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Messages and Troubleshooting
6-6
7975-A2-GB20-40
December 1998
Table 6-2. Troubleshooting (2 of 2)
Symptom SolutionsPossible Cause
Not receiving data. H The network or data port
cables are not
connected (check front
panel LEDs for more
information).
H A test is being executed
H Check network and data port
cables.
H Run Loopback tests. Refer to
Chapter 5,
Testing
.
H
Sto
p
the test or wait for the test to
H
A
test
i
s
b
e
i
ng execute
d
on the unit (check the
TEST LED on the front
panel).
H The far-end device is
off-line.
H Stop
the
test
or
wait
for
the
test
to
end.
H Make sure the far-end device is
on.
Power-Up Self-Test
fails. Only Alarm
LED is on after
power-up.
The unit has detected an
internal hardware failure.
H Reset the unit and try again.
H Contact your service
representative.