Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
3C503 - 3Com EtherLink II/16 ISA Ethernet Network Adapter
- ISA bus interface for compatibility with older motherboards.
- Supports 10BASE-T Ethernet connectivity.
- Features an RJ-45 connector for twisted-pair cabling.
- Designed for 16-bit data transfer.
- Plug-and-play configuration support for easier installation.
- Reliable performance for basic network access in legacy environments.
3C503 isn't on our shelf today — we source it to order. Request a quote and we'll confirm price and lead time within one business day.
Key specifications
See full specs ↓- Interface
- ISA
- Connector Type
- RJ-45
- Ethernet Standard
- 10BASE-T
- Data Bus Width
- 16-bit
Product details
The 3Com EtherLink II/16 ISA Ethernet Network Adapter is a legacy network interface card designed for older PC systems utilizing the ISA bus. It provides basic Ethernet connectivity for small to medium-sized networks.
Technical Information
| Interface | ISA |
| Connector Type | RJ-45 |
Additional Specifications
| Ethernet Standard | 10BASE-T |
| Data Bus Width | 16-bit |
Description
The 3Com EtherLink II/16 (3C503) represents an early generation of Ethernet network adapters, specifically engineered for integration into personal computers equipped with the Industry Standard Architecture (ISA) bus. This adapter was crucial for enabling communication between computers in local area networks (LANs) during the era when ISA was the dominant expansion slot technology. Its primary function was to translate data between the computer's internal bus and the Ethernet network, allowing for file sharing, printing, and other networked operations. This particular model offered 10 Mbps Ethernet connectivity, adhering to the 10BASE-T standard, which utilized unshielded twisted-pair (UTP) cabling with an RJ-45 connector. The 16-bit data bus interface ensured a reasonable throughput for the networking demands of the time. Installation and configuration were often managed through jumpers or software utilities, though later revisions aimed for improved plug-and-play capabilities to simplify the setup process for end-users. The 3C503 was a workhorse for many small businesses and home users seeking to establish basic network infrastructure. While superseded by newer technologies and bus architectures like PCI and USB, the 3C503 remains a notable component in the history of networking hardware. Its design prioritized robustness and compatibility within its intended technological ecosystem. For enthusiasts or those maintaining legacy systems, the 3C503 provides a functional solution for adding Ethernet capabilities to compatible ISA-based machines, enabling them to connect to older or specialized networks.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for 3C503.