1-5
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 1 Shelf Assembly Hardware
1.2.2 Mounting a Single Node
1.2.2 Mounting a Single Node
Mounting the ONS 15454 ANSI shelf 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 ANSI shelf.
Figure 1-2 Mounting an ONS 15454 ANSI Shelf 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.
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-m) racks can hold four ONS 15454 ANSI shelves and a fuse and alarm panel. However, unequal
flange racks are limited to three ONS 15454 ANSI shelves and a fuse and alarm panel, or four
ONS 15454 ANSI shelves using 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 of using the bottom brackets is that you
can replace the filter without removing the fan tray.
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Equipment rack
Universal
ear mounts
(reversible)
39392
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