Direct: 8, Maximum: 256 (via Daisy-chain), Console Ports: 2 x USB Type A Female, 1 x HDB-15 Female (Blue), KVM Ports: 8 x RJ-45 Female, Firmware Upgrade: 1 x RJ-11 Female (Black), Port Selection: 8 x Pushbutton, Scan Interval: 1–255 sec, Housing: Metal.. The KH1508A KVM switches are control units that allow IT administrators to access and control multiple computers from a single PS/2 or USB KVM console (keyboard, monitor, and mouse).