Patent ID: 6775240
Filing Date: 2004-08-10
Classification: H04L,H04M

Abstract:
A system for measuring channel impairments associated with a communications path comprising:a test signal transmitter, said test signal transmitter being-adapted to transmit first and second channel outputs over first and second paths, one of said first and second paths defining a reference path having known impairment characteristics, the first channel output being transmitted over the reference path and yielding a reference signal, the other of said first and second paths defining a test path for which impairment characteristics are to be measured, the test path including at least a first and second phone set interconnected by a telephone network, the second channel output being transmitted over the test path and yielding a test signal; a test signal receiver, said test signal receiver being adapted to receive said reference signal and said test signal from said first and second paths; and a test signal analyzer coupled to the test signal transmitter and the test signal receiver, said test signal analyzer being adapted to analyze said reference signal and said test signal and to responsively determine one or more impairment characteristics of said test path based on said comparison of said reference signal and said test signal.