.


-- 
 Two's complement, but three's an int.
Hans Albertsson EIS, USENET/uucp: {decvax,philabs}!mcvax!enea!erix!erisun!hans