Electronic tone ringer

Details Electronic tone ringer Electronic tone ringer

H - Electricity

04

M

379/18

H04M 1/00 (2006.01) H04M 19/04 (2006.01)

Patent

CA 1149090

TITLE ELECTRONIC TONE RINGER ABSTRACT OF THE DISCLOSURE An electronic tone ringer for use in tele- phone substations. This circuit operates in response to conventional ringing signals and generates a single tone alert signal interrupted at a low frequency. The audible tone alert signal is generated by a piezo- ceramic transducer.

375093

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