The KEEMUX®-P4-R 4-Port unit from NTI is a PS/2 KVM switch/
Rackmount which allows one keyboard, mouse & monitor to
control several PCs (up to 128 computers). The 4-Port device
features internal microprocessors which emulate keyboard and
mouse presence to each of the connected PC, so all computers
boot error-free. The Switch is compliant with IntelliMouse®
and it has RS232 and OSD control options.