Re: [SLUG] cabling question ?

From: Doug Koobs (dkoobs@dkoobs.com)
Date: Wed Dec 22 2004 - 08:36:01 EST


Mark Banschbach said:
> Greetings Sluggers..
>
> I have a cabling question for those who might have
> experience in this area. I was recently given a spool
> of leftover cable that is labled CAT-5e. It has only
> 4 wires that I can see.. unlike the standard 4 twisted
> pairs..

Mark,

Some cables have the pairs molded together, so they almost look like there is only
one wire, when in fact there is a pair. I'm not aware of any cat5e cables that only
have 4 wires.

That being said, you can make a 100BaseTX or 10BaseT ethernet cable with only 4
wires and 2 RJ-45 connectors, but it's difficult to get the wires in the right
slots. Hold the RJ-45 with the clip towards the floor, and the pins away from you.
Then, insert the wires in the 1st, 2nd, 3rd, and 6th position, and crimp. Make note
of which color goes into which position, and do the same on the other end for a
straight through cable.

Here's a page that seems to have decent pinout descriptions for 4 pairs:
http://www.ertyu.org/~steven_nikkel/ethernetcables.html
Just pretend they have only 2 pairs, green and orange, on their pictures, and that's
what you need to do.

As I said, it can be difficult to get the wires in the right pins, since you're
missing wires, but I have done it before.

Doug

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