How do I Wire a Cat 3 to an RJ14 Connector?

Written by raul avenir
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How do I Wire a Cat 3 to an RJ14 Connector?
Use Cat-3 cable to wire your residential phone line (telephone old image by pavel siamionov from

Category-3, also known as "Cat-3," is a type of network cable that was popularly used in the early 1990s, but since the early 2000s most new structured cable installations are built with Cat 5e or Cat 6 cable. Cat-3 is currently still in use in two-line telephone systems. Cat-3 cable has colour-coded wires that terminate with RJ-14 jack. RJ-14 jacks accommodate RJ-14 connectors connected to telephone patch cords. Learn to wire your residential phone line using Cat-3 cables that terminate with RJ-14 jacks.

Skill level:

Things you need

  • Screwdrivers
  • RJ-14 surface mount jack
  • Wire stripper
  • Diagonal pliers
  • Network cable stripper

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  1. 1

    Unplug the modular connector inside the telephone interface box mounted by your telephone service provider on a wall outside your home. Unplugging it will disconnect the power and signals coming from the telephone company and make it safe for you to work on the phone lines.

  2. 2

    Hold the Cat-3 cable and pull it slowly out of the telephone outlet box on your wall. Remove at least two inches from the cover at the end of the cable by carefully cutting it using a pair of diagonal pliers. Avoid damaging or cutting any of the wires inside.

  3. 3

    Remove or strip away half an inch from the insulation of the blue wire with white stripe, white wire with blue stripe, orange wire with white stripe, and white wire with orange stripe using a wire stripper.

  4. 4

    Get an RJ-14 surface mount jack and unscrew or unsnap its cover to open it. Look at the terminal screws inside and loosen each screw by turning it counter-clockwise using a screwdriver. Hook each wire clockwise around its corresponding terminal screw as follows:

    Blue wire with white stripe to red terminal screw (Line 1);

    White wire with blue stripe to green terminal screw (Line 1);

    Orange wire with white to yellow terminal screw (Line 2);

    White wire with orange to black terminal screw (Line 2).

  5. 5

    Turn each terminal screw clockwise to tighten it and secure the connection. Place the jack onto a wall by attaching it with screws or mounting tape, and then replace its cover. Go back to the telephone interface box outside your house and replug the modular connector inside to resume power and signals from the telephone company. Plug a phone into the new jack and listen for a dial tone.

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