Issue 5 November 2000 
363-206-208
Equipment and Rear Access Cabling for the DDM-2000 OC-12 Multiplexer
Lucent Technologies - Proprietary
See Notice on first page
(2) Remove the front and rear covers from the DDM-2000 OC-12 shelf.
NOTE:
The covers must be installed later to assure proper air flow for cooling and fan fil-
ter alarm sensing as well as for compliance with electromagnetic interference
(EMI) requirements.
(3) Inspect the DDM-2000 OC-12 shelf for visible damage including bent or touch-
ing backplane pins.
(4) Determine the type of bay frame the DDM-2000 OC-12 shelf will mount in.
Reposition the DDM-2000 OC-12 shelf side mounting brackets, if necessary.
Refer to Figure 2-8 on page 2-55.
NOTE:
To ensure that the shelf is grounded through the bay frame, the mounting brack-
ets must be positioned so that the head of the mounting screw makes contact
with the unpainted surface of the bracket.
(5) Reposition the side mounting brackets on the heat baffle and fan shelf. Refer to
Figure 2-8 on page 2-55.
(6) If this is a DDM-2000 OC-3/OC-12 combined bay application, position the
mounting brackets on the lightguide slack storage shelf such that the distance
between the mounting brackets and the front of the shelf is similar to that of the
DDM-2000 OC-12 shelf (that is when mounted, the face of the slack storage
shelf should line up with the face of the DDM-2000 OC-12 shelf).
Equipment Installation
Description
This procedure describes how to install equipment in a bay that is accessible from both
the front and rear.
NOTE:
The special mounting screws provided with the DDM-2000 OC-12 shelves must
be used when mounting the shelves to ensure proper grounding to the frame.
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