The video blade is responsible for all video processing for conferences. It provides 24 fully transrated and transcoded SD video ports for switching and continuous presence with bandwidth from 128 Kbps to 2 Mbps, or 48 ports for desktop video with 128 to 384 Kbps bandwidth for a single video blade. Multiple video blades reduce capacity to 20 high-rate or 40 desktop-rate video ports per blade.