Dual-tone multi-frequency

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telecommunication signaling system

Risorse esterne

identificativo Freebase	/m/02c8p^[1]
identificativo Microsoft Academic	21277212
identificativo Encyclopædia Britannica Online	technology/dual-tone-multifrequency soggetto indicato come: dual-tone multifrequency

stabilimento industriale

POTS

switching technology

Dual-tone multi-frequency signaling