3Com 5102B-EE installation and operation guide Initiating Self-Test, Front Panel LED Display

D Power-Up Self-Test

This appendix describes the diagnostic tests run by the Bridge Module upon power up. This section also explains how to start the Bridge Module self-test and how to interpret LED and screen displays that result from the various tests. The last section explains what to do if an error does occur.

Initiating Self-Test

The self-test diagnostic sequence begins any time you perform one of the following actions:

❑Plug the module into a powered (live) concentrator

❑Cycle power on the concentrator

❑Press the Reset button on the module front panel

❑Enter the RESET command at the Management prompt

Front Panel LED Display

Under normal conditions, the entire self-test sequence is completed in twenty seconds or less. At the end of the sequence, all LEDs are OFF. If the

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