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Maintenance and Trouble Clearing
FJTU-320-515-480
4.12.3
Procedure—Installing the Optical Unit
Procedure
Step 1
Get an HC1A or MC6A unit and verify that you have the correct version for your
application:
•
HC1A-3xxx (Figure 4-31)
•
MC6A-3xxx (Figure 4-32)
•
MC6A-31xx (Figure 4-33)
•
MC6A-31xL/-31xM Issue 2, MC6A-31xS Issue 2 and later, and
MC6A-31xA (Figure 4-34)
•
MC6A-31xL, Issue 3 (Figure 4-35)
•
MC6A-31xM, Issue 3 (Figure 4-36)
Step 2
Inspect the HC1A or MC6A for damage, debris, and foreign objects.
Step 3
Go to Step 4 if replacing the MC6A-31xL/-31xM/-31xS /-31xA, OC-3 plug-in units.
If the NE is not configured this way, go to Step 5.
Ensure that the hardware option switches are set the same on the new
Step 4
MC6A-31xL/-31xM/-31xS /-31xA plug-in units as on the units being replaced. If
the unit that is to be replaced has an MR/LR switch option, this should not be
changed from factory default. Refer to the FLM 150 ADM Unit Descriptions
practice, FJTU-320-515-000, for a detailed description of the hardware option
switches and default settings used on these units.
Note: The SONET/SDH switch should not be set to SDH when the these units are used in
the FLM 150 ADM system.
Step 5
Carefully slide the HC1A or MC6A unit into the appropriate HC1A or MC6A slot
until the secondary latch engages (a little more than halfway into the slot).
Step 6
Connect optical fibers. Refer to are to be connected at the time of installation,
Section 5.1, Handling Fiber Cables.
Issue 9, May 1999
4.12: Replacing the OC-3 Optical Channel (HC1A
FNC and FNC Customer Use Only
and MC6A) Units
Vol. ll, Page 480.4-53
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