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Trouble-shooting
1. Power LED is not lit
l Check if the power cord is properly connected to the power outlet and the hub.
Make sure the power switch on the hub is turned ON.
2. LNK/Rx LED is not lit after connecting to an active workstation
l Check the power switch of the network devices attached to the hub; make sure
they are turned ON.
l Check the network cable; make sure it is properly connected to the hub and the
network device.
l Check the network cable; make sure the cable complies with EIA/TIA 568
specification. Use straight-through minimum Category 3 grade cables.
l Do not use uplink port to connect to a workstation.
3. Uplink (16th) port’s LNK/Rx LED is not lit after uplink to another hub
l Check the network cable; make sure it is properly connected to both hubs. One
end of the cable should be connected to uplink port while the other end of the
cable should be connected to a regular port. Do not connect the cable to both
uplink ports.
l Check the network cable; make sure the cable complies with EIA/TIA 568
specification.
l Check the length of the network cable does not exceed 100 meters (300 feet).
l Make sure both hubs are powered ON.
4. AUI/BNC ports do not transmit
l Check the DIP switch setting.
l Check the AUI transceiver; make sure the SQE is set at OFF.
l Check the attachment of coaxial cable; make sure there’s no loose connection.
l Check the coaxial cable; make sure the segment is terminated with 50-ohm
terminator.
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