PROGRAMME-CONTROLLED DATA SWITCHING SYSTEMS

摘要

A program controlled data switching system wherein the connection circuits include storage devices and gate switching elements; the transfer of items of information occurring on the lines into the storage devices is controlled in groups by means of a central interrogation pulse train. Initially gate switching elements emit a request criterion; to identify the connection circuits transmitting a request criterion, for each position or digit of the code used to characterize the connection circuits there is provided a series of decentralized identification devices which are arranged in stages in accordance with the known coordinate principle, and are connected to one another via request and resetting lines; means are provided to code and store the identification result.