The 3Com 3C503 EtherLink II/16 is a 16-bit ISA network adapter designed for legacy desktop systems and industrial PCs requiring Ethernet connectivity. This card operates at 16 kbit/s and connects via standard RJ-45 or coaxial interfaces typical of early 1990s networking. The ISA form factor integrates directly into legacy motherboards with ISA slots, supporting real-mode DOS drivers, Windows 3.x, and early Windows 95 environments. Primary use cases include retrofitting vintage business computers, embedded systems, and heritage equipment that must maintain original architecture. The 3C503 is compatible with 3Com-based network infrastructure and legacy network protocols including NetBEUI and IPX/SPX.
This refurbished unit has been tested and guaranteed to function. Available via quote from G5 Network Group.
