U.S. ROBOTICS, INC.

AUTO LINK 1200

Card Type                Modem (asynchronous)
Chip Set                 U.S. Robotics
Maximum Data Rate        1200bps
Data Bus                 External
Data Modulation Protocol Bell 212A

                                                                      V2254

                                CONNECTIONS

         Function           Label             Function             Label

  Line out                      CN1       Analog loopback switch    SW1

  Line in                       CN2       Originate mode switch     SW2

  RS-232/422                    CN3       Power switch              SW3

  DC power                      CN4

                        USER CONFIGURABLE SETTINGS

                      Setting                         Label      Position

  Auto answer disabled                                SW4/A        Off

  Auto answer enabled                                 SW4/A        On

  Local echo disabled                                 SW4/B        Off

  Local echo enabled                                  SW4/B        On

  Equalize for dial-up phone lines                    SW4/C        Off

  Equalize for dedicated phone lines                  SW4/C        On

  DTR normal                                          SW4/D        Off

  DTR forced high                                     SW4/D        On

                                  RS232C

        Setting           SW5/A        SW5/B        SW5/C        SW5/D

  Pin 2 receive/Pin 3       On          On           Off          Off
         send

    Pin 2 send/Pin 3       Off          Off          On           On
        receive

                             DIAGNOSTIC LED(S)

   LED      Color    Status                    Condition

    OH       Red       On                  Modem is off-hook

    OH       Red      Off                  Modem is on-hook

    CD       Red       On               Carrier signal detected

    CD       Red      Off             Carrier signal not detected

    ON       Red       On                     Power is on

    ON       Red      Off                    Power is off

    AL       Red       On        Modem is in analog loopback test mode

    AL       Red      Off      Modem is not in analog loopback test mode

    TR       Red       On                 DTR signal is high

    TR       Red      Off                  DTR signal is low

    SD       Red       On             Modem is transmitting data

    SD       Red      Off           Modem is not transmitting data

    RD       Red       On               Modem is receiving data

    RD       Red      Off             Modem is not receiving data

    AN       Red       On                 Auto-answer enabled

    AN       Red      Off                Auto-answer disabled

    RI       Red       On           Modem is receiving ring signal

    RI       Red      Off         Modem is not receiving ring signal

     MISCELLANEOUS TECHNICAL NOTES
           Note: Diagram not available.