Token-ring adapter, runs at 4 or 16 Mbps with RJ-45 and DB9 connector. Compatible with Novell, IBM, Microsoft, and UNIX network operating systems, full compliance with IEEE 802.2, 802.5 and 802.5r, auto-sensing integrated support for shielded twisted pair (STP) and unshielded twisted pair (UTP) with on-board media filter, software-selectable 16 Mbps or 4 Mbps network speed, operation in PCI master or slave slots using bus master DMA mode or I/O mapped mode.