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M320 Craft Interface LED Display and Navigation Buttons

 

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

During normal operation, the LED display operates in idle mode and reports current status information, as shown in Figure 1.

Figure 1: LED Display in Idle Mode
LED Display 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:

  • Third and fourth lines—Status messages, which rotate at 2-second intervals. Some conditions, such as removal or insertion of a system component, can interrupt the messages.

To add a message that alternates every 2 seconds with the default status messages, use the set chassis display message command. For more information, see the CLI Explorer.

When a red or yellow alarm occurs, the LED display switches to alarm mode and reports about the alarm condition, as shown in Figure 2.

Figure 2: LED Display in Alarm Mode
LED Display in Alarm
Mode

The lines in the display report the following information:

  • First line—Router name.

  • Second line—Number of active alarms.

  • Third and fourth lines—Individual alarm messages, with the most severe condition shown first. The prefix on each line indicates whether the alarm is a red (R) or yellow (Y) alarm.

For a list of alarm messages that can appear on the LED display, see M320 Chassis and Interface Alarm Messages.