"Wild" mobile disable circuit

Details "Wild" mobile disable circuit "Wild" mobile disable circuit

1974-09-23

1976-02-03

Cooper, William C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325 37, 343227, H04Q 704

Patent

active

039366162

ABSTRACT:
A circuit for disabling, or shutting down, the transmitter of a mobile telephone unit when the unit is not connected to another party is disclosed. When such a "wild" mobile is sensed, a sequence of idle and seize audio tones are sent and transitions therebetween are counted. When a specific number of counts are counted a disable signal is developed. The counter is continually reset and does not count when the handset is on hook. When the handset is off hook and the mobile is talking to a party voice falsing of the counter is prevented by a timer circuit.

REFERENCES:
patent: 3098212 (1963-07-01), Creamer, Jr.
patent: 3339141 (1967-08-01), Rothewbuhler et al.
patent: 3571519 (1971-03-01), Tsimbidis
patent: 3806663 (1974-04-01), Peek et al.
patent: 3831175 (1974-08-01), Mazalas

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