A signal switch for sharing a video monitor, a plurality of console devices compliant with an industry standard and one or more than one peripheral device in any of a plurality of computer systems, is provided. A KVM switch allows all the computers connected to the switch to share any USB peripheral devices, and which can switch the KVM channels and peripheral channels to a common computer or to different computers either asynchronously or synchronously without interruption of data flow to that peripheral when the switch is changed. In another embodiment the KVM switch allows a keyboard and a mouse of a user console to separately control two different computers. In another embodiment, the KVM switch is connected to the computers via computer connection modules and connected to a user console and peripheral devices via a console connection module.