# Calling from Another Device

### Calling from Another Device Using the PortSIP ONE App

The PortSIP ONE desktop app lets you manage contacts and initiate calls while using **another device,** such as your **mobile phone** or **desk phone,** to place and receive the actual call.

For example, if you prefer to make calls on your desk phone, you can route all outgoing calls from the PortSIP ONE app to that device with just a few clicks, allowing you to work in the way that suits you best.

***

### Enable Calling from Another Device

#### To enable and use another device for outbound calls:

1. Click the **Settings** icon in the left-hand menu.
2. Select **Application**.
3. Enable **Calling from another device**.
4. Click **Apply** to save your changes.

<figure><img src="https://846155343-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MfkamWLaD5pcQwlKWwC%2Fuploads%2FoDel7ElBhRBaKaPbxJB7%2Fportsip-one-calling-device-1.png?alt=media&#x26;token=9d3ca854-3094-4834-a346-4cbb9fccc5b7" alt=""><figcaption></figcaption></figure>

***

### Connect to a Device

1. Click the **Connect to a device** icon in the PortSIP ONE title bar.
2. A list of currently available devices will be displayed.
3. Select the device you want to use for outbound calls. A confirmation message appears, indicating that all outbound calls will now be initiated from the selected device.

<figure><img src="https://846155343-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MfkamWLaD5pcQwlKWwC%2Fuploads%2F5zJBi6XA0y4CnXGSMkd1%2Fportsip-one-calling-device.png?alt=media&#x26;token=bf206d22-b8aa-4bdb-9da5-2a6e5dcec781" alt=""><figcaption></figcaption></figure>

***

### Expected Behavior

* After a device is selected, **all outgoing calls initiated from the PortSIP ONE app** will be placed using that device.
* If the selected device becomes unavailable or goes offline, an error message will appear when you attempt to place a call.
* To switch devices, click the **Connect to a device** icon again and select a different device.
* To stop using another device, **deselect** the currently connected device.