3COM CORPORATION
ETHERLINK II TP (3C503; ASSY.#6330)
| 
 NIC Type  | 
 Ethernet  | 
| 
 Transfer Rate  | 
 10Mbps  | 
| 
 Data Bus  | 
 8-bit ISA  | 
| 
 Topology  | 
 Star  | 
| 
 Wiring Type  | 
 Unshielded twisted pair DIX transceiver via DB-15 port  | 
| 
 Boot ROM  | 
 Available  | 
| 
 DC CONVERTER  | ||
| 
 Setting  | 
 JP1  | |
| » | 
 DC signal disabled (10BaseT standard)  | 
 Pins 2 & 3 Closed  | 
| 
 DC signal enabled (non 10BaseT network)  | 
 Pins 1 & 2 Closed  | |
| 
 TRANSMIT LEVEL  | ||
| 
 Setting  | 
 JP2  | |
| » | 
 Transmit level select normal (10Base-T standard)  | 
 Pins 2 & 3 Closed  | 
| 
 Transmit level select low (non 10Base-T network)  | 
 Pins 1 & 2 Closed  | |
| 
 RECEIVE LEVEL  | ||
| 
 Setting  | 
 JP3  | |
| » | 
 Receive level select normal (10Base-T standard)  | 
 Pins 1 & 2 Closed  | 
| 
 Receive level select low (non 10Base-T network)  | 
 Pins 2 & 3 Closed  | |
| 
 TRANSCEIVER EQUALIZATION  | |||
| 
 Setting  | 
 JP4  | 
 JP5  | |
| » | 
 Transmitter Equalization enabled (10Base-T standard)  | 
 Closed  | 
 Open  | 
| 
 Receiver Equalization enabled (non 10Base-T network)  | 
 Open  | 
 Closed  | |
| 
 TWISTED PAIR IMPEDANCE  | ||||
| 
 Impedance  | 
 JP6  | 
 JP7  | 
 JP8  | 
 JP9  | 
| 
 75ohm  | 
 Pins 1 & 2  | 
 Pins 1 & 2  | 
 Pins 1 & 2  | 
 Pins 1 & 2  | 
| 
 100ohm  | 
 Pins 2 & 3  | 
 Pins 2 & 3  | 
 Pins 2 & 3  | 
 Pins 2 & 3  | 
| 
 150ohm  | 
 Pins 3 & 4  | 
 Pins 3 & 4  | 
 Pins 3 & 4  | 
 Pins 3 & 4  | 
| 
 BOOT ROM ADDRESS  | |||||
| 
 Address  | 
 JP10  | 
 JP11  | 
 JP12  | 
 JP13  | 
 JP14  | 
| 
 Disabled  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 C8000h  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 CC000h  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
| 
 D8000h  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 DC000h  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 I/O BASE ADDRESS  | ||||||||
| 
 Address  | 
 JP15  | 
 JP16  | 
 JP17  | 
 JP18  | 
 JP19  | 
 JP20  | 
 JP21  | 
 JP22  | 
| 
 250h  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
| 
 280h  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 2A0h  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
| 
 2E0h  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 300h  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 310h  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 330h  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 350h  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 LINK INTEGRITY TEST  | ||
| 
 Setting  | 
 JP23  | |
| » | 
 Enabled  | 
 Pins 2 & 3 Closed  | 
| 
 Disabled  | 
 Pins 1 & 2 Closed  | |
| 
 Note:Link Integrity is only used with 10Base-T wiring. When using an AUI transciever, the test should be disabled.  | ||
| 
 DIAGNOSTIC LED(S)  | ||
| 
 LED  | 
 Status  | 
 Condition  | 
| 
 L1  | 
 On  | 
 Data is being transmitted or received  | 
| 
 L1  | 
 Off  | 
 Data is not being transmitted or received  | 
| 
 L2  | 
 On  | 
 Twisted pair network connection is good  | 
| 
 L2  | 
 Off  | 
 Twisted pair network connection is broken  | 
| 
 MISCELLANEOUS NOTES  | 
| 
 The interrupt request and cable type are set using the software that comes with the card.  |