AST-1200B Modem                                     AST Part Number 240047-002

This is a half-size internal modem with the following characteristics:

   - 0-300 bps and 1200 bps Asynchronous Bell 103A/J and 212A compatible

   - 1200bps CCITT compatible

   - Addressable as COM1, COM2, COM3, and COM4.


SWITCH SETTINGS

     SW1      SW2      Port address
    -------------------------------
      ON       ON          COM1
      ON      OFF          COM2
     OFF       ON          COM3
     OFF      OFF          COM4
    -------------------------------

     SW3 - Control the auto answer mode (Default ON)
     SW4 - Factory test switch (Default OFF)
     SW5 - DTR ON/OFF switch (Default OFF)
     SW6 - CD true/force switch (Default OFF/true)


JUMPER SETTINGS

    Jumper Block J5: A position - CTS follows RTS (Default)
                     B position - CTS follows CD

    Jumper Block J6: COM3 and IRQ assignment
                     A position - Sets IRQ4 (COM1 or COM3) (Default)
                     B position - Sets IRQ5 for COM3

    Jumper Block J7: COM4 and IRQ assignment
                     A position - Sets IRQ3 (COM2 or COM4) (Default)
                     B position - Sets IRQ2 for COM4


SWITCH BLOCK AND JUMPER LOCATIONS

    ͻ
                                      
                                     Ķ
                                      
                                      
                                      
                        J5 *       +- 
                             SW1-6 |  
                                   +- 
                                      
                  J6 *   * J7        Ķ
    ͻ            ͼ 
                    ͼ      
                                        
