This is a KVM / console breakout cable, most commonly used with servers, network appliances, and KVM switches.

A DB-15 (HD15) to VGA + USB + Serial (RS-232) breakout cable.Connector breakdown (matching your photos)

1. Large black connector (one end)

• DB-15 / HD15 male

• This plugs into a server’s KVM / console port (common on Dell, HP, Supermicro, IBM, Cisco, etc.).

2. Blue connector

• VGA (DE-15 female)

• Carries video output to a monitor.

3. Black USB connector

• USB-A female

• Provides keyboard and mouse input to the server.

4. Small black 9-pin connector

• DB-9 (RS-232 serial)

• Used for serial console access (BIOS, BMC, switches, routers).

What it’s used for

This single cable gives you:

• Video (VGA)

• Keyboard/mouse (USB)

• Serial console (RS-232)

…from one proprietary KVM port on the device.

Typical use cases:

• Rack servers without dedicated rear VGA/USB

• Headless servers

• Network switches / firewalls

• Temporary crash-cart access in a data center

Common names you’ll see

• “Server KVM dongle”

• “DB15 KVM breakout cable”

• “VGA USB Serial console cable”

• “Crash cart adapter”

Brand compatibility (varies by pinout)

These are not universal. Pinouts differ by vendor.

Value (since you often resell hardware)

• Generic / unknown brand: $10–$20

• OEM-specific (Dell, IBM, Supermicro): $25–$60

• New OEM versions can exceed $80