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DTMF (Dual Tone Multiple Frequency)
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Pulse-to-Dual-Tone Multi-Frequency DTMF Converter Standard Edition Old Dial Phone/Pulse-to-Dual-Tone Module
Touch Tone (DTMF) – Billie's Phone Museum
What is DTMF technology? - Quora
PDF) DTMF based security Robot-SECBOT an ease for un-manned security
Dual Tone Multi-Frequency signal generation and testing
What is DTMF technology? - Quora
PDF) GENERATION AND DETECTION OF DUAL TONE MULTI-FREQUENCY (DTMF) SIGNALS
Configure Miscellaneous Settings in Regional Voice Parameters on SPA100 Series - Cisco
DTMF meaning: What are DTMF tones?
DTMF - Wikipedia
