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       # ASPEN TECHNOLOGIES, INC.
       
       
       
          Modem Type             Data (synchronous/asynchronous)/Fax     
          Maximum Data Rate      14.4Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               8-Bit ISA                               
          Fax Class              Class I & II                            
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis                                 
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose      | Location |     Purpose      | Location |
          |-------------------+----------+------------------+----------|
          | Line out          |   CN1    | Line in          |   CN2    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 BASE I/O ADDRESS SELECTION                 |
          |------------------------------------------------------------|
          |        Port        |       JP1/F       |       JP1/G       |
          |--------------------+-------------------+-------------------|
          |    COM1: (3F8h)    |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |    COM2: (2F8h)    |      Closed       |       Open        |
          |--------------------+-------------------+-------------------|
          |    COM3: (3E8h)    |       Open        |      Closed       |
          |--------------------+-------------------+-------------------|
          |    COM4: (2E8h)    |       Open        |       Open        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          |   IRQ   |   JP1/B    |   JP1/C    |   JP1/D    |   JP1/E   |
          |---------+------------+------------+------------+-----------|
          |    3    |    Open    |    Open    |   Closed   |   Open    |
          |---------+------------+------------+------------+-----------|
          |    4    |    Open    |    Open    |    Open    |  Closed   |
          |---------+------------+------------+------------+-----------|
          |    5    |    Open    |   Closed   |    Open    |   Open    |
          |---------+------------+------------+------------+-----------|
          |    7    |   Closed   |    Open    |    Open    |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FACTORY CONFIGURED SETTINGS                 |
          |------------------------------------------------------------|
          |            Switch            |           Setting           |
          |------------------------------+-----------------------------|
          |            JP1/A             |             Off             |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
                  See document V1535 for a full command summary.