3COM CORPORATION ETHERLINK/MC TP (3C523-TP) NIC Type Ethernet Network Transfer Rate 10Mbps Data Bus MCA Topology Linear Bus/Star Wire Type Unshielded twisted pair AUI transceiver via DB-15 port Boot ROM Available [Image] CONNECTIONS Function Label Function Label Unshielded twisted pair CN1 AUI transceiver via DB-15 CN2 port USER CONFIGURABLE SETTINGS Setting Label Position » Transmit equalization J5 Pins 1 & 2 closed Receive equalization J5 Pins 2 & 3 closed » Receive threshhold normal J6 Pins 1 & 2 closed Receive threshhold low J6 Pins 2 & 3 closed » SQE heartbeat enabled J7 Pins 1 & 2 closed SQE heartbeat disabled J7 Pins 2 & 3 closed » Transmit level normal J8 Pins 1 & 2 closed Transmit level attenuated J8 Pins 2 & 3 closed » DC signal disabled J9 Pins 2 & 3 closed DC signal enabled J9 Pins 1 & 2 closed LINE IMPEDANCE Setting J1 J2 J3 J4 75 ohms Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed closed » 100 ohms Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 150 ohms Pins 3 & 4 Pins 3 & 4 Pins 3 & 4 Pins 3 & 4 closed closed closed closed