Alcatel-Lucent 90-5891-01/L Ethernet Hub

The Alcatel-Lucent 90-5891-01/L is a multi-port Ethernet hub designed for basic network connectivity in small office and workgroup environments. As a physical layer (Layer 1) networking device, this hub provides a simple and cost-effective solution for connecting multiple Ethernet devices within a local area network segment. The device features multiple 10BASE-T or 100BASE-TX RJ-45 ports that allow connection of desktop computers, printers, and other network-enabled equipment using standard twisted-pair cabling. The hub operates by broadcasting incoming data packets to all connected ports, enabling basic network communication between devices without intelligent switching or traffic management capabilities. Built with enterprise-grade reliability standards, the 90-5891-01/L includes LED status indicators for each port to display link status and network activity, facilitating basic troubleshooting and network monitoring. The device supports automatic MDI/MDIX crossover detection on ports, eliminating the need for crossover cables in most connection scenarios. With its compact rack-mountable or desktop form factor, the hub is suitable for installation in wiring closets, small office environments, or as a temporary network expansion solution. The unit operates on standard AC power and includes basic collision detection and handling mechanisms consistent with IEEE 802.3 Ethernet standards. While largely superseded by modern managed and unmanaged switches, this hub remains functional for legacy network installations, test environments, and applications where simple network extension is required without advanced features.