I'm sure you'll get lots of replies, but I'm replying too because this site
has a particularly good set of graphics:
http://www.k12.hi.us/~tethree/96-97/course2/RJ45diagram.html
You probably want to use TIA/EIA 568B, which simplifies things with telco
patch panels.
Then if you have a cable with one 568A end (obvious if you look at them) you
automatically know it's a crossover cable. (One end 568B and one end 568A
equals crossover.)
For reference, print that page out on a color printer and put it up on the
wall. Besides being a good reference, it makes a nifty poster. :-)
(I'm thinking of finding somebody with an 11" x 17" color printer for mine.)
Assuming you're looking at the side of the connector WITHOUT the little tab,
568B wiring is:
white-orange
orange
white-green
blue
white-blue
green
white-brown
brown
Only 4 wires matter for ethernet (the orange and green pairs) but you should
always wire it properly anyway.
The wires that matter for token ring, BTW, are the green and blue pairs.
It's always ticked me off that it isn't the blue and brown, because then an
ethernet crossover cable would work as a normal token ring cable, but as it
stands an ethernet crossover just doesn't do anything with token ring. You
can't crossover token ring. :-(
For 568A, you just swap the orange and green. Thus:
white-green
green
white-orange
blue
white-blue
orange
white-brown
brown
As I said, if you make one side 568B and one side 568A, you have a crossover
cable.
Invest in a GOOD crimper. It's worth the extra money in terms of
aggravation and troubleshooting time.
A lot of diagrams and instructions look at it from the side WITH the tab.
So if you're making a cable, pay attention to which way the directions
you're using run! In fact, that URL I refer you to above shows it from the
tab side. Pick one way, and always do it that way. If you do, in no time
at all you'll have this memorized, trust me.
Oh; some instructions will say "white-orange and orange-white" and so on for
all the wires. "white-orange" is obvious, it's a white wire with a thin
orange stripe around it. "orange-white" is an orange wire with a thin white
stripe. It's so thin, you often can't see there's any white at all. And
some wire doesn't have the white stripes at all. Just remember that the
first word is the important one, if confronted with one of these confusing
sets of documentation.
-----Original Message-----
From: Rob Goodwin <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Monday, May 04, 1998 5:01 PM
Subject: Totally off topic: RJ45 fab
>Sorry this is off topic. Does anyone know where I can find the color order
>for fabricating my own RJ45 patch cable. I've got the tools and parts.
>Just don't know what order to put them in. Is there a site out there
>somebody knows of?
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