Nortel Communication Server 1000E Maintenance Manual page 31

Alarm/fan module features 31
The system LED consolidates the status of the other three LEDs. If the
fans, power, and temperature are all within normal operating parameters,
the system LED is green. If any of the three other LEDs is red, indicating
trouble, the system LED also appears red.
Figure 3 "Fan trouble LEDs" (page 31) shows the alarm/fan Module LEDs
indicating fan trouble.
Figure 3
Fan trouble LEDs
Because the system LED shows the status of the other three LEDs, it is
used to determine the overall status of the Call Server. It is visible through
a light pipe in the Call Server front cover.
For information about replacing Call Server components, including the
alarm/fan module and power module, see "Replacing equipment" (page
109).
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 04.01 4 June 2010
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