T320 Craft Interface Alarm Leds And Aco/Lt Button; Figure 10: Front Panel Of The T320 Craft Interface; Table 4: T320 Alarm Leds And Alarm Cutoff/Lamp Test Button - Juniper Core Router T Series Hardware Manual

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T320 Craft Interface Alarm LEDs and ACO/LT Button

Copyright © 2018, Juniper Networks, Inc.

Figure 10: Front Panel of the T320 Craft Interface

T320 Chassis Description on page 13
Replacing a T320 Craft Interface on page 189
Two large alarm LEDs are located at the upper left of the craft interface (see
on page 21). 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), as described in
Contacts" on page 18. The LCD on the craft interface reports the cause of the alarm, as
described in "T320 Craft Interface LCD and Navigation Buttons" on page
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 4 on page 21 describes the alarm LEDs and alarm cutoff button in more detail.

Table 4: T320 Alarm LEDs and Alarm Cutoff/Lamp Test Button

Shape Color
Red
Yellow
—
Chapter 3: Chassis Components and Descriptions
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) when pressed and held.
Figure 10
"T320 Alarm Relay
22.
ACO/LT (for "alarm
21