A 4-wire solid-state switching system: Application, concept, and configuration

A design task begun in January, 1960, has resulted in the delivery of a new 4-wire solid-state switching system. This represents the first application of a fully electronic switchboard to provide real-time switched communications in an operational military network; fixed-site and mobile switching centers, as well as a variety of special and general purpose subscriber instruments, are included in the switching system. This paper presents a general discussion of the application, concept, and configuration of the over-all equipment; detailed descriptions of the major equipment groups are available.^1–4