M320 Craft Interface Alarm Leds And Aco/Lt Button; M320 Craft Interface Led Display And Navigation Buttons; Table 3: Alarm Leds And Alarm Cutoff/Lamp Test Button; M320 Connector Interface Panel (Cip) Description - Juniper M320 Hardware Manual

M320 Multiservice Edge Router Hardware Guide

M320 Craft Interface Alarm LEDs and ACO/LT Button

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M320 Craft Interface LED Display and Navigation Buttons

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Two large alarm LEDs are located at the upper left 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.
A condition that causes an LED to light also activates the corresponding alarm relay
contact on the connector interface panel (CIP). The LCD on the craft interface reports
the cause of the alarm.
To deactivate red and yellow alarms, press the button labeled
cutoff/lamp test"), which is located to the right of the alarm LEDs. Deactivating an alarm
turns off both LEDs and deactivates the device attached to the corresponding alarm
relay contact on the CIP. However, the LCD continues to report the alarm message until
you clear the condition that caused the alarm.
Table 3 on page 16 describes the alarm LEDs and alarm cutoff button in more detail.

Table 3: Alarm LEDs and Alarm Cutoff/Lamp Test Button

Shape Color
Red
Yellow
—
M320 Craft Interface Description on page 15
M320 Connector Interface Panel (CIP) Description on page 13
M320 Craft Interface LED Display and Navigation Buttons on page 16
A four-line LED display is located in the craft interface, along with six navigation buttons.
The LED display operates in two modes:
LED display idle mode
LED display alarm mode
State Description
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.
On steadily Warning alarm LED—Indicates a serious but nonfatal
error condition, such as a maintenance alert or a
significant increase in component temperature.
— Alarm cutoff/lamp test button—Deactivates red and
yellow alarms. Causes all LEDs on the craft interface
to light (for testing purposes), when pressed and
held.
(for "alarm
ACO/LT
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