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M15-155 Installation Guide 9
Chapter 3
Troubleshooting
Use the table below to troubleshoot common problems. If you still experience
problems, please contact Avaya Communication Technical Support.
Problem Probable Cause Solution
BIT LED remains ON
after power up or reset
Module self-test failed i) Check that the module is
correctly and fully inserted into
the M770 ATM switch chassis
ii) Reboot or power-up again
All LEDs remain ON
after power up or reset
Module fault Reboot or power-up again
Port LED blinks while
function LED is on
LNK
Link failure Check the fiber connection to the
port
OPR LED does not
light ON after reboot
(after more than 30
seconds)
The module may be in
Monitor mode because
of a Long Reset
Reset the module again but this
time make a Short Reset (less than 4
seconds)