> ## Documentation Index > Fetch the complete documentation index at: https://docs.cognigy.com/llms.txt > Use this file to discover all available pages before exploring further. # Voice Call With *Voice Call* mode, you can initiate a test call to hear how your voice AI Agent sounds. ## 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:,`. For all organizations, use `*`. * Configure a voice provider in the Project's [Voice Preview Settings](/ai/agents/test/voice-preview#set-up-a-speech-provider) and the AI Agent's [voice and language](/ai/agents/test/interaction-panel/overview). * Allow microphone access in your browser, and then in your device settings if needed. ## 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. ## More Information * [Voice Gateway Nodes](/ai/agents/develop/node-reference/voice/voice-gateway/overview) * [Voice Preview](/ai/agents/test/voice-preview) * [Voice Gateway](/voice-gateway/overview)