Fluke Network Tester User Manual page 56

NetTool
Users Manual
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Problem: Pair mismatch
Explanation: The link pulse is being sourced on the
same wire pair by both sides. This problem does not
prevent connection to the network. NetTool
automatically swaps the pairs to correct this problem.
Remedy: Check the cabling. It may be plugged into
an uplink port. Also, there may be a crossover cable
between NetTool and the device.
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Problem: Duplex mismatch
Explanation: One side is running at half duplex and
the other side is running at full duplex. This mismatch
prevents connection to the network.
Remedy: Reconfigure the devices so the duplex
settings match.
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Problem: Polarity reversed
Explanation: The polarity of the detected link pulse is
reversed.
Remedy: This is most likely due to a reversed pair.
Check cabling to ensure that the pairing is correct.
6-4
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Problem: Level low
Explanation: The link pulse detected from a device is
low. This can negatively affect performance.
Remedy: Replace the NIC card or change the
hub/switch ports. This problem can also be caused by
excessive cable attenuation.
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Problem: Transmit pair open
Explanation: The wire pair used to transmit (1,2 or
3,6) has an open. This problem prevents connection
to the network.
Remedy: Isolate the cable and replace it.