Patent ID: 7627025

Claim:
A method for detecting faults in cables, comprising: a) transmitting a transmitted signal on a cable; b) receiving a reflected signal from the cable; c) determining a multiplied echo canceller output, including multiplying an output of an echo canceller by an echo canceller gain factor; d) converging a plurality of echo canceller coefficients based on the reflected signal to adapt the multiplied echo canceller output to approximate the reflected signal, wherein each echo canceller coefficient of the plurality of echo canceller coefficients corresponds to a respective tap of a plurality of taps of the echo canceller; e) comparing a value of an echo canceller coefficient, of the plurality of echo canceller coefficients, corresponding to a given tap, of the plurality of taps, to a corresponding threshold, wherein the corresponding threshold is based on a piecewise linear function of a tap number associated with the given tap; and f) repeating step e) for each remaining tap of the plurality of taps.