How to Use a Telephone Punch Down Block Tool

Written by nick rider
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If you are an IT or telephony professional in a medium to large office environment, your data and telephony wiring infrastructure is most likely centralised in one area. Your telephone system connects to a series of wiring blocks which connect the voice data to the different telephone jacks around your office. These blocks are commonly called 66 blocks and require a special tool to seat and terminate the small telephone wires. It's a spring-driven impact tool called a punch down tool.

Skill level:
Moderately Easy

Things you need

  • Punch down tool with a 66 punch blade
  • 66 block
  • Telephony wire to make the connection

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  1. 1

    Separate the twisted pair of telephony wire into two separate strands about two inches from the casing.

  2. 2

    Bend the ends of both strands so they're not straight. This will help the wires stay in place on the terminators before seating.

  3. 3

    Insert the wires into the mouths of the connection pair's terminators at the bend. Make sure the proper wire is in the proper connection pair terminator.

  4. 4

    Ensure that the tool's punch down blade is facing the end of the wire and insert the blade head over one of the terminators. Press the tool against the 66 block in a quick, sharp motion to seat the wire and cut off the extra length at the end. Repeat with the wire in the other terminator.

Tips and warnings

  • Keep a pair of needle nose pliers handy in case you need to unseat a poorly terminated wire.

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