Nortel 1000BASE-LX, Инструкция по использованию, Страница: 176 / 214

176 Chapter 4 Troubleshooting
209418-A
Normal power-up sequence
In a normal power-up sequence, the LEDs appear as follows:
1 After power is applied to the switch, the Pwr (Power) LED turns on within 5
seconds.
2 The switch initiates a self-test, during which the port LEDs display various
patterns to indicate the progress of the self-test.
3
After the self-test, the remaining port LEDs indicate their operational status,
as described in
Table 43 .
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.
Table 43 Corrective actions
Symptom Probable cause Corrective action
All LEDs are off. The switch is not receiving AC
power. Verify that the AC power cord is fastened
securely at both ends and that power is available
at the AC power outlet.
The fans are not operating or
the airflow is blocked, causing
the unit to overheat. Verify that there is sufficient space for adequate
airflow on both sides of the switch.
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.