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Updated in 2026.22.0 With Voice Call mode, you can initiate a test call to hear how your voice AI Agent sounds.

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Prerequisites

  • Activate voice call:
    • For SaaS installations, contact the support team to activate the feature.
    • For on-premises installations, activate the feature by adding FEATURE_ENABLE_VOICECALL_WHITELIST in values.yaml and assigning the corresponding organization IDs. For example, FEATURE_ENABLE_VOICECALL_WHITELIST:<organization-1-id>,<organization-2-id>. For all organizations, use *.
  • Configure a voice provider in the Project’s Voice Preview Settings and the AI Agent’s voice and language.
  • Allow microphone access in your browser, and then in your device settings if needed.
If the text-to-speech provider of the project is Amazon Polly, the call ignores the TTS Engine default of the Node. It uses the first engine that the selected voice supports, in this order: Standard, Neural, and Generative.

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How to Use Voice Call Mode

To start a test call with the AI Agent, click the voice-call tab in the Interaction Panel and click start-call at the bottom. To end the call, click end-call. During a call, you can:
  • Monitor the call duration. The timer displayed next to the end-call button shows how long the call has been active.
  • Send DTMF tones. Click dialpad to open a dialpad and send touch-tone (DTMF) signals during the call. With the dialpad, you can enter codes or navigate menus during a call.
  • Follow the conversation. View the real-time conversation transcript in the Interaction Panel to track the call.
Voice call mode has a timeout. If you don’t provide any voice input for a period, the call ends automatically to prevent unnecessary connection time. To view and analyze the payload of a voice input, click expand indicated in the message fields.

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More Information

Last modified on October 27, 2026