WESTERMO TELEINDUSTRI AB

MD-21

Card Type                    Modem
Chip Set                     Unidentified
I/O Options                  9-pin serial port (RS-232), terminal blocks
                             (3)
Maximum Modem Rate           19.2Kbps
Data Modulation Protocol     ITU-T V.24/V.28
Error Correction/Compression Unidentified
Data Bus                     External

[Image]

                                CONNECTIONS

          Function            Label            Function            Label

  DCE serial port (terminal    CN1     Network interface            CN3
  block)                               (terminal block)

  Power connector (terminal    CN2     9-pin serial port            CN4
  block)

                  INVERTED TRANSMITTER/RECEIVER SELECTION

                   Setting                        S1/1           S1/2

  »      Transmitter and receiver normal           Off           Off

       Transmitter inverted, receiver normal       On            Off

       Transmitter normal, receiver inverted       Off            On

        Transmitter and receiver inverted          On             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

   PWR     Unidentified       On                   Power is on

   PWR     Unidentified       Off                 Power is off

   RD      Unidentified       On             Modem is receiving data

   RD      Unidentified       Off          Modem is not receiving data

   TD      Unidentified       On           Modem is transmitting data

   TD      Unidentified       Off        Modem is not transmitting data