PRACTICAL PERIPHERALS, INC.
===========================

   MC288MT II V.34/PC288MT II V.34

   Modem Type             Data (synchronous/asynchronous)/Fax     
   Maximum Data Rate      28.8Kbps                                
   Maximum Fax Rate       14.4Kbps                                
   Data Bus               External                                
   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 

<gopher://bitreich.org/I/th99/t/P-R/51183-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose      | Location |      Purpose      | Location |
   |------------------+----------+-------------------+----------|
   | Line out         |   CN1    | DC power          |   CN4    |
   |------------------+----------+-------------------+----------|
   | Line in          |   CN2    | Power switch      |   SW1    |
   |------------------+----------+-------------------+----------|
   | RS-232/422       |   CN3    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color |  Status  |             Condition             |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |    On    |        Auto-answer enabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |   Off    |       Auto-answer disabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  | Blinking |         Phone is ringing          |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  |    On    |      Modem is receiving data      |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  |   Off    |    Modem is not receiving data    |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  |    On    |    Modem is transmitting data     |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  |   Off    |  Modem is not transmitting data   |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |    On    |      Carrier signal detected      |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |   Off    |    Carrier signal not detected    |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  | Blinking |        Modem is retraining        |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |    On    |         Modem is off-hook         |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |   Off    |         Modem is on-hook          |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |    On    | Modem is operating at 4800bps or  |
   |     |       |          |              faster               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |   Off    | Modem is operating at slower than |
   |     |       |          |              4800bps              |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |    On    |        DTR signal is high         |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |   Off    |         DTR signal is low         |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |    On    |            Power is on            |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |   Off    |           Power is off            |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |                        COMMAND SET                         |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] %DUMBn [cmds]                     |
   |--------------+---------------------------------------------|
   | Example:     | AT %DUMB1<CR>                               |
   |--------------+---------------------------------------------|
   | Description: | Disables the AT command set.                |
   |--------------+---------------------------------------------|
   | Note:        | The AT command set is always active for the |
   |              | first 20 seconds after the modem is powered |
   |              | up. AT%DUMB0 can be entered during this     |
   |              | time period to re-enable the command set.   |
   |--------------+---------------------------------------------|
   | Command      |                  Function                   |
   |--------------+---------------------------------------------|
   |>> %DUMB0     | Command set enabled.                        |
   |--------------+---------------------------------------------|
   | %DUMB1       | Command set disabled.                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     LAP-M PACKET SIZE                      |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S136=n [cmds]                     |
   |--------------+---------------------------------------------|
   | Example:     | AT S136=2 %C1<CR>                           |
   |--------------+---------------------------------------------|
   | Description: | Sets the frame size for an LAP-M            |
   |              | connection.                                 |
   |--------------+---------------------------------------------|
   | Command      |                  Function                   |
   |--------------+---------------------------------------------|
   | S136=0       | Select 128 byte frame size.                 |
   |--------------+---------------------------------------------|
   |>> S136=1     | Select 256 byte frame size.                 |
   |--------------+---------------------------------------------|
   | S136=2       | Select 512 byte frame size.                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           REDIAL                           |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] DL                                |
   |--------------+---------------------------------------------|
   | Example:     | AT M1 DL<CR>                                |
   |--------------+---------------------------------------------|
   | Description: | Redials the last number dialed.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     REPORT INFORMATION                     |
   |------------------------------------------------------------|
   | Type:        | Immediate                                   |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] In [cmds]                         |
   |--------------+---------------------------------------------|
   | Example:     | AT I1 &W<CR>                                |
   |--------------+---------------------------------------------|
   | Description: | Displays modem properties.                  |
   |--------------+---------------------------------------------|
   | Command      |                  Function                   |
   |--------------+---------------------------------------------|
   |      I0      | Reports modem model and speed.              |
   |--------------+---------------------------------------------|
   |      I1      | Reports checksum number.                    |
   |--------------+---------------------------------------------|
   |      I2      | Reports checksum result.                    |
   |--------------+---------------------------------------------|
   |      I3      | Reports firmware version.                   |
   |--------------+---------------------------------------------|
   |      I4      | Reports current command settings.           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   V.22 PROBE REJECT TIME                   |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S97=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Example:     | ATS97=15<CR>                                |
   |--------------+---------------------------------------------|
   | Default:     | 30                                          |
   |--------------+---------------------------------------------|
   | Range:       | 15-70                                       |
   |--------------+---------------------------------------------|
   | Unit:        | .1 second                                   |
   |--------------+---------------------------------------------|
   | Description: | Sets the time for which the modem will      |
   |              | reject the V.22/V.22bis probe signal when   |
   |              | in V.32 mode.                               |
   +------------------------------------------------------------+