Lexmark MarkNet X2030t Token Ring (4/16) - 3-ports. Network connection type: Ethernet LAN. Data transfer rate: 16 Mbit/s, Compatible operating systems: Windows 2000 Windows 98 SE Windows NT 4.0/4.0 Server Windows 95 Windows Me , I/O ports: 1x Ethernet RJ-45 1x DB-9 2x Centronics IEEE 1284 1x RS-232C D-Sub (25-pin)