HP3000-L Archives

August 1996, Week 3

HP3000-L@RAVEN.UTC.EDU

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From:
karl knapp <[log in to unmask]>
Reply To:
karl knapp <[log in to unmask]>
Date:
Tue, 20 Aug 1996 10:02:24 PST
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     -----scott wrote------
use with "Thinlan" or "Cheapernet" networks.  The right stuff is
RG58A/U or RG58C/U.  There are also some Belden cable types with
 
     Thank you for the clarification.
 
There are two limitations to how long a Thinlan network can be.  One is
electrical, the other is a timing limitation imposed by the minimum
length of an Ethernet/802.3 frame and the speed of light (actually the
speed of electrical impulses in coax cable which is about 2/3 the speed
of light).  For Thinlan networks, things will usually quit working
before you have problems because of the timing limitations, so the real
limit has to do with the number and types of devices on the cable, and
the length and quality of the cable you are using.  Better shielded,
higher quality cable will let you run significantly farther before you
run into problems.
 
     I was unable to find the exact spec on the net, but I finally found it
     in my <plug>Black Box catalog(1-800-552-6816)<end plug>.
 
     Their version of the spec is as follows:
 
     10Base2(ThinNet)
     maximum of 607 feet or 185 meters per segment
     minimum cable distance between T-connectors is 1.6 feet or .5 meters
     maximum of 30 connections per segment

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