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  | 
| 
 CONNECTIONS  | |||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | 
| 
 Unshielded twisted pair  | 
 CN1  | 
 AUI transceiver via DB-15 port  | 
 CN2  | 
| 
 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 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | 
 Pins 1 & 2 closed  | |
| » | 
 100 ohms  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
 Pins 2 & 3 closed  | 
| 
 150 ohms  | 
 Pins 3 & 4 closed  | 
 Pins 3 & 4 closed  | 
 Pins 3 & 4 closed  | 
 Pins 3 & 4 closed  | |