Huawei DBS3900 WiMAX Maintenance Manual page 24

5 Replacing the Optical Modules
Step 2 Turn the ring-pull on the faulty optical module outwards. Hold the ring-pull and take the faulty
optical module out of the slot to remove it from the BTS3702E.
Step 3 Install the new optical modules in the BTS3702E.
Step 4 Connect the optical fiber connectors to the new optical modules.
Step 5 Check whether the transmission signal is recovered according to the indicators.
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Postrequisite
Contact the local Huawei office to handle the faulty optical modules.
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DBS3900 WiMAX
Site Maintenance Guide (Draft)
Issue 01 (2009-11-30)