Table of Contents
Advertisement
Figure 4-20. Three-Wire RFL Test Result: Distances
RFL Test: K-Test Option
The "K-Test" is a variation of RFL that can be used whenever a double-sided
fault is present, and there are no good conductors in the cable to use for either
the "Good Wire" or "Good Pair" strapping function.
K-Test Pair Requirements
1.
Both resistance faults must be to the same fault potential, and occur at the
same physical place on the cable.
2.
The larger fault resistance must be greater than twice the smaller value.
3.
The larger fault resistance must be at least one hundred times greater than
the pair's loop resistance.
POTS Testing and Fault Location
The POTS Toolbox
4
acy27s.eps
4-33
Advertisement
Table of Contents
