
ACER AMERICA CORPORATION

MODEM 2424

Modem Type                   Data (synchronous/asynchronous)
Maximum Data Rate            2400bps
Data Bus                     External
Data Modulation Protocol     Bell 103A/212A, 201

                             ITU-T V.22, V.22bis
Error Correction/Compression MNP4

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line out                    CN1       DC power                   CN4

  Line in                     CN2       Power switch               SW6

  RS-232C                     CN3

           OFF HOOK

    Status          SW4

   Talk mode       Off

  Data mode          On

         ANSWER MODE

    Status          SW3

   Originate       Off

  Answer             On

       MODEM SPEED

    Speed        SW2

   2400bps      Off

  1200bps         On

         AUTO TEST

    Status         SW1

   Disabled       Off

  Enabled          On

                 COMMAND SET DISABLE

          Status                     SW5/1

  AT command set disabled              On

  AT command set enabled              Off

                LINE TYPE

       Status               SW5/2

  Force leased line           On

  Normal operation           Off

    ERROR CORRECTION

   Status      SW5/3

  Disabled      On

  Enabled       Off

          ECHO AND RESULT CODE

       Status              SW5/4

      Disabled              On

  Normal operation          Off

              AUTO ANSWER

       Status              SW5/5

  Set to one ring           On

  Normal operation          Off

      SYNCHRONOUS TRANSMIT CLOCK SOURCE

        Status                 SW5/6

  DTE generates clock            On

   Normal operation             Off

          SYNCRONOUS DATA MODE

       Status              SW5/7

      Enabled               On

  Normal operation          Off

              DSR AND CTS

       Status              SW5/8

     Force high             On

  Normal operation          Off

                             DIAGNOSTIC LED(S)

      LED              Status                      Condition

       EF                On                 Error correction enabled

       EF                Off               Error correction disabled

       HS                On              Modem is operating at 2400bps

       HS                Off            Modem is operating at 1200bps or
                                                     300bps

       AA                On                   Auto answer enabled

       AA                Off                  Auto answer disabled

       CD                On                 Carrier signal detected

       CD                Off              Carrier signal not detected

       OH                On                    Modem is off-hook

       OH                Off                    Modem is on-hook

       RD                On                 Modem is receiving data

       RD                Off              Modem is not receiving data

       SD                On                Modem is transmitting data

       SD                Off             Modem is not transmitting data

       TR                On                    DTR signal is high

       TR                Off                   DTR signal is low

       MR                On                         Power on

       MR                Off                       Power off

       MR             Blinking           Modem is performing self-test

                         Proprietary AT Command Set

                           ACCEPT RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Un

  Example:       AT \U<CR>

  Description:   Accepts remote modems request for reliable link.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:          Configuration

  Format:        AT [cmds] \Cn [cmds]

  Example:       AT \C1 &W<CR>

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

  Command                                Function

   \C0          Data is discarded.

  \C1            Data is buffered.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Register

  Format:            AT [cmds] S20=n [cmds]

  Example:           ATS20=20<CR>

  Default:           0

  Range:             0-127

  Unit:              ASCII

  Description:       Sets the character used as the auto-reliable
                     fallback character. S20=0 will disable this
                     function.

                               AUTO-RETRAIN

  Type:          Configuration

  Format:        AT %En

  Example:       AT %E1 <CR>

  Description:   Selects auto-retrain mode.

  Command                                Function

   %E0          Auto-retrain disabled.

  %E1            Auto-retrain enabled.

                          BIT MAPPED REGISTER S14

  Format                    AT [cmds] S14=n [cmds]

  Example:                  ATS14=40<CR>

  Default:                  170

  Range:                    0 - 253

  Unit:                     Bit-mapped

  Description:              Controls CTS signal, command echo, result
                            codes, command set, dialing mode, and
                            answer/originate mode.

       Bit          Value                       Function

        0            0        CTS normal.

                    1          CTS forced high.

        1           0          Command echo disabled.

                     1        Command echo enabled.

        2            0        Result codes enabled.

                    1          Result codes disabled.

        3           0          Display numeric result codes.

                     1        Display verbose result codes.

        4            0        AT command set enabled.

