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Paul V DeLuca, John J Gazzo Jr, Vincent F Santulli, Errol Siegel, Vito Mannino: Automated telephony testing and polling apparatus and system. Porta Systems Corporation, Philip D Amins, July 13, 1976: US03969594 (23 worldwide citation)

Line condition reporting and subscriber polling apparatus employs a central processor for accessing subscriber cable pair via one of plural interface circuits, a trunk selection matrix, a test or no-test trunk, and the subscriber's central office.


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DeLuca Paul V, Santulli Vincent F, Gazzo Jr John J, Manos George, Mickowski John: Automated telephony testing and polling apparatus. Porta Systems Corporation, Amins Philip D, October 15, 1974: US3842218 (19 worldwide citation)

Line condition reporting and subscriber polling apparatus employs a central processor for accessing subscriber cable pair via one of plural interface circuits, a trunk selection matrix, a test or no-test trunk, and the subscriber's central office.Subscriber lines may be seized in accordance with man ...


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