Lucent Technologies DDM-2000 OC-3 Installation Manual

2-4
Issue 9 October 1998
363-206-204
Equipment and Rear Access Cable Installation
a. Mounted in network bay frame. The recommended network bay frames are
the ED-8C500 and the ED-8C501 (rear access only). Refer to Figure 2-5
and Figure 2-6 for DDM-2000 OC-3 shelf placement in a network bay
frame.
b. Mounted in seismic network bayframe. The ED-8C800-500 and
ED-8C801-501 seismic network bay frames are designed for use in all
earthquake zones, and in general, do not require top support at the 7-foot
level. These frames meet Pacific Bell Equipment Framework Standard
PBS-000-102PT. Shelf arrangements may be different for these bays. See
ED-8C724-10 and ED-8C727-10 for OC-3 and OC-12 bay drawings
respectively.
c. Miscellaneously mounted. However, OC-3 shelf mounting must meet
requirements described in Section 2 under "Equipment Installation Consid-
erations".
Equipment Installation Considerations
Detailed network bay frame installation information is contained in ED-8C724-10,
Typical Bay Arrangements. The information in this part is of a general nature.
The equipment listed below has the following height dimensions:
If the DDM-2000 OC-3 is installed at the bottom of the bay frame, there should be
an air gap of at least 1.25 inches below the DDM-2000 OC-3.
A heat baffle or fan shelf is required between each pair of DDM-2000 OC-3
shelves as described below. If the DDM-2000 OC-3 is being installed at the top of
a 7-foot bay frame, a heat baffle or fan shelf is not required above the sixth (top)
shelf.
A heat baffle is not required below the DDM-2000 OC-3 unless heat-generating
equipment is located below the DDM-2000 OC-3.
DDM-2000 heat baffles must be used where required. There is no equivalent air
gap.
A DDM-2000 OC-3 fan shelf is required
only
if the DDM-2000 shelf is installed in
non-NEBS environments
(air inlet temperature exceeding 50 degrees Celsius see
Bellcore TR-64 Iss. 4). The DDM-2000 fan shelf, ED-8C733-30, G7, provides
forced air cooling for DDM-2000 shelves that are bay mounted in a
non-NEBS
environment
.
A fan shelf, when required, mounts between each two DDM-2000 OC-3 shelves in
place of a heat baffle (Figure 2-7). No air gaps should exist between fan shelf and
OC-3 shelf to ensure proper cooling.
ED-8C724-30, G4 DDM-2000 OC-3 Shelf 9.0 inches
ED-8C733-30, G1 Heat Baffle 4.0 inches
ED-8C733-30, G7 DDM-2000 OC-3 Fan Shelf 4.0 inches

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English