Integrated cellular/PCS-POTS communication system
Integrated filter and modular jack for voice over digital...
Interference canceling method and apparatus
ISDN power source detection circuit
Line interface circuit
Line interface circuit
Line interface circuit
Line termination for a telephone line
Listener echo cancellation for modems
Longitudinally balanced, dual voltage line-feed circuit
Low loss telephone circuit
Low voltage circuits powered by the phone line
Low-delay subband adaptive filter
Metallic current limiter
Method and apparatus for adapting a phone for use in network...
Method and apparatus for applying multiple speech processing fea
Method and apparatus for calculating DC offset in a digital...
Method and apparatus for canceling echo accounting for delay var
Method and apparatus for cancelling echo originating from a...
Method and apparatus for detecting a compatible phantom...