The KH2516A KVM switch is a control unit that allows IT administrators to access and control multiple computers from two PS/2 or USB KVM consoles (one bus). Operators working at up to two consoles can independently and simultaneously take control of up to 16 computers. By daisy chaining up to 31 additional switches, as many as 512 computers can be controlled from the original KVM consoles. This switch has been designed with unique and powerful features that enable administrators to manage their entire server room and data center devices easily and conveniently.