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Cisco ONS 15454 Procedure Guide, R4.0
March 2003
Chapter 1 Install the Shelf and Backplane Cable
NTP-A2 Install the Shelf Assembly
DLP-A4 Install the External Brackets and Air Filter
Note The shelf assembly ships with external (bottom) brackets that you can use to install the air filter on the
bottom of the shelf rather than beneath the fan-tray assembly. When you use the brackets to install the
fan-tray air filter, you do not need to remove the fan-tray assembly to access the air filter. Attach the
brackets to the bottom of the shelf assembly before installing the rack.
Note If you choose not to install the brackets, install the air filter by sliding it into the compartment at the
bottom of the shelf assembly. Each time you remove and reinstall the air filter in the future, you must
first remove the fan-tray assembly. Do not install an air filter in both filter locations on any shelf
assembly.
Step 1 With the fan-tray assembly removed, place the ONS 15454 face down on a flat surface.
Note Although the filter will work if it is installed with either side facing up, Cisco recommends that you
install it with the metal bracing facing up to preserve the surface of the filter.
Step 2 Locate the three screw holes that run along the left and right sides of the bottom of the shelf assembly.
Step 3 Secure each bracket to the bottom of the shelf assembly using the screws (48-0003) provided in the
backplane standoff kit (53-0795-XX).
Each bracket has a filter stopper and a flange on one end. Make sure to attach the brackets with the
stoppers and flanges facing the rear of the shelf assembly (the top, if the ONS 15454 is face-down during
installation).
Figure 1-2 illustrates bottom bracket installation. If you do not use the brackets, in the future you must
remove the fan-tray assembly before removing the air filter. The brackets enable you to clean and replace
the air filter without removing the fan-tray assembly.
Purpose This task installs the external brackets and air filter.
Tools/Equipment #2 Phillips screwdriver
Medium slot-head screwdriver
Small slot-head screwdriver
Prerequisite Procedures DLP-A3 Reverse the Mounting Bracket to Fit a 19-inch (482.6 mm) Rack,
page 1-6, if applicable
Required/As Needed As needed; perform this task if you want to access the air filter without
removing the fan-tray assembly.
Onsite/Remote Onsite
Security Level None
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