Patent ID: 7116760
Filing Date: 2006-10-03
Classification: H04B,H04M

Abstract:
1. A method for determining the suitability of a wire communication line for xDSL service via single-ended analysis, comprising: a) obtaining a return waveform by using a TDR at a single end of the wire communication line; b) determining a transfer function based on the return waveform, the transfer function representing a signal strength or signal loss for each of the plurality of xDSL frequency bands; c) measuring wideband noise at a customer side of the wire communication line; and d) determining the signal to noise ratio based on the determined transfer function and the measured noise so as to quality the wire communication line for xDSL use; wherein step d) includes comparing the return waveform against a library of known transfer functions that represent known wire plant models to estimate the transfer function of the wire communication line.