Intermec MobileLAN access, Руководство пользователя

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Appendix B — Specifications and Troubleshooting
22 MobileLAN power User’s Guide
Troubleshooting (continued)
Symptom Resolution
The Power Active
LED is not lit and
the end device does
not operate. The port is not providing power because the Power
Bridge did not detect a connected end device.
Verify that you are using a standard UTP Category 5
(or higher) cable, including all eight wires (four pairs).
If you are using an external splitter, replace it with a
new splitter. If the end device works, discard the faulty
splitter.
Verify that you are not using a crossover twisted pair
wire.
Verify that the end device is connected to the Data &
Power Out port (left RJ-45 connector).
Try to bypass the long twisted pair cable and bring the
end device close to the Power Bridge. Connect it to the
port using a short cable—if it works, you probably have
a faulty connection or short on the long cable, or a bad
RJ-45 connection along the line.
If possible, try to connect the end device to a different
Power Bridge—if it works, the Power Bridge is probably
faulty. Try to power it up again and verify a correct
power up LED sequence.
Wait for 5 to 10 seconds. If the Power Active LED
lights, there was a charged capacitor in the end device,
which was discharged after being plugged in. The end
device can then be detected and activated.