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v53

OpenAPI 3.1.0raw.githubusercontent.com2026-08-041,1941,9384.1 MB
Call Commands

Send DTMF

Sends DTMF tones from this leg. DTMF tones will be heard by the other end of the call.

Expected Webhooks:

There are no webhooks associated with this command.

post/calls/{call_control_id}/actions/send_dtmf

Path parameters

call_control_idstring required

Unique identifier and token for controlling the call

Request body

client_statestring

Use this field to add state to every subsequent webhook. It must be a valid Base-64 encoded string.

command_idstring

Use this field to avoid duplicate commands. Telnyx will ignore any command with the same command_id for the same call_control_id.

digitsstring required

DTMF digits to send. Valid digits are 0-9, A-D, *, and #. Pauses can be added using w (0.5s) and W (1s).

duration_millisinteger

Specifies for how many milliseconds each digit will be played in the audio stream. Ranges from 100 to 500ms

Example request

{
  "client_state": "aGF2ZSBhIG5pY2UgZGF5ID1d",
  "command_id": "891510ac-f3e4-11e8-af5b-de00688a4901",
  "digits": "1www2WABCDw9",
  "duration_millis": 500
}

Response

Successful response upon making a call control command.

Example response

{
  "data": {
    "result": "ok"
  }
}