Digital transceiver for full-duplex transmission of binary signa
Digital transmission apparatus for subscribers having switching
Digital transmission channel framing
Digital transmission including add/drop module
Digital transmission interconnect signal
Digital transmission system
Digital transmission system
Digital transmission system
Digital transmission system
Digital transmission system
Digital transmission system for multiplexing and demultiplexing
Digital transmission system, transmitter and receiver for use in
Digital transmission systems
Digital transmitting system
Digital transmultiplexer
Digital trunk adapter terminal unit
Digital two-to-four wire converter for full duplex signals
Digital two-way radio-communication system using single frequenc
Digital voice conferencer
Digital voice conferencing apparatus in time division multiplex