73450099
Oct 28, 1983
Oct 23, 1984
Data Concentrator Systems for Linking Clusters of Remote Terminals to Minicomputers Comprised of Synchronous Statistical Multiplexers, Synchronous Multiplexers, Modems, Synchronous Multiplexers, Mainframes, Control Modules, Expander Modules, Power Supplies, Rack Mount Adapters and Cables
Electrical and Scientific Apparatus