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Monitoring the DSU/CSU
6-3
7112-A2-GB20-20
March 1998
System LEDs
OK:
ON – DSU/CSU is operational.
OFF – DSU/CSU is performing a power-up self-test, has detected a
system failure, or there is no power.
FAIL:
ON – DSU/CSU has detected a system or device failure, or
is performing a power-up self-test. Refer to
Troubleshooting
in Chapter 8.
TEST:
ON – Test in progress. Test can be initiated locally, remotely,
or from the network. Includes power-up self-test.