Direct: 8, Maximum: 256 (via Daisy-chain), Port Selection: OSD, Hotkey, Pushbutton, Console Ports: 1 x SPHD-18 Male (Yellow), KVM Ports: 8 x SPHD-15/17 Female (Yellow), Daisy Chain Ports: 1 x DB-25 Female (Black), 1 x DB-25 Male (Black). The CS1708A-AT-U KVM switch is a control unit that allows access to multiple computers from a single PS/2 or USB console (keyboard, mouse, and monitor). A single CS1708A-AT-U can control up to 8 computers.