3COM CORPORATION

EtherLink/MC TP 3C523B-TP (Assy.#6852)

NIC Type      Ethernet
Transfer Rate 10Mbps
Data Bus      16-bit MCA
Topology      Linear Bus

              Star
Wiring Type   Unshielded twisted pair

              DIX transceiver via DB-15 port
Boot ROM      Available

[Image]

                            DC CONVERTER ENABLE

                 Setting                                JP1

  »      DC signal disabled (10Base-T            Pins 1 & 2 Closed
                  standard)

        DC signal enabled (non 10Base-T          Pins 2 & 3 Closed
                   network)

                              TRANSMIT LEVEL

                 Setting                                JP2

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

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

                          TWISTED PAIR IMPEDANCE

   Impedance          JP3           JP4            JP5           JP6

     75ohm         Pins 1 & 2    Pins 1 & 2     Pins 1 & 2    Pins 1 & 2
                    closed         closed        closed         closed

     100ohm        Pins 2 & 3    Pins 2 & 3     Pins 2 & 3    Pins 2 & 3
                    closed         closed        closed         closed

     150ohm        Pins 3 & 4    Pins 3 & 4     Pins 3 & 4    Pins 3 & 4
                    closed         closed        closed         closed

                             LINK TEST ENABLE

               Setting                                 JP7

      Link test enabled (10Base-T               Pins 1 & 2 Closed
              standard)

   Link test disabled (non 10Baset-T            Pins 2 & 3 Closed
               network)

  Note:The link test is only valid when the cable type is twisted pair.

                               RECEIVE LEVEL

                 Setting                                JP8

  »       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                                JP9

  »     Transmitter Equalization enabled          Pins 1 & 2 Closed
              (10Base-T standard)

       Receiver Equalization enabled (non         Pins 2 & 3 Closed
               10Base-T network)

                            MISCELLANEOUS NOTES

  The interrupt request and cable type are set using the software that
  comes with the card.