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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 1 Shelf and Backplane Hardware
1.14.2 Fan Speed
1.14.2 Fan Speed
Fan speed is controlled by TCC2/TCC2P card temperature sensors. The sensors measure the input air
temperature at the fan-tray assembly. Fan speed options are low, medium, and high. If the TCC2/TCC2P
card fails, the fans automatically shift to high speed. The temperature measured by the TCC/TCC2P2
sensors is displayed on the LCD screen.
1.14.3 Fan Failure
If one or more fans fail on the fan-tray assembly, replace the entire assembly. You cannot replace
individual fans. The red Fan Fail LED on the front of the fan tray illuminates when one or more fans fail.
For fan tray replacement instructions, refer to the Cisco ONS 15454 Troubleshooting Guide. The red Fan
Fail LED clears after you install a working fan tray.
Caution As with the FTA3, the 15454-CC-FTA Fan Fail LED on the front of the fan-tray assembly illuminates
when one or more fans fail to indicate that a fan-tray assembly or AIP replacement is required. But the
Fan Fail LED on the 15454-CC-FTA will also illuminate when only one power source is connected to
the chassis, and or any fuse blows. In such conditions, the Fan Alarm is triggered and the fans run at
maximum speed.
1.14.4 Air Filter
The ONS 15454 contains a reusable air filter; Model 15454-FTF2, that is installed either beneath the
fan-tray assembly or in the optional external filter brackets. Earlier versions of the ONS 15454 used a
disposable air filter that is installed beneath the fan-tray assembly only. However, the reusable air filter
is backward compatible.
The reusable filter is made of a gray, open-cell, polyurethane foam that is specially coated to provide fire
and fungi resistance. All versions of the ONS 15454 can use the reusable air filter. Spare filters should
be kept in stock.
G1000-4 Yes Yes
G1K-4 Yes Yes
M100T-12 Yes Yes
M100X-8 Yes Yes
ML1000-2 Yes Yes
ML-MR-10 No Yes
CE-100T-8 Yes Yes
CE-MR-10 No Yes
CE-1000-4 Yes Yes
FC_MR-4 Yes Yes
Table 1-27 Fan Tray Units for ONS 15454 Cards
ONS 15454 Cards
15454E-FTA-48V (ETSI shelf)
/15454-FTA3-T(ANSI shelf)
15454E-CC-FTA (ETSI shelf)/
15454-CC-FTA (ANSI shelf)