HP

HP 262588-B21 - 2 KVM CAT5 PS/2 Interface Adapter

Connect PS/2 servers to your KVM switch over standard CAT5 cabling with this HP interface adapter.

$29.99*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The HP 262588-B21 KVM CAT5 PS/2 Interface Adapter is a server-side dongle that allows administrators to connect PS/2-equipped servers to an HP KVM (Keyboard, Video, Mouse) switch using standard CAT5 network cabling. Instead of running dedicated multi-conductor KVM cables from each server to the switch — cables that are expensive, bulky, and difficult to route in dense racks — this adapter converts the server's PS/2 keyboard and mouse signals into a format that travels over an ordinary RJ-45 Ethernet patch cable to the KVM switch.

This adapter is purpose-built for HP's KVM switch ecosystem and plugs directly into the PS/2 ports on the rear of a server. Once connected, a single CAT5 cable runs from the adapter to the corresponding port on the HP KVM console switch, giving the administrator keyboard and mouse control of that server from a centralized management station. For data centers and server rooms still running legacy hardware with PS/2 interfaces, this adapter keeps infrastructure tidy and manageable without requiring a full KVM cabling overhaul. It is worth noting that this is a PS/2-only device — environments transitioning to USB-based servers will need the corresponding USB interface adapter instead.

Specifications

Brand
HP
Model
262588-B21 (396632-001)
Type
KVM CAT5 Interface Adapter
Interface
PS/2 (Keyboard and Mouse)
Network Cable
Standard CAT5 / CAT5e (RJ-45)
Compatibility
HP KVM Switches

Pros & Cons

👍 Pros

  • Replaces bulky dedicated KVM cables with inexpensive standard CAT5 Ethernet cabling
  • Compact dongle form factor takes up minimal space in crowded server racks
  • Simplifies server management by enabling remote keyboard and mouse access through the KVM switch
  • HP-branded quality designed to integrate directly with HP KVM infrastructure

👎 Cons

  • PS/2 interface only — not usable with servers that have exclusively USB ports
  • Designed specifically for HP KVM switches, limiting use with other vendors' equipment
  • Does not carry video — a separate video connection or a video-capable KVM module is still required
  • Legacy product that may be difficult to find replacement units for as PS/2 servers age out

Frequently Asked Questions

It converts a server's PS/2 keyboard and mouse ports into a single RJ-45 connection, allowing you to manage that server through an HP KVM switch using standard CAT5 cabling instead of bulky dedicated KVM cables.
This adapter is designed for use with HP KVM switches that support CAT5 interface modules. Compatibility with third-party KVM switches is not guaranteed.
This is a PS/2-only interface adapter. Servers that exclusively use USB ports for keyboard and mouse will require a USB variant instead.
Yes, you connect the adapter to your HP KVM switch using a standard CAT5 or CAT5e Ethernet patch cable, which simplifies cabling in dense rack environments.