Figure 1-2: Mounting An Ons 15454 In A Rack - Cisco ONS 15454 Series Reference Manual

ONS_15454_Reference_Manual_R8.5.x_--_Shelf_and_Backplane_Hardware

Figure 1-2: Mounting an ONS 15454 in a Rack

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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.
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.
ONS 15454 Bay Assembly
The Cisco ONS 15454 bay assembly simplifies ordering and installing the ONS 15454 because it allows you
to order shelf assemblies preinstalled in a seven-foot (2.133 m) rack. The bay assembly is available in a
three- or four-shelf configuration. The three-shelf configuration includes three ONS 15454 shelf assemblies,
a prewired fuse and alarm panel, and two cable-management trays. The four-shelf configuration includes four
ONS 15454 shelf assemblies and a prewired fuse and alarm panel. You can order optional fiber channels
with either configuration. Installation procedures are included in the Unpacking and Installing the Cisco ONS
15454 Four-Shelf and Zero-Shelf Bay Assembly document that ships with the Bay Assembly,
Front Door
The Critical, Major, and Minor alarm LEDs visible through the front door indicate whether a critical, major,
or minor alarm is present anywhere on the ONS 15454. These LEDs must be visible so technicians can
quickly determine if any alarms are present on the ONS 15454 shelf or the network. You can use the LCD to
further isolate alarms. The front door (Figure 1-3) provides access to the shelf assembly, cable-management
tray, fan-tray assembly, and LCD screen.
Figure 1-3: The ONS 15454 Front Door
Figure 1-2: Mounting an ONS 15454 in a Rack 7