ProsKit 15-AT002, User Manual

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mail through the wire, or a crushed or pinched 
wire) if the 4 in 1 indicates a short. A visual 
examination of the RJ connectors may reveal 
the fault---but keep in mind that what-ever the 
cause of a connector problem (i.e. mis-wiring 
improper stripping of the wire, bad crimp, etc.) 
The only solution is to replace the connector. 
Consequently, it is not necessary for the user 
to know the exact cause of the problem, 
simply to make sure that he installs the new 
connector correctly!   

6. Conflicting Results:

 Sometimes, the tests   

results of the 4 in 1 seem to conflict with the   
performance of the cable---i.e., the cable 
tests badly but works OK, or vice versa. The 
following items list some of the reasons why.   

6.1 The 4 in 1 indicates the cable is not 
working, but my LAN works OK:

Installed LAN cables with RJ-45 connectors 
that have been in service and working OK 
may test as Open, Shorted, or Crossed. 
Here’s why---The EIA/TIA 568 standard for 
LAN cable only uses 4 of the wires in the 
eight-wire cable. The other 4 wires in the 
cable may have faults, but these will not 
affect the operation of the LAN. The 4 in _ 
tests all of the wires in the LAN cable, and 
identifies the faults, even though these wires 
may not being used in the LAN system. Not 
all LAN cables are wired straight through 
Crossover cables used on LANs are