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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).

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Need manual for wiring phones


The 612 system required 3 pairs per phone. Every 3 pairs on the 25 pair cable would be one station. A modern 6 conductor jack would be wired according to the label. If you have jacks with Green,Red,Black,Yellow,White, and Blue wires, then it's wired as follows.
W/Bl - Green
Bl/W - Red
W/Or - Black
Or/W - Yellow
W/Gr - White
Gr/W - Blue

Oct 12, 2012 | Inter-Tel (660.7600) Corded Phone

2 Answers

i have a cat5e wall plate(tph552) a cat5e wire4 colors don't match and 4 colors do ( brown,orange,blue,green,) are ok then wire has 4 that are white with (brown,orange,green,blue,)stripe. and wall plate has (red,black,yellow,white)


The wires/colors in a category 5e cable run in pairs. They should be tightly twisted together, mostly white with a blue tracer. mostly blue with a white tracer- mostly white with an orange tracer- mostly orange with a white tracer, mostly white with a green tracer- mostly green with a whte tracer, and mostly white with a brown tracer- mostly brown with a white tracer.The jack you have sounds like a standard telephone or cat. 3 jack. If the jack is being used for a standard telephone line, you'll need to connect one of the wire pairs(usually the white/blue pair) to the green and red terminals on the jack.Make sure that the same pair is also terminated at the main telephone junction.

Aug 08, 2010 | RCA Computers & Internet

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I am trying to convert old 4 prong phone jacks to modular. There are only 2 wires connected to old jack. What gets connected to the new jack and where?


The phone wire in your house ... is that what you are changing?

You probably have a red green and yellow ... ...take (probably) the red and green and put them on terminal 1 and 2 in the new box that has the RJ-11 in it ... where you will eventually plug your new phone into.

The sure teller is ... if you do this and you have a dial tone ... you are home. if there is no dial tone ... try the red and yellow ... try again ...

No go ...take the yellow and the green ...

If you are in the USA ... you will find a dial tone on two of the three wires.

If you have more modern wire ... the first pair is blue (withits buddy the blue and white) ... followed by the orange pair then the green pair. Your prinary line should be on the first pair.

If this is not the case ... please post your question again ... Please keep in mind your wires may not be configured as they originally were before telephone divestiture in 1974 ... that is why I am hedging. Since then, the phone company doesn't do anything inside the home so your sires may have been repurposed.

Thanks for your intertest in FixYa.com

May 18, 2010 | Lands Phones

1 Answer

Secondary telephone socket has 4 wires: Green, Red, Blue and White. Not sure in which of the 1 to 6 numbered terminals these wires are fed into? Please help!


If your hooking up the telephone jack for one line you would connect your line to the red/ green pair (3 and 4). If your hooking up 2 lines your second line would go on the yellow/ black pair (2 and 5). If you were hooking up a third line to the jack it would go on the white/ blue pair (1 and 6).

Apr 17, 2010 | Lands Phones

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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 has the fur standard colored wires in it that match a phone juac. The other cable has more than four wires in it. What is this extra cable of multiple wires for? Can I just cap it off and leave it in the wall? The other jack box has two cables as well that each have different colored wires in them that are candy cane striped. How do I hook these up to a phone jack? The colors of wire in the one cable are orange, blue, green and red (I think). Thanks for any advise.


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 | Lands Phones

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