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Phone socket i have an old BT box which has white blue red green yellow black wires in it i want to replace it with a new one but the colour code has changed has changed.the new diagram tells me which colour goes in what number but the new colours dont match mine there now green or green/white,blue or blue /white orange or orange/white,white or white/orange,white or white/blue,white or white/green please can you help

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I found some good information on this site: http://www.ling.upenn.edu/~kurisuto/phone_wiring.html.

He lists that the old style wire has become obsolete, and shows a diagram of how they line up to the new style.

Posted on Jun 17, 2008

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Phone Jack Wiring Problem


Your apartment is wired for two lines but you are using only one of the two. Your phone jack has red and green terminals for one line and yellow and black terminals for the other (old color codes). The four wires coming in to your apartment are actually two lines: orange/white and white/orange plus blue/white and white/blue (new color codes). One of those lines is active. Connect the orange/white wire to the red terminal and the white/orange wire to the green terminal. Plug in your phone and listen for a dial tone. If no tone, disconnect the first line and connect the second pair of wires. Listen again. DO NOT CONNECT ANY WIRES TOGETHER. Just follow the steps above. If you still don't get results, the phone company may not have activated your connection

Dec 30, 2012 | Phones

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Telephone jack wiring


Most cheap jacks have 4 wires, red, green, yellow & black. Most modern houses have wires paired up (twisted pair) like blue & white with blue line or stripe. Line 1 is red/green or blue/white. Line 2 is yellow/black or orange/white(with orange line/stripe).

on Feb 21, 2015 | Phones

1 Answer

I'm installing 2 phone jacks in my newly remodeled home. We are supposed to have one phone line. Each of the boxes with phone wires in them has two cables coming out of it. In the first box, the one cable...


Pity that whoever did your remodel didn't give you a floor plan. In new construction, we make everything go to a central point. Old style was to loop everything through. It would be easy to tell, because you'd see the loops.

If you want to do this yourself, and save some money, give this a try.
The color code is that the green/red/black/yellow go to the jack. Hook all 4 wires (8 because you're going to hook both cables together to a jack) to the jack. Then, down the road, when someone has to add a second line they won't have to open this back up again. When it comes to the paired cable, look at the wires. One of the wires has more white than blue (White/Blue lead) and one has more Blue that white (blue/white lead) and so forth. You're going to be working with the blue pairs and the orange pairs, and spare out the green and brown pairs.

Strip the 4 remaining wires (the ends so they can go on the screw terminals) and connect them as follows:

White/Blue to Green Blue/White to Red White/Orange to Black Orange/White to Yellow.

If you're using Insulation displacement jack (the kind with caps where you push the wires into the slots), STOP! You're going to need more parts.

Mar 31, 2010 | Phones

1 Answer

I need the color code for phone cables. 25 pair up to 1800 pair. I need to splice it.


white/blue
white orange
white green
white brown
white slate
red blue
red orange
red green
red brown
red slate
black blue
black orange
black green
black brown
black slate
yellow blue
yellow orange
yellow green
yellow brown
yellow slate
violet blue
violet orange
violet green
violet brown
violet slate
**Keep all pairs together and you should be fine***

Feb 22, 2010 | Phones

1 Answer

How do i connect a telephone wire to an rj11 plug. What is the order of the wires for us telephones.


dialtone should go on the green and red wires of the jack for 1 line service, yellow and black for a second line.
Depending on the type of wiring that your dealing with the color code can change. if your wiring has white wires with little dashes of color on them then the code is:
green = white/blue (mostly white with blue dashes)
red = blue/white (mostly blue with white dashes)
black= white/orange (mostly white with orange dashes)
yellow= orange/white (mostly orange with white dashes)

Oct 23, 2009 | Phones

1 Answer

Replaceing phone wall plate


Hi Leanne!

Normally the conductors in phone cable are colored green, red, black and yellow in older style wiring. Green and red are used for a single line, and black and yellow are for a second line. Newer systems use wires that have conductors twisted together in pairs. White with a blue stripe paired with solid blue or blue with a white stripe is line 1. White with an orange stripe paired with solid orange or orange with a white stripe is line 2. (At least this is true in the US. You said "cheers" so maybe you're not in the US and the color coding's different.)

Chances are your line is using the blue and white wires.Residential telephone equipment isn't polarity sensitive so it really doesn't matter which wire you hook to L+ and L-. Try the white/blue combination first. If you don't get dialtone then try red/black. If still no luck you only have two more combinations to try.

Before you start with the wiring, take another phone on the line off the hook (if you have another one). This will prevent an incoming call from ringing the line, which can give a shock if you happen to be touching a bare end. The ringing voltage is much higher than the normal phone line voltage which won't bother you.

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1 Answer

No service


What color wires were there ???
What kind of jack, a new one that had...
white blue/blue
white orange/orange
white green/ green
white brown/brown
?????

If so, the white/white blue would go to the same wires.
If you had red/green and black/yellow, the red/green should go to the white blue/blue.

Jan 13, 2009 | Phones

1 Answer

How do I wire an extension phone socket that has 4 wires?


Red and green would be on the center 2 pins (4, 5). White and Blue would go outside of that (3, 6)

Jan 11, 2009 | Phones

1 Answer

Phone line/phone jack problem


The wiring on the jacks is set up for a 2 line phone.

If you take the jacks apart, you will see either:
A) red, green, and black, yellow
B)white blue/blue white and white orange/orange white

You need to swap the pairs.
If there are red/green/black/yellow wires. remove the yellow/black and move them to where the red/greens are. Then put the red/green wires, where the yellow/black used to be.

OR, you need to swap the orange and the blue wires.

Dec 22, 2007 | Phones

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