Cisco 12406 Installation And Configuration Manual page 76

Blower Module
Figure 1-17 Internal Air Flow (Top View)
Blower module
Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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If the air temperature inside the RP and line card cage rises, the system
environmental monitor shuts down all internal power to prevent equipment
damage from excessive heat.
If the system detects that one of three fans within a blower module has failed, it
displays a warning message on the console screen. If multiple fans fail, the system
shuts down to prevent equipment damage.
Air exhaust
Top view
The two LEDs on the blower module provide a visual indication of blower module
status. Both LEDs are visible on the blower module from the rear of the chassis.
Air exhaust
Room air
Room air
Air filter
Chapter 1 Product Overview
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