Safe Checkout
Secure Payments
Fast Delivery
Order Today
Free Shipping
Across the US
Easy Returns
Hassle-Free
3Com 3C509-COMBO EtherLink III Combo Network Interface Card
- Combo network interface card.
- Supports 10 Mbps Ethernet (10Base-T and 10Base-2).
- Includes RJ-45 and BNC connectors for flexible connectivity.
- ISA bus interface.
- EtherLink III series for reliable performance.
- Manufactured by 3Com.
Click on Inquire to get latest price
Free U.S. Ground Shipping
Typically 1-2 handling + 3-7 transit days
Purchase orders accepted
For government, enterprise, data center, and small business customers.
Bulk Purchase Inquiry
Volume pricing and availability
Product Overview
The 3Com 3C509-COMBO is an EtherLink III Combo Network Interface Card. It provides flexible connectivity options, typically including both an RJ-45 Ethernet port and a BNC coaxial connector, supporting 10Base-T and 10Base-2 Ethernet standards. This card uses an ISA bus interface.
Technical Information
| Product Type | Network Interface Card |
| Interface | ISA |
| Ports | 1 x RJ-45, 1 x BNC |
Additional Specifications
| Speed | 10 Mbps (Ethernet) |
| Manufacturer | 3Com |
| Model Number | 3C509-COMBO |
Product Description
The 3Com 3C509-COMBO is a versatile Ethernet network interface card from the EtherLink III family, designed to provide 10 Mbps network connectivity. Its 'Combo' designation signifies its dual connectivity options: it features both an RJ-45 port for connecting to twisted-pair Ethernet networks (10Base-T) and a BNC connector for coaxial cable networks (10Base-2). This flexibility made it a popular choice in environments where different network cabling standards were in use. This card utilizes the older ISA (Industry Standard Architecture) bus interface, which was common in PCs during the late 1980s and early to mid-1990s. While slower than modern interfaces like PCI or PCIe, the ISA bus was sufficient for 10 Mbps Ethernet speeds. The EtherLink III series was known for its reliability and Plug and Play capabilities (though driver support varied by operating system). The 3C509-COMBO was widely deployed in business and educational institutions during its era, offering a cost-effective and adaptable solution for network integration. Its ability to connect to both common types of Ethernet cabling provided significant installation flexibility, making it a staple for many network administrators setting up or expanding their local area networks.