This is what enabled telephone calls to occur.
Before DTMF: Rotary Dial Phones and Pulse DialingĪt the time of their first arrival in homes, telephones were physically connected to a local telephone exchange building through wires that left a phone’s handset and ended at the exchange. In this blog post, we’re focusing on one of those acronyms: DTMF, which stands for dual-tone multi-frequency signaling. You’d be excused for thinking that these letters are what you’d find when you dip your spoon into some alphabet soup, but they actually refer to some important telephone technology! The telephone world is full of these acronyms, and while you may not know what they stand for or how they work, they play a big role in our daily lives.
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