Digital voice recording and reproduction and telephone network s

Digital voice summing for teleconferencing

Digital voice switch for a multi-port conference circuit

Digital-transmission/analog-transmission changeover apparatus

Digital/audio interactive communication network

Diplexer and multiplexer

Diplexer for the separation of a signal and of a supply current

Direct digital access telecommunication system with signaling bi

Direct memory access controller in an integrated circuit

Direct sequence CDMA coherent uplink detector

Direct sequence code division multiple access (DS-CDMA) communic

Directional coupler for optical communications system

Directly programmable distribution element

Disk array memory system having bus repeater at disk backplane

Dispersed switching telecommunication system

Disposition filtering of messages using a single address and pro

Distributed address decoding for bus structures

Distributed autonomous object architectures for network layer ro

Distributed bit switching of a multistage interconnection networ

Distributed bit-by-bit destuffing circuit for byte-stuffed multi