[lug] Cat 5e cable color codes

[D. Stimits]

Mr Viggy wrote:
> For straight RJ45 (i.e. not the back of the conenctor, the 4x2 slots), 
> if you take a male conenctor, and hold it with the spring clip down, pin 
> #1 is at the far left.  So, if you are looking head on at the female 
> connector, and the slot for the spring clip is at the bottom, pin #1 is 
> on your left.

Once I figured out that the particular hardware had two color code 
standards printed in the same place, and then figured out the 
orientation to get the right "frame of reference" relative to the proper 
color code, it went fast. A short text description such as what you have 
above would have been nice on the web site for the hardware manufacturer 
(heck, they should hire BLUG to test their hardware and web site).

D. Stimits, stimits AT idcomm.com

> 
> Viggy
> 
> PS.  I'd get an ohm meter and test that all the pins match up with the 
> proper contacts in the 4x2 array.
> 
> D. Stimits wrote:
> 
>> Big Note: This is for wiring inside the walls of the building, 
>> expecting a "straight-through" cable, so far as I can tell.
>>
>> More info, see this diagram:
>>  http://www.battlefieldlinux.com/images/NK5EMWH.jpg
>>
>> That is a poor man's gimp drawing of the perspective of the connector 
>> involved. The 8 parallel contacts marked "Front" are the female RJ45, 
>> the face view has been rotated out 90 degrees so it can be seen at the 
>> same time as the "Back" can be seen. The "Back" is a 4x2 set of 
>> self-cutting and self-locking wire contacts...the wires get stuffed 
>> into those contacts. Normal and expected wires are shown in red 
>> (internal to the one-piece plastic connector), while the yellow and 
>> orange show where two wires cross internally. I would like to use the 
>> standards of:
>> http://www.networktechinc.com/standard.html
>> http://www.networktechinc.com/images/368a-b.gif
>>
>> (specifically, the "A" standard that people are mentioning)
>>
>> However, I do not know which pin in the RJ45 is considered which pin 
>> number. And with the crossing wire at one point, I am not sure if 
>> maybe this is some strange connector. Now if I adjust for this 
>> crossing of two wires, I will *probably* be doing the right thing, but 
>> I hate to waste connectors, and worse, I hate to kill off network 
>> cards. (I really wish the connector used the same color code as the 
>> cable).
>>
>> I am about to go read the link Paule Bille is giving, it might offer 
>> more detail.
>>
>> Anyone with suggestions on how to treat that crossing of wires inside 
>> the connector? I believe I should arrange the wires to have their 
>> final effect (making allowance for the internal wire flipping) be the 
>> "A" standard from:
>> http://www.networktechinc.com/images/368a-b.gif
>>
>> D. Stimits, stimits AT idcomm.com
>>
>> Mr Viggy wrote:
>>
>>> I don't know what the diff is between the two schemes, but I do know 
>>> that sceme A is a telephone industry standard.  I wired all my jacks 
>>> according to scheme A.
>>>
>>> Basically, pait #1 is blue-wht/blue; #2 is org-wht/org; #3 is 
>>> grn-wht/grn and #4 is brn-wht/brn
>>>
>>> If you look closely at an RJ45 TP network jack, you'll notice that 
>>> only pairs one and two are used.  They are also seperated out in the 
>>> jack, why I don't know (i.e. used pins are 1, 2, 3, and 6 I think).
>>>
>>> FYI, in my house, since only two pairs are necessary for a 
>>> connection, and since none of my runs are too long, I actually broke 
>>> out the other two pairs in a couple of my wall plates (i.e. only ONE 
>>> 8 CAT5e wire runs to the plate; but I have TWO RJ45 jacks in the plate).
>>>
>>> On that connector you have, follow wiring scheme A (I did).  The 
>>> solid color boxes refer to the solid color wires; the white boxes 
>>> with the color stripe refer to the striped wires.
>>>
>>> Viggy
>>>
>>> Paul Bille wrote:
>>>
>>>> Dan > I am trying to find out recommended color-to-pin . . .
>>>>
>>>> There are two wiring schemes, 568a and 568b.  Here's another reference:
>>>> http://www.atcomservices.com/highlights/cat5notes.htm - Cat 5 Tutorial
>>>>
>>>> Paul
>>>> http://bille.cudenver.edu/author