Reference:
CL5716N-ATA-XG
The CL5716 Slideaway™ LCD KVM Switch is a control unit that allows access to multiple computers from a single PS/2 or USB KVM (keyboard, video, and mouse) console. A single CL5716 can control up to 16 computers. As many as 31 additional KVM switches can be daisy-chained to the CL5716, so that up to 512 computers can all be controlled from a single KVM console.