Patent ID: 6011783
Filing Date: 2000-01-04
Classification: H04B

Abstract:
A circuit for measuring the performance of an echo canceler within a telephone communications network, wherein said circuit is embedded within said telephone communications network, said circuit comprising:a test data injection unit for injecting test data into a serial data stream intended for said echo canceler during an active call on said telephone communications network, wherein said test data injection unit further includes a multiplexer for serially shifting said test data into said serial data stream according to a predetermined period;an echo path simulator unit for simulating an echo path by attenuating said test data in said serial data stream and looping said test data in said serial data stream back to said echo canceler during said active call on said telephone communications network; anda test data extraction unit for extracting said test data from a send-out data stream exiting from said echo canceler during said active call on said telephone communications network.