Network switch module HP Enterprise J9990A-RFB — Gigabit, 24 ports

HP Enterprise J9990A-RFB is a network switch module offering 24 Gigabit Ethernet ports in a compact, chassis-compatible form factor. Designed for integration into compatible HP Enterprise modular switches, this 24x1 Gbps module provides port-dense connectivity for edge aggregation, server uplinks, or access point distribution. The module is intended to expand existing switch capacity while maintaining consistent performance and straightforward cabling in enterprise environments.

Advantages

The HP Enterprise J9990A-RFB delivers 24 Gigabit ports in a single module, which reduces the need for multiple standalone switches and simplifies rack wiring. Its compatibility with HP Enterprise chassis systems enables centralized management and consistent firmware and feature sets across the network. The module supports standard 1 Gbps copper connections, allowing direct attachment of servers, workstations, and wireless access points without additional media converters.

Suitable for

• Edge aggregation for office or campus networks
• Server or storage uplinks in IDF/MDF racks
• Connecting multiple access points in wireless deployments
• Expanding port density in modular switch chassis

Key specifications

• Brand: HP Enterprise
• Model/MPN: J9990A-RFB
• Port count: 24 x 1 Gbps (Gigabit Ethernet)
• Interface type: Copper RJ-45 (1 Gbps)
• Form factor: Chassis/module compatible with HP Enterprise systems
• Use case: Enterprise network expansion and aggregation

How to use

Install the HP Enterprise J9990A-RFB module into a compatible HP Enterprise switch chassis following the chassis installation procedure and safety guidelines. After seating the module and securing any retention mechanisms, connect network devices using Cat5e or Cat6 cables to the RJ-45 ports. Configure network settings and VLANs through the chassis management interface or network controller to integrate the module into existing topology and routing/policy frameworks.

Usage recommendations

Use quality Ethernet cables (Cat5e or Cat6) for reliable 1 Gbps connections and place the module in a chassis with supported firmware levels to ensure feature compatibility. Monitor port status and performance via the chassis management tools and plan for adequate cooling and power capacity in the rack when adding port-dense modules.