Abstract: The voice control system includes a KVM switch and an audio device. The audio device receives a voice command, transforms the voice command into a command signal and outputs the command signal to the KVM switch for controlling the KVM to manage computers. A method for managing the computers by a voice command is also disclosed.

Abstract: A control system for controlling target computers through a portable computer is disclosed. The control system includes a first USB device controller, a second USB device controller, and a third USB device controller. The first USB device controller transmits a first input signal and receives video data. The second USB device controller transmits a second input signal and receives video data. The third USB device controller transmits the video signal coming from the first or the second target computers to the portable computer and receives the first or the second input signals from the portable computer. The portable computer controls the first target computer by the first input signal and controls the second target computer by the second input signal.

Abstract: A KVM switch is provided for a set of user interface devices to share a plurality of computers. The KVM switch comprises a network port, a second interface, at least one first interface, a switch device and an Ethernet hub. The network port is arranged to connect to a network. The second interface is arranged to connect the set of user interface devices. The first interface is arranged to connect the computers, and the first interface has a port for connecting a network interface of the computers. The switch device is arranged to route paths between the second interface and the first interface. The Ethernet hub is arranged to connect the network port and the port of the first interface.