H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/36, 379/73
H04M 1/66 (2006.01)
Patent
CA 1125937
ABSTRACT OF THE DISCLOSURE A telephone toll restrictor circuit comprising first and second input terminals adapted to be connected to first and second telephone leads. A circuit is provided for sensing dial pulses connected to at least one of the input terminals. A dial pulse counter is responsive to the sensing circuit. A relay circuit is provided to restrict an outgoing telephone call connected to one of the leads. A timer is responsive to the sensing means. The relay circuit to restrict an outgoing telephone call is responsive to the timer after a predetermined time. The predetermined time is less than the time out cycle of a predetermined telephone central office, whereby the said relay circuit restricts an outgoing telephone call switches to the restrict mode after the occurrence of the said predetermined time so that a restrictable call is not allowed to be made because of central office time out. A pulse generator is also provided for resetting the timing cycle of the timer after each dial pulse. The pulse generator is connected to the pulse sensing circuit and further connected to the timer. The pulse generating means generates a reset pulse for each dial pulse.
376125
Akzona Incorporated
Swabey Ogilvy Renault
LandOfFree
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