NEC N8104-225 User Manual page 57

Uninstalling QSFP Module
Remove the QSFP module from the board.
IMPORTANT:
Secure the Dust covers.
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If a MPO cable is not connected, the MPO connector must be attached
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a Dust cover (MPO).
Listen for an audible clicking sound when the QSFP+ module is inserted
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into the QSFP slot
If you cannot insert the QSFP module as far as it will go, please remove
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it and then check the direction of QSFP module.
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