> ## Documentation Index
> Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Hangup and Disconnect Bolna Voice AI calls
> Discover methods to disconnect live Bolna Voice AI calls. Implement time-based hangups, custom prompts, and personalized messages for seamless call termination.
## How to Configure Call Hangup
Bolna offers multiple ways to intelligently end voice calls based on user behavior and conversation context.
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## Hangup Methods
Set a `silence time` threshold (in seconds) for detecting user inactivity. If no audio is detected for the specified duration, the call disconnects automatically, preventing unnecessary call durations.
Add a custom prompt that evaluates whether the conversation is complete. The LLM assesses the conversation context and decides when to end the call.
Since this is prompt-based, it may not be 100% accurate. Tune the prompt based on your use case for best results.
**Example hangup prompt:**
```text hangup prompt example theme={"system"}
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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## Personalized Hangup Message
Add a closing message spoken by the agent as the final message before the call ends. This accepts [dynamic context variables](/using-context#custom-variables) using `{}` for a personalized closing statement.
Use variables like `{first_name}` in your hangup message for a personal touch, e.g., *"Thank you {first_name}, have a great day!"*
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## Call Duration Limits
Set a maximum call duration (in seconds) for automatic termination. Once the limit is reached, the call ends automatically — a safety net against runaway calls.
### Duration limits vs. hangup prompts
| Feature | Duration Limits | Hangup Prompts |
| ----------------- | --------------------------------- | ----------------------------------- |
| **Trigger** | Hard time-based cutoff | Context-aware conversation analysis |
| **Accuracy** | 100%, always triggers at set time | Prompt-dependent, may need tuning |
| **Use case** | Safety net for runaway calls | Natural, intelligent call endings |
| **Configuration** | Set duration in seconds | Write a custom evaluation prompt |
**Use both together**: hangup prompts for natural conversation endings, duration limits as a hard safety net.
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## Related Features
Monitor call statuses in real time
Understand who ended the call and why
Understand how call duration affects cost