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32 C2649M (9/07)
Data Activity LED ( )
Flashing amber Data is being trans-
mitted onto the fiber by
the data port or is
being received from
the fiber by the data
port.
– No action required.
Red The Data Select switch
is set to an invalid
position.
The Data Select switch is
set to position 6, 7, 8,
or 9.
Ensure that the Data Select
switch is set to the correct
position (refer to the
Setting the Data
Communication Mode
section for detailed
information).
Not lit Data is not being
transmitted onto the
fiber by the data port or
is not being received
from the fiber by the
data port.
Data is not present on
the channel.
No action required.
Data connection is faulty. Check data connections.
Data communication
cable is defective.
Replace cable.
(Continued on next page)
Table F. Troubleshooting with Front-Panel Indicators (Continued)
Indicator Color Meaning Possible Cause Corrective Action