A 4-Wire Solid-State Switching System: Time Division Switching Network

The transmission path of an electronic switching center utilizing time division multiplexing, its associated contact control circuits, and contact memory are discussed. Line, interhighway, signal injector and highway discharge switches are incorporated in this transmission network. The design of an accurate and flexible transmission measuring device was necessary so that some of the established transmission characteristics could be satisfactorily measured. The transmission characteristics were thus proven to be well within specified limits.