> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-weise-ich-eine-durchwahl-zu.md).

# How do I assign an extension?

{% tabs %}
{% tab title="sipgate classic" %}
With an extension, all users in your account can reach each other without having to dial the full phone number of the respective user. You also need extensions for your users if you want to use presence display. For snom phones, you also need the extension to[ configure the busy lamp field.](https://help.sipgate.de/hc/de/articles/4403611171473/live_preview/01K6FVTRNS1EMQ5JJTDSBERDYM)

You can assign extensions if you are logged in as **admin** logged in. Users can have multiple internal extensions, but only one extension per routing.

**This is how you assign an extension to a user:**

First, open the **account management** and click the tile at the top left **User.** Now select the desired **user** items. Then click on **Edit** and then on **Add extension.** Then add the desired extension.

{% hint style="info" %}
Important: For **mobile phones** internal extensions should always be **three or four digits** long.
{% endhint %}

Click on **Save** and then in the overview on **Finish editing.**

**Assign extensions to groups**

To assign a phone number or an internal extension to a group, go to [group overview](https://app.sipgate.com/groups) and select the desired group. You can add the desired extension via Edit routing in Visual Routing.

**Account management → Groups → Select group → Edit routing → Phone number** and **Add extension**
{% endtab %}

{% tab title="sipgate neo" %}
Extensions for individual connections can only be assigned by **Admins** of the account. As an admin, go to the tile in account management **user** and click the user for whom you want to assign an extension. In the user's personal routing, you will see the assigned phone number at the top and the button for assigning an extension to the right of it. Click the Extension button and enter the desired extension there. Please make sure that you assign each extension only once. With a click on **Save** the extension is assigned to the corresponding user.

Extensions can also be assigned to **shared channels** be assigned. To do this, go to the menu item **Channels** and select the desired channel. The extension is then assigned in the same way as for the personal channels of individual users.
{% endtab %}
{% endtabs %}

<details>

<summary><strong>The following number sequences cannot be assigned for technical reasons:</strong></summary>

* 110 (police emergency number, Germany)
* 111 (emergency number, New Zealand)
* 112 (fire and rescue service emergency number, Germany)
* 113
* 114
* 115 (government information number, Germany)
* 116
* 117
* 118
* 119
* 211
* 311
* 411
* 511 (USA hotline number)
* 611
* 711 (USA long-distance call assistance)
* 811
* 911 (emergency number, USA)
* 999 (emergency number, UK)
* 9900-9999

</details>

All users of the account can reach each other via the extension. Please note that extensions must be dialed from a mobile phone followed by \*. So if, for example, you want to reach extension 10 from a mobile phone, dial 10\* to call the extension.


---

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