# Extensions

The following guide will explain the steps necessary to configure extensions of the FreePBX.

## Configuring an extension in FreePBX

**Step 1.** Navigate to **Extensions**, located under the **Applications** section at the top menu.

**Step 2.** On the Extensions page, click **Add Extension** and select **Add new SIP (chan\_pjsip) Extension** from the
dropdown menu (Fig. 1).

[![../../_images/extensions_fig1.jpg](../../_images/extensions_fig1.jpg)](../../_images/extensions_fig1.jpg)


**Fig. 1.** Extensions page.

**Step 3.** In Add PJSIP Extension window, fill out these fields (Fig 2.):

> - **User Extension:** your preferred number for Internal number and SIP account username (e.g. 1234)
> - **Display Name:** your preferred name
> - **Outbound CID:** caller ID for making outbound calls
> - **Secret:** generated or your chosen password to register extension

[![../../_images/extensions_fig2.jpg](../../_images/extensions_fig2.jpg)](../../_images/extensions_fig2.jpg)


**Fig. 2** Add PJSIP Extension page.

**Step 4.** Complete configuration by clicking the **Submit** button on the bottom right side. Click on **Apply Config**
located on the top right side.

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