
BUSINESSLAND INC.

2400 BPS INTERNAL MODEM (REV. A)

Card Type                    Data (asynchronous)
Chip Set                     Unidentified
Maximum Transfer Rate        2400bps
Data Bus                     8-bit ISA
Data Modulation Protocol     Bell 103/113/212A

                             ITU-T V.22, V.22bis
Error Correction/Compression MNP5, X.PC

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  Line out                        CN1       Line in                 CN2

                        USER CONFIGURABLE SETTINGS

                      Setting                         Label      Position

  Factory configured - Do not alter                   SW1/3       Open

  Factory configured - Do not alter                   SW1/4       Open

            SERIAL PORT ADDRESS

    Setting        SW1/1          SW1/2

  COM1 (3F8h)      Closed         Open

  COM2 (2F8h)       Open          Open

  COM3 (3E8h)      Closed        Closed

  COM4 (2E8h)       Open         Closed

                         Proprietary AT Command Set

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:                  Configuration

  Format:                AT [cmds] %An [cmds]

  Default:               0

  Range:                 0-127

  Unit:                  ASCII

  Description:           Sets the character used as the auto-reliable
                         fallback character. %A0 will disable this
                         function.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:                  Configuration

  Format:                AT [cmds] \Cn [cmds]

  Description:           Controls the handling of incoming data during
                         auto-reliable time period

        Command                              Function

          \C0            Data is discarded

          \C1            Data is buffered

          \C2            Data is discarded, modem returns to normal mode
                         on receiving auto-reliable fallback character

                          BIT-MAPPED REGISTER S14

  Format               AT [cmds] S14=n [cmds]

  Default:             Unidentified

  Range:               0-174

  Unit:                Bit-mapped

  Description:         Controls echo, result codes, result code display,
                       dial mode, and answer/originate mode.

   Bit       Value                          Function

    0              0   Not used

    1               0  Command echo disabled

                   1   Command echo enabled

    2               0  Result codes enabled

                   1   Result codes disabled

    3               0  Display result codes in numeric format

                   1   Display result codes in verbose format

    4              0   Not used

    5               0  Tone dial enabled

                   1   Pulse dial enabled

    6              0   Not used

    7               0  Answer mode enabled

                   1   Originate mode enabled

                          BIT-MAPPED REGISTER S21

  Format              AT [cmds] S21=n [cmds]

  Default:            Unidentified

  Range:              0-184

  Unit:               Bit-mapped

  Description:        Selects low DTR action, DCD signal, and the long
                      space disconnect function.

   Bit      Value                          Function

  2 - 0          0    Not used.

   4, 3          00   DTR Forced

                 01   Modem goes to command mode on low DTR

                 10   Modem disconnects on low DTR. Auto-Answer is
                      disabled.
                11
                      Modem is initialized on low DTR

    5             0   DCD forced high

                 1    DCD normal

    6            0    Not used

    7             0   Long space disconnect function disabled

                 1    Long space disconnect function enabled

                          BIT-MAPPED REGISTER S22

  Format                AT [cmds] S22=n [cmds]

  Default:              Unidentified

  Range:                0-252

  Unit:                 Bit-mapped

  Description:          Controls speaker controls, limits results codes,
                        and make/break ratio.

    Bit       Value                         Function

   1, 0            0    Not used

   3, 2            00   Speaker off

                   01   Speaker off on carrier

                   10   Speaker always on

                  11    Speaker on during handshake

  6, 5, 4         000   Busy and dialtone detection disabled, result
                        codes 0-4 enabled.
                  100
                        Busy and dialtone detection disabled, result
                  101   codes 0-5, 10 enabled.

                  110   Busy tone detection disabled, dialtone detection
                        enabled, result codes 0-6, 10 enabled.
                 111
                        Busy tone detection enabled, dialtone detection
                        disabled, result codes 0-5, 7, 10 enabled.

                        Busy and dialtone detection enabled, result codes
                        0-7, 10 enabled.

     7              0   39/61ms at 10pps (North America)

                   1    33/67ms at 10pps (Europe)

                          BIT-MAPPED REGISTER S23

  Format                AT [cmds] S23=n [cmds]

  Default:              Unidentified

  Range:                0-187

  Unit:                 Bit-mapped

  Description:          Grants/denies remote digital loopback, controls
                        DTE rate and parity, and sets guard tone.

