T640 Craft Interface Lcd And Navigation Buttons; Figure 24: T640 Lcd In Idle Mode; Table 12: Alarm Leds And Alarm Cutoff/Lamp Test Button - Juniper T640 Hardware Manual

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T640 Craft Interface LCD and Navigation Buttons

Copyright © 2010, Juniper Networks, Inc.

Table 12: Alarm LEDs and Alarm Cutoff/Lamp Test Button

Shape Color
Red
Yellow
—
T640 Chassis Description on page 13
Troubleshooting Using the T640 Craft Interface LEDs
Replacing a T640 Craft Interface on page 196
A four-line LCD is located in the craft interface, along with six navigation buttons. The
LCD operates in two modes:
LED Idle Mode
LED Alarm Mode
During normal operation, the LCD operates in idle mode and reports current status
information, as shown in Figure 24 on page 43.

Figure 24: T640 LCD in Idle Mode

The lines in the display report the following information:
First line—Router name.
Second line—Length of time the router has been running, reported in the following
form:
Up days + hours:minutes
Chapter 3: T640 Router Hardware Component Overview
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.
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