3Com 5000 ATM manual Reading the Base Module LEDs, Module Status LED State

6-2CHAPTER 6: TROUBLESHOOTING

When you press the LED test button:

1The Controller Module initiates a test to all modules in the hub. All LEDs should respond by lighting continuously for approximately

5 seconds.

2During this time, the bi-color LEDs should alternate between green and yellow approximately every ½ second.

See Appendix B for instructions about contacting 3Com Technical Support for your product.

Reading the Base Module LEDs

Table 6-1 identifies the normal phases of operation of the base module LEDs upon power-on or hardware reset.

Table 6-1Base Module LED Status

Module Status	LED State
	MOD	PACKET
	STAT	CHANNEL
Prior to power-on	Off	Off
Diagnostics upon power-on	Yellow	Off
Failed diagnostics	Yellow	Green
Passed diagnostics; ready to exchange data	Green	Green
Receiving ATM cells and forwarding them to	Green	Yellow
the packetchannel backplane
Module problem indications during normal	Steady yellow or	Off
operation*	Off

* Refer to Determining Corrective Action.