Telephone answering machine with non-volatile memory

Details Telephone answering machine with non-volatile memory Telephone answering machine with non-volatile memory

1992-10-30

1995-05-23

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

Dynamic audio signal recording or reproduction

379 2, 379 27, 379 32, 379 67, 379387, 379413, H04M 164, H04M 100

Patent

active

054188415

ABSTRACT:
An automatically answerable telephone apparatus comprises a control unit having a rewritable memory for storing control data for automatically responding operation and operative to control a line signal processor and a recording and reproducing device, a writable non-volatile memory, a power source for supply a power supply voltage, a capacitor connected for holding the power supply voltage, and a power failure detector, wherein the control unit is operative, with the power supply voltage discharged by the capacitor to remove operating portion other than the control unit and the writable non-volatile memory from the power source and to transfer the control data for automatically responding operation from the rewritable memory to the writable non-volatile memory for preserving the control data when power failure occuring in the power source is detected by the power failure detector.

REFERENCES:
patent: 4726053 (1988-02-01), Mock
patent: 4731815 (1988-03-01), Hanscom et al.
patent: 4800533 (1989-01-01), Arakawa
patent: 4815122 (1989-03-01), Shefler
patent: 4881205 (1989-11-01), Aihara
patent: 4959852 (1990-09-01), Kern et al.
patent: 5182769 (1993-01-01), Yamaguchi et al.
Patent Abstracts of Japan, vol. 15, No. 355 (E-1109) Sep. 9, 1991 & JP-A-31 39 051 (Toshiba Corporation) Jun. 13, 1991.
Patent Abstracts of Japan, vol. 14, No. 168 (E-912) Mar. 30, 1990 & JP-A-20 23 760 (Toshiba Corporation) Jan. 25, 1990.

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