[CQ-Contest] Network cables
Bob Naumann - N5NJ
n5nj at gte.net
Mon Sep 24 08:02:35 EDT 2001
You're correct if you're assuming that the computer that fails does not
"lock up" the network via its' network card.
(Ask NQ4I about this phenomena.)
I've found that often, a computer locking up on a coax network does fail in
a manner that prevents the rest of the computers from operating - until you
disconnect that T connector from the back of the computer.
One would hope that all computers would be reliable enough to get through a
weekend of contesting.
Hopefully the hub would be able to make it through as well.
As I said, there's really no advantage one way or the other.
----- Original Message -----
From: "andrew" <andrew at gi0nwg.freeserve.co.uk>
To: "Bob Naumann - N5NJ" <n5nj at gte.net>
Cc: <cq-contest at contesting.com>
Sent: Monday, September 24, 2001 6:53 AM
Subject: Re: [CQ-Contest] Network cables
> With coax, if one of the *computers* dies, it does NOT impact the
> network. I can quite easily disconnect the BNC T-piece from the network
> card of one of the machines (to simulate a dead machine) and the network
> for the other machines continues normally. If one of the coax cables
> gets cut or damaged, that will severely impact the entire network as the
> link is cut and the two sectors that we now have are not terminated
> properly at each end.
> With CAT5 (twisted pair) a cut cable would only impact that one machine.
> Then again, if a hub were to die on a CAT5 network, you lose that entire
> network segment, which for most hams would be the entire network......
> Basically, take your pick, though BNC type network cards and RG58 coax
> are cheaper in this country (they nearly give the BNC cards away) and
> I've had zero RF problems with them.
> Andrew Williamson GI0NWG / AC6WI
> Homepage = http://www.gi0nwg.freeserve.co.uk/
> One of the ZL9CI gang
> In message <002601c14497$010d8be0$3f502104 at vz.dsl.genuity.net>, Bob
> Naumann - N5NJ <n5nj at gte.net> writes
> >There is no advantage one way or the other (twisted pair/coax) aside from
> >the fact that if you use twisted pair and a hub, if one of your computers
> >goes out it does not impact the others as it would with coax which is a
> >"daisy-chain" configuration.
> >Regarding 100 vs. 10mb - the 10 mb is more economical and is certainly
> >than enough for a home lan environment.
> >----- Original Message -----
> >From: "tony field" <ve6yp at shaw.ca>
> >To: <cq-contest at contesting.com>
> >Sent: Sunday, September 23, 2001 6:12 PM
> >Subject: [CQ-Contest] Network cables
> >> Considering the relatively high level of
> >> RF energy used in ham radio,
> >> is there any advantage / disadvangage of
> >> using twisted pair cable or coax within
> >> a contest station (or a normal home ham
> >> radio network)
> >> If twisted pair is used, is there any problem
> >> with 100mbps vs. 10mbps network speed?
> >> tony (ve6yp)
> >> --
> >> CQ-Contest on WWW: http://lists.contesting.com/_cq-contest/
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