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

[Image]

                               DC CONVERTER

                 Setting                                JP1

  »       DC signal disabled (10BaseT            Pins 2 & 3 Closed
                  standard)

        DC signal enabled (non 10BaseT           Pins 1 & 2 Closed
                   network)

                              TRANSMIT LEVEL

                 Setting                                JP2

  »      Transmit level select normal            Pins 2 & 3 Closed
             (10Base-T standard)

        Transmit level select low (non           Pins 1 & 2 Closed
              10Base-T network)

                               RECEIVE LEVEL

                 Setting                                JP3

  »       Receive level select normal            Pins 1 & 2 Closed
             (10Base-T standard)

         Receive level select low (non           Pins 2 & 3 Closed
              10Base-T network)

                         TRANSCEIVER EQUALIZATION

                  Setting                         JP4            JP5

  »      Transmitter Equalization enabled        Closed          Open
               (10Base-T standard)

        Receiver Equalization enabled (non        Open          Closed
                10Base-T network)

                       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.