My school was given a 220 Express by a local company years ago and has not been used since. I wanted to try to use this to stream a presentation from our auditorium to a specific classroom. I have been trying to figure it out but have't been able to make or receive a call on my LAN. Am I missing a component? All I have is the camera. If I need to subscribe to a service then this unit is of no use to us for we do not utilize videoconferencing. We are a public school and budget is always a big concern.