Method and system for eliminating acoustic echos in a digital te

Method and system for extending backup battery life in...

Method and system for providing DC power on local telephone...

Method and system for scaleable near-end speech cancellation...

Method and system for selecting a frequency for...

Method for adjusting a ringing signal current in a...

Method for adjusting the balancing impedance of a hybrid junctio

Method for avoiding self-oscillation in conjunction with echo ca

Method for controlling echo canceling in an echo canceller

Method for controlling power losses associated with line interfa

Method for customizing operation of a battery feed circuit in a

Method for customizing operation of a line interface circuit in

Method for determining the location of echo in an echo canceller

Method for extending the useful life of a cordless telephone...

Method for optimizing stability of a line interface circuit...

Method for optimizing the transmission properties and the...

Method for powering telephone apparatus and telephone apparatus

Method for processing telephone signals supplied by an...

Method for separating narrowband and broadband services on a...

Method for synthesizing an echo path in an echo canceller