WESTERMO TELEINDUSTRI AB
========================

   TD-23 AC

   Card Type        Modem                                         
   Chip Set         Unidentified                                  
   I/O Options      9-pin serial port (RS-232), terminal blocks   
                    (3)                                           
   Data Modulation  ITU-T V.11, V.23, V.24/V.28                   
   Protocol         
   Wiring Type      Unshielded twisted pair                       
   Maximum Transfer 1200bps                                       
   Rate             
   Data Bus         External                                      

<gopher://bitreich.org/I/th99/t/U-Z/55198-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |         Function          |   Label    | Function  | Label |
   |------------------------------------------------------------|
   | Relay connector        |  CN1  | AC power        |   CN4   |
   | (screws 1 & 2)         |       | connector (3    |         |
   |                        |       | pole terminal   |         |
   |                        |       | block)          |         |
   |------------------------+-------+-----------------+---------|
   | RS-232-C/V.24          |  CN2  | Line connector  |   CN5   |
   | interface (screws 3 -  |       | (4 pole         |         |
   | 5)                     |       | terminal block) |         |
   |------------------------+-------+-----------------+---------|
   | RS-422/485 interface   |  CN3  | 9-pin serial    |   CN6   |
   | (screws 6 - 9)         |       | port            |         |
   |------------------------------------------------------------|
   | Note: CN1, CN2, & CN3 are separate interfaces on a 9 pole  |
   | terminal block                                             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                 Setting                 | Label | Position |
   |-----------------------------------------+-------+----------|
   | i 2-wire mode enabled (line side)       | S2/6  |    On    |
   |-----------------------------------------+-------+----------|
   | 4-wire mode enabled enabled (line side) | S2/6  |   Off    |
   |-----------------------------------------+-------+----------|
   | i 23ms RTS/CTS delay enabled            | S2/9  |   Off    |
   |-----------------------------------------+-------+----------|
   | 60ms RTS/CTS delay enabled              | S2/9  |    On    |
   |-----------------------------------------+-------+----------|
   | i Activity timer disabled               | S3/7  |   Off    |
   |-----------------------------------------+-------+----------|
   | 1min activity timer enabled             | S3/7  |    On    |
   |-----------------------------------------+-------+----------|
   | i Filter enabled; receive data is       | S3/8  |    On    |
   | buffered for 6ms                        |       |          |
   |-----------------------------------------+-------+----------|
   | Filter disabled                         | S3/8  |   Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      LINE TERMINATION                      |
   |------------------------------------------------------------|
   |                Setting                |   S1/1   |  S1/2   |
   |---------------------------------------+----------+---------|
   |      i Line termination disabled      |   Off    |   Off   |
   |---------------------------------------+----------+---------|
   |       Line termination enabled        |    On    |   On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     TRANSMISSION LEVEL                     |
   |------------------------------------------------------------|
   |           Setting           |  S2/1   |   S2/2   |  S2/3   |
   |-----------------------------+---------+----------+---------|
   |            3dBm             |   Off   |   Off    |   Off   |
   |-----------------------------+---------+----------+---------|
   |            -3dBm            |   On    |   Off    |   Off   |
   |-----------------------------+---------+----------+---------|
   |            -6dBm            |   Off   |    On    |   Off   |
   |-----------------------------+---------+----------+---------|
   |           i -9dBm           |   On    |    On    |   Off   |
   |-----------------------------+---------+----------+---------|
   |           -10dBm            |   Off   |   Off    |   On    |
   |-----------------------------+---------+----------+---------|
   |           -12dBm            |   On    |   Off    |   On    |
   |-----------------------------+---------+----------+---------|
   |           -13dBm            |   Off   |    On    |   On    |
   |-----------------------------+---------+----------+---------|
   |           -15dBm            |   On    |    On    |   On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DCD DETECTION LEVEL                     |
   |------------------------------------------------------------|
   |                Setting                |   S2/4   |  S2/5   |
   |---------------------------------------+----------+---------|
   |                i 3dBm                 |   Off    |   On    |
   |---------------------------------------+----------+---------|
   |                 10dBm                 |    On    |   On    |
   |---------------------------------------+----------+---------|
   |                 -3dBm                 |    On    |   Off   |
   |---------------------------------------+----------+---------|
   |                -15dBm                 |   Off    |   Off   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      CARRIER CONTROL                       |
   |------------------------------------------------------------|
   |                   Setting                    | S2/7 | S2/8 |
   |----------------------------------------------+------+------|
   |         i Carrier controlled by RTS          |  On  |  On  |
   |----------------------------------------------+------+------|
   | Transmitter activated by incoming data; data | Off  |  On  |
   |   is buffered while carrier is established   |      |      |
   |----------------------------------------------+------+------|
   |        Permanent carrier established         |  On  | Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |       2-WIRE/4-WIRE MODE SELECTION (RS-422/485 SIDE)       |
   |------------------------------------------------------------|
   |                Setting                |   S3/1   |  S3/2   |
   |---------------------------------------+----------+---------|
   |         i 2-wire mode enabled         |    On    |   Off   |
   |---------------------------------------+----------+---------|
   |      4-wire mode enabled enabled      |   Off    |   On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   RS-422/485 TERMINATION                   |
   |------------------------------------------------------------|
   |            Setting             | S3/3 | S3/4 | S3/5 | S3/6 |
   |--------------------------------+------+------+------+------|
   |    i RS-422/485 termination    | Off  | Off  | Off  | Off  |
   |            disabled            |      |      |      |      |
   |--------------------------------+------+------+------+------|
   |   2-wire termination enabled   |  On  |  On  | Off  | Off  |
   |            (RS-485)            |      |      |      |      |
   |--------------------------------+------+------+------+------|
   |   4-wire termination enabled   | Off  | Off  |  On  |  On  |
   |            (RS-422)            |      |      |      |      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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             |
   |-----+--------------+--------+------------------------------|
   | RTS | Unidentified |   On   |      RTS signal is high      |
   |-----+--------------+--------+------------------------------|
   | RTS | Unidentified |  Off   |      RTS signal is low       |
   |-----+--------------+--------+------------------------------|
   | CTS | Unidentified |   On   |  CTS signal is high. Device  |
   |     |              |        |      ready to send data      |
   |-----+--------------+--------+------------------------------|
   | CTS | Unidentified |  Off   |      CTS signal is low       |
   |-----+--------------+--------+------------------------------|
   | DCD | Unidentified |   On   |     Data carrier present     |
   |-----+--------------+--------+------------------------------|
   | DCD | Unidentified |  Off   |  Data carrier not present.   |
   |     |              |        |  Connection not established  |
   +------------------------------------------------------------+