# Set up your office line in MicroSIP or Linphone

Your administrator gave you a phone line. You got an email or SMS with three details: the **domain**, the **username** and the **password**. Keep them at hand.

1. **Install MicroSIP.** Download it free from [microsip.org/downloads](https://www.microsip.org/downloads) and install it on your Windows computer.

2. **Add your account.** Open MicroSIP. Click the small arrow **▾** at the top right and choose **Add Account**.

3. **Fill in your details.**

   | MicroSIP field | What to enter |
   |---|---|
   | **Account Name** | Anything, e.g. `Office` |
   | **SIP Server** | The domain |
   | **SIP Proxy** | Leave empty |
   | **Username** | The username |
   | **Domain** | The domain (same as SIP Server) |
   | **Login** | The username (same as Username) |
   | **Password** | The password |

4. **Save.** Click **Save**. In a few seconds the status at the bottom says **Online**. Call a coworker's extension to test.

That's it. Coworkers reach you on your extension, and calls to your line ring in MicroSIP.

## On a Mac: Linphone

MicroSIP runs only on Windows. On a Mac, use Linphone with the same three details.

1. **Install Linphone.** Download it free from [linphone.org/en/download](https://www.linphone.org/en/download/) and install it.

2. **Add your account.** Open Linphone and choose **Use a SIP account**.

3. **Fill in your details.** **Username** = the username, **Password** = the password, **Domain** = the domain. **Transport**: UDP.

4. **Log in.** In a few seconds the account shows as connected. Call a coworker's extension to test.

## Other phones and apps

Zoiper, Linphone, Grandstream and other SIP phones use the same three details: server / domain = the domain, username and auth ID = the username, password = the password. UDP or TCP on port 5060, TLS on 5061.

## Troubleshooting

**MicroSIP stays Offline or shows 401 / 403**

Check each field again. The most common mistakes are a different value in **Username** and **Login**, or a typo in the domain. If your administrator regenerated the password, the old one stops working: ask for the new one.

**Audio goes one way only: I can't hear them, or they can't hear me**

Turn on STUN in the phone's account or network settings and enter the server `stun.l.google.com:19302`. You only need this when audio goes one way; it is the usual fix when your phone is behind a router. Also allow MicroSIP through the Windows firewall when Windows asks. On a company network, ask IT to allow SIP (5060-5061) and audio (UDP) traffic.

**I lost the email**

Ask your administrator to send it again.

## For administrators

**Telephony - Active directory**, click the phone icon next to the person and switch **Device access** on. Under **Send the setup**, click **Email** or **SMS**. The person gets these steps with their details filled in. See [Users, seats and devices](https://docs.voicelogica.ai/telephony/users-and-devices/).