> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tryhamsa.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Call Behavior Settings

> Configure response timing, interruptions, inactivity handling, and call duration for your single prompt agent

## Overview

Call behavior settings control the timing and flow of your agent's conversations. They are found in the **Call Settings** section of your agent's configuration.

## Response Delay

How long the agent waits after detecting the user has stopped speaking before generating a response.

**Range:** 100–1500ms
**Default:** 400ms
**Increment:** 100ms

A shorter delay feels more responsive; a longer delay gives users more time to finish their thoughts without being interrupted.

## Interruption Handling

Controls whether users can speak while the agent is talking, cutting off the agent's response.

**Toggle:** Interrupt (on/off)
**Default:** On

When enabled, the agent stops speaking as soon as the user starts talking. When disabled, the agent completes its full response before listening again.

## User Inactivity Timeout

How many seconds of silence trigger the agent to check if the user is still on the line.

**Range:** 5–60 seconds
**Default:** 15 seconds

After the timeout, the agent proactively prompts the user. You can define what the agent says in your prompt.

## Max Call Duration

The maximum length a call can run before being automatically terminated.

**Range:** 30 seconds – 1 hour
**Default:** 300 seconds (5 minutes)

Most calls should end naturally via Smart Call End. Max Call Duration is a safety net for runaway calls.

## Ambient Sound

Adds subtle ambient sound to the agent's audio.

**Toggle:** Ambient Sound (on/off)
**Default:** Off

<Warning>
  Do not enable both Background Noise and Noise Cancellation — they conflict and create audio artifacts.
</Warning>

## Thinking Voice

Plays a thinking/processing sound between responses, making the agent feel more natural during pauses.

**Toggle:** Thinking Voice (on/off)
**Default:** Off

## Minimum Interruption Duration

The minimum duration of speech required to register as an interruption.

**Range:** 0.2–1.5 seconds
**Default:** 0.5 seconds

Increasing this reduces false interruptions from background noise or brief sounds.

## VAD Activation Threshold

Voice activity detection sensitivity — how loud a sound needs to be before the system considers it speech.

**Range:** 0.2–0.9
**Default:** 0.5

Higher values make the system less sensitive (ignores quieter sounds); lower values pick up more input.

## Wait for User to Speak First

Controls whether the agent speaks first or waits for the caller to initiate.

Options:

* **Never** — Agent always speaks first
* **Always** — Agent always waits
* **Outbound calls only** — Agent waits only on outbound calls

## Next Steps

<CardGroup cols={2}>
  <Card title="Intelligence Features" href="./intelligence-features">
    Enable smart features like gender detection and smart call end
  </Card>

  <Card title="Write Effective Prompts" href="./write-prompt">
    Optimize your agent's instructions for better behavior
  </Card>

  <Card title="Voice Settings" href="./voice-settings">
    Choose the right voice and language settings
  </Card>

  <Card title="Testing Agents" href="/agents/testing/introduction">
    Test your agent before going live
  </Card>
</CardGroup>