D-Link DKVM-440 8-Port PS/2 & USB Combo KVM Switch – Daisy-Chained Cascade Control for Up to 512 PCs, On-Screen Display (OSD), Hot-Pluggable & 19" Rack-Mountable 1U Chassis

Device Type: 8-Port PS/2 & USB Combo KVM Switch (Stackable, Rackmount)
Model / SKU: D-Link DKVM-440 (also listed as KVM-440)
Ports: 8 direct PC ports (VGA + PS/2 or USB)
Cascade Capacity: Up to 512 PCs via 3-level daisy-chaining (stackable up to 64 units)
Console Interface: VGA Monitor + PS/2 Keyboard & Mouse
PC Interface: VGA + PS/2 or USB (via combo cables)
Max Resolution: Up to 2048 x 1536 @ 65Hz
Switching Methods: Front Panel Buttons, Keyboard Hotkeys (PS/2), OSD (On-Screen Display) Menu
Keyboard/Mouse Emulation: Yes (prevents boot errors on connected PCs)
Hot-Plugging: Supported
Rack Mounting: 19-inch 1U metal chassis (rack kit included)
Cables Included: 4x KVM combo cable sets (1.8m)
Power: No external power adapter required (bus-powered)
Key Specs: D-Link DKVM-440 8-Port KVM Switch, PS/2 & USB Combo, VGA Console, Up to 512 PCs via 3-Level Cascade, 2048x1536 Max Resolution, OSD/Hotkey/Button Switching, Hot-Pluggable, Keyboard Emulation, 19" Rackmount, 4 Cables Included
Usage: Server room and data center management, controlling multiple PCs/servers from a single console, small-to-medium server environments requiring rack-mounted centralized access .