> Roger,
>
> T in Base-T indicates twisted pair
> 2 in Base-2 refers to a maximum of 200 meter long segments using thin coax
> 5 in Base-5 refers to a maximum of 500 meter long segments using thick
> coax
>
> Now, if you were around in the good old days, how comes you don't remember
I'd call them the "old days", but I'm not so sure about "good". Things are
so much easier now. OTOH although the programming is easier the code to do
the same things takes 10 to 100 times as much space.
> Base-2 and Base-5? :) In computer years, those good old days were only a
> decade or two ago.
I was a sysadmin, Developmental Analyst(fancy name for programmer) and
finally a project manager, but never had to deal directly with networks.
Even as a project manager I had some one else doing that. OTOH I could count
in base 2, 8, 16 and Hexidecimal.
>
> Hmm, come to think of it, I can't remember whether coaxial LAN cable was
> 50
> or 75 ohms. Oh, well. I do remember that it was no fun chasing an
> intermittantly open BNC T-connector.
Which was usually some where inacessabile. Above the ceiling, below the
floor, in the wall, or running through cabinets. To add to the confusion we
had a plant wide TV system on the same cable. Always had to check to make
sure some one hadn't added a set of rabitt ears. <:-)) That wasn't all that
long ago either, at least in years.
I had the main system in one area but the developmental system was in
another. I'd back the running system "on-line" data files to the
developmental system so I could test new programs with real data. Then the
new programs up backed up to the running system live. It only took a
fraction of a second for the new programs to be integrated once loaded.
It dodn't take long to receive a request to "please" do that cross loading
and backup in "off peak" hours, but as we had thousands of computers and
labs that ran 24 X 7 there wasn't much difference between peak and off peak.
<:-)) I just tried to get my work to finish just before they'd do the
rolling back ups.
Thing is the running system and the developmental systems were in different
buildings. While the backups were running not much else made it through on
those particular segments. Fortunately with smart routers the traffic would
get routed around that segment.
73
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
>
> --
> Gerald Boutin, VE6WA
>
>>
>> On Jun 21, 2006, at 10:55 AM, K8RI on Tower talk wrote:
>>
>
> I'm familiar with 10 base T, 100 Base T, and gigabit used for listing
> equipment speeds. I'd just never seen it used with cable listings. I use
> Cat5e for a gigabit LAN.
>
> "In the old days" we only had to worry about fire blocks at walls and
> bulkheads. Cat5e would have never been allowed as it is hollow. It's more
> like a tube about 2/3 filled with wires. That's also one of the reasons
> the
> stuff is difficult to get around corners as the tube colapses and is
> easily
> kinked.
>
>> etc., cables. As opposed to 10base-2 which used 50-ohm coax. I
>
> I wonder why they use the nomenclature base T and base 2?
>
> Roger Halstead (K8RI and ARRL 40 year Life Member)
> N833R - World's oldest Debonair CD-2
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|