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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 1 Shelf Assembly Hardware
1.13.2 Fan Speed
1.13.2 Fan Speed
Fan speed is controlled by the TCC2/TCC2P card’s 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
TCC2/TCC2P sensors appears on the LCD screen.
1.13.3 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.
The red Fan Fail LED clears after you install a working fan tray.
Caution As with the FTA3, the 15454E-CC-FTA (for ETSI) and 15454-CC-FTA (for ANSI) 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 15454E-CC-FTA and 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.
1.13.4 Air Filter
The ONS 15454 contains a reusable air filter (for ANSI: 15454-FTF2; for ETSI: 15454E-ETSI-FTF) that
is installed either below the fan-tray assembly or, for the ONS 15454 ANSI, in the optional external filter
brackets.
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. 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.
Earlier versions of the ONS 15454 ANSI shelf used a disposable air filter that is installed beneath the
fan-tray assembly only. However, the reusable air filter is backward compatible.
TXP_MR_10E_L Yes Yes
MXP_2.5G_10E_C Yes Yes
MXP_2.5G_10E_L Yes Yes
MXP_MR_10DME_C Yes Yes
MXP_MR_10DME_L Yes Yes
GE_XP/10GE_XP No Yes
ADM-10G No Yes
Table 1-12 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)
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