Digital transmultiplexer with automatic threshold controller
Digital type level regulator
Digital voice interpolation system for pcm systems
Digital voter for multi-site pst rf trunking system
Digital-to-analogue converter
Digital/analog subterminal
Diphase transmission system
Distributed bus control communication protocol
Distributed control system for multiple random access to the...
Distributed frame processing for time division multiplexing
Distributed switching architecture
Distributed synchronization method and system
Distributed timing control for a distributed digital...
Distributed-structure message switching system on...
Distribution device for a triple clock generating signals...
Distributor
Diversity receivers
Divided channel telegraph system
Domestic satellite communication system
Double data rate flip-flop