Digital signal and multiplex device
Digital signal channel distributor
Digital signal distributor
Digital signal multiplex communication system having signal path
Digital signal multiplex device
Digital signal multiplexing apparatus
Digital signal multiplexing apparatus and demultiplexing apparat
Digital signal processing arrangement for controlling the level
Digital signal processing system
Digital signal processor synchronous network
Digital signal repeating system
Digital signal subscriber loop and interface circuit
Digital signal switch
Digital signal switch system having space switch located between
Digital signal switching system
Digital signal time-division multiplex apparatus
Digital signal transmission apparatus
Digital signal transmission device
Digital signal transmission system
Digital signal transmission system