
ARCHTEK AMERICA CORPORATION

2834A

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 Protocol     Bell 103J/212A

                             ITU-T V.21, V.22, V.22bis, V.23, V.32,
                             V.32bis, V.34

                             AT&T V.32terbo
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose             Location          Purpose           Location

  Line out                     CN1       AC power                  CN4

  Line in                      CN2       Power switch              SW1

  RS-232/422                   CN3

                         Proprietary AT Command Set

                          AUTO FALLBACK CHARACTER

  Type:          Register

  Format:        AT [cmds] S43=n [cmds]

  Example:       AT S43=13 <CR>

  Default:       13

  Range:         0 - 127

  Unit:          ASCII

  Description:   Set auto fallback character during MNP negotiation.

  Notes          S43=0, disabled. S43=(1 - 127), enabled.

                        AUTO FALL FORWARD/FALLBACK

  Type:          Configuration

  Format:        AT [cmds] %Gn [cmds]

  Example:       AT %G &W <CR>

  Description:   Selects auto fallback in V.22bis and V.32 only.

  Command                                Function

   %G0          Fallback disabled.

  %G1            Fallback enabled.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Configuration

  Format:            AT [cmds] %An [cmds]

  Example:           AT%A0<CR>

  Default:           13

  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]

  Example:          AT \C0 &W<CR>

  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.

                               AUTO-RETRAIN

  Type:          Configuration

  Format:        AT [cmds] %En [cmds]

  Example:       AT %E0 <CR>

  Description:   Selects auto-retrain mode.

  Command                                Function

  %E0            Auto-retrain disabled.

   %E1          Auto-retrain enabled.

                             AUTO SLEEP TIMER

  Format                  AT [cmds] S46=n [cmds]

  Example:                AT S46= 255<CR>

  Default:                255

  Range:                  0 - 255

  Unit:                   .1 second

  Description:            Maximum duration of DTE and DCE inactivity
                          allowed prior to initiating low-power sleep
                          mode.

                          BIT-MAPPED REGISTER S14

  Format                  AT [cmds] S14? [cmds]

  Example:                ATS14?<CR>

  Default:                Read only

  Range:                  0 - 255

  Unit:                   Bit-mapped

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

      Bit        Value                         Meaning

       0         0           Not used.

       1         0           Command echo function disabled.

                 1           Command echo function enabled.

       2         0           Result code sending disabled.

                 1           Result code sending enabled.

       3         0           Numeric format enabled.

                 1           Verbose format enabled.

       4         0           Not used.

       5         0           Tone dialing mode enabled.

                 1           Pulse dialing mode enabled.

       6         0           Result codes normal.

                 1           Result codes disabled in answer mode.

       7         0           Answer mode enabled.

                 1           Originate mode enabled.

                          BIT-MAPPED REGISTER S40

  Format                     AT [cmds] S40=n [cmds]

  Example:                   AT S40=77 <CR>

  Default:                   77

  Range:                     0 - 127

  Unit:                      Bit-mapped

  Description:               Controls active protocols and V.42
                             detection.

        Bit         Value                       Function

         0          0                Automatic mode-detection disabled

                     1              In originate mode, handshake begins
                                     at line speed designated by the S37
                                     register. Modem can shift to a
                                     slower speed if necessary.

                                     In answer mode, handshake attempted
                                     with the following protocols in
                                     order - V.FC, V.32bis, V.32,
                                     V.22bis, V.22 or Bell 212, V.21, and
                                     Bell 103

       5 - 1        00110       Not used.

         6          0           V.42 detection disabled.

                     1         V.42 detection enabled.

                          BIT-MAPPED REGISTER S44

  Format                  AT [cmds] S44=n [cmds]

  Example:                AT S44=7 <CR>

  Default:                7

  Range:                  0 - 23

  Unit:                   Bit-mapped

  Description:            Selects V.42 status, V.42bis, and fallback.

       Bit         Value                       Function

        0          0          V.42bis status disabled.

                    1        V.42bis status enabled.

      2, 1         00         V.42bis disabled.

                   01         V.42bis when transmitting enabled.

                   10         V.42bis when receiving enabled.

                    11       V.42bis when transmitting/receiving
                              enabled.

        3          0          Not used.

        4           0        Fallback disabled.

                   1          Fallback enabled.

     7, 6, 5       0          Not used.

                          BIT-MAPPED REGISTER S49

  Type:          Register

  Format:        AT [cmds] S49=n [cmds]

  Example:       AT S49=255<CR>

  Description:   Set maximum block size.

