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       # TELEBIT CORPORATION
       
          TRAILBLAZER PLUS/T2000
       
          Card Type                    Modem (synchronous/asynchronous)  
          Processor                    Motorola 68000                    
          Processor Speed              Unidentified                      
          Chipset                      Unidentified                      
          Maximum Data Rate            18Kbps                            
          Data Bus                     Serial                            
          Data Modulation              Bell 103A/212A                    
                                                                         
                                       ITU-T V.22, V.22bis               
                                                                         
                                       Telebit PEP                       
          Error Correction/Compression MNP3                              
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |  Function  |  Label  |       Function        |    Label    |
          |------------------------------------------------------------|
          | DC power        |    CN1    | Talk/Data switch       | SW1 |
          |-----------------+-----------+------------------------+-----|
          | RS-232/422      |    CN2    | Configuration A/B      | SW2 |
          |                 |           | switch                 |     |
          |-----------------+-----------+------------------------+-----|
          | Line in         |    CN3    | Power switch           | SW3 |
          |-----------------+-----------+------------------------+-----|
          | Line out        |    CN4    |                        |     |
          |------------------------------------------------------------|
          |      Note: The exact locations of SW1 and SW2 are          |
          |      unidentified                                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Setting           |    Label    |    Position    |
          |-----------------------------+-------------+----------------|
          | í 1MB ROMs installed        |     E1      |   Pins 1 & 2   |
          |                             |             |     closed     |
          |-----------------------------+-------------+----------------|
          | 512KB ROMs installed        |     E1      |   Pins 2 & 3   |
          |                             |             |     closed     |
          |------------------------------------------------------------|
          |      Note: When installing 512KB ROMs, the chips should be |
          |      installed in the holes of the sockets furthest from   |
          |      the CPU.                                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED |    Color     | Status |          Condition           |
          |-----+--------------+--------+------------------------------|
          | FST | Unidentified |   On   | Modem is using PEP protocol  |
          |-----+--------------+--------+------------------------------|
          | FST | Unidentified |  Off   |    Modem is not using PEP    |
          |     |              |        |           protocol           |
          |-----+--------------+--------+------------------------------|
          | SLW | Unidentified |   On   |   Modem is using Bell 103,   |
          |     |              |        |  Bell 212, V.22, or V.22bis  |
          |     |              |        |           protocol           |
          |-----+--------------+--------+------------------------------|
          | SLW | Unidentified |  Off   | Modem is not using Bell 103, |
          |     |              |        |  Bell 212, V.22, or V.22bis  |
          |     |              |        |           protocol           |
          |-----+--------------+--------+------------------------------|
          | OH  | Unidentified |   On   |      Modem is off-hook       |
          |-----+--------------+--------+------------------------------|
          | OH  | Unidentified |  Off   |       Modem is on-hook       |
          |-----+--------------+--------+------------------------------|
          | RD  | Unidentified |   On   |   Modem is receiving data    |
          |-----+--------------+--------+------------------------------|
          | RD  | Unidentified |  Off   | Modem is not receiving data  |
          |-----+--------------+--------+------------------------------|
          | SD  | Unidentified |   On   |  Modem is transmitting data  |
          |-----+--------------+--------+------------------------------|
          | SD  | Unidentified |  Off   |  Modem is not transmitting   |
          |     |              |        |             data             |
          |-----+--------------+--------+------------------------------|
          | CTS | Unidentified |   On   |      CTS signal is high      |
          |-----+--------------+--------+------------------------------|
          | CTS | Unidentified |  Off   |      CTS signal is low       |
          |-----+--------------+--------+------------------------------|
          | DTR | Unidentified |   On   |      DTR signal is high      |
          |-----+--------------+--------+------------------------------|
          | DTR | Unidentified |  Off   |      DTR signal is low       |
          |-----+--------------+--------+------------------------------|
          | MR  | Unidentified |   On   |         Power is on          |
          |-----+--------------+--------+------------------------------|
          | MR  | Unidentified |  Off   |         Power is off         |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
                         The command set is unidentified.