Telephonic communications – Telephone line or system combined with diverse electrical... – Remote control
Patent
1993-11-12
1995-08-29
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Remote control
379180, 379201, 379373, H04M 1100, H04M 342
Patent
active
054467845
ABSTRACT:
The telephone line has a multiple ringing patterns capacity, and the apparatus couples the telephone line to the telephone line subscriber device when a particular one of the ringing patterns is present at the telephone line. The particular ringing pattern consists of at least two ringing bursts separated by a gap which is equal to or less than a predetermined time interval. The apparatus includes logic circuitry which is set by the first burst and which, when the gap between the first burst and the second burst is equal to or less than the time interval, effects a low resistance path between an input jack and an output jack of the apparatus. The input jack is connectable to a wall socket for the telephone line, and the output jack is connectable to a socket on the telephone subscriber device. Preferably, the telephone subscriber device is a telefax machine.
REFERENCES:
patent: 3870822 (1975-03-01), Matthews
patent: 4587380 (1986-05-01), Curtin
patent: 4741024 (1988-04-01), Del Monte et al.
patent: 4782518 (1988-11-01), Mattley
patent: 4803719 (1989-02-01), Ulrich
patent: 5142569 (1992-08-01), Peters
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