Telephone controller apparatus

Details Telephone controller apparatus Telephone controller apparatus

1990-11-05

1993-11-23

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Remote control

379184, 379387, H04M 1100

Patent

active

052651541

ABSTRACT:
Apparatus for enabling or disabling a selected telephone. A control signal having a unique predetermined frequency, which corresponds to a desired state of the selected telephone, is transmitted from a transmitter through standard telephone lines. The telephone is connected to a receiver, having one of a plurality of resonant circuits each tuned to one of the unique predetermined frequencies, which receives the control signal. When the frequency of the control signal matches the tuned frequency of a resonant circuit, the receiver connects or disconnects accordingly the selected telephone from the telephone lines thereby enabling or disabling, respectively, the selected telephone.

REFERENCES:
patent: 3949172 (1976-04-01), Brown et al.
patent: 3967076 (1976-06-01), Balzer
patent: 4070549 (1978-01-01), Baker
patent: 4405839 (1983-09-01), Groff
patent: 4418244 (1983-11-01), Edgar
patent: 4418333 (1983-11-01), Schwarzbach et al.
patent: 4459434 (1984-07-01), Benning et al.
patent: 4480154 (1984-10-01), Klee
patent: 4538031 (1985-08-01), Benning et al.
patent: 4703499 (1987-10-01), Fossas et al.
patent: 4755792 (1988-07-01), Pezzolo et al.
patent: 4782322 (1988-11-01), Lechner et al.
patent: 4899372 (1990-02-01), Wahi et al.
patent: 4924499 (1990-05-01), Serby
patent: 4975943 (1990-12-01), Weber et al.
patent: 5031082 (1991-07-01), Bierend
patent: 5090052 (1992-02-01), Nakajima et al.

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