DTMF stands for Dual-Tone Multi-Frequency.

In layman terms, DTMF is the phone digits we use to dial numbers. DTMF signaling can happen in-band (within the voice of a session itself) or out-of-band (in external signaling and not as part of the voice session).

WebRTC allows sending DTMF events as part of the RTP packets.


About WebRTC Glossary

The WebRTC Glossary is an ongoing project where users can learn more about WebRTC related terms. It is maintained by Tsahi Levent-Levi of BlogGeek.me.

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