                    1          AT command set disabled

        5           0          Tone dialing enabled.

                     1        Pulse dialing enabled.

        6           0          Not used

        7           0          Answer mode enabled.

                     1        Originate mode enabled.

                          BIT-MAPPED REGISTER S21

  Format                     AT [cmds] S21=n [cmds]

  Example:                   ATS21=4<CR>

  Default:                   32

  Range:                     0 - 253

  Unit:                      Bit-mapped

  Description:               Selects jack type, CTS signal, low DTR
                             action, DCD signal, DSR signal, and the Long
                             Space Disconnect function.

        Bit          Value                      Function

         0            0        Selects RJ-11, RJ-41S, or RJ45S jack.

                     1          Selects RJ-12 or RJ-13 jack.

         1           0          Not used.

         2           0          CTS follows RTS.

                      1        CTS forced high.

       4, 3           00       DTR signal ignored.

                     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]

  Example:                 ATS22=117<CR>

  Default:                 117

  Range:                   0-127

  Unit:                    Bit-mapped

  Description:             Controls speaker volume and controls, and
                           limits results codes.

       Bit          Value                       Function

       1, 0         00         Off volume.

                     01       On volume.

                    10         Medium level volume.

                    11         High level volume.

       3, 2         00         Speaker off.

                     01       Speaker off on carrier.

                    10         Speaker always on.

                    11         Speaker on during handshake.

     6, 5, 4        000        Basic result codes only enabled.

                    100        Basic and connection speed result codes
                               enabled.
                    101
                               Basic and connection speed result codes
                    110        and dialtone detection enabled.

                     111      All result codes except dialtone detection
                               enabled.

                               All result codes 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]

  Example:                 ATS23=177<CR>

  Default:                 5

  Range:                   0-255

  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.

                    001         Sets serial port speed to 600bps.

                     010       Sets serial port speed to 1200bps.

                    011         Sets serial port speed to 2400bps.

                    100         Sets serial port speed to 4800bps.

                    101         Sets serial port speed to 9600bps.

                    110         Sets serial port speed to 19200bps.

        5,4          00        Even parity.

                    01          Space parity.

                    10          Odd parity.

                    11          Mark or no parity.

       7, 6          00        Guard tone disabled.

                    01          Guard tone disabled.

                    10          Guard tone 1800Hz enabled.

                          BIT-MAPPED REGISTER S27

  Format                 AT [cmds] S27=n [cmds]

  Example:               ATS27=192<CR>

  Default:               9

  Range:                 0 - 127

  Unit:                  Bit-mapped

  Description:           Selects sync/async mode, line type, clock
                         source, and ITU-T/Bell modes.

      Bit       Value                         Function

     1, 0       00          Asynchronous command and data modes.

                01          Asynchronous command, synchronous connect
                            mode.
                 10
                            DTR dialing enabled, synchronous connect
                11          mode.

                            Manual dialing only, synchronous connect
                            mode.

       2         0         Switched line.

                1           Leased line.

       3        0           Not used.

     5, 4        00        Internal DTE transmit clock source.

                01          External DTE transmit clock source.

                10          Slave DTE transmit clock source.

       6         0         ITU-T mode enabled.

                1           Bell mode disabled.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 &W<CR>

  Range:         1-9

  Unit:          .1 second

  Description:   Sends break to modem.

                                   BREAK TYPE

  Type:                   Configuration

  Format:                 AT [cmds] \Kn [cmds]

  Example:                AT \K1 <CR>

  Description:            Configures action of break signal.

   Command      Break from DTE     Break from         Modem        Break from
                                       DTE        receives \B    remote modem
                Reliable/Normal
                     mode         Direct mode

  \K0           Enter command     Send break to   Buffers        Buffers
                mode, do not      remote modem    cleared and    cleared and
                send break to     immediately,    break sent to  break sent to
                remote modem.     then enter      remote modem.  DTE.
                                  command mode.

  \K1           Buffers cleared   Send break to   Buffers        Buffers
                and break sent    remote modem    cleared and    cleared and
                to remote         immediately.    break sent to  break sent to
                modem.                            remote modem.  DTE.

