Cisco XR 12406 - Manual (Page 54)

Chapter 1 Cisco XR 12406 Router Overview
Line Cards
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Cisco XR 12406 Router Installation Guide
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If the air temperature inside the route processor 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.
Figure 1-17 Internal Air Flow—Top View
Air filter
Room air
Room air
Blower module
Top view
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Air exhaust Air exhaust