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Advanced FE/E1 Fiber Converters
14 –Troubleshooting
Prior to performing the following procedures, ensure that the DIP switches are in
their default setting
Problem
No power
Network problems
TP
port
link
working
TP link not working at
100M when FEM
connected to 100Mbps
or 10/100Mps device
TP link not working at
10M when the FEM is
connected to 10M
device (copper side).
FEM/FEM4 not
recognizing Full
Duplex (for TP ports)
Indication
Power LED not
lit
No
communication
on network
not
Link / Activity
LED not lit
Both Link
/Activity LED
and 100M LED
not lit
Link/Activity
LED not lit
FDX LED not lit
Corrective Action
Check that the power supply cable is firmly
connected to the device and to the wall
power socket.
Check that the AC input power source is
between 100 and 240VAC.
Check the various LEDs indications and
cabling TP and F/O links and act according
to the visible symptom.
Check that the attached cable is well
connected at both ends. Use STP cabling
Check that the connected device is working
properly at 100Mbps or 10Mbps.
Does the connected device support A/N?
Check the physical interconnection between
the FEM and the connected device.
Check/Verify the status of the suspected
port
Interchange between the suspected port
and another FEM Ethernet port (port 1 thru
4)
Check that the connected device is working
properly at 100Mbps (FDX/HDX)
Check the interconnection between the FEM
and the attached device.
Check that the connected device is working
properly at 10Mbps (FDX/HDX)
Verify the status of the suspected port
Use for the problematic and suspected link
the TP port (porE1) and force it to 10Mbps
and FDX/HDX. Use DIP switches S7, S8, and
S9
Check the interconnection between the TP
FEM port and the attached device.
Verify that the connected device is FDX
capable and set to FDX properly. If HDX
then the indication is correct and you have
to setup the FEM TP accordingly (Auto-
Negotiation or by selecting TP port 1 to the
desired setting)
22
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