Ringing signal generator

Details Ringing signal generator Ringing signal generator

H - Electricity

04

M

379/13

H04M 3/02 (2006.01) H04M 19/02 (2006.01) H04Q 5/10 (2006.01)

Patent

CA 1145494

TITLE RINGING SIGNAL GENERATOR ABSTRACT OF THE DISCLOSURE A telephone ringing signal generator which sequentially produces a plurality of ringing signals each of a different frequency. Each of a plurality of tone ringers connected to the generator will ring only in response to its particular frequency. A programmable oscillator generates the required fre- quencies under control of a time slot generator which defines the time slot during which each frequency is to be generated.

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