Hello! I know a different system that maybe can help you, it is called Optimas and belongs to Roycan, an enterprise specialized in language labs. It'a very good and useful technology for schools and universities and with it teachers can broadcast HQ video and audio in real time using only the LAN network! It's really amazing! Teachers can also work with groups and pairs, record dialogues, send and receive archives, launch and deany applications, etc. Check it, it can be very useful!