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

# Introduction to WhatsApp Calling

> With the WhatsApp Calling API, your company extends communication on WhatsApp by offering voice calls (VoIP) directly to your customers.

# Introduction to WhatsApp Calling

**WhatsApp Calling** allows your company to extend communication on WhatsApp by offering voice calls (VoIP) directly to your customers. Use calls for quick confirmations, technical support, or finalizing interactions started via chat.

## When to use WhatsApp Calling

WhatsApp Calling is ideal for:

* **Quick confirmations:** verify information with the customer without waiting for text responses
* **Technical support:** diagnose issues more efficiently than through messages
* **Finalizing interactions:** complete support started via chat with a voice call
* **High-priority communication:** reach your customer immediately and directly

## How it works

When your company uses the WhatsApp Calling API:

* **Your company initiates the call:** you can start voice calls (VoIP) directly with customers through WhatsApp via the API.

* **The customer accepts or rejects:** the customer receives the call in their WhatsApp app and can accept or reject it.

* **Your company ends the call:** you can end an ongoing call at any time.

## Prerequisites

To use WhatsApp Calling, your number must meet the following requirements:

<Warning>
  **Calling enabled on the number:** the WhatsApp Calling feature must be enabled for your phone number. This is done via Positus Studio or with support from our team.
</Warning>

<Warning>
  **Calls webhook configured:** you must configure a webhook URL (`calls_webhook`) to receive call events. This is also done via Positus Studio or support — it is not available via public API.
</Warning>

<Info>
  Call events arrive in a **separate webhook** from the messaging webhook. Make sure both are configured correctly.
</Info>

## Next steps

Explore topics related to WhatsApp Calling:

* [Calling API](/en/positus/calling/api)
* [Calling Webhooks](/en/positus/calling/webhooks)
* [Samples](/en/positus/calling/samples)