Cisco RFGW-10 Hardware Installation Manual page 22

Cisco RFGW-10 Components
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The fan assembly draws air into the chassis and directs it across the internal system components. The
heated air exhausts out of the rear of the chassis as shown in
Figure 1-4
The fan tray has four speed levels based on the operating control modes for the system. After power on,
the fan speed is set according to the Supervisor provided ambient average air temperature and the
configured speed control mode in the system configuration. The default control mode setting configures
the fans at maximum speed. The speed of the fans regulate to a slower speed when the fan controller
stabilizes to the ambient temperature and chassis temperature. After startup, it may take up to 30 seconds
for the fans to stabilize at the requested RPM.
Figure 1-5
OK) located in the center of the module. The FAN OK LED status indicators are defined in
Table 1-2 Fan Assembly LED
Cisco RF Gateway 10 Hardware Installation Guide
1-8
Online insertion and removal OIR support
Failure monitoring of individual fans
Backup temperature monitoring to control individual fan rotation per minute (RPM)
Usage counter based on hours of operation (CLI-based)
Front panel LED for alarm status indication
Control and power circuit failure alarms
On board multi-level fan speed control based on system temperature
Cisco RFGW-10 Airflow
and Figure 1-6 show the fan assembly module. The fan tray has a single LED indicator (FAN
Chapter 1
Figure 1-4.
Overview
Table 1-2:
OL-16264-04