Method and apparatus for telephone access security

Details Method and apparatus for telephone access security Method and apparatus for telephone access security

1984-09-07

1986-12-02

George, Keith E.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

178 2208, H04M 1100

Patent

active

046266232

ABSTRACT:
The invention comprises a method and apparatus for providing secure access to a restricted access device, associated with a telephone answering unit at a first location from a second location across a telephone system. The method comprises the steps of at the first location, automatically responding to a telephone call to the first location from the second location to automatically generate and deliver a request signal requiring a coded response to the second location across the telephone system, at the second location, automatically responding to the request signal to automatically generate and deliver a coded transmit signal to the first location across the telephone system, and, at the first location, automatically responding to the coded transmit signal to automatically establish communication connection between the first and second locations across the telephone system. The apparatus comprises a receiving unit operable in response to a telephone call from a telephoning unit to automatically generate a request signal requiring a coded response from the telephoning unit, a transmitting unit being responsive to the request signal and operable to automatically generate and deliver a coded transmit signal, and, a switch circuit means in the receiving unit responsive to the coded transmit signal to automatically establish communication connection between the telephoning unit and the answering unit.

REFERENCES:
patent: 3984637 (1976-10-01), Caudill et al.
patent: 4114139 (1978-09-01), Boyd et al.
patent: 4430728 (1984-02-01), Beitel et al.
patent: 4520233 (1985-05-01), Smith
patent: 4546213 (1985-10-01), Dick
Computer Buyer's Guide and Handbook, Sep. 1984, p. 106, "In Depth: Teltone's Teleport 300 Touch-Tone".

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