3COM CORPORATION ETHERLINK III (3C509-COMBO) NIC Type Ethernet Boot ROM Available Network Transfer Rate 10Mbps Topology Linear Bus, Star Wire Type Unshielded twisted pair RG-58A/U 50ohm coaxial AUI transceiver via DB-15 port Data Bus 16-bit ISA [Image] CONNECTIONS Function Label Function Label AUI transceiver via DB-15 CN1 RG-58A/U 50ohm CN3 port connector UTP via RJ-45 connector CN2