ASPEN TECHNOLOGIES, INC.
========================

   28IRF

   Card Type              Modem (asynchronous)                    
   Chipset                Sierra                                  
   Maximum Data Rate      28.8Kbps                                
   Maximum Fax Rate       14.4Kbps                                
   Data Modulation        Bell 103A, 212A                         
                                                                  
                          ITU-T V.21, V.22, V.22bis, V.32,        
                          V.32bis, V.34                           
   Fax Modulation         Unidentified                            
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 
   Fax Class              Class I & II                            
   Data Bus               8-bit ISA                               
   Card Size              Full height, half length                

<gopher://bitreich.org/I/th99/t/A-B/53683-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | Telephone line       |  CN1  | Telephone line      |  CN2  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                 | Label | Position  |
   |----------------------------------------+-------+-----------|
   | i Factory configured - do not alter    |  JP1  |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT ADDRESS SELECTION                |
   |------------------------------------------------------------|
   |      Setting       |        JP6        |        JP7        |
   |--------------------+-------------------+-------------------|
   |    3F8h (COM1:)    |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |    2F8h (COM2:)    |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |    3E8h (COM3:)    |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |    2E8h (COM4:)    |       Open        |       Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |  Setting   |    JP2    |    JP3    |    JP4    |    JP5    |
   |------------+-----------+-----------+-----------+-----------|
   |     3      |   Open    |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     4      |   Open    |   Open    |   Open    |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     5      |   Open    |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     7      |  Closed   |   Open    |   Open    |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SUPPORTED STANDARD COMMANDS                 |
   |------------------------------------------------------------|
   |                     Basic AT Commands                      |
   |------------------------------------------------------------|
   | +++, 'comma', A/                                           |
   |------------------------------------------------------------|
   | A, D, E, H, L, M, O, P, Q, T, V, X, Y, Z                   |
   |------------------------------------------------------------|
   | &C, &D, &F, &T, &V, &W, &Y, &Z                             |
   |------------------------------------------------------------|
   |                    Extended AT Commands                    |
   |------------------------------------------------------------|
   | \Q                                                         |
   |------------------------------------------------------------|
   | %A, %C, %Q                                                 |
   |------------------------------------------------------------|
   |                        S-Registers                         |
   |------------------------------------------------------------|
   | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S18,     |
   | S25, S26, S38                                              |
   |------------------------------------------------------------|
   |      Note: See MHI help file for complete information.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   UNIDENTIFIED COMMANDS                    |
   |------------------------------------------------------------|
   |          Command           |            Default            |
   |----------------------------+-------------------------------|
   |            S40             |         Unidentified          |
   |----------------------------+-------------------------------|
   |            S41             |         Unidentified          |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

  See ASPEN TECHNOLOGIES, INC. 28IDSSA for a full command summary.