[ct-user] network update

[Bob Naumann - N5NJ]

Your explanation demonstrates why the twisted pair/RJ-45 /hub configuration
is much better than daisy-chaining.

With a hub, if one goes down, all the others stay on-line.

We have a hub with UTP cabling installed in the shack at V26B and have no
trouble whatsoever with noise or RFI to the network.  We have had up to 10
computers on the network with big amplifiers running on all 6 bands.  We
have more trouble keeping the RF out of the telephone line that provides our
Internet Cluster connection.

Using this topology also allows connection of laptops with Ethernet cards -
in a DX environment, this is highly desirable.


----- Original Message -----
From: "Rick Dougherty" <NQ4I@compuserve.com>
To: "CT-User" <CT-User@contesting.com>
Sent: Thursday, August 16, 2001 9:45 AM
Subject: [ct-user] network update


> Woke up at 0430 this morning and went ight to work on the network
> problem...back to basics...found the 15m and 10m computers when linked
> would communicate...ie the network cards were ok...just started adding in
> computers until I found that the cards in the 20m and 40m computers were
> toast too...they were part of the origional 6 cards that
> probably got some sort of lightning damage...just guessing it was induced
> somewhere...in any case all 6 of the origional cards are history...I had 4
> spares and they are installed and working...will get another batch (they
> are fairly cheap) and will have enough for spares for the next
time...whats
> interesting to note is that any one computer with a bad card can pull the
> whole network down...the system is daisy chained with rg-72 coax and
> terminating resistors at the two ends...it has been one of the biggest
> improvements in our multi-multi environment in the past 5 years...having a
> dependable and reliable network with an internet connection via
> DX-telnet...thanks to all who offered advice...de Rick
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