Ringing signal generator

Details Ringing signal generator Ringing signal generator

1979-04-09

1981-08-04

Popek, Joseph A.

179 51AA, H04M 500

Patent

active

042824109

ABSTRACT:
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 it's particular frequency. A programmable oscillator generates the required frequencies under control of a time slot generator which defines the time slot during which each frequency is to be generated.

REFERENCES:
patent: 3581020 (1971-05-01), Ribner
patent: 4061909 (1977-12-01), Bryant

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