HPE J9991A 20 Ports Expansion Module
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HPE J9991A 20-Ports PoE+ Ethernet 1000Base-T LAN Plug-In New

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Part Number#: J9991A
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Short Description:
J9991A 20-Port 10/100/1000base-T Power Over Ethernet Plus (POE+) Macsec V3 Zl2 Local Area Network (LAN) Expansion Module | Made by HPE | Brand New 3 Years Warranty
Brand Warranty:
3 Years Warranty
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days
Product Details about the HPE J9991A

In the dynamic landscape of networking solutions, the HPE J9991A 20-Ports PoE+ Ethernet 1000Base-T LAN Plug-In Module stands out as a powerhouse in facilitating connectivity and power distribution. This plug-in module, designed by Hewlett Packard Enterprise (HPE), brings forth 20 ports of Power over Ethernet Plus (PoE+) capability, coupled with Ethernet connectivity at 1000Base-T speed. In this in-depth exploration, we will delve into the intricacies of the HPE J9991A module, unraveling its features, benefits, and the impact it can have on network infrastructure.

PoE+ Overview

Power over Ethernet Plus (PoE+) is a technology that allows both data and electrical power to be transmitted over the same Ethernet cable. This eliminates the need for separate power cables, simplifying installations and providing flexibility in device placement. PoE+ extends the capabilities of traditional PoE by delivering higher power levels, making it suitable for a broader range of devices, including high-power devices like IP cameras and wireless access points.

1000Base-T Ethernet

1000Base-T is a standard for Gigabit Ethernet over copper wiring. It operates at a speed of 1000 megabits per second (Mbps), providing high-speed data transfer over twisted pair cables. This standard is prevalent in modern networking environments, offering a balance of speed and cost-effectiveness.

LAN Plug-In Module

A LAN Plug-In Module, such as the HPE J9991A, is a modular component designed to be inserted into compatible networking equipment. It expands the capabilities of the host device by providing additional ports and features. LAN modules are instrumental in scaling and customizing network infrastructure to meet specific requirements.

20 Ports for Enhanced Connectivity

The standout feature of the HPE J9991A module is its provision of 20 ports. These ports serve as connection points for various devices, allowing for the expansion of the network. This is particularly beneficial in environments where numerous devices need to be connected, such as in large office spaces or data centers.

PoE+ Capability for Power and Data

The inclusion of PoE+ capability in each port is a game-changer. This feature enables the module to not only transmit data but also deliver electrical power to connected devices. This is particularly valuable for devices like IP cameras, VoIP phones, and wireless access points, eliminating the need for separate power sources.

1000Base-T Speed for High-Performance Networking

Operating at 1000Base-T speed, the HPE J9991A module ensures high-performance networking. This Gigabit Ethernet capability facilitates the rapid transfer of data, reducing latency and enhancing the overall efficiency of the network. It is well-suited for environments where quick and reliable data transfer is crucial.

Plug-In Modularity for Flexibility

The plug-in modularity of the HPE J9991A module adds a layer of flexibility to network design. Administrators can customize their network infrastructure by inserting this module into compatible HPE networking equipment. This modular approach simplifies upgrades and modifications to meet evolving networking needs.

Intelligent Power Management

To optimize power distribution, the HPE J9991A module incorporates intelligent power management features. This ensures that power is allocated efficiently based on the requirements of connected devices. This not only enhances energy efficiency but also allows for the connection of a variety of PoE-enabled devices.

Office Environments

In large office environments, the HPE J9991A module proves invaluable for its ability to connect numerous devices seamlessly. From computers and printers to IP phones and security cameras, the 20 ports with PoE+ capability cater to diverse connectivity needs while simplifying cable management.

Surveillance Systems

For surveillance systems relying on IP cameras, the HPE J9991A module provides a centralized solution. With PoE+ capability, the module can power the cameras while ensuring high-speed data transfer. This simplifies installation and maintenance, making it an ideal choice for security applications.

Wireless Networks

Deploying wireless access points becomes more efficient with the HPE J9991A module. Its 20 ports and PoE+ capability allow for the seamless integration of access points throughout a space, providing consistent and reliable connectivity for mobile devices.

Data Centers

In data center environments where connectivity and power are critical, the HPE J9991A module addresses both needs. Its 20 ports can accommodate a variety of devices, and the PoE+ capability simplifies cable management, contributing to the overall efficiency of the data center.

Benefits of the HPE J9991A Module


The provision of 20 ports in the HPE J9991A module contributes to the scalability of network infrastructure. As business needs evolve and more devices need to be connected, the module allows for seamless expansion without the need for significant overhauls.

Simplified Cable Management

With PoE+ capability, the HPE J9991A module simplifies cable management significantly. Devices that would traditionally require separate power and data cables can now be powered through the Ethernet cable alone. This not only reduces cable clutter but also enhances the overall aesthetics of the networking environment.

Efficient Power Distribution

Intelligent power management features ensure efficient power distribution based on the needs of connected devices. This not only enhances energy efficiency but also prevents power wastage, contributing to a greener and more sustainable networking solution.

Flexibility in Network Design

The modular nature of the HPE J9991A module provides administrators with the flexibility to design and customize their network infrastructure. This adaptability is crucial in environments where networking needs may change over time, allowing for efficient upgrades and modifications.

General Information about the HPE J9991A
  • Manufacturer: HPE
  • Part Number or SKU# J9991A
  • Device Type: Expansion Module 20 Port
Technical Specifications
  • Device Type: Expansion Module
  • Form Factor: Plug-in Module
Networking 20 ports in the HPE J9991A module
  • Ports: Gigabit Ethernet (PoE+) x 20 + 1/2.5/5/10GBase-T (PoE+) x 4
  • Connectivity Technology: Wired
  • Cabling Type: Ethernet 10Base-T, Ethernet 100Base-TX, Ethernet 1000Base-T, Ethernet 10GBase-T, Ethernet 2.5GBase-T, Ethernet 5GBase-T
  • Data Link Protocol: 10Mb LAN, 100Mb LAN, GigE, 10 GigE, 5 Gigabit LAN, 2.5 Gigabit LAN
  • Data Transfer Rate: 10 Gbps
  • Features: PoE+, MACsec Support


  • Interfaces:20 x 1000Base-T (PoE+) - RJ-45
  • 4 x 1/2.5/5/10GBase-T (PoE+) - RJ-45

In summary, the HPE J9991A 20-Ports PoE+ Ethernet 1000Base-T LAN Plug-In Module stands as a versatile and powerful component in the realm of networking solutions. Its ability to provide both data connectivity and electrical power to devices through a single Ethernet cable simplifies installations and enhances the efficiency of network infrastructure. As organizations navigate the complexities of modern connectivity demands, the HPE J9991A module emerges as a reliable and flexible solution, contributing to the seamless operation of diverse networking environments.

Brand Warranty:
3 Years Warranty
Product Condition:
New Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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