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Method and apparatus for automatically establishing telephone communication links

  • US 4,518,822 A
  • Filed: 03/08/1983
  • Issued: 05/21/1985
  • Est. Priority Date: 04/03/1981
  • Status: Expired due to Fees
First Claim
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1. Apparatus for establishing a telephone communications link between a calling location and a remote location comprisinga central transmitter station including first transmitter modulation means for modulating a signal to be transmitted with programming, using a first modulation technique, for transmission of the programming to manually controllable first receivers having first receiver demodulation means responsive to signals modulated with said first modulation technique for the reception and demodulation of said modulated signal to allow selective perception of the programming by members of the public,second modulation means coupled to said central transmitter station for modulation of the signal to be transmitted with a request to answer signal utilizing a second modulation technique to which said first receiver demodulation means are not primarily responsive,at least one second receiver, each of said second receivers having second receiver demodulation means responsive to signals modulated with said second modulation technique for the reception and demodulation of the transmitted signal to provide the request to answer signal at the respective remote location,phone control means coupled to each of said second receivers for receiving said request to answer signal and for providing a phone control signal in response thereto, andphone answering means coupled to each of said phone control means and a phone line and being responsive to said phone control signal and a ring signal on the phone line to automatically terminate the ring signal and hold the phone line upon receipt of a call.

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