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       # PRACTICAL PERIPHERALS, INC.
       
          PC288HC V.34
       
          Modem Type             Data (synchronous/asynchronous)/Fax     
          Maximum Data Rate      28.8Kbps                                
          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.32,        
                                 V.32bis, V.34                           
                                                                         
                                 Rockwell V.FC                           
          Fax Modulation         ITU-T V.17, 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                 |
          |------------------------------------------------------------|
          |      Address       |       SW1/1       |       SW1/2       |
          |--------------------+-------------------+-------------------|
          |    COM1: (3F8h)    |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |    COM2: (2F8h)    |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |    COM3: (3E8h)    |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |    COM4: (2E8h)    |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          | IRQ     | JP1 pins 1 & 2 | JP1 pins 3 & 4 | JP1 pins 5 & 6 |
          |---------+----------------+----------------+----------------|
          | » 3/4   |     Closed     |      Open      |      Open      |
          |---------+----------------+----------------+----------------|
          | 2       |      Open      |     Closed     |      Open      |
          |---------+----------------+----------------+----------------|
          | 5       |      Open      |      Open      |     Closed     |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                         CALLER ID                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %CCID=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT %CCID=2<CR>                              |
          |--------------+---------------------------------------------|
          | Description: | Controls the Caller ID function.            |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » %CCID=0    | Caller ID disabled.                         |
          |--------------+---------------------------------------------|
          | %CCID=1      | Caller ID displays formatted data.          |
          |--------------+---------------------------------------------|
          | %CCID=2      | Caller ID displays raw hexadecimal data.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CLOCK DOUBLER                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %BAUD=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Example:     | AT %BAUD1<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Doubles the local serial port speed.        |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          | » %BAUD=0    | Clock doubler disabled.                     |
          |--------------+---------------------------------------------|
          | %BAUD=1      | Clock doubler enabled.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       EXTENDED RING                        |
          |------------------------------------------------------------|
          | Format:         | AT [cmds] S101=n [cmds]                  |
          |-----------------+------------------------------------------|
          | Example:        | ATS101=40<CR>                            |
          |-----------------+------------------------------------------|
          | Default:        | 0                                        |
          |-----------------+------------------------------------------|
          | Range:          | 0 - 255                                  |
          |-----------------+------------------------------------------|
          | Unit:           | Bit-mapped                               |
          |-----------------+------------------------------------------|
          | Description:    | Selects the response to extended ring    |
          |                 | types.                                   |
          |------------------------------------------------------------|
          |    Bit    |  Value  |               Function               |
          |-----------+---------+--------------------------------------|
          |     0     | » 0 1   | Do not respond to ring type A.       |
          |           |         |                                      |
          |           |         | Respond to ring type A.              |
          |-----------+---------+--------------------------------------|
          |     1     | » 0 1   | Do not respond to ring type B.       |
          |           |         |                                      |
          |           |         | Respond to ring type B.              |
          |-----------+---------+--------------------------------------|
          |     2     | » 0 1   | Do not respond to ring type C.       |
          |           |         |                                      |
          |           |         | Respond to ring type C.              |
          |-----------+---------+--------------------------------------|
          |     3     | » 0 1   | Do not respond to ring type D.       |
          |           |         |                                      |
          |           |         | Respond to ring type D.              |
          |-----------+---------+--------------------------------------|
          |     4     | » 0 1   | Do not respond to ring type E.       |
          |           |         |                                      |
          |           |         | Respond to ring type E.              |
          |-----------+---------+--------------------------------------|
          |     5     | » 0 1   | Do not respond to ring type F.       |
          |           |         |                                      |
          |           |         | Respond to ring type F.              |
          |-----------+---------+--------------------------------------|
          |     6     | » 0 1   | Do not respond to ring type G.       |
          |           |         |                                      |
          |           |         | Respond to ring type G.              |
          |-----------+---------+--------------------------------------|
          |     7     | » 0 1   | Report RING for all ring types.      |
          |           |         |                                      |
          |           |         | Report RING n where n is the ring    |
          |           |         | type.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HELP SCREENS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $H                                |
          |--------------+---------------------------------------------|
          | Example:     | AT $H<CR>                                   |
          |--------------+---------------------------------------------|
          | Description: | Shows modem help screens.                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           REDIAL                           |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] DL                                |
          |--------------+---------------------------------------------|
          | Example:     | AT M1 DL<CR>                                |
          |--------------+---------------------------------------------|
          | Description: | Redials the last number dialed.             |
          +------------------------------------------------------------+