Patch cables for 1000BaseT Cat{5,5E}?

Archived from groups: comp.dcom.lans.ethernet (More info?)

J. Clarke <jclarke@nospam.invalid> wrote:
> 1000T is designed to run on CAT5, but 5E was designed around
> the standard.

Fully agreed. I think the difference that gets the -E is
an ACR and alienXT spec. Almost all Cat5 installs meet 5e.

> It's actually been run on barbed wire in a demonstration
> (don't try this at home), so it's a lot more robust than
> is generally realized.

??? I'd heard of 10baseT running over barbed wire, but
not 100baseTX or 1000baseT. The barbs will act like chokes

> That said, if you have a vendor charging 40% more for
> CAT5E than for CAT5 patch cables they're gouging--

Or inventory clearance. I can't see there being much
difference between Cat5 & -5e patchcords. Yes, the cable
will be 5e rated. Alien XT is irrelevant for patch, and the
attenuation difference can't be significant.

-- Robert

Archived from groups: comp.dcom.lans.ethernet (More info?)

William P.N. Smith@nirgendwo wrote:


> Cat5E patch cables are almost 40% more than Cat5 at the particular
> vendor I'm looking at, does 1000BaseT require Cat5e or is Cat5 good
> enough?

> Thanks!

CAT5E spec was developed specifically to support 1000BASE-T, so I would
not attempt to save 40% by rendering your cabling system useless or
slow-moving.

Actually, CAT5 vs. CAT5E is not even the point here. CAT5E was ratified as
a standard back in 1999. Now, in 2004, there is no practical reason for a
decent manufacturer to continue to make old CAT5 stuff that was removed
from the standard. Therefore anyone still using the CAT5 designation
(without "E" ) is just trying to mask the fact that this is either an old
stock or just a poor quality part that did not make it through the CAT5E
test. While there might be nothing wrong with an old stock CAT5 part from
a decent manufacturer (in fact, it may very well pass CAT5E test), I would
stay far away from any recent part that is still marked "CAT5" (without
"E" ).

--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
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premises cabling users and pros
http://www.cabling-design.com/homecabling
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