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Telephone call screening device

  • US 5,995,603 A
  • Filed: 05/23/1997
  • Issued: 11/30/1999
  • Est. Priority Date: 05/23/1997
  • Status: Expired due to Term
First Claim
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1. A device for screening incoming telephone calls on a telephone line based on an authorized caller list, comprising:

  • means for extracting caller identification information from an incoming telephone call on the telephone line;

    means for comparing the caller identification information with the authorized caller list;

    means for allowing the incoming telephone call to ring normally when the caller identification information is contained in the authorized caller list; and

    means for allowing an alternative ringing when caller identification information is not contained in the authorized caller list.

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