Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!rutgers!ucsd!net1!madden
From: madden@net1.ucsd.edu (Jim Madden)
Newsgroups: comp.dcom.lans
Subject: CATV data networking question
Keywords: CATV broadband bridge applitek ethernet
Message-ID: <1422@ucsd.EDU>
Date: 28 Jan 89 12:33:17 GMT
Sender: nobody@ucsd.EDU
Reply-To: madden@ucsd.edu (Jim Madden)
Distribution: all
Organization: UCSD Network Operations Group
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UCSD has an extensive broadband cable plant that it uses for terminal
connections and as a general purpose ethernet backbone.  We are now
thinking about attaching new high volume applications to the existing
plant and are interested in recommendations and experiences of others
with 5 to 10 megabit per second CATV compatible data distribution
products such as Applitek's Unilan and Unibridge, Bridge ethernet
filters and TCP/IP routers, various MAP/TOP implementations, and
ethernet over broadband.  We are particularly interested in comments
about Applitek equipment and it's ability to use a single 6 Mhz.
channel pair and coexist on the same cable plant in channels near
broadcast television or other data distribution services.


We solicit any other reasonable comments about the project as well.
Our immediate need is to connect 10 to 15 TCP/IP workstations in 5
buildings on three different cable legs each of which is about 1,500
meters long.  The workstations will use a network file system
remote/procedure application that requires them to exchange data among
themselves nearly constantly at an aggregate rate of 500,000 bytes per
second over several hours at a time.  Our current thoughts are that the
workstations within each building will be on an isolated ethernet and
that the ethernets will be linked together throught the CATV plant via
either 802.3 filtering repeaters, although we might instead choose
TCP/IP routers to improve building isolation.

Any comments?

Jim Madden
UCSD Network Operations
madden@ucsd.edu
ucsd!madden
Jim Madden
UCSD Academic Network Operations, (619)534-2682
madden@ucsd.edu
..!ucsd!madden