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Remote signalling to a telephone line utilizing power line carrier signals

  • US 4,058,678 A
  • Filed: 04/07/1976
  • Issued: 11/15/1977
  • Est. Priority Date: 04/07/1976
  • Status: Expired due to Term
First Claim
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1. A power line telephone extension system for carrying coded signals from (1) a subscriber'"'"'s telephone line of a conventional telephone communication system wherein a separate telephone line is provided from a central switching system at a central station to each subscriber at the subscriber'"'"'s premises and each subscriber'"'"'s telephone line includes at least two wires, the tip line and the ring line to (2) one or more remote locations at the subscriber'"'"'s premises, over available electric power wires and power wire connector outlets comprising at the subscriber'"'"'s premises:

  • a. a subscriber'"'"'s master location near said subscriber'"'"'s telephone line and near one of said power wire connector outlets,b. one or more remote locations each near a power wire connector outlet; and

    c. at the master location;

    d. a master receiver having its input electrically coupled directly to the telephone line for receiving the coded signals carried on the telephone line,e. a master transmitter for transmitting the coded signals that are received to the available power wires at the subscriber'"'"'s premises, andf. an electrically reactive coupling device for coupling the output of the master transmitter to said available power wires via a power wire connector outlet,g. whereby, said power wires carry the coded signals including a coded signal addressed to a particular remote location,h. a coded address signal detector at the particular remote location,i. a utilization device at said remote location, andj. means at the remote location responsive to the detector for detecting the particular coded address signals for controlling the utilization device,k. whereby the utilization device is controlled by the coded telephone line signals.

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