Are you in the office? Then you can disconnect your device from the power supply or give it a factory reset. After a few minutes, everything will work as it used to. Is the phone not responding at all? Then you can sit down at another workstation and call from your extension by logging into that phone. It's that simple. If your phone is really broken, we will send you a new one. It works immediately so no installation problems. If necessary, we will plug it into your network for you, if that is what you want.