In the process of network cable certification, one of the best way to ensure the quality of a category 6 open cable cabling system is
to test each step of the way using Fluke Networks standards-compliant centered test plug and new DSP Patch Cord Test Adapters.
Network Cable Certification – Focusing on the Weakest Link
If you consider the entire structured cabling channel, from the PC to the switch, the weakest link is the modular plug. This is the point that has the
potential for the lowest performance. Why? Pairs get untwisted and jammed into a small space, they are crossed over each other and split, and then they are put in
parallel with flat plates. Often, mechanical crimps are used to hold the cable in the plug. These crimps can crush and deform the conductors, creating impedance
changes that contribute to Return Loss. Cords take a lot of abuse; they are pulled around desks and run over by chair wheels, stretched tight around fixtures and
flattened by heavy furniture.
Top 5 Causes of Cabling Failures: Network Cable Certification Obstacles
1. Modular plugs are not terminated properly
Use the right type of plug (stranded vs. solid conductor and follow the color code).
2. Pair-twists are not maintained
If needed, add
an additional twist to the pair when terminating the modular jack, when terminating ensure that the cutter on the termination tool is facing the right
3. Too much cable jacketing is removed
Keep the cable jacket intact up to the
connector, only remove enough jacket to terminate the pairs.
4. Poor cable routing
separation from power and other telecomm cabling as needed, do not exceed 25 lb of tension on cables being pulled, watch for cable twisting and rubs on nails,
screws, and even poorly drilled joists and studs.
5. Poor documentation
Keep good records of all
cables placed in the job including all test data, leave a copy with the owner and in the distribution center.
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