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Telephone privacy system

  • US 4,598,179 A
  • Filed: 06/28/1984
  • Issued: 07/01/1986
  • Est. Priority Date: 06/28/1984
  • Status: Expired due to Fees
First Claim
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1. A telephone privacy system for use in conjunction with a user'"'"'s telephone line and receiver/transmitter unit for permitting the user to screen incoming calls, without answering the calls, on the basis of a coded identification signal transmitted by a calling party on the telephone line, said system comprising:

  • first means responsive to said coded identification signal received on the user'"'"'s telephone line for automatically providing a plurality of audio tones in a sequence which is determined by the receive coded identification signal; and

    second means for rendering said plurality of audio tones audible externally of said system;

    wherein plural different coded identification signals can be employed in said system to uniquely identify respective authorized callers, and wherein said first means comprises;

    decoder means responsive to received coded identification signals for providing respective decoded address signals representing the coded identification in the received signal; and

    tune generator means for providing said plurality of tones as a recognizable tune determined by the decoded address signal.

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