Black Box SR-3020-Q Rackmount KVM Switch Box 5-Port DB9 PS/2 Serial

Black Box SR-3020-Q Rackmount KVM Switch Box 5-Port DB9 PS/2 Serial

The Black Box SR-3020-Q is a rackmount switch box that allows a single keyboard, video monitor, and mouse (KVM) console to be shared across multiple computers or serial devices. It mounts in a standard equipment rack and provides front-panel port selection via rotary knobs and push-button controls, making it straightforward to switch between connected systems without rerouting cables.

Specifications & What's Included

• Manufacturer: Black Box Corporation
• Model: SR-3020-Q
• Serial No.: (see internal records)
• Country of Manufacture: U.S.A. (per label)
• Form Factor: Rackmount (standard 19" rack ears visible)
• Number of switchable ports: 5 (P1–P5)
• Common (console) port: 1 (labeled COMMON on rear)
• Rear connectors: Multiple DB9 (9-pin serial), PS/2 Mini-DIN 6-pin, DIN, and DB15 connectors across P1–P5 and Common positions
• Front panel controls: Rotary selector knobs, SW1/SW2 toggle switches, red push-button keyboard lock
• Port labels on front: P1, P2, P3, P4, P5, SW1, SW2, COMMON
• Known defect: One of three front-panel selector knobs is broken off; threaded post remains
• Switch box only — no cables included

Applications

Rackmount KVM and serial switch boxes like the Black Box SR-3020-Q were widely used in data centers, server rooms, and equipment racks from the 1990s through the 2000s, allowing IT staff to manage multiple servers or workstations from a single keyboard, monitor, and mouse console. The combination of DB9 serial, PS/2, and DIN connectors reflects the mixed-interface environment of that era, where different computers used different keyboard and mouse standards. These units remain useful today for managing legacy servers, industrial PCs, or any rackmounted equipment that still uses PS/2 or serial console connections. Black Box Corporation was a well-known U.S. supplier of connectivity and KVM solutions, and their switch boxes were common fixtures in professional server and telecom rack installations.