ghldbrd wrote: Sounds like a DE-100. Should have BNC and an AUI connector on the back. Old, only does 10mbps, 16 bit ISA card, but not a cpu hog like some of the adapters were. Works great on older PC's (PC, XT, AT, 286, etc.). It is supported by Linux. Doesn't require a DEC PC, it should work on most brands with an ISA bus. To get a 10mb cat5 connection, you will need to buy a MAU, and move a big jumber on the card. I'd probably go with a $10.00 special at OfficeMax before going through that expense, and also get 100mbps for about the same price. I don't need any more (I still have several of these, and some DE-200's). Documentation for this is available on the intenet in several places.