How to Use a Cat5e Wiring Diagram for a Telephone

Written by raul avenir
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How to Use a Cat5e Wiring Diagram for a Telephone
Cat-5e network cables can be used to wire a telephone. (Jupiterimages/Polka Dot/Getty Images)

Category 5e, or Cat-5e, cables consist of eight 24-gauge AWG-standard copper wires that are twisted together in pairs. This type of network cable is rated at 350 megahertz (MHz) and it is the improved version of a Cat-5 cable which preceded it; the "e" stands for enhanced. Cat-5e cables can be used to wire telephone lines. Know how the wiring is done to be able to use this kind of cable for your telephone line.

Skill level:
Moderate

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Things you need

  • Diagonal pliers
  • Wire stripper
  • Cable staples
  • Screwdriver
  • RJ-14 telephone jack (surface mount)

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Instructions

  1. 1

    Open the network interface device (NID), a plastic box placed by the telephone company on a wall just outside your home. Look inside the NID for the short wire plugged into a telephone jack; unplug the wire. Slip a Cat-5e cable through an opening at the base of the NID and pull the cable out from inside the NID by about 6 inches.

  2. 2

    Remove 2 inches from the outer covering at the tip of the cable, using diagonal pliers. Strip off 1/2 inch of insulation from the tip of the white wire with blue marking and from the tip of the blue wire with white marking using a wire stripper. Loosen the red and green terminal screws inside the NID using a screwdriver. Hook the white wire with blue marking to the green terminal screw, and the blue wire with the white marking to the red terminal screw beside the short wire inside the NID. Tighten the screws to secure each connection.

  3. 3

    Mount the RJ-14 telephone jack on the wall next to the spot where you intend to sit a telephone. Run the telephone cable along walls or inside ceilings from the NID to the RJ-14 telephone jack and cut the cable after about 6 inches from the jack. Do not place the cable alongside power lines to prevent interference. Use cable staples every foot along the way to fasten the cable onto surfaces.

  4. 4

    Remove 2 inches from the outer covering at the tip of the cable. Strip off 1/2 inch of insulation from the tip of the white wire with blue marking and from the tip of the blue wire with white marking. Loosen the red and green terminal screws inside the jack. Hook the white wire with blue marking clockwise around the green terminal screw and hook the blue wire with the white marking around the red terminal screw. Tighten both screws to secure each connection.

  5. 5

    Plug the short wire inside the NID back into its jack. Plug a telephone into the newly installed RJ-14 wall jack. Lift the phone handset and place a call to test the connection.

Tips and warnings

  • Unplugging the short wire inside the NID discontinues power to the telephone wires inside your home.

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