Apparatus and method for monitoring full duplex data communicati
Circuit method and system for transmitting information
Determining echo return loss in echo cancelling arrangements
Device for measuring echo return loss in a two-two wire line sys
Digital telephony card for use in an operator system
Double-talk detecting apparatus, echo canceller using the...
Echo-canceling system and method using echo estimate to modify e
Fault characterization using information indicative of echo
Line disconnection detection circuit for echo-cancelling transce
Line impedance matching using dynamically generated transfer...
Local loop test arrangement in an echo canceller based full dupl
Method and apparatus for digitally controlling gain in a talking
Method and apparatus for echo canceling accounting for compandin
Method and apparatus for inband testing of an echo canceller
Method and apparatus for inclusive echo canceller testing
Method and apparatus for inclusive echo canceller testing
Method and apparatus for performing either tone analysis on...
Method and apparatus for performing transmission line testing
Method and apparatus for testing echo canceller performance
Method and system for sparing echo cancellers