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.
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 direction.
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
Keep cable 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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