Nortel Networks Corporation

Tomas Perez Morales

John Alexander Interrante

A method and apparatus for monitoring the performance of an echo canceler within a telephone communications network is disclosed. In accordance with the method and apparatus of the present invention, an embedded echo-cancellation performance monitoring circuit comprises three separate units, namely, a test data injection unit, an echo path simulator unit, and a test data extraction unit. The test data injection unit is utilized to inject test data into a serial data stream intended for an echo canceler. The echo path simulator unit is utilized to simulate an echo path by attenuating the test data in the serial data stream and to loop the test data in the serial data stream back to the echo canceler. The test data extraction unit is utilized to extract the test data from a send-out data stream exiting from the echo canceler.

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Lewisville, TX, United States of America

Tomas Perez Morales