3-4
Issue 9 October 1998
363-206-204
Equipment and Front Access Cable Installation
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. Cable access space must be provided between every other shelf. Refer
to the bay layout shown in Figure 3-5.
A heat baffle is required below the DDM-2000 OC-3 if 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
.
Front access cables of odd-numbered shelves should be to the front below the
shelf, and even-numbered shelves should be to the front above the heat baffle and
above the shelf. Refer to Figure 3-5.
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
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