Apparatus and method for controlling an echo canceler
Apparatus and method for echo characterization of a communicatio
Apparatus and method for noise reduction for a full-duplex speak
Apparatus for controlling a current supply device
Apparatus for detecting and discriminating phase jumps in a peri
Apparatus in a telecommunication system for supplying power to a
Apparatus, systems and methods for isolating ADSL signals...
Architecture for minimum loop current during ringing and...
Arrangement and method for rapidly detecting double talk in long
Arrangement for canceling interference in transmission systems
Arrangement for communicating messages via a low-voltage...
Arrangement for suppressing echoes in a digital portable telepho
Arrangement for the control of an echo canceller
Assembly and a telecommunications module for use therein
Automatic echo cancellation for an integrated services digital n
Automatic speech recognition using echo cancellation
Backup battery power supply for microprocessor based telephones
Backup power supply at subscriber terminal
Battery boosted dial memory
Battery feed circuit