Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bionet!ames!lll-winken!uunet!ncrlnk!ncr-sd!hp-sdd!hplabs!hpfcdc!hpldola!hp-lsd!col!bdale
From: bdale@col.hp.com (Bdale Garbee)
Newsgroups: comp.sys.hp
Subject: Re: Experience sought with large HP 9000 clusters
Message-ID: <2220006@col.hp.com>
Date: 13 Jul 89 22:19:47 GMT
References: <3517@cps3xx.UUCP>
Organization: HP Colorado Springs Division
Lines: 13

>You might have physical problems with the LAN cable.  Each connector
>causes attenuation, so the signal-to-noise may be pretty low at the end.
>Avoid using barrel connectors for splicing - just use a longer cable.

This is usually only a problem in practice if you use prefabbed cables, which
frequently are junk.  We buy high-quality coax, and crimp-on BNC connectors
that fit, and we've got runs that are pushing the length limits for thin
cable with a *lot* BNC connectors (at least one per cubicle down a long row,
for example)... it has a *lot* to do with how carefully you fab the
cables, etc.  We typically TDR new strands to look at the impedance down the
line... if you have the gear...

Bdale