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MC100FX-SC2/30 User’s Guide
16
Troubleshooting
Use the LEDs to identify possible problems and then take corrective
action.
PROBLEM POSSIBLE CAUSES AND REMEDIES
The PWR LED
is off
Make sure you are using the supplied power adaptor
and that it is plugged in to an appropriate power source.
Check that the power source is turned on.
If the problem persists, you may have a hardware
problem. In this case, you should contact your local
vendor.
The 100M LED
is off
Check if the media converter has a connection with a
10Mbps Ethernet device.
Check the Ethernet cable connection between the
media converter and the Ethernet device. The distance
between them should not be more than 100 meters
Check for faulty Ethernet cables.
If the connected Ethernet device does not support auto-
negotiating, turn on DIP switch 1 to force a 100 Mbps
full-duplex link.
If Link Loss Forwarding is enabled (DIP switch 3 is on),
then check if the fiber link is down (thereby forcing the
Ethernet link down).
The LNK/ACT
(Ethernet) LED
is off
Check the Ethernet cable connection between the
media converter and the Ethernet device. The distance
between them should not be more than 100 meters
Check for faulty Ethernet cables.
Check that the Ethernet device supports auto-
negotiating at half/full duplex and 100MBps speed.
If Link Loss Forwarding is enabled (DIP switch 3 is on),
then check if the fiber link is down (thereby forcing the
Ethernet link down).
16


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