(TXT) View Source
       
       # 3COM CORPORATION
       
          US ROBOTICS 2400PC
       
          Modem Type               Data (synchronous/asynchronous)       
          Maximum Data Rate        2400bps                               
          Data Bus                 8-bit ISA                             
          Fax Class                Class I & II                          
          Data Modulation Protocol Bell 103A/212A                        
                                                                         
                                   ITU-T V.21, V.22                      
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose      | Location |     Purpose      | Location |
          |-------------------+----------+------------------+----------|
          | Line out          |   CN1    | Volume           |   SW2    |
          |-------------------+----------+------------------+----------|
          | Line in           |   CN2    |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DTR SIGNAL                         |
          |------------------------------------------------------------|
          | Setting                       |           SW1/1            |
          |-------------------------------+----------------------------|
          | » DTR forced high             |             On             |
          |-------------------------------+----------------------------|
          | DTR normal                    |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RESULT CODES                        |
          |------------------------------------------------------------|
          | Setting                       |           SW1/2            |
          |-------------------------------+----------------------------|
          | » Verbal result codes enabled |            Off             |
          |-------------------------------+----------------------------|
          | Numeric result codes enabled  |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    RESULT CODES DISPLAY                    |
          |------------------------------------------------------------|
          | Setting                       |           SW1/3            |
          |-------------------------------+----------------------------|
          | » Display disabled            |             On             |
          |-------------------------------+----------------------------|
          | Display enabled               |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        ECHO DISPLAY                        |
          |------------------------------------------------------------|
          | Setting                       |           SW1/4            |
          |-------------------------------+----------------------------|
          | » Local echo enabled          |            Off             |
          |-------------------------------+----------------------------|
          | Local echo disabled           |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        AUTO ANSWER                         |
          |------------------------------------------------------------|
          | Setting                               |       SW1/5        |
          |---------------------------------------+--------------------|
          | » Modem does not answer on first ring |         On         |
          |---------------------------------------+--------------------|
          | Modem answers on first ring           |        Off         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CARRIER DETECT                       |
          |------------------------------------------------------------|
          | Setting                       |           SW1/6            |
          |-------------------------------+----------------------------|
          | » CD normal                   |            Off             |
          |-------------------------------+----------------------------|
          | CD forced high                |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                MULTIPLE PHONE INSTALLATION                 |
          |------------------------------------------------------------|
          | Setting                       |           SW1/7            |
          |-------------------------------+----------------------------|
          | » Single phone connected      |            Off             |
          |-------------------------------+----------------------------|
          | Multiple phones connected     |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       AT COMMAND SET                       |
          |------------------------------------------------------------|
          | Setting                       |           SW1/8            |
          |-------------------------------+----------------------------|
          | » AT command set recognized   |             On             |
          |-------------------------------+----------------------------|
          | AT command set disabled       |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        ESCAPE CODE                         |
          |------------------------------------------------------------|
          | Setting |                      SW1/9                       |
          |---------+--------------------------------------------------|
          | » On    |  Go to command mode and display OK result code   |
          |         |        when escape character is received         |
          |---------+--------------------------------------------------|
          | Off     |  Disconnect, go to command mode and display NO   |
          |         |    CARRIER when escape character is received     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FACTORY CONFIGURED SETTINGS                 |
          |------------------------------------------------------------|
          |           Switch            |           Setting            |
          |-----------------------------+------------------------------|
          |           SW1/10            |           Not used           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   COM PORT CONFIGURATION                   |
          |------------------------------------------------------------|
          |       Port       |         J1         |         J2         |
          |------------------+--------------------+--------------------|
          |   COM1: (3F8h)   | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |   COM2: (3E8h)   | Pins 3 & 4 closed  | Pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |   COM3: (2F8h)   | Pins 1 & 2 closed  | Pins 3 & 4 closed  |
          |------------------+--------------------+--------------------|
          |   COM4: (2E8h)   | Pins 3 & 4 closed  | Pins 3 & 4 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          |            IRQ             |              J3               |
          |----------------------------+-------------------------------|
          |             3              |       Pins 3 & 5 closed       |
          |----------------------------+-------------------------------|
          |             4              |       Pins 1 & 3 closed       |
          |----------------------------+-------------------------------|
          |             5              |       Pins 2 & 4 closed       |
          |----------------------------+-------------------------------|
          |             7              |       Pins 4 & 6 closed       |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                 ANALOG LOOPBACK SELF TEST                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S16=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Example:     | ATS16=139<CR>                               |
          |--------------+---------------------------------------------|
          | Description: | Selects the tone dialing test.              |
          |--------------+---------------------------------------------|
          | Command      |                  Function                   |
          |--------------+---------------------------------------------|
          |      0       | Data mode.                                  |
          |--------------+---------------------------------------------|
          |      1       | Analog loopback.                            |
          |--------------+---------------------------------------------|
          |      2       | Dial testing.                               |
          |--------------+---------------------------------------------|
          |      4       | Test pattern.                               |
          |--------------+---------------------------------------------|
          |      5       | Analog loopback and test pattern.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CLOCK DISPLAY                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Kn [cmds]                         |
          |--------------+---------------------------------------------|
          | Example:     | AT K1 *L2 #E1<CR>                           |
          |--------------+---------------------------------------------|
          | Description: | Automatically establishes switched line     |
          |              | connection if leased line fails             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      K0      | Display length of last call.                |
          |--------------+---------------------------------------------|
          |      K1      | Display actual time.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        HELP SCREENS                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT <prefix>$                                |
          |--------------+---------------------------------------------|
          | Example:     | AT &$<CR>                                   |
          |--------------+---------------------------------------------|
          | Description: | Shows command help screens for all commands |
          |              | beginning with the given prefix, or no      |
          |              | prefix if none is given.                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      $       | Shows ATx help screen.                      |
          |--------------+---------------------------------------------|
          |      D$      | Shows ATDx help screen.                     |
          |--------------+---------------------------------------------|
          |      S$      | Shows S-register help screen.               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   REPEAT COMMAND STRING                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] > [cmds]                          |
          |--------------+---------------------------------------------|
          | Example:     | AT *D1 > #E1<CR>                            |
          |--------------+---------------------------------------------|
          | Description: | Causes modem to repeat command string until |
          |              | a keyboard key is pressed.                  |
          +------------------------------------------------------------+