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Alarm LEDs and Lamp Test Button
Two large alarm LEDs are located at the top of the craft interface.
The circular red LED lights to indicate a critical condition that can result
in a system shutdown. The triangular yellow LED lights to indicate a less
severe condition that requires monitoring or maintenance. Both LEDs can be
lit simultaneously. The button labeled LT (for “lamp
test”), located to the left of the alarm LEDs, causes all LEDs on the
craft interface to light when pressed and held; use it to test that LEDs are
functional.
Table 4 describes the alarm LEDs and lamp
test button in more detail.
Table 4: Alarm LEDs and Lamp Test Button
|
Shape
|
Color
|
State
|
Description
|
|
|
Red
|
On steadily
|
Critical alarm LED—Indicates a critical condition that can cause
the router to stop functioning. Possible causes include component removal,
failure, or overheating.
|
|
|
Yellow
|
On steadily
|
Warning alarm LED—Indicates a serious but nonfatal error condition,
such as a maintenance alert or a significant increase in component temperature.
|
|
|
—
|
—
|
Lamp test button—Causes all LEDs on the craft interface to light
(for testing purposes), when pressed and held.
|
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