Linksys EFAH05W EtherFast 10/100 Auto-Sensing 5-Port Workgroup Hub w/ AC Adapter

Linksys EFAH05W EtherFast 10/100 Auto-Sensing 5-Port Workgroup Hub w/ AC Adapter

The Linksys EFAH05W is a compact, desktop Ethernet workgroup hub offering five auto-sensing 10/100 Mbps RJ-45 ports plus a dedicated uplink port. It automatically detects each connected device's speed — 10 Mbps or 100 Mbps — and adjusts accordingly, making it plug-and-play compatible with a mixed network of legacy and Fast Ethernet devices. This unit includes its original AC adapter.

Specifications & What's Included

• Model: Linksys EFAH05W
• Type: EtherFast 10/100 Auto-Sensing 5-Port Workgroup Hub
• Ports: 5 × RJ-45 auto-sensing 10/100 Mbps + 1 Uplink RJ-45 port
• Port speed: 10 Mbps or 100 Mbps, auto-detected per port
• Network standards: Ethernet (IEEE 802.3), Fast Ethernet (IEEE 802.3u)
• LED indicators: Pwr, 100, 10, Col (collision), per-port Lk/Act, 100, and SW (uplink)
• Form factor: Desktop
• Power: 3.3V DC, 3.0A
• Included AC adapter: Model AW10-3R3-u, P/N PS10-0303-AM
• AC adapter input: 100–120V AC, 50–60 Hz, 0.5A
• AC adapter output: +3.3V DC, 3.0A
• AC adapter markings: UL listed, CE marked, Made in Taiwan R.O.C.

Applications

The EFAH05W was designed for small office, home office (SOHO), and workgroup environments in the late 1990s and early 2000s — the era when Fast Ethernet (100BASE-TX) was displacing the older 10BASE-T standard on desktop networks. As an unmanaged hub, it shares available bandwidth across all connected ports, making it straightforward to deploy without any configuration. It is commonly used today to extend a small wired network, connect a cluster of legacy machines that lack a switch, or serve as a simple dedicated segment for older equipment such as retro computers, serial-era workstations, or legacy industrial devices that communicate over 10 Mbps Ethernet. The uplink port allows the hub to be cascaded from a switch or router without a crossover cable. Units like this are still sought for vintage computing setups and small isolated network segments where a basic, reliable hub is all that is needed.