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        C/CCITT V.24/V.28                       
   Protocol               
   Error                  Unidentified                            
   Correction/Compression 
   Data Bus               External                                

<gopher://bitreich.org/I/th99/t/U-Z/55415-1.png>
   

   +------------------------------------------------------------+
   |                        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  |
   +------------------------------------------------------------+