Patent ID: 6445731
Filing Date: 2002-09-03
Classification: H04L,H04M,H04Q

Abstract:
A method of operating a modem, having a receiver circuit including demodulation circuitry, the receiver circuit coupled to a communication channel during a continuous call connection, the method comprising the steps of:receiving a continuous analog signal from the communication channel, the analog signal including interspersed packet portions and non-packet portions; detecting non-packet portions of the analog signal; and deactivating substantial portions of the demodulation circuitry when analog signal non-packet portions are detected within a continuous call connection; the demodulation circuitry including a symbol decision circuit, a channel decoder and a framer, wherein the deactivating step includes deactivating the symbol decision circuit, the channel decoder and the framer when analog signal non-packet portions are detected within a continuous call connection; and the receiver circuit further including an echo cancellation circuit having a tap length, the method further including the step of reducing the tap length of the echo cancellation circuit when analog signal non-packet portions are detected within a continuous call connection.