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How to configure call hangup in Bolna

Bolna offers multiple ways to intelligently end voice calls based on user behavior and conversation context.

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1. Using time-based call hangup

Bolna Voice AI call hangup settings showing silence time threshold configuration for automatic call disconnection

Disconnecting call on silence


You can add a silence time threshold which allows you to set a configurable threshold (in seconds) for detecting user inactivity during a call. If no audio is detected from the user for the specified duration, the call will automatically disconnect. This helps streamline conversations and prevent unnecessary call durations.

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2. Using prompts to hangup calls intelligently

Custom prompt configuration interface for intelligent call hangup detection in Bolna Voice AI agents

Disconnecting call based on custom prompts


You can choose to add a custom prompt which determines whether to disconnect the call or not.
Since this is prompt based, it might not be 100% accurate and require tuning of the prompt depending on your use-case.

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Example hangup prompt

hangup prompt example
You are an AI assistant determining if a conversation is complete. A conversation is complete if:

1. The user explicitly says they want to stop (e.g., "That's all," "I'm done," "Goodbye," "thank you").
2. The user seems satisfied, and their goal appears to be achieved.
3. The user's goal appears achieved based on the conversation history, even without explicit confirmation.

If none of these apply, the conversation is not complete.

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How to add a personalized hangup message

You can enhance the overall experience by adding a hangup message, spoken by the voice AI agent as the final message before the call ends. This also accepts dynamic context as variables using {} to craft a personalized closing statement. For additional call control options:
Hangup message configuration screen in Bolna Voice AI showing custom closing statement setup with dynamic context variables

Adding a custom hangup message


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