CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centers for scientific research. On any given day, 3000 CERN-related video connections may occur over Vidyo; some of the meetings are hosting hundreds of users in a single call joining from a variety of personal desktops, mobile devices and room systems. The infrastructure is also being used by more than 300 H.323 room systems either at CERN or in partner institutes. With peaks of up to 750 concurrent users, the traffic is spread over 20 servers worldwide that automatically cascade to enable network efficient mega conferences in one of the largest private Vidyo conferencing deployments in the world.