WESTERMO TELEINDUSTRI AB

MA-21DC

Card Type                     Modem (asynchronous)
Chip Set                      Unidentified
I/O Options                   DC power, RS-232-C, 20 mA current loop via
                              5-pin terminal block
Maximum Modem Rate            19.2Kbps
Data Modulation Protocol      C/CCITT V.24/V.28
Error Correction/Compression  Unidentified
Data Bus                      External

[Image]

                                CONNECTIONS

          Function             Label           Function            Label

  Power connector (terminal     CN1     RS-232-C port               CN3
  block)

  Terminal block                CN2

            USER CONFIGURABLE SETTINGS

           Function             Label    Position

  ? 115V AC enabled              S5         On

  230V AC enabled                S5        Off

         TRANSMITTED SIGNAL SELECTION

    Setting     S1/1     S1/2    S1/3    S1/4

  ?? TD pin 2    On      Off     Off     Off

  AUX pin 11     Off      On     Off     Off

  SRS pin 19     Off     Off      On     Off

  DTR pin 20     Off     Off     Off      On

                   CTS CONRTOL SELECTION

    Setting       S1/5     S1/6     S1/7     S1/8    S1/9

     ? RTS         On      Off       On       On     Off

       RD         Off       On      Off       On     Off

  Always High      On      Off      Off       On      On

                      TRANSMITTER/RECEIVER SELECTION

    Transmitter        Receiver      S2/1      S2/2      S2/3      S2/4
      Setting          Setting

     ? Normal          Normal         On       Off        On       Off

     Inverted          Normal        Off        On        On       Off

      Normal          Inverted        On       Off       Off        On

     Inverted         Inverted       Off        On       Off        On

              RECEIVER ACTIVE/PASSIVE SELECTION

   Setting     S3/1    S3/2    S3/3    S3/4    S3/5    S3/6

  ? Passive     On      On      Off     Off     Off     Off

   Active       Off     Off     On      On      On      On

            TRANSMITTER ACTIVE/PASSIVE SELECTION

   Setting     S4/1    S4/2    S4/3    S4/4    S4/5    S4/6

  ? Passive     On      On      Off     Off     Off     Off

   Active       Off     Off     On      On      On      On

                            *DIAGNOSTIC LED(S)

     LED          Color         Status                Condition

    LED1       Unidentified       On                 Power is on

    LED1       Unidentified       Off               Power is off

    LED2       Unidentified       On          Data is being transmitted

    LED2       Unidentified       Off       Data is not being transmitted

    LED3       Unidentified       On           Data is being received

    LED3       Unidentified       Off        Data is not being received