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From: charlie@oblio.UUCP (Charlie Richardson)
Newsgroups: comp.dcom.lans
Subject: Ethernet Null Modem- Ever Heard of It?
Message-ID: <383@oblio.UUCP>
Date: Wed, 18-Mar-87 23:37:51 EST
Article-I.D.: oblio.383
Posted: Wed Mar 18 23:37:51 1987
Date-Received: Sat, 21-Mar-87 04:52:29 EST
Distribution: na
Organization: Counterpoint Computers, San Jose
Lines: 22
Keywords: Ethernet TCP-IP connection direct transceiver

Is there such a thing as an Ethernet null modem cable which allows
you to connect any TWO machines directly, i.e. from the xceiver port
on one system to the port on the other WITHOUT using a transceiver?

The systems in question are full IEEE 802.3 xceiver specifications.

Our East Coast tech support engineer swears he has seen a cable reputed
to be such a thing. It seems to me that it might be possible with TCP/IP
only; you could connect the differential transmit lines of one port to
the receive lines of the other. The only joker in the deck would be how
to handle collision detect; maybe you don't have to worry about it since
TCP/IP protocol would NAK the packet and ask for another if garbled. 

... or is this theory a crock????

Please help out with comments, "crock" responses, or whatever! Thanks.

Charlie Richardson

Counterpoint Computers, Inc. , San Jose, CA 
Voice: (800) CPC-TALK 
UUCP: ...![nsc,hplabs]!oblio!charlie