The Tripp Lite 16-port KVM Console Switch is a convenient solution for controlling multiple computers (combination of PS/2, Sun, and USB). This single unit combines a 16-port KVM switch, keyboard, 15" LCD monitor and touchpad ? all in a mere 1U of rack space. The switch lets you control up to 512 PCs or servers by daisy-chaining additional 16-port 1U rackmount KVM switches. This hot pluggable switch features auto-sensing of station position on daisy chained installations ? no need for manual DIP switch setting. It has two-level password security feature that accommodates up to four users, plus an administrator, with separate profiles for each, ensuring that only authorized users can view and control connected PCs or servers. This convenient and easy-to-operate switch controls all ports using hotkeys or the mouse-driven OSD (On-Screen Display) menus. Its firmware upgrade port allows continual firmware upgrades.