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

# SIP Extensions

Before configuring SIP routing, you can create an extension manually.

<Info>
  Creating an extension is **optional**.\
  An extension can be **automatically generated** when configuring the SIP Integration.
</Info>

***

### Create Extension (Optional)

1. Go to **Phone Numbers**
2. Open the **Extensions** tab
3. Click **+** to create a new extension

<Frame>
  <img className="block" src="https://mintcdn.com/monobot-0e0ffe36/90B0L5Hnl7m86xGy/images/telephony/add_extension.png?fit=max&auto=format&n=90B0L5Hnl7m86xGy&q=85&s=9a3028ddd36a15e744e9590425b7c3b3" alt="SIP Extension" width="3007" height="1077" data-path="images/telephony/add_extension.png" />
</Frame>

### Configuration

Fill in the required fields:

* **Number** — internal extension (e.g., `222222`)
* **Description** — optional label (e.g., `Support`, `Sales`)
* **Enabled** — must be active

***

### Example

```
Number: 222222
Description: Support
Enabled: true
```

<Frame>
  <img className="block" src="https://mintcdn.com/monobot-0e0ffe36/90B0L5Hnl7m86xGy/images/telephony/config_new_extension.png?fit=max&auto=format&n=90B0L5Hnl7m86xGy&q=85&s=db7c43dadda53356f9e48ef1d1907a84" alt="SIP Extension" width="3028" height="1204" data-path="images/telephony/config_new_extension.png" />
</Frame>

### Usage

Extensions are used for:

* Call transfers via **Redirect Call**
* SIP routing (`sip:${extension}@...`)
* Connecting bot ↔ PBX ↔ agents

***

<Note>
  If you do not create an extension manually, the system will generate one automatically during SIP Integration setup.
</Note>