Terminating Cat 6 Cable

Updated April 17, 2017

Ethernet network infrastructure typically consists of network switches, routers and firewalls interconnected via Category 5 or 6 cabling or fibre cable. Category 6 cable (also referred to as CAT6 cable) is the most cost-effective medium to use for local area networks designed to support gigabit speeds. CAT6 cable can be installed in a building and then terminated directly to network equipment such as a switch or router; however, terminating to a punchdown block offers greater flexibility and more efficient cable management. Terminate CAT6 infrastructure cables using punchdown blocks to ensure best network performance and flexibility.

Strip two inches of the sheath from one end of the CAT6 cable using the wire stripping tool. Untwist one inch of each pair of wire strands.

Insert the wire strands into the 110 punchdown block from left to right in the following order:

Pin 1 White/Blue wire

Pin 2 Blue wire

Pin 3 White/Orange wire

Pin 4 Orange wire

Pin 5 White/Green wire

Pin 6 Green wire

Pin 7 White/Brown wire

Pin 8 Brown wire

Note that the ends of the CAT6 wires will protrude beyond the punchdown terminal.

Press each wire into the punchdown block using the punchdown tool so that the "Cut" or "Cutter" blade is oriented toward the wires being punched down. The punchdown tool will press the wire into the block terminal and cut the excess wire protruding from the punchdown terminal.

Repeat the punchdown procedure for the second CAT6 cable in order to secure the cable to the connecting terminal in the punchdown block.


Each pair of wires should maintain twists as close to the punchdown block as possible to minimise cross-talk interference with network data transmissions.

Things You'll Need

  • 110 punchdown block
  • Punchdown tool with 110 blade
  • Two CAT6 cables
  • Wire stripping tool
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About the Author

Dave Wilson has been writing technical articles since 1993, including manuals, instructional "how-to" tips and online publications with various websites. Wilson holds a Bachelor of Arts in psychology from the University of California, Los Angeles and has Microsoft, Cisco, and ISC2 (CISSP) technical certifications. He also has experience with a broad range of computer platforms, embedded systems, network appliances and Linux.