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Table 1-2 Port and System Status LEDs

LED Condition Status
Major Red Indicates presence within the system of one
or more major traffic-affecting system
alarm(s) that are not masked by the alarm
filter.
Minor Amber Indicates presence within the syste m of one
or more minor traffic-affecti ng system
alarm(s) that are not masked by the alarm
filter.
Fan Fail Red Indicates failure of one or more fans.
Diag Flashing Green System self-diagnostic test in progress.
Green System self-diagnostic test successfully
completed.
Off System self-d iagnostic test has detected a
fault.
Link/Activity Green Port has a valid link.
Flashing Green Flashing indicates activity on the port.
Off The link is down.
Power
Module*
-48V/+12V
or AC/+12V
Green DC or AC power is functioning normally.
Off External power not con nected or has failed.
* The -48V/AC LEDs on the left indicate the status of external power. The
+12V LED on the right indicates the status of the internal power conversion
process.