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TESTING PULSE-TO-TONE CONVERTERS
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Pulse to Tone Coverter
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Old Dial Phone/pulse To Dual-tone Converter Support International Enhanced Edition Of European, American And Japanese Telephones - Instrument Parts & Accessories - AliExpress
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Rotary phone (pulse dial) to tone (DTMF) converter - YouTube
Building Your Own Pulse to Tone Converter « Adafruit Industries – Makers, hackers, artists, designers and engineers!
How to use the Dialgizmo pulse to tone converter with a rotary dial phone