  \K2           Enter command     Send break to   Send break to  Send break to
                mode, do not      remote modem    remote modem   DTE
                send break to     immediately,    immediately.   immediately.
                remote modem.     then enter
                                  command mode.

  \K3           Send break to     Send break to   Send break to  Send break to
                remote modem      remote modem    remote modem   DTE
                immediately.      immediately.    immediately.   immediately.

  \K4           Enter command     Send break to   Send break to  Break sent
                mode, do not      remote modem    remote modem   with received
                send break to     immediately,    with           data to the
                remote modem.     then enter      transmitted    DTE.
                                  command mode.   data.

   \K5         Send break with   Send break to   Send break to  Break sent
                transmitted       remote modem    remote modem   with received
                data.             immediately.    with           data to the
                                                  transmitted    DTE.
                                                  data.

                              CHANGE FUNCTION

  Type:               Configuration

  Format:             AT [cmds] %Z<cmds>

  Example:            AT %Z DP(303)443-3388<CR>

  Description:        Changes the function of SW1 to execute the commands
                      given as a parameter. If no commands are given, it
                      restores default setting of self-test.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 DT555-1212<CR>

  Description:   Sets connect mode.

    Command                              Function

  \N0            Normal mode.

   \N1          Direct mode.

  \N2            Reliable mode.

  \N3            Auto-reliable mode.

                       CONNECTION SPEED UPPER LIMIT

  Type:          Configuration

  Format:        AT [cmds] %Bn [cmds]

  Example:       AT %L3 %B14 \J0<CR>

  Description:   Sets fastest allowed connection speed.

  Command                                Function

  %B300          Select 300bps maximum speed.

  %B600          Select 600bps maximum speed.

  %B1200         Select 1200bps maximum speed.

   %B2400       Select 2400bps maximum speed.

                         CONVERT TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Y [cmds]

  Example:       AT \Y<CR>

  Description:   Initiates reliable mode link.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] \Dn [cmds]

  Example:       AT \D0<CR>

  Description:   Controls action of Clear To Send signal.

  Command                                Function

   \D0          CTS forced high.

  \D1            CTS normal.

                                   DIAL

  Type:             Immediate

  Format:           AT [cmds] D[phone# & modifiers] [;cmds]

  Example:          AT H1 DF 9W *70, 1(303) 555-1212 <CR>

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

  Note:             Any combination of modifiers can be used to produce
                    the desired dial functions in sequence.

  Command                                 Function

        DF          Fast pulse dial, sends 20 pulses per second.

        DX          Dial second stored telephone number

       D\n          Auto redial n times

        DM          Set AT\N3, AT\V1, AT\Q1, AT\J0 until modem returns to
                    on-hook.

                       DISPLAY STORED PHONE NUMBERS

  Type:          Immediate

  Format:        AT [cmds] \F [cmds]

  Example:       AT &Z2=9W1-303-555-1212 \F<CR>

  Description:   Displays all stored phone numbers.

                                 ECHO DATA

  Type:          Configuration

  Format:        AT [cmds] \En [cmds]

  Example:       AT \E0<CR>

  Description:   Displays data sent from DTR to modem

  Command                                Function

   \E0          Disabled

  \E1            Enabled

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Example:       AT \V1 %C1<CR>

  Description:   Selects MNP result codes.

  Command                                Function

   \V0          MNP result codes disabled.

  \V1            MNP result codes enabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q5<CR>

  Description:   Sets type of flow control used by modem.

  Command                                Function

  \Q0            Flow control disabled.

   \Q1          Bidirectional XON/XOFF flow control enabled.

  \Q2            CTS flow control by DCE enabled.

  \Q3            Bidirectional CTS/RTS flow control enabled.

  \Q4            Flow control by DCE disabled.

   \Q5          XON/XOFF flow control by DCE enabled.

  \Q6            RTS flow control by DCE enabled.

                               HELP SCREENS

  Type:          Immediate

  Format:        AT [cmds] ?n [cmds]

  Example:       AT ?1<CR>

  Description:   Displays help menus.

  Command                                Function

   ?1           Displays standard AT command set

  ?2             Displays proprietary & command set

  ?3             Displays dial modifier commands

  ?4             Displays S register contents.

