What is DTMF tone.

What is DTMF Tone

When a telephonic key is pressed, sounds are produced called Dual Tone Multi Frequency, or DTMF for short. Otherwise known as the “touch tone,” a different frequency is assigned to each key in the telephone – one low frequency and another high frequency – that sound simultaneously when a key is pressed. This two-tone combination makes it nearly impossible to reproduce with the human voice.

Once primarily used for telephone signaling to and from the local exchange, it now has a variety of applications in telecommunications and call center industries. DTMF technology supports acoustic transfer, which means that DTMF tones can be transmitted by a speaker and received by a microphone. Today, this technology is the dialing and switching communication standard.

This white paper will explore the following:

  • The history and evolution of DTMF
  • How it works
  • Technical criteria and applications
  • The advantages of using DTMF technology
Download the paper. See the infographic.

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