Apparatus for utilizing an a.c. power line to couple a remote terminal to a central computer in a communication system

摘要: A system for interfacing a telephone party line extending from central computer with number of remote inquiry terminals. The includes an a.c. power disposed between the and terminals, buffer modem (modulator/demodulator) connected line, plurality terminal modems each being associated one terminals respective terminal. communication signals received are applied to that transformed suitable form transmission over line. then transform signal back receipt by its Similarly, various transmitted modem, where they again into retransmission computer.