Terminating call connections in a magnetic-drum-controlled electronic telephone exchange
R.G. Knight, R.D. Allum · Proceedings of the IEE Part B Electronic and Communication Engineering · 1960
In an electronic telephone exchange shortly to be installed Highgate Wood and using a time-division-multiplex principle, magnetic drum is used to search for semi-permanent information stored on the drum relating to called subscribers' lines. A temporary store associated with each line is used to determine whether a connection possible, and if so, information relating to the line is passed to other sections of the exchange, so that a connection can be established between the calling and called lines.