HP 28640-60001 802.3 LAN Adapter NIC Card 10Mbps AUI ThinLAN Ethernet

HP 28640-60001 802.3 LAN Adapter NIC Card 10Mbps AUI ThinLAN Ethernet

The HP 28640-60001 is a proprietary 10 Mbps IEEE 802.3 Ethernet LAN adapter card designed for HP workstations and server systems. It provides network connectivity via dual interfaces — an AUI (DB-15) port and a ThinLAN (BNC/10BASE2) port — allowing connection to either an external transceiver or directly to a coaxial thin Ethernet segment. The front bracket is clearly labeled "802.3 LAN 10 Mbps" with FLASH and ON indicator LEDs for link and self-test status.

Specifications & What's Included

• Part Number: 28640-60001
• Standard: IEEE 802.3 Ethernet
• Data Rate: 10 Mbps
• Interface 1: AUI (DB-15) — for external transceiver
• Interface 2: ThinLAN (BNC / 10BASE2) — for thin coaxial Ethernet
• Front panel LEDs: FLASH (Xcvr/Net Fail) and ON (Self-test Fail)
• Note on bracket: "Qualified Service Rep: EXT/INT Jumper Activates AUI or ThinLAN Port"
• Form Factor: Proprietary card/module (HP system-specific edge connector)
• PCB: Green, populated with multiple ICs, two heatsinks, and onboard logic
• Card only — no cables or accessories included

Applications

The HP 28640-60001 was designed for HP workstations and computing platforms of the late 1980s to mid-1990s — the era when IEEE 802.3 10BASE2 (ThinNet) coaxial Ethernet and AUI-based transceivers were the dominant network connection standards before twisted-pair 10BASE-T took over. Cards of this type provided HP workstations with access to corporate LANs, file servers, and networked peripherals in environments that ran thin coaxial bus topologies. Today these cards are primarily sought by technicians and collectors maintaining legacy HP workstation systems, restoring period-correct machines, or keeping older HP hardware operational in specialized environments. The dual AUI/ThinLAN bracket gives flexibility in connecting to either a coaxial segment directly or via an external 10BASE-T or 10BASE5 transceiver.