    Bit       Value                         Function

     0              0   Remote digital loopback denied

                   1    Remote digital loopback allowed

  3, 2, 1         000   Sets serial port speed to 0-300bps

                  010   Sets serial port speed to 1200bps

                  011   Sets serial port speed to 2400bps

                 101    Sets serial port speed to 9600bps

    5,4            00   Parity even

                   01   Space Parity

                   10   Parity odd

                  11    Mark/No Parity

   7, 6            00   Guard tone disabled

                   01   Guard tone 550Hz enabled

                  10    Guard tone 1800Hz enabled

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        Data compression enabled

                      DISPLAY CURRENT COMMAND STATUS

  Type:          Immediate

  Format:        AT [cmds] \S [cmds]

  Description:   Displays current setting of modem commands

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Description:   Sets connect mode

    Command                              Function

      \N0        Normal mode enabled

      \N1        Direct mode enabled

      \N2        MNP reliable mode enabled

      \N3        MNP auto-reliable mode enabled

      \N4        X.PC mode only enabled

      \N5        MNP/X.PC answer mode enabled

                         CONVERT TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Y [cmds]

  Description:   Initiates reliable mode link

                                   DIAL

  Type:                  Immediate

  Format:                AT [cmds] D<#> [cmds]

  Description:           Dials telephone number according to any
                         modifiers included in the string

       Modifier                              Function

          D,             Dialing paused for amount of time specified in
                         S8 register

          DT             Tone dialing enabled

          DP             Pulse dialing enabled

          DR             Reverse mode

         DS=n            Number in memory location n dialed

          D;             Modem returned to command mode after dialing.
                         The semicolon can only be placed at the end of
                         the dial command

          D!             Flash function initiated. Modem commanded to go
                         on-hook for specified time

          DW             Dialing resumed following dial tone detection

          D@             Modem waits for a ring-back signal followed by 5
                         seconds of silence prior to executing the rest
                         of the dial string

          DX             Modem in X.PC mode for duration of call

          DM             Modem in MNP auto-reliable mode for duration of
                         call

          DV             Modem in X.PC mode, send X.PC request string.

                         DISPLAY ALL S-REGISTERS

  Type          Immediate

  Format        AT [cmds] %R [cmds]

  Description   Displays a value of all S-registers

                            DSR AND CTS SIGNALS

  Type:          Configuration

  Format:        AT [cmds] \Dn [cmds]

  Description:   Sets the function of the DSR and CTS signals

    Command                              Function

      \D0        DSR and CTS forced high

      \D1        DSR forced high and CTS follows CD

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Description:   Selects modem port flow control

    Command                              Function

      \G0        Flow control disabled

      \G1        Flow control enabled

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Description:   Sets type of flow control used by modem

    Command                              Function

      \Q0        Flow control disabled

      \Q1        XON/XOFF flow control enabled

      \Q2        CTS flow control to DTE enabled

      \Q3        RTS/CTS flow control enabled

                             INACTIVITY TIMER

  Type:                  Configuration

  Format:                AT [cmds] \Tn [cmds]

  Default:               0

  Range:                 0-90

  Unit:                  1 minute

  Description:           Sets the length of time that the modem does not
                         receive information before it disconnects

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Description:   Sets operation of serial port speed

    Command                              Function

      \J0        Serial speed locked

      \J1        Serial speed follows connect speed

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Description:   Selects extended result codes

    Command                              Function

      \V0        Standard AT result codes enabled

      \V1        Error correction result codes enabled

                         ON-LINE IN RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \O [cmds]

  Description:   Returns to on-line and requests reliable mode connection

                          ON-LINE STATE/RDL TEST

  Type                  Configuration

  Format                AT [cmds] On [cmds]

  Description           Starts/ends remote digital loopback test and puts
                        the modem in on-line command mode

       Command                              Function

          O0            Return to on-line state

          O1            End remote digital loopback test and return to
                        on-line state

          O2            Begin remote digital loopback test and return to
                        on-line state

                         PACKET TRANSMISSION DELAY

  Type                Register

  Format              AT [cmds] S50=n [cmds]

  Default             25

  Range               10-255

  Unit                1 ms

  Description         Sets the maximum delay preceding a character from
                      DTE until X.PC block is sent

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays modem properties

    Command                              Function

       I0        Reports product code

       I1        Reports checksum

       I2        Reports checksum result

                          RETURN TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Z [cmds]

  Description:   Ends reliable mode link, initiate return to normal mode

                                TEST MODES

  Format             AT [cmds] S16=n [cmds]

  Default:           Unidentified

  Range:             0-125

  Unit:              Bit-mapped

  Description:       Controls loopback tests, analog, digital, remote
                     digital, and self tests.

   Bit      Value                          Function

    0            0   Local analog loopback not in progress

                1    Local analog loopback in progress

    1           0    Not used

    2            0   Local digital loopback not in progress

                1    Local digital loopback in progress

    3            0   Modem not in remote digital loopback

                1    Remote digital loopback in progress

    4            0   Remote digital loopback not requested

                1    Remote digital loopback requested

    5            0   Remote digital loopback w/ self-test not in progress

                1    Remote digital loopback w/ self-test in progress

    6            0   Local analog loopback w/ self-test not in progress

                1    Local analog loopback w/ self-test in progress

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem

    Command                              Function

      \X0        XON/XOFF signals trapped by local modem

      \X1        XON/XOFF passed through local modem

                              X.PC DISCONNECT

  Type             Immediate

  Format           AT [cmds] %H [cmds]

  Description      Modem will disconnect but still remain connected to
                   network node

