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Fan Tray
Redundancy
The Cisco ASR 907 Router chassis includes a slot for an optional redundant power supply. The redundant
power supply option provides a second power supply to ensure that power to the chassis continues uninterrupted
if one power supply fails or input power on one line fails. Redundancy is supported either with identical power
supplies or a combination of AC and DC power supply. The Cisco ASR 907 Router supports current sharing
between the power supplies.
If you install a redundant power supply on the Cisco ASR 907 Router, we recommend that you connect each
power supply to a separate input power source in order to ensure that the router maintains power in the event
of a power interruption caused by an electrical failure, a wiring fault, or a tripped circuit breaker.
Dying Gasp
The Cisco ASR 907 Router DC power supply does not support the Dying Gasp feature.
Status LEDs
LEDs are also provided on each power supply to indicate the status of the input power and the health of the
power supply. For more information about the LEDs on the Cisco ASR 907 Router, see Troubleshooting.
Fan Tray
The fan tray modules supported on the router is:
• A907-FAN-E
The ASR907 Fan tray uses:
• Four dual rotor fans—for the PSU area cooling
• 12 fans (three columns for four fans)—60x60x38mm fans for the RSP and IM area
The fan tray has the following hardware features:
• It provides side-to-side forced air cooling
• It provides redundant fans
• It is field replaceable
• It contains status LEDs
For more information about air flow guidelines, see
the fan tray, see
Dust Filter (A907-FAN-F)
The dust filter on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. For installing
the fan filter, see
Cisco ASR 907 Router Hardware Installation Guide
8
Installing the Fan
Tray. For a summary of the LEDs on the fan tray, see
Removing and Replacing the Dust
Cisco ASR 907 Router Overview
Air Flow
Guidelines. For instructions on how to install
Filter.
LED
Summary.
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