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Chapter 4
Thermal Management
Environmental Monitoring
Caution
Never operate the system for more than three minutes when the fan assembly is removed. An
over-temperature condition can cause severe equipment damage.
Environmental Monitoring
The Cisco RFGW-10 UEQAM is equipped to monitor the ambient air intake and exhaust temperatures.
Each RF line card has ambient air intake sensors that are located on the leading edge of the line card and
are used for monitoring the ambient air inlet temperatures. These temperature readings are used as input
for the fan tray speed control system for optimized system cooling, acoustics, and system thermal
alarms.
The Supervisors have thermal sensors located at various locations on the printed circuit board (PCB).
These sensors monitor board level temperatures only. Temperatures read from these sensors are used for
Supervisor board level thermal alarming and board thermal protection shutdown.
Note
The temperatures read from the Supervisor Cards are not ambient intake temperatures but specific board
location temperatures used for board level thermal alarming.
The fan tray is equipped with exhaust sensors located over the Supervisor slots. These are for additional
temperature monitoring on the Supervisors. These temperature readings are used as input for the fan tray
speed control system for optimized system cooling, acoustics, and system thermal alarms.
Cisco RF Gateway 10 Hardware Installation Guide
4-3
OL-16264-04
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