The KVM Switch gets its name from the words “keyboard,” “video” and “mouse,” three devices that allow users to remotely access and control multiple servers from one or more KVM sites.
KVM switches can offer various ways to connect to the computers. In some instances, the KVM switch may present native connectors on the device where standard cables connect. Other situations call for a single DB25 or similar connector per port that connects to a special cable, which has the KVM switch connectors at the computer end. Using special cables can help to reduce the number of cables at the KVM switch.
To shift control from one computer to another, the user may use a switch or buttons on the KVM device. Signals are then passed between the computer and keyboard, and mouse and monitor depending on which computer is selected. Some electronic KVM switches allow switching via the keyboard or an on-screen display (OSD) menu.