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From: oberman@rogue.llnl.gov
Newsgroups: comp.dcom.lans
Subject: Re: What would you suggest?
Message-ID: <1990Jul24.084548.1@rogue.llnl.gov>
Date: 24 Jul 90 15:45:48 GMT
References: <12004@rouge.usl.edu>
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Organization: Lawrence Livermore National Laboratory
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> 2) Most of our campus local nets use RG58-au wire.  Can I hook a small
> piece (75ft) of RG-59 to it with out impedence problems?   
>    Is .47 cents a foot a good price for cable?
 
Depends on how much cable you are buying, but it's not a bad price. I get it
for about .35, but that's on 5000 ft reels and with GSA discounts.

As to RG-59, DON'T DO IT! I've had a weird network problem for several weeks
where 2 systems couldn't talk to each other, but could talk to any others. It
was faster to route via some third system than it was to communicate directly.
When the problem got irritating enough I took down the segment (about 8 nodes)
and TDRed the cable. There was a funny little hitch of mismatch that turned out
to be a short piece (about 4 feet) of RG-59.

It was NOT between the two systems that didn't work, but set up reflections on
the cable that (I believe) beat with communications between these systems and
caused packet to be dropped.

					R. Kevin Oberman
					Lawrence Livermore National Laboratory
					Internet: oberman@icdc.llnl.gov
   					(415) 422-6955

Disclaimer: Don't take this too seriously. I just like to improve my typing
and probably don't really know anything useful about anything.