[CQ-Contest] Network cables

[Bob Naumann - N5NJ]

Andrew,

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.

73,
Bob N5NJ

----- 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
> http://www.qsl.net/zl9ci/
>
>
> 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
more
> >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/
> >> Administrative requests: cq-contest-REQUEST at contesting.com
> >>
> >>
> >
> >
> >--
> >CQ-Contest on WWW: http://lists.contesting.com/_cq-contest/
> >Administrative requests: cq-contest-REQUEST at contesting.com
> >
> >
>
>


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