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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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Replacing an Optical Module

Replacing an Optical Module


When replacing an optical module, do not look into bores of the optical module without eye protection. The laser emitted from the bores may injure your eyes.

  • Install or remove optical fibers carefully to avoid damage to fiber connectors.
  • Optical modules are electrostatic-sensitive components; therefore, you must take ESD protective measures when replacing optical modules.
  • Do not insert an optical module backwards. If an optical module cannot be completely inserted into an optical port, do not force it into the port. Turn the optical module over and try again.

Observe the following rules to replace an optical module:

  • Wear an ESD wrist strap or ESD gloves when replacing the optical module.
  • Ensure that the new optical module has the same center wavelength and complies with the same standards as the old one.
  • 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.
  • After removing optical fibers from optical modules, cover the ports of cards and bores of optical modules with dust plugs.

Tools and Accessories

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


  1. Wear an ESD wrist strap or a pair of ESD gloves. When wearing an ESD wrist strap, insert the other end in the ESD jack of a device and ensure that the device is reliably grounded.
  2. Record optical fiber locations on the old optical module and check whether the labels on the optical fibers are correct and legible. If any labels are illegible, 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 13-11 shows the locking clips on an LC/PC connector. Hold down the locking clips when pulling the optical fibers. Figure 13-12 shows the locking clip on an MPO connector. The locking clip is released automatically when you pull the MPO connector.

    Figure 13-11 LC/PC connector

    Figure 13-12 MPO connector

  4. Release the latch of the optical module, gently push the optical module, and then pull it out. Cover the bores of the optical module with dust plugs.

    The latch varies on different optical modules. Figure 13-13 shows an optical module with a clasp latch. To release the clasp latch, rotate it down. Figure 13-14 shows an optical module with a tab latch. The tab latch is released when you pull it.

    Figure 13-13 Optical module with a clasp latch

    Figure 13-14 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.

    The new optical module must have the same optical parameters as the remote optical module connected to it.

  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.

Updated: 2019-11-30

Document ID: EDOC1000069460

Views: 45700

Downloads: 960

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