Patent ID: 6236714
Filing Date: 2001-05-22
Classification: H04B,H04M

Abstract:
A method of reducing distortion in the voiceband of a splitterless Digital Subscriber Line (DSL), comprising the steps of:transmitting a probe signal to at least one telephone set, the probe signal having a plurality of sections, each section including a plurality of symbols, wherein each section of symbols is transmitted at a predetermined power level;receiving a distortion signal reflected from the telephone set due to each section of the probe signal;detecting a corner point based on the measurement of the received distortion signal from the plurality of sections of the probe signal;wherein the corner point is detected by performing the steps of:computing a ratio having a numerator equal to the difference between each two adjacent measurements and a denominator equal to the difference between these two adjacent power levels; andfinding a sharp change in the ratio value.