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S12700 and S12700E Series Agile Switches Hardware Installation and Component Replacement

This document describes hardware installation procedures of the S12700 series switches, troubleshooting methods for common hardware faults, and switch maintenance instructions.

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Cable Assembly Precautions

Cable Assembly Precautions

Checking the Appearance of Cables

  • If the cable jacket or insulation is visibly dirty, clean it before assembly.
  • If the jacket or insulation of a cable has visible damage, irreparable scuffing, or other defects, do not use the cable.
  • If the shield layer of a cable is damaged, do not use the cable.
  • If the cable jacket or insulation cracks after the cable is bent or twisted, discard this cable and check whether other cables have the same problem. If other cables have the same problem, replace these cables.

Checking the Appearance of Connectors

  • Do not use connectors with visible defects, damage, rust or scuffing.
  • Do not use connectors if their shells or pins have exposed part or uneven plating, or their pins are lost, broken, or bent.
  • Do not use connectors that have dirt on their pins or in their jacks or if there are conductors between pins or between pins and the shell.

Precautions for Assembly

  • Use dedicated tools or tools delivered by Huawei and follow the methods given here during assembly.
  • Hold terminals of cables instead of pulling the cables themselves when installing or removing cable components.
  • Take the following precautions when cutting or stripping cables:
    • Make cables slightly longer than necessary.
    • Coil cables longer than 2 m (6.56 ft) after cutting. Bind and fasten the coils using bundling ropes. The inner diameters of the coils should be larger than 20 times the outer diameters of the cables.
    • When stripping the jackets of cables, avoid damaging the shield layers (braid or aluminum foil), insulation, core conductors, and other jackets that do not need to be stripped.
    • After assembling cables, cut all visible cross sections of jackets to ensure that the cross sections are arranged neatly.
    • Do not touch the core conductors of cables with your hands. Terminate exposed conductors in a timely way after stripping off insulation so that the surface of the conductors does not become oxidized.
  • Take the following precautions when crimping and connecting cables or connectors:
    • The terminals and conductors should be connected tightly after they are crimped. They should not be moved or turned.
    • Cut all the exposed copper wires.
    • Try to avoid a second crimping of sleeves.
    • Keep all the conductors clean and aligned.

The connectors, cables, and tools provided by different vendors may be different. The figures in this document are for your reference only.

Updated: 2019-11-30

Document ID: EDOC1000069460

Views: 45571

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