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3Com 3C509B-TP-3 Etherlink III 32-Bit ISA 1 x Port 10Base-T Ethernet Network Interface Card
- 3Com EtherLink III series
- 1 x Port 10Base-T Ethernet
- 32-Bit ISA bus interface
- Plug-and-play configuration (via jumpers or software)
- Reliable legacy network connectivity
- Suitable for older PCs and servers
- Supports coaxial and twisted-pair (TP) connections (model dependent)
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Product Overview
The 3Com 3C509B-TP-3 is an EtherLink III network interface card, featuring a 10Base-T Ethernet port. It uses a 32-bit ISA bus interface, making it suitable for older computer systems.
Technical Information
| Brand | 3Com |
| Model | 3C509B-TP-3 |
| Series | Etherlink III |
Additional Specifications
| Port Type | 1 x 10Base-T RJ45 |
| Interface | 32-Bit ISA |
| Speed | 10 Mbps |
Product Description
The 3Com 3C509B-TP-3 is a classic 10 Mbps Ethernet network interface card (NIC) from the widely adopted EtherLink III series. This particular model is equipped with a single RJ45 port, designed for 10Base-T connections using standard twisted-pair Ethernet cabling. Its primary distinguishing feature is its interface: a 32-bit Industry Standard Architecture (ISA) bus, which was prevalent in PC and server motherboards during the 1990s and early 2000s. This card was known for its 'Plug and Play' capabilities, which, for its era, simplified installation by allowing the system to automatically configure IRQ and I/O addresses, often through software utilities or jumpers. The 3C509B-TP-3 provided reliable and cost-effective network connectivity for workstations and servers that relied on the ISA bus architecture. While 10 Mbps Ethernet and ISA bus interfaces are now considered legacy technology, this card remains relevant for maintaining or upgrading older computer systems, specialized industrial control systems, or in environments where backward compatibility with older network infrastructure is a requirement. It represents a foundational piece of networking hardware that enabled widespread adoption of local area networks.