RAD DATA COMMUNICATIONS

CMN-C8H/V.24, CMN-C8H/V.35, CMN-C8H/X.21, CMN-C8H/530

Card Type       Modem (synchronous/asynchronous)
Chipset         Unidentified
Data Rate       56Kbps/64Kbps
Data Modulation Unidentified
Data Bus        Serial

[Image]

                                CONNECTIONS

        Function            Label            Function             Label

  V.24, V.35, X.21, or       CN1      Unidentified                 CN3
  RS-530 serial port via
  DB-25 connector

  Telephone line out         CN2      Loopback test switch         SW6

            Note: Standard V.35 or X.21 connector is provided on an
            included adapter cable.

                        USER CONFIGURABLE SETTINGS

                     Setting                       Label      Position

  Line speed set to 64Kbps                         SW1/4         Off

  Line speed set to 56Kbps                         SW1/4         On

  Stop bit shortening for asynchronous mode set    SW1/5         Off
  to 25%

  Stop bit shortening for asynchronous mode set    SW1/5         On
  to 12.5%

  DCD forced high                                  SW2/2         On

  DCD follows RTS                                  SW2/2         Off

  Pin 18 of CN1 has no function                    SW2/3         Off

  Pin 18 of CN1 begins local analog loopback       SW2/3         On
  test

  Pin 21 of CN1 has no function                    SW2/4         Off

  Pin 21 of CN1 begins remote digital loopback     SW2/4         On
  test

                          CLOCK SOURCE SELECTION

         Setting              SW1/1           SW1/2            SW1/3

  Internal clock source        Off             Off              Off

  External clock source        On              Off              Off

  Received clock source        Off             Off               On

    Asynchronous mode          Off              On              Off

     DATA LENGTH SELECTION

  Setting    SW1/6      SW2/1

  8 bits      Off        Off

  9 bits      Off        On

  10 bits      On        Off

  11 bits      On        On

         SERIAL PORT CONFIGURATION

  Setting     SW3        SW4        SW5

    DCE        On         On        On

    DTE       Off        Off        Off

                          DIAGNOSTIC LED(S)

    LED        Color      Status               Condition

    PWR        Green        On                Power is on

    PWR        Green        Off               Power is off

    XMT       Yellow        On         Modem is transmitting data

    XMT       Yellow        Off      Modem is not transmitting data

    RCV       Yellow        On          Modem is receiving data

    RCV       Yellow        Off       Modem is not receiving data

    DCD       Yellow        On          Carrier signal detected

    DCD       Yellow        Off       Carrier signal not detected

    TST         Red         On           Modem is in test mode

    TST         Red         Off        Modem is not in test mode

                       MISCELLANEOUS TECHNICAL NOTE

  This card is intended for use in the CMN-16 rack-mount system. The bus
  is used only for supplying power for the card. All other card functions
  are accessed through the serial port.