Digital data transmission system with time division/packet trans
Digital debouncing and storage apparatus for use in a telephone
Digital demodulator for frequency-division-multiplexed signals
Digital dual channel communication terminal
Digital duplex communication system
Digital duplex transmission system
Digital electronic loop crossconnect and carrier system
Digital electronic switching systems
Digital encoder and decoder synchronization in the presence of l
Digital exchange and its control method
Digital exchange system
Digital filter bank
Digital filter tree
Digital filter-type frequency demultiplexing device
Digital filtering
Digital fixed radio access system providing local mobility
Digital frequency receiver
Digital frequency sender
Digital full-duplex transceiver
Digital information commodities exchange