U.S. ROBOTICS, INC.

DIRECT 2400PC

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      2400bps
Data Bus               8-bit ISA
Data Modulation        Unidentified
Protocol

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       Volume                     SW2

  Line in                     CN2

              DTR SIGNAL

  Setting                SW1/1

  » On              DTR forced high

  Off                  DTR normal

                          RESULT CODES

  Setting                                    SW1/2

  » Off                          Verbose result codes enabled

  On                             Numeric result codes enabled

          RESULT CODES DISPLAY

  Setting                  SW1/3

  » On                Display enabled

  Off                Display disabled

            ECHO COMMANDS DISPLAY

  Setting                      SW1/4

  » Off                  Local echo enabled

  On                    Local echo disabled

                                AUTO ANSWER

  Setting                                            SW1/5

  » On                                Modem does not answer on first ring

  Off                                     Modem answers on first ring

           CARRIER DETECT

  Setting               SW1/6

  » Off               CD normal

  On               CD forced high

                 MULTI-LINE INSTALLATION

  Setting                               SW1/7

  » Off                         Single phone connected

  On                          Multiple phones connected

                    AT COMMAND SET

  Setting                            SW1/8

  » On                       AT command set enabled

  Off                       AT command set disabled

                                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

  FACORY CONFIGURED SETTINGS

    Switch         Setting

    SW1/10           Off

                  BASE I/O ADDRESS SELECTION

       Address                J1                  J2

    COM1: (3F8h)       Pins 1 & 2 closed   Pins 1 & 2 closed

    COM2: (2F8h)       Pins 2 & 3 closed   Pins 1 & 2 closed

    COM3: (3E8h)       Pins 1 & 2 closed   Pins 2 & 3 closed

    COM4: (2E8h)       Pins 2 & 3 closed   Pins 2 & 3 closed

                INTERRUPT

         IRQ                  J5

          3           Pins 3 & 5 closed

          4           Pins 1 & 3 closed

          5           Pins 2 & 4 closed

          7           Pins 4 & 7 closed

                         Proprietary AT Command Set

               See document V1255 for a full command summary.