Nortel 1800, Installing

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38 LED indications of problems
317808-D
LED indications of problems
Table 6 lists possible problems indicated by the LEDs on the Metro ESU 1800 and
suggests corrective action.
Table 6 LED problem indicators
Symptom Probable cause Corrective action
The Power LED is off. The internal power is not
working properly. Contact your Nortel customer service
representative.
The Link/Activity LED for a
connected port is off or
does not blink (and you
believe that traffic is
present). The switch is experiencing a
port connection problem, or
the switch link partner is not
auto-negotiating properly. Verify that the cable connections to the link
partner are correct. Verify port configuration
parameters for both ends of the connection.
Move the cable to another port to see whether
the problem occurs on the new port.
The Link/Activity LED blinks
continuously. There may be a port
configuration error. Verify port configuration parameters for both
ends of the connection.
No LEDs are lit. A hardware failure has been
detected. Disconnect the power cord and then connect
it again.