To create this article, 19 people, some anonymous, worked to edit and improve it over time. This article has been viewe times. Learn more Instead of calling the phone company to request their services, try installing the new phone jack yourself. Any activity with the exposed wiring throughout this guide is an illegal practice in Australia unless you have an Australian Communication and Media wiring License. The filter installation and cords where you are plugging in or disconnecting the connection plugs RJ12 in the picture but RJ45s more common now are legal practices for anyone to do.