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Hardware Installation and Maintenance Guide

CloudEngine 8800, 7800, 6800, and 5800

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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).
Replacing an Optical Module

Replacing an Optical Module


Never look directly into an optical module or the ends of optical fibers. Optical modules and connected fibers emit laser radiation that can cause eye damage.

  • Use optical modules certified for Huawei data center switches. Non-certified optical modules cannot ensure transmission reliability and may affect service stability on the switch. Huawei is not liable for any problem caused by non-certified optical modules and will not fix such problems.
  • Install or remove optical fibers carefully to avoid damages to fiber connectors.
  • Optical modules are electrostatic-sensitive components; therefore, you must take ESD protection measures when replacing optical modules.
  • Do not insert an optical module reversely. If an optical module cannot be completely inserted into an optical port, do not push it with force. Turn the optical module over and try again.

Observe the following rules to replace an optical module:

  • Ensure that the new optical module has the same center wavelength and complies with the same standards as the old one.
  • After removing optical fibers from optical modules, cover the bores of optical modules with dust plugs.
  • Before removing an optical module, unplug optical fibers from the optical module. Do not apply too much force when unplugging optical fibers. Otherwise, the optical module may be damaged.

Tools and Accessories

  • ESD wrist strap or ESD gloves
  • Dust caps
  • Dust plugs
  • Alcohol swab


  1. Wear an ESD wrist strap or ESD gloves. Ensure that the ESD wrist strap is grounded and in close contact with your wrist.
  2. Record the location of the port on which the optical module to be replaced is installed, and check whether the labels on the optical fibers are correct and clear. If any labels are unclear, make and attach new labels to the cables to ensure correct fiber connection on the new optical module.
  3. Release the locking clip on the fiber connector, gently push the fiber connector, and then pull out the optical fiber. After removing optical fibers from the optical module, cover fiber connectors with dust caps.

    The locking clip varies on different fiber connectors.
    • Figure 12-1 shows the locking clips on an LC/PC connector. Hold down the locking clips when pulling the optical fibers.
    • Figure 12-2 shows the locking clip on an MPO connector. The locking clip is released automatically when you pull the MPO connector.
    Figure 12-1 LC/PC connector

    Figure 12-2 MPO connector

  4. Remove the optical module, cover the bores with dust plugs, and keep the optical module in an appropriate place for future use.

    The latch varies on different optical modules. Figure 12-3 shows an optical module with a clasp latch. To release the clasp latch, rotate it down. Figure 12-4 shows an optical module with a tab latch. The tab latch is released when you pull it.

    Figure 12-3 Optical module with a clasp latch

    Figure 12-4 Optical module with a tab latch

  5. Take out the new optical module from the package. Slowly insert the optical module into the optical port until you hear a click.

    Optical parameters of the new optical module, such as the center wavelength, transmit power, and receive power, must match those of the remote optical module.

  6. Find the optical fibers to be connected to the optical module according to labels on the optical fibers. Remove the dust caps from the fiber connectors and insert the optical fibers to bores of the optical module.

    If the optical module does not work, use an alcohol swab to wipe the fiber connectors in one direction, and then connect the optical fibers to the optical module again.

Follow-up Procedure

If the new optical module does not work, contact the equipment supplier or local maintenance personnel for technical support.

Updated: 2020-01-08

Document ID: EDOC1000036822

Views: 53630

Downloads: 3566

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