Troubleshooting the T640 Craft Interface

Problem

• The router is powered on, but none of the LEDs on the craft interface are lit.
• A yellow alarm indicates that the craft interface has failed.

Solution

1. Check the LEDs on the craft interface.
2. Use the CLI to check for alarms.
   • Standalone T640 router—Issue the show chassis alarms command to view the alarms.
   • T640 router in a routing matrix—Issue the show chassis alarms lcc lcc-number command to view the alarms.

In Table 1, the text in the column labeled ”LCD Message” appears in the display of the craft interface. The text in the column labeled “CLI Message” appears in the output from the show chassis alarms command.