Patent ID: 8582443
Filing Date: 2013-11-12
Classification: G01R,H04B,H04L

Abstract:
1. An apparatus, comprising: a transmitter configured to transmit signals to a cable; a receiver configured to receive signals from the cable; an echo canceller connected to the transmitter and the receiver, wherein the echo canceller includes echo coefficients to reduce echo signals from the signals received by the receiver; and a cable tester configured to analyze the echo coefficients from the echo canceller to determine a plurality of peaks from the echo coefficients, wherein the plurality of peaks include (i) a near end peak that is a peak near a connection between the apparatus and the cable, and (ii) a tail end peak that is a peak some distance from the near end peak; wherein the cable tester is configured to determine a status of the cable by comparing an amplitude of the tail end peak to a threshold, wherein the status of the cable includes a normal status, a short status, or an open status.