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From: rpw3@redwood.UUCP (Rob Warnock)
Newsgroups: net.lan
Subject: Re: Ethernet cluster wiring?
Message-ID: <67@redwood.UUCP>
Date: Fri, 19-Oct-84 19:21:24 EDT
Article-I.D.: redwood.67
Posted: Fri Oct 19 19:21:24 1984
Date-Received: Sun, 21-Oct-84 14:58:07 EDT
References: <429@ima.UUCP>
Organization: Rob Warnock, Redwood City, CA
Lines: 34

+---------------
| 3.  Thick ethernet with cluster transceivers.  Probably the best bet...
| 
| So there are two questions.  First, have we overlooked something?
+---------------

No. I agree that clustered transceivers is a good topology. (The term I am
used to is "transceiver multiplexer".) The "bunches of grapes on a vine"
turns out to match office environments well. (Note that most [all?] ring
networks end up with this effective topology as well, with the actual "ring"
entirely inside the cluster box!)

+---------------
| Second, what sources are there for cluster transceivers?  I know about the
| DELNI, but I know I saw a cluster transceiver at Intel a few years ago that
| was made by somebody else...
| John Levine {decvax!cca | yale | cbosgd | ihnp4 | amd }!ima!johnl
| 	Levine@YALE.ARPA
+---------------

Try TCL Inc. in Santa Clara, CA. (They may have moved to larger quarters,
but area 408 directory assistance has their phone number, I'm sure.)
They make the transceivers Xerox ships, and they also make an 8-port
mux that can be stacked two levels to get 64 stations per "real" tap.
I believe that a fully-loaded 8-port unit is about $1000.

(In fact, who needs Ethernet cable?!? ;-}  )

Rob Warnock

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