Procedure: Mount The Shelf Assembly In A Rack (Two People); Mounting Multiple Nodes; Procedure: Mount Multiple Shelf Assemblies In A Rack; Four Node Configuration - Cisco 15454-TCC - Network Processor Card Operation Manual

Chapter 1 Hardware Installation

Procedure: Mount the Shelf Assembly in a Rack (Two People)

Step 1 Ensure that the shelf assembly is set for the desired rack size (either 19 or 23 inches).
Step 2 Lift the shelf assembly to the desired position in the rack.
Align the screw holes on the mounting ears with the mounting holes in the rack.
Step 3
While one person holds the shelf assembly in place, the other person can install one mounting screw in
Step 4
each side of the assembly.
Step 5 When the shelf assembly is secured to the rack, install the remaining mounting screws.
Note

1.3.3 Mounting Multiple Nodes

Most standard seven-foot racks can hold four ONS 15454s and a fuse and alarm panel. However, unequal
flange racks are limited to three ONS 15454s and a fuse and alarm panel or four ONS 15454s and a fuse
and alarm panel from an adjacent rack.
If you are using the bottom brackets to install the fan-tray air filter, you can install three shelf assemblies
in a standard seven-foot rack. If you are not using the 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.

Procedure: Mount Multiple Shelf Assemblies in a Rack

Note The ONS 15454 must have one inch of airspace below the installed shelf assembly to allow air flow
to the fan intake. If a second ONS 15454 is installed underneath a shelf assembly, the air ramp on top
of the bottom shelf assembly provides the desired space. However, if the ONS 15454 is installed
above third-party equipment, you must provide a minimum spacing of one inch between the
third-party shelf assembly and the bottom of the ONS 15454. The third-party equipment must not
vent heat upward into the ONS 15454.
Step 1 Install the fuse and alarm panel in the top space.
Step 2 Mount the first ONS 15454 directly below the fuse and alarm panel.
Step 3 Repeat the procedure with the third and fourth ONS 15454s.

1.3.3.1 Four Node Configuration

You can link multiple ONS 15454s using their OC-N cards (i.e., create a fiber-optic bus) to accommodate
more access traffic than a single ONS 15454 can support. For example, if you need to drop more than
112 DS-1s or 96 DS-3s (the maximum that can be aggregated in a single node), you can link the nodes
November 2001
Use at least one set of the horizontal screw slots on the ONS 15454 to prevent future slippage.
Cisco ONS 15454 Installation and Operations Guide
Rack Installation
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