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Cisco ONS 15600 Reference Manual, R7.2
Chapter 1 Shelf and Backplane Hardware
1.10 Fan-Tray Assembly
1.10 Fan-Tray Assembly
The fan-tray assembly is located at the top of the ONS 15600 shelf front compartment. The fan-tray
assembly has three removable drawers that hold two fans each and fan-control circuitry for the
ONS 15600 (Figure 1-12). You should only need to access the fans if a fan fails.
Figure 1-12 Fan-Tray Assembly
1.10.1 Air Filter
The ONS 15600 contains a reusable air filter that is made of an open-cell polyurethane foam that is flame
retardant and fungi resistant. The air filter is located above the three fan trays (Figure 1-13). This
disposable filter is designed to be cleaned using only mild detergents. You can order air filter
replacements from Cisco Systems (P/N 700-13116-05). Keep spare filters in stock. Refer to the
Cisco ONS 15600 Procedure Guide for information about replacing the fan-tray air filter.
Caution
Inspect the air filter every 30 days, and clean the filter every three to six months. Replace the air filter
every two to three years. Avoid cleaning the air filter with harsh cleaning agents or solvents.
Caution
Do not operate an ONS 15600 without a fan-tray air filter. A fan-tray filter is mandatory.
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