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From: robinson@ecsvax.UUCP (Gerard Robinson)
Newsgroups: comp.dcom.lans
Subject: Re: Cheapernet query
Message-ID: <3044@ecsvax.UUCP>
Date: Tue, 5-May-87 13:57:49 EDT
Article-I.D.: ecsvax.3044
Posted: Tue May  5 13:57:49 1987
Date-Received: Thu, 7-May-87 05:03:59 EDT
References: <351@dcl-csvax.comp.lancs.ac.uk>
Reply-To: robinson@ecsvax.UUCP (Gerard Robinson)
Distribution: world
Organization: UNC Educational Computing Service
Lines: 22

In article <351@dcl-csvax.comp.lancs.ac.uk> david@comp.lancs.ac.uk (David Coffield) writes:
>Suppose some Sun-3s were linked via a Cheapernet and the Cheapernet
>was to be connected to an ordinary Ethernet, linking other Suns and
>Vaxes (so it's all TCP-IP based). What do we get in the way of a connector
>to link the Cheapernet to the Ethernet so it all looks like one net?

The only official way of doing this (that I know of) is to use a repeater of
some sort.  One can purchase a thick-wire transceiver, a thin-wire transceiver
and a standard segment-to-segment ethernet repeater, and accomplish this end.
Total cost (depending on your discounts and lengths of transceiver cables) 
would be ~$1,750.  A slightly more expensive, but more flexible solution, is
provided by DEC, Cabletron, and perhaps others in the form of a MULTIPORT
repeater (re: attribution below).  This unit acts as a repeater, but allows
up to eight thin-wire segments to be attached to a thick-wire one, with each
segment electically terminated in the box itself.

>Any suggestions on products, costs etc welcome. I know DEC make something
>to do this but am not sure whether it would suit us.


						Gerard Robinson
						UNC School of Medicine