An IP-PBX Windows based solution is a system designed to deliver voice or video over a data network and interoperate with the normal Public Switched Telephone Network.
Because of Windows functionality, an IP-PBX based on this platform is  relatively inexpensive and easy to add additional features, such as conferencing, control of live calls, Interactive voice response (IVR), Public switched telephone network (PSTN) interconnection ability supporting both analog and digital circuits, Voice over IP protocols including SIP, and others.