# PortSIP

> Connect the PortSIP softphone on Windows, iPhone or Android to a SIP device on your PBX.

- URL: https://kb.voipcloud.online/au/phones-and-apps/softphones/portsip/
- Section: Phones and apps › Softphones
- Type: guide
- Applies to: All countries
- Last reviewed: 2026-11-09

PortSIP is a third-party softphone for Windows, iOS and Android. You connect it to a **SIP device** on your PBX.

## Before you start

1. Add a **SIP device** to the person's [User](https://kb.voipcloud.online/au/pbx/accept-make-divert/user/) under **Device configuration**, and click **Apply configuration**.
2. Open **Devices** at the top of the **PBX** tab and select the device. Keep its **SIP credentials** open: **Domain**, **Username** and **Password**.
3. Download PortSIP for your device from the PortSIP website or your app store.

The **Domain** shows the server address, a colon and the port. Use each SIP device in one app or phone only.

If **Transport protocol** shows **TLS**, [TLS encryption](https://kb.voipcloud.online/au/pbx/settings/general-settings/) is on for your PBX. The port in the **Domain** is then different, and you must set the app to use TLS instead of TCP, with SRTP (shown as **Media encryption**).

## 1. Enter your SIP details

**Note:** Menus can change between versions. If a label is different, check the vendor's own help.

On the PortSIP sign-in screen, fill in:

| PortSIP field | What to enter |
| --- | --- |
| **Username** | The **Username**. |
| **Password** | The **Password**. |
| **SIP Domain** | The **Domain**, including the colon and port. |

Don't sign in yet.

## 2. Set the advanced options

1. Tap **Advanced**.
2. Paste the **Domain** into **Outbound Proxy**.
3. Under the transport settings, choose **TCP**.
4. Optionally, set **Display as** to the name you want to see on your screen.
5. Go back and tap **Sign in**.

![PortSIP Android Advanced settings with Outbound Proxy and Auth Name blurred and TCP selected](https://kb.voipcloud.online/au/images/phones-and-apps/softphones/portsip-advanced-android.webp)

On iPhone, also turn on **Allow VoIP Calls** under **Mobile Data Network** in **Advanced**, so calls work without Wi-Fi.

## 3. Let PortSIP take calls in the background

Phones stop apps running in the background, which can make you miss calls.

**Android:** go to **Settings** › **Advanced** and turn on the notification options, such as **System Notification for Incoming Calls**, **Enable Notifications When App is in Foreground** and **Enable Vibration in Foreground**.

![PortSIP Android Advanced settings with the notification options highlighted](https://kb.voipcloud.online/au/images/phones-and-apps/softphones/portsip-notifications-android.webp)

**iPhone:** go to **Settings** › **Preferences** and turn on **Force Background**. This can use more battery.

![PortSIP iOS Preferences with Force Background turned on](https://kb.voipcloud.online/au/images/phones-and-apps/softphones/portsip-force-background-ios.webp)

## Check it works

1. In **PBX** › **Devices**, the SIP device shows **Online**.
2. Make a test call, then lock your phone and ask someone to call you.

If it stays offline, see [Softphone errors](https://kb.voipcloud.online/au/phones-and-apps/softphones/softphone-errors/). A device that tries to register with a wrong password is blocked, and the block lifts after 5 minutes.

## Related

- [Devices](https://kb.voipcloud.online/au/pbx/settings/devices/)