3COM ETHERLINK III 3C509B-TPO NIC Type Ethernet Network Transfer Rate 10Mbps Data Bus 16-bit ISA Topology Star Wiring Type Unshielded twisted pair Boot ROM Available (location unidentifed) [Image] CONNECTIONS Function Label Unshielded twisted pair port CN1 DIAGNOSTIC LED(S) LED Status Condition LED1 On Network connection is good LED1 Blinking Cable Polarity is reversed LED1 Off Network connection is broken Note: When you first install the adapter and power up the computer, the LED lights, but the network connection is not active. For the network connection to be good you need to run the Group 3 test or have loaded the network drivers.