1.
13,000RPM (194CFM) for T≤30C
2.
14,500RPM (218 CFM) for 30<T≤ 40C
3.
16,000RPM (239 CFM) for T>40C
If there are more than 2 fan failures, the speed of the remaining fans automatically default to 16,000
RPM.
• A fan operating at speeds between 301 and 999 RPM from the set point, is considered a minor fan alarm.
The fan speeds are not elevated in case of a minor alarm. The Fan Module amber LED is illuminated.
• When the chassis is booted and a fan is missing or removed the Supervisor Card sets all the other
operational fans to 16,000 RPM. The chassis will not boot with a missing Fan Module. When a working
Fan Module is replaced and all the other Fan Modules are working correctly the Supervisor Card will
return all the fans to their normal operational speed. When a Fan Module is initially removed the Supervisor
Card sets all the remaining fans to run at 13,000 RPM for 10 seconds, 14,500 RPM for 30 seconds,
ramping to 15,000RPM for the next 30 seconds and then ramping to 16,000RPM until all the Fan Modules
are again shown present.
Variations in speeds occur to regulate the internal component temperatures. Such speed variations are normal,
in the absence of any alarms. For more details, see
.
Note
Air Filter
The air filter is a field replaceable unit on the Supervisor and RF line cards. It removes dust in the air that is
drawn into the router by the cooling fans. We recommend that you examine the air filter at least once a month
or more often if required. Do not clean and re-use air filters. They must be replaced when they are clogged
or worn out.
You can remove and install an air filter when the Cisco cBR router is powered on and working.
Note
Cisco IOS-XE Software
The Cisco cBR Series Converged Broadband Router (Cisco cBR) runs the Cisco IOS-XE software, which
is stored on the Type II PCMCIA flash memory disks stored in the two PCMCIA slots in the primary route
processor module. A PCMCIA flash memory disk in either slot can store a Cisco software image or
configuration file. In addition to the flash memory disks, each route processor module contains onboard flash
memory that is used to store a boot loader. The loader executes following a system reset to reload and execute
the Cisco IOS-XE software on the flash memory disks.
The route processor module also stores the system configuration in the onboard flash memory. The configuration
information read from the flash memory is buffered in operational memory following initialization, and is
written to the flash memory device when the configuration is saved. Each line card also contains onboard
flash memory that is used to store a boot loader, similar in function to that used on the route processor module.
However, the line card loader executes following a system reset, line card reset, or line card insertion to reload
and execute any code that must run on the line card. Software images may also be stored on an external TFTP
Cisco Converged Broadband Routers Hardware Installation Guide
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What is a Cisco cBR Series Converged Broadband Router
Air Filter
