Nortel Networks 1000BASE-SX, 1000ASE-XD, 1000BASE-LX Normal power-up sequence, Corrective actions

176Chapter 4 Troubleshooting

Avvertenza: Per evitare lesioni fisiche dovute a scariche pericolose di corrente, non rimuovere mai il coperchio superiore del dispositivo. I componenti interni non possono essere manipolati dall’utente.

Normal power-up sequence

In a normal power-up sequence, the LEDs appear as follows:

1After power is applied to the switch, the Pwr (Power) LED turns on within 5 seconds.

2The switch initiates a self-test, during which the port LEDs display various patterns to indicate the progress of the self-test.

3After the self-test, the remaining port LEDs indicate their operational status, as described in Table 43.

Table 43 Corrective actions

Symptom	Probable cause	Corrective action
All LEDs are off.	The switch is not receiving AC	Verify that the AC power cord is fastened
	power.	securely at both ends and that power is available
		at the AC power outlet.
	The fans are not operating or	Verify that there is sufficient space for adequate
	the airflow is blocked, causing	airflow on both sides of the switch.
	the unit to overheat.
			Note: Operating temperature for the
			switch must not exceed 40°C (104°F). Do
			not place the switch in areas where it can
			be exposed to direct sunlight or near
			warm air exhausts or heaters.

209418-A