***

title: <Icon size="6" icon="fa-duotone fa-phone-arrow-down-left" />  Inbound calls
subtitle: Flows where the caller initiates the session
------------------------------------------------------

Inbound flows start when a caller reaches your destination (phone number, WhatsApp destination, SIP username, or app user alias) and a routing rule launches your scenario.

### Use `AppEvents.CallAlerting` as the entry point

All inbound calls use the same entry point, allowing easy, common handling regardless of the channel. Use `AppEvents.CallAlerting` to answer the call and start your Voice AI logic.

For example:

```js title="Inbound Voice AI pattern"
VoxEngine.addEventListener(AppEvents.CallAlerting, async (event) => {
  const call = event.call;  // call object for the inbound session
  call.answer();            // stops ringing and connects media

    // Termination functions - add cleanup and logging as needed
    call.addEventListener(CallEvents.Disconnected, ()=>VoxEngine.terminate());
    call.addEventListener(CallEvents.Failed, ()=>VoxEngine.terminate());

  // Connect the Voice AI client
  const voiceAIClient = OpenAI.createRealtimeAPIClient({apiKey: "your-key", model: "your-realtime-model"});

  // Bridge media between the call and the Voice AI client so they can speak and hear each other
  VoxEngine.sendMediaBetween(call, voiceAIClient);
});
```

### Inbound guidelines:

* Answer quickly with `call.answer()`
* Listen for key call events (`Disconnected`, `Failed`, etc.) and handle as needed
* Create/configure the connector client
* Bridge media between call and connector:
  * Use `VoxEngine.sendMediaBetween(...)` for simple two-party bridging
  * Alternatively use `call.sendMediaTo(...)` and `connector.sendMediaTo(...)` for more complex pipelines
* Invoke methods and handle events from the connector to drive your Voice AI logic

#### <icon icon="fa-duotone fa-solid fa-link" /> More information:

* [Calls and Sessions concepts](https://voximplant.com/docs/getting-started/basic-concepts/calls-and-sessions)
* [Processing calls in scenarios guide](https://voximplant.com/docs/guides/calls/scenarios)
* [Launching a routing rule](https://voximplant.com/docs/getting-started/basic-concepts/routing-rules#launching-a-routing-rule)
* [VoxEngine Call class](https://voximplant.com/docs/references/voxengine/call)