How to repair a broken home phone cord

Written by chris baylor
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How to repair a broken home phone cord
A telephone cord with RJ-11 connectors on the ends. (phone jacks image by timur1970 from

Home telephones rely on a wired connection to a phone jack. The phone cord that connects the base to the jack uses a plastic RJ-11 connector on each end. The RJ-11 connector is similar in shape, but a little smaller than the RJ-45 connector used on the end of CAT5 computer cables. If the phone cord or an RJ-11 connector becomes damaged, a new connector can be installed with a specialised RJ-11 crimping tool.

Skill level:

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Things you need

  • Wire cutters
  • RJ-11 crimping tool
  • RJ-11 connectors
  • Telephone cord stripping tool

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  1. 1

    Cut off the damaged end of the phone cord with a pair of wire cutters.

  2. 2

    Place the newly cut end of the phone cord into a telephone cord stripping tool. Squeeze the handles of the stripper to remove the outer sheath surrounding the coloured wires inside the cord.

  3. 3

    Hold the newly stripped phone cord so that the green wire is on your right. Slide a new RJ-11 connector (with the locking clip facing upwards) onto the end of the cord.

  4. 4

    Insert the end of the connector (with the wire inserted) into a telephone connector crimping tool. Squeeze the handles of the crimping tool tightly to compress the connector onto the end of the cord. Remove the RJ-11 connector from the crimping tool.

  5. 5

    Connect one end of the phone cord to the base of the phone, and the other end to the phone jack. Lift the receiver and listen for a dial tone.

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