Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!zodiac!deimos!jshelton
From: jshelton@deimos.ADS.COM (John L. Shelton)
Newsgroups: comp.dcom.lans
Subject: Re: null Ethernet
Message-ID: <6874@zodiac.UUCP>
Date: 12 Feb 89 03:33:23 GMT
References: <1064@wasatch.UUCP> <27748@bu-cs.BU.EDU> <1070@wasatch.UUCP> <1987@ogccse.ogc.edu>
Sender: news@zodiac.UUCP
Reply-To: jshelton@ads.com (John L. Shelton)
Organization: Advanced Decision Systems, Mt. View, CA (415) 960-7300
Lines: 19


We make Null Ethernet cables here at ADS without any electronics.
Each ethernet cable has 4 PAIRS of wires:  

Transmit
Receive
Collide
Power

We connect Transmit to Receive on the other cable,
           Receive to Transmit
           Collide remains disconnected
           Power remains disconnected

It doesn't work for all devices, but for many.

Send me mail if you want details.

=John=