Procedure: Replace The Hub Filter Module In The Passive Optical Shelf - Cisco ONS 15200 Handbook

Removing and Replacing an HFM
Close the passive optical shelf cover.
Step 17

Procedure: Replace the Hub Filter Module in the Passive Optical Shelf

Do not look directly at the optical connector output beams during connector removal. The beams
Warning
can cause permanent eye damage.
Open the passive optical shelf cover.
Step 1
Remove two or three DFM modules to create more work space.
Step 2
Remove the optical fiber jumper connector at the adjacent HFM (to the left on the A side or to the right
Step 3
on the B side).
Cap the optical fiber ends.
Step 4
Slide in the new HFM, making sure there is interlock between the rear-mounted crossbeam in the MCU
Step 5
and the groove in the bottom of the HFM.
Press at the bottom of the new HFM, applying downward pressure, and snap into place.
Step 6
Disconnect the duplex MU connector that is installed on the new HFM. The duplex connector is on the
Step 7
optical fiber jumper cable that protrudes from the new HFM.
Clean the optical fiber MU duplex connector
Step 8
Connect the duplex MU connector to the adjacent HFM.
Step 9
After removing the fiber caps, clean the disconnected optical fiber ends removed in Step 3.
Step 10
Connect the duplex MU connector of step 3-10 to the HFM being installed. The duplex connector is on
Step 11
the optical fiber jumper cable that protrudes from the adjacent HFM.
Remove the dust plugs from the second MU-MU adapter located on the HFM.
Step 12
Uncap the duplex MU connector of the associated NAM.
Step 13
Inspect the optical fiber connector and clean the optical fiber connector.
Step 14
Connect the duplex MU connector from the NAM to the HFM.
Step 15
Push the HFM slightly upward (about 10 mm / 0.5 inch) to expose two grooves on the top of the HFM.
Step 16
Position the optical fiber (at the correct length and bending radius) in the two lateral grooves on top of
Step 17
the HFM.
Press the bottom of the HFM, applying downward pressure and snap carefully into place.
Step 18
For a protected channel, repeat steps 12-17 for the other side.
Step 19
Check that the fibers on top of the passive optical shelf are drawn in even curves without tight loops or
Step 20
kinks.
Close the passive optical shelf cover.
Step 21
Cisco ONS 15200 Module Handbook
8-6
Chapter 8 Hub Filter Module
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