These KVM switches are designed to give you control of multiple computers using just one keyboard, video display and mouse. They provide more table and rack space in addition to saving the cost of multiple keyboards, mice and monitors.  Between 24 to 32 Port

The main function of a KVM switch is to use only one set of keyboard, monitor and mouse to start multiple PCs. It is important that the KVM switch ensures the simulated keyboard and mouse signals reach each PC and that during switching there is no affect on the PCs CPU operations. A KVM switch must also provide stable video resolution, support multiple computer platforms and operating systems, and be able to interface with many different brands of keyboards and mice. Each KVM switch can only support a maximum number of PC connections, i.e. the total number of ports.