Microsoft NetMeeting is hidden component of Windows you need to initialize its setup to use it, to configure NetMeeting follow the steps given below.
Click Start Menu then Run
type conf in it and hit Enter this will initialize the NetMeeting configuration setup.
Follow all the instructions of that configuration setup
After completing the NetMeeting configuration wizard this will automatically run the NetMeeting application, if not double click the NetMeeting icon on desktop of type conf in Run Window. When you have opened the NetMeeting application click on Phone button and enter the IP address of the system that you want to communicate with
Feel free to ask any question about NetMeeting installation