U.S. ROBOTICS, INC.
===================

   PASSWORD MODEM

   Modem Type               Data (synchronous/asynchronous)       
   Maximum Data Rate        1200bps                               
   Data Bus                 External                              
   Data Modulation Protocol Bell 103A/212A                        

<gopher://bitreich.org/I/th99/t/U-Z/51262-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose     | Location |      Purpose       | Location |
   |-----------------+----------+--------------------+----------|
   | Line in         |   CN1    | RS-232/422         |   CN3    |
   |-----------------+----------+--------------------+----------|
   | DC power        |   CN2    | Power switch       |   SW2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MULTILINE PHONE INSTALLATION                |
   |------------------------------------------------------------|
   | Setting                       |             J1             |
   |-------------------------------+----------------------------|
   |>> Single line                 |            Off             |
   |-------------------------------+----------------------------|
   | Multiline                     |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      CHARACTER LENGTH                      |
   |------------------------------------------------------------|
   | Setting                       |             J2             |
   |-------------------------------+----------------------------|
   |>> 10-bit                      |            Off             |
   |-------------------------------+----------------------------|
   | 11-bit                        |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                TRANSMIT AND RECEIVE SIGNAL                 |
   |------------------------------------------------------------|
   | Setting            |        J3         |        J4         |
   |--------------------+-------------------+-------------------|
   |>> Normal pin       | Pins 1 & 2 closed | Pins 1 & 2 closed |
   | assignment         |                   |                   |
   |--------------------+-------------------+-------------------|
   | Tx/Rx pins         | Pins 2 & 3 closed | Pins 2 & 3 closed |
   | reversed           |                   |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  ANLOG LOOPBACK TEST MODE                  |
   |------------------------------------------------------------|
   | Setting                    |              J5               |
   |----------------------------+-------------------------------|
   |>> On                       |       Normal operation        |
   |----------------------------+-------------------------------|
   | Off                        |     Analog loopback mode      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        AUTO ANSWER                         |
   |------------------------------------------------------------|
   | Setting              |                SW1/1                |
   |----------------------+-------------------------------------|
   |>> Off                |     Modem answers on first ring     |
   |----------------------+-------------------------------------|
   | On                   | Modem does not answer on first ring |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       CARRIER DETECT                       |
   |------------------------------------------------------------|
   | Setting                    |             SW1/2             |
   |----------------------------+-------------------------------|
   |>> Off                      |           CD normal           |
   |----------------------------+-------------------------------|
   | On                         |        CD forced high         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          PBX MODE                          |
   |------------------------------------------------------------|
   | Setting                 |              SW1/3               |
   |-------------------------+----------------------------------|
   |>> Off                   | Normal dial up line equalization |
   |-------------------------+----------------------------------|
   | On                      |          PBX operation           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         DTR SIGNAL                         |
   |------------------------------------------------------------|
   | Setting                    |             SW1/4             |
   |----------------------------+-------------------------------|
   |>> Off                      |          DTR normal           |
   |----------------------------+-------------------------------|
   | On                         |        DTR forced high        |
   +------------------------------------------------------------+