3Com EtherLink III Combo 16-Bit Ethernet Network Adapter
Brand: 3Com · SKU: 3C509B-COMBO · MPN: 3C509B-COMBO · Category: Components
The 3Com 3C509B-Combo is a legacy Ethernet Network Interface Card (NIC) that uses the ISA bus, designed for 10 Mbps Ethernet connectivity. As a 'Combo' card, it provides flexible cabling options supporting 10BASE-T (RJ-45), 10BASE-2 (Thin Coaxial/BNC), and 10BASE-5 (Thick Coaxial/AUI) connections. It is the second generation of the EtherLink III family, featuring Parallel Tasking technology for faster data throughput. This card is typically used in older desktop PCs or systems with legacy ISA expansion slots to maintain network access.
Specifications
| Form Factor | Plug-in Card |
|---|---|
| RJ-45 Ports | 1 |
| Total Ports | 3 |
| Product Line | EtherLink III |
| Bus Data Path | 16-bit |
| Host Interface | ISA (16-bit, compatible with some 8-bit systems) |
| Chipset/Controller | 3Com 3C509 |
| Data Link Protocol | Ethernet (IEEE 802.3) |
| Data Transfer Rate | 10 Mbps |
| Network Technology | 10BASE-T, 10BASE-2, 10BASE-5 |
| Standards Compliance | IEEE 802.3 |
| Warranty | Standard warranty service for hardware products may be obtained by delivering the defective product, accompanied by a copy of the dated proof of purchase, to the 3Com Corporate Service Center (Specific warranty terms may vary based on seller/condition, e.g., Refurbished). |
| Weight | 5 |
| Dimensions | 6.1 in (Depth) x 3.9 in (Height) x 0.8 in (Width) |
Key Features
The 3Com 3C509B-COMBO is an EtherLink III ISA Network Interface Card offering 10 Mbps Ethernet connectivity. Its 'Combo' designation means it includes connections for Twisted Pair (10BASE-T via RJ-45), Thin Coaxial (10BASE-2 via BNC), and Thick Coaxial (10BASE-5 via AUI connector). It features 3Com's Parallel Tasking technology for performance enhancement on legacy ISA bus systems.
Frequently Asked Questions
Is this product genuine OEM?
Yes, this 3Com EtherLink III Combo 16-Bit Ethernet Network Adapter (3C509B-COMBO) is 100% genuine 3Com hardware. All our products are verified by certified technicians and come with clean serial numbers ready for service contract registration.
What warranty is included?
This 3Com EtherLink III Combo 16-Bit Ethernet Network Adapter includes our standard 3-Year Warranty covering all manufacturing defects. We also offer advanced replacement options for minimal downtime.
How long does shipping take?
We offer free ground shipping which typically takes 3-5 business days. Expedited shipping options are available at checkout for faster delivery.
Can I return this product?
Yes, we have a 30-day return policy on all products. Restocking fees may apply for opened items. Please see our return policy for complete details.
Is the 3Com EtherLink III Combo 16-Bit Ethernet Network Adapter compatible with my system?
Please check the specifications tab for detailed compatibility information. Our technical team is available to assist with compatibility questions for the 3C509B-COMBO.
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