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Gather using speak

POST 
/calls/:call_control_id/actions/gather_using_speak

Convert text to speech and play it on the call until the required DTMF signals are gathered to build interactive menus.

You can pass a list of valid digits along with an 'invalid_payload', which will be played back at the beginning of each prompt. Speech will be interrupted when a DTMF signal is received. The Answer command must be issued before the gather_using_speak command.

Expected Webhooks (see callback schema below):

  • call.dtmf.received (you may receive many of these webhooks)
  • call.gather.ended

Request ​

Path Parameters

    call_control_id stringrequired

    Unique identifier and token for controlling the call

Body

required

Gather using speak request

    payload stringrequired

    The text or SSML to be converted into speech. There is a 3,000 character limit.

    invalid_payload string

    The text or SSML to be converted into speech when digits don't match the valid_digits parameter or the number of digits is not between min and max. There is a 3,000 character limit.

    payload_type string

    Possible values: [text, ssml]

    Default value: text

    The type of the provided payload. The payload can either be plain text, or Speech Synthesis Markup Language (SSML).

    service_level string

    Possible values: [basic, premium]

    Default value: premium

    This parameter impacts speech quality, language options and payload types. When using basic, only the en-US language and payload type text are allowed.

    voice stringrequired

    Specifies the voice used in speech synthesis.

    • Define voices using the format <Provider>.<Model>.<VoiceId>.

    Supported Providers: -AWS: Use AWS.Polly.<VoiceId> (e.g., AWS.Polly.Joanna). For neural voices, which provide more realistic, human-like speech, append -Neural to the VoiceId (e.g., AWS.Polly.Joanna-Neural). Check the available voices for compatibility. -ElevenLabs: Use ElevenLabs.<ModelId>.<VoiceId> (e.g., ElevenLabs.eleven_multilingual_v2.21m00Tcm4TlvDq8ikWAM). The ModelId part is optional. To use ElevenLabs, you must provide your ElevenLabs API key as an integration identifier secret in "voice_settings": {"api_key_ref": "<secret_identifier>"}. See integration secrets documentation for details. Check available voices.

    For service_level basic, you may define the gender of the speaker (male or female).

    voice_settings

    object

    The settings associated with the voice selected

    oneOf

    api_key_ref string

    The identifier for an integration secret /v2/integration_secrets that refers to your ElevenLabs API key. Warning: Free plans are unlikely to work with this integration.

    The settings associated with the voice selected

    language string

    Possible values: [arb, cmn-CN, cy-GB, da-DK, de-DE, en-AU, en-GB, en-GB-WLS, en-IN, en-US, es-ES, es-MX, es-US, fr-CA, fr-FR, hi-IN, is-IS, it-IT, ja-JP, ko-KR, nb-NO, nl-NL, pl-PL, pt-BR, pt-PT, ro-RO, ru-RU, sv-SE, tr-TR]

    The language you want spoken. This parameter is ignored when a Polly.* voice is specified.

    minimum_digits int32

    Default value: 1

    The minimum number of digits to fetch. This parameter has a minimum value of 1.

    maximum_digits int32

    Default value: 128

    The maximum number of digits to fetch. This parameter has a maximum value of 128.

    maximum_tries int32

    Default value: 3

    The maximum number of times that a file should be played back if there is no input from the user on the call.

    timeout_millis int32

    Default value: 60000

    The number of milliseconds to wait for a DTMF response after speak ends before a replaying the sound file.

    terminating_digit string

    Default value: #

    The digit used to terminate input if fewer than maximum_digits digits have been gathered.

    valid_digits string

    Default value: 0123456789#*

    A list of all digits accepted as valid.

    inter_digit_timeout_millis int32

    Default value: 5000

    The number of milliseconds to wait for input between digits.

    client_state string

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

    command_id string

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

Responses ​

200: Successful response upon making a call control command.

Schema

    data

    object

    result string

default: Unexpected error

Schema

    errors

    Error[]

  • Array [

    • code integerrequired
    title stringrequired
    detail string

    source

    object

    pointer json-pointer

    JSON pointer (RFC6901) to the offending entity.

    parameter string

    Indicates which query parameter caused the error.

    meta object

  • ]

Callbacks ​

Request samples

curl -L 'https://api.telnyx.com/v2/calls/:call_control_id/actions/gather_using_speak' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Bearer <TOKEN>' \
-d '{
  "payload": "say this on call",
  "invalid_payload": "say this on call",
  "payload_type": "text",
  "service_level": "premium",
  "voice": "male",
  "language": "arb",
  "minimum_digits": 1,
  "maximum_digits": 10,
  "terminating_digit": "#",
  "valid_digits": "123",
  "inter_digit_timeout_millis": 10000,
  "client_state": "aGF2ZSBhIG5pY2UgZGF5ID1d",
  "command_id": "891510ac-f3e4-11e8-af5b-de00688a4901"
}'

Response samples

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