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4 - 6 ONline Ethernet 10BASE-FB Module Installation and Operation Guide
5 Blinks Invalid Data Receive light
intensity too
high.
Verify that received
optical power level is
correct. Refer to
Chapter 2 (Link
Distances).
Connection
made to
10BASE-FL
Module.
Unplug the
connection. 10BASE-FL
is not compatible with
this 10BASE-FB
Module.
Bad fiber
connections.
Clean and reconnect
fiber (both ends).
Broken or
cracked fiber.
Check and fix RX fiber
link.
Bad remote
device.
Try another port or
replace device.
Bad 10BASE-FB
Module.
Replace the module.
6 Blinks Low Light
Received
Low light
received.
Verify optical power
received is at low end
of optical power
budget by doing an
optical power
calculation. If value is
acceptable, disable low
light detection.
Legal
configuration
with acceptable
low light.
Disable low light
detection or enable
High power at remote
end.
Table 4-2. Troubleshooting Using the Port Status LEDs (Continued)
LED State Indication Possible Cause Corrective Action