Aten Rackmount KVM Switch 2 Console 8 Port Multi-Interface Cat 5, KVM Cables NOT Included, Daisy Chainable for up to 128 Devices,The KH2508A 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 8 computers. By daisy chaining up to 15 additional switches, as many as 128 computers can be controlled from the original KVM consoles. This switch has been designed with unique and powerful features