Differential echo cancellation receiver with dynamic...
Differential input stage for electronic equipment,...
Differential longitudinal amplifier for a subscriber line interf
Differential output stage for electronic equipment providing...
Digital access arrangement circuitry and method having a...
Digital access arrangement circuitry and method having...
Digital access arrangement circuitry and method having...
Digital data loopback device
Digital direct current feed control for a communication system
Digital echo canceller comprising a double-talk detector
Digital gyrator
Digital isolation apparatus and method
Digital isolation system with data scrambling
Digital isolation system with low power mode
Digital line card for interfacing a remotely located digital tel
Digital signal transmitting circuit for telephone network
Digital subscriber line modem utilizing echo cancellation to...
Digital switching system with shared analog line
Digital switching system with shared analog line
Digital telephone system noise reduction circuit