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Cisco NCS 4216 Overview
Redundancy
Three power supplies can be plugged in the NCS 4216 chassis that works in the 2+1 redundancy mode. For
the normal operation of the chassis, at least two power supplies should be powered on. When all the three
power supplies are plugged in, they work in a current sharing mode.
Each power supply has dual feed. It is recommended to connect each power feed to a separate input source.
Dying Gasp
The Cisco NCS 4216 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 NCS 4216, see
The DC Power Supply Specifications table summarizes the input power specifications for the Cisco NCS
4216 DC power supply units.
Fan Tray
The fan tray modules supported on the router is:
• ASR907-FAN-E
The NCS4216 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
install the fan tray, see
Summary
Dust Filter (A907-F2B-AIR)
The dust filter on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. For installing
the fan filter, see
Installing the Fan Tray
section.
Removing and Replacing the Dust Filter
Air Flow Guidelines
section. For instructions on how to
section. For a summary of the LEDs on the fan tray, see
section.
Cisco NCS 4216 Hardware Installation Guide
Fan Tray
Troubleshooting
section.
LED
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