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Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 1 Shelf and Backplane Hardware
1.2 1.2.2 Mounting a Single Node
1.2.2 Mounting a Single Node
Mounting the ONS 15454 in a rack requires a minimum of 18.5 inches (469.9 mm) of vertical rack space
and one additional inch (25.4 mm) for air flow. To ensure the mounting is secure, use two to four
#12-24 mounting screws for each side of the shelf assembly. Figure 1-2 shows the rack mounting
position for the ONS 15454.
Figure 1-2 Mounting an ONS 15454 in a Rack
Two people should install the shelf assembly; however, one person can install it using the temporary set
screws included. The shelf assembly should be empty for easier lifting. The front door can also be
removed to lighten the shelf assembly.
If you are installing the fan-tray air filter using the bottom (external) brackets provided, mount the
brackets on the bottom of the shelf assembly before installing the ONS 15454 in a rack.
1.2.3 Mounting Multiple Nodes
Most standard (Telcordia GR-63-CORE, 19-inch [482.6 mm] or 23-inch [584.2 mm]) seven-foot
(2,133 mm) racks can hold four ONS 15454 shelves and a fuse and alarm panel. However, unequal flange
racks are limited to three ONS 15454 shelves and a fuse and alarm panel or four ONS 15454 shelves and
a fuse and alarm panel from an adjacent rack.
If you are using the external (bottom) brackets to install the fan-tray air filter, you can install three shelf
assemblies in a standard seven-foot (2.133 m) rack. If you are not using the external (bottom) brackets,
you can install four shelf assemblies in a rack. The advantage to using the bottom brackets is that you
can replace the filter without removing the fan tray.
FAN FAILCRIT MAJ MIN
Equipment rack
Universal
ear mounts
(reversible)
39392