DTMF

The dtmf verb generates a string of DTMF digit signals, which are transmitted as RTP payloads according to RFC 2833.

{
  "verb": "dtmf",
  "dtmf": "0276",
  "duration": 250
}

Configuration

The following table lists the available parameters:

Parameter	Type	Description	Required
dtmf	string	A string containing a sequence of DTMF digits (`0-9`, `*`, `#`).	Yes
duration	number	The length of each digit in milliseconds. The default value is `500`.	No

Last modified on June 10, 2026