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Telephone command apparatus

  • US 4,121,053 A
  • Filed: 05/05/1977
  • Issued: 10/17/1978
  • Est. Priority Date: 05/05/1977
  • Status: Expired due to Term
First Claim
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1. Telephone command apparatus comprising(a) signal transmission channel means,(b) input circuit means connectible to a telephone line and responsive to telephone ringing signals for conditioning said signal transmission means to transmit signals therethrough,(c) decoder means in said transmission channel means for providing a plurality of separate outputs representative, respectively, of a plurality of coded signals supplied as inputs thereto through said channel means,(d) a plurality of controllable means for effecting a plurality of operations, respectively,(e) a plurality of control means for actuating said respective controllable means, said control means being initially disabled to receive the outputs from said decoder means, and(f) access control means initially enabled to receive the outputs from said decoder means and responsive to a predetermined combination of said separate outputs representative of a predetermined combination of first coded signals supplied to said input circuit means for enabling said plurality of control means to receive from said decoder means separate outputs, respectively, representative of other coded signals supplied to said input circuit means, whereby said controllable means may be selectively actuated in response to said other coded signals supplied to said input circuit means from said telephone line.

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