  ?5             Displays proprietary \ command set

                             INACTIVITY TIMER

  Type:             Register

  Format:           AT [cmds] S24=n [cmds]

  Example:          ATS24=20<CR>

  Default:          0

  Range:            0-90

  Unit:             1 minute

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

                             INACTIVITY TIMER

  Type:             Register

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<CR>

  Default:          0

  Range:            0-255

  Unit:             1 second

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

                            INTERFACE PROTOCOL

  Type:          Configuration

  Format:        AT [cmds] \In [cmds]

  Example:       AT \I0<CR>

  Description:   Controls data exchange between applications and modem.

  Command                                Function

   \I0          Disabled.

  \I1            Enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT G1 &M0<CR>

  Description:   Selects modem port flow control.

  Command                                Function

   \G0          Flow control disabled.

  \G1            Flow control enabled.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT %L3 %B14 \J0<CR>

  Description:   Sets operation of serial port speed.

  Command                                Function

  \J0            Serial speed locked.

   \J1          Serial speed follows connect speed.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Example:       AT \A3 %C1<CR>

  Description:   Sets the maximum transmittable block size.

    Command                              Function

      \A0        MNP block size is 64 characters.

      \A1        MNP block size is 128 characters.

      \A2        MNP block size is 192 characters.

      \A3        MNP block size is 256 characters.

                           MNP STREAM/BLOCK MODE

  Type:          Configuration

  Format:        AT [cmds] \Ln [cmds]

  Example:       AT \L1 DT555-1212<CR>

  Description:   Selects the transfer mode for MNP.

  Command                                Function

   \L0          Stream mode for MNP enabled.

  \L1            Block mode after four second delayfor MNP enabled.

  \L2            Block mode for MNP enabled.

                         ON-LINE IN RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \On

  Example:       AT \O<CR>

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

                       REPORT CONFIGURATION PROFILES

  Type:          Immediate

  Format:        AT [cmds] \Sn [cmds]

  Example:       AT \S0<CR>

  Description:   Reports active configuration profiles.

                   REPORT CONFIGURATION SWITCH SETTINGS

  Type:          Immediate

  Format:        AT [cmds] %S [cmds]

  Example:       AT %S<CR>

  Description:   Displays SW5 settings

                         REPORT NORMAL/TEST STATUS

  Type:          Immediate

  Format:        AT [cmds] %F [cmds]

  Example:       AT %F<CR>

  Description:   Displays current setting of SW1 (Normal/Test)

                          REPORT PRODUCT VERSION

  Type:          Immediate

  Format:        AT [cmds] %V [cmds]

  Example:       AT I3 &V1 %V<CR>

  Description:   Reports product version.

                          RETURN TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Z [cmds]

  Example:       AT \Z <CR>

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

                                 RI SIGNAL

  Type:          Configuration

  Format:        AT [cmds] \Rn [cmds]

  Example:       AT \R0 Q0<CR>

  Description:   Controls the behavior of the Ring Indicator signal.

  Command                                Function

  \R0            RI signal high during rings, and forced high for
                 duration of call.

   \R1          RI signal high during rings only.

                    STORE SECOND PHONE NUMBER IN NVRAM

  Type:          Configuration

  Format:        AT [cmds] \Pn [dialstring]

  Example:       AT\P<CR>

  Description:   Stores a second phone number in the modems memory.

                               REDIAL DELAY

  Type:             Register

  Format:           AT [cmds] S19=n [cmds]

  Example:          AT S19=60<CR>

  Default:          45

  Range:            0-255

  Unit:             1 second

  Description:      Configures how long the modem will wait to redial a
                    number after a dial attempt has failed.

                                TEST MODES

  Format                  AT [cmds] S16=n [cmds]

  Example:                ATS16=40<CR>

  Default:                0

  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       Remote digital loopback not in progress.

                    1        Remote digital loopback in progress.

       4             0       Remote digital loopback not requested.

                    1        Remote digital loopback requested.

       5             0       Remote digital loopback with self-test not
                             in progress.
                    1
                             Remote digital loopback with self-test in
                             progress.

       6             0       Local analog loopback with self-test not in
                             progress.
                    1
                             Local analog loopback with self-test in
                             progress.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X0 O<CR>

  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.

