Fluke Networks CertiFiber Pro Users Manual - Manual (Page 153)

131
Chapter 5: How to Diagnose Copper
Test Failures
Causes of Twisted Pair Test Failures
Table 7. Causes of Twisted Pair Test Failures
Wire Map test fails
Open
 Wires connected to wrong pins at connector or punchdown blocks
 Bad connection
 Damaged connector or cable
 Wrong application for the cable or the wrong outlet configuration is
selected
Short
 Damaged connector or cable
 Conductive material stuck between pins at connector
 Incorrect termination at a connector
 Wrong application for the cable
Split pair, reversed pair, or crossed wires
 Wires connected to wrong pins at connector or punchdown block
Note
The HDTDX analyzer can help you locate split pairs.
See page 135.
Crossed pairs
 Wires connected to wrong pins at connector or punchdown block
 Mix of T568A and T568B wiring standards (1,2 and 3,6 crossed)
 Crossover cables used where not needed (1,2 and 3,6 crossed)
A test passes, but the plot shows that measurements exceed the limit
A dB rule possibly applies. See “About dB Rules” on page 116.
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