Jitsi - Download, Setup and Dialling https://jitsi.org/ 1. Go to https://jitsi.org/ 2. Download the software, there may be a security warning.  Agree. 3.  Follow the instructions to install the software. 4.  Open the software, Jitsi from the Windows Start Menu 5.  You will see something like this: 6.  Go to Tools / Options 7.  Click "Add" 8.  Select "SIP" from the Network dropdown: 9.  Press "Advance". Add the SIP ID (this is the extension number followed by the IP Address @192.168.0.200) and the Password, you will be able to get this from Richard or Robert.  Now add your name that will be displayed when you make a call internally. 10.  Click "Next". 11. You will be asked to connect which will test your connection to the server. 12.  You are now able to make a call like this: 13.  Click the Phone Icon/Button 14.  Dial the number (9 for an outside line) and press the call button.