  Command                                Function

  S49=64         Maximum MNP block size is 64 characters.

  S49=127        Maximum MNP block size is 127 characters.

  S49=191        Maximum MNP block size is 191 characters.

   S49=255      Maximum MNP block size is 255 characters.

                          BIT-MAPPED REGISTER S51

  Format                    AT [cmds] S51=n [cmds]

  Example:                  AT S51=40 <CR>

  Default:                  3

  Range:                    0 - 115

  Unit:                     Bit-mapped

  Description:              selects flow control,

       Bit          Value                       Function

     2, 1, 0        000         Flow control disabled.

                    001         XON/XOFF flow control enabled.

                    010         CTS flow control to DTE enabled.

                     011       RTS/CTS flow control enabled.

        3           0           Not used.

        4            0         Flow control disabled.

                    1           Flow control to XON/XOFF flow enabled.

        5            0         Serial speed locked.

                    1           Serial speed follows connect speed.

       7, 6          00        XON/XOFF signals trapped by local modem.

                    01          XON/XOFF passed through local modem.

                          BIT-MAPPED REGISTER S54

  Format                 AT [cmds] S54=n [cmds]

  Example:               AT S54=69 <CR>

  Default:               0

  Range:                 0 - 131

  Unit:                  Bit-mapped

  Description:           Selects the communication protocol for data
                         calls, and protocol result code.

      Bit         Value                        Function

       0           0         B2 is enabled.

                  1           B2 is not enabled.

       1           0         B3 is enabled

                  1           B3 is not enabled.

     6 - 2        0           Not used.

       7           0         Protocol result code disabled.

                  1           Protocol result code enabled.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B0 &W<CR>

  Default:       0

  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.

                            BTLZ STRING LENGTH

  Type:          Register

  Format:        AT [cmds] S58=n [cmds]

  Example:       AT S58=32 <CR>

  Default:       32

  Range:         6 - 64

  Unit:          Unidentified

  Description:   Selects BTLZ string length.

                               CALLING TONE

  Type:             Configuration

  Format:           AT [cmds] -Cn [cmds]

  Example:          AT -C0 &W<CR>

  Description:      Controls whether the DTE will allow the modem to send
                    a 1300Hz calling tone when originating.

  Command                                 Function

   -C0             Disable calling tone.

  -C1               Enable calling tone.

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Example:       AT %C0 <CR>

  Description:   Selects data compression.

  Command                                Function

  %C0            Data compression disabled.

   %C1          Data compression enabled.

                              CONNECT MESSAGE

  Type:          Configuration

  Format:        AT [cmds] S41=n [cmds]

  Example:       AT S41=0<CR>

  Description:   Controls CONNECT message.

    Command                              Function

   S41=0        CONNECT with DTE speed.

  S41=1          CONNECT with carrier, protocol, and compression.

  S41=2          CONNECT with DCE speed.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N0 DT555-1212<CR>

  Description:   Sets connect mode.

  Command                                Function

  \N0            Normal mode enabled.

  \N1            Direct mode enabled.

  \N2            Reliable mode enabled.

   \N3          Auto-reliable mode enabled.

  \N4            LAPM mode enabled.

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Example:       AT \V1 %C1<CR>

  Description:   Selects extended result codes.

  Command                                Function

   \V0          Extended result codes disabled.

  \V1            Extended result codes enabled.

                               FAX/DATA MODE

  Type:          Register

  Format:        AT [cmds] S50=n [cmds]

  Example:       AT S50=0 &W<CR>

  Description:   Choose data or FAX mode.

  Command                                Function

   S50=0        Data mode enabled.

  S50=1          FAX mode enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT \G0 &K3<CR>

  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]

  Example:       AT \Q0 A <CR>

  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.

                             FLOW CONTROL TYPE

  Type:          Register

  Format:        AT [cmds] S52=n [cmds]

  Example:       AT &G1 S52=0 <CR>

  Description:   Sets type of flow control used by modem.

  Command                                Function

  S52=0          Flow control disabled.

  S52=1          Not used.

  S52=2          Not used.

   S52=3        CTS/RTS flow control enabled.

  S52=4          XON/XOFF pass-through flow control enabled.

                             INACTIVITY TIMER

  Type:             Configuration

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<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.

                          LOCAL SERIAL PORT SPEED

  Type:          Register

  Format:        AT [cmds] S72=n [cmds]

  Example:       AT S72=0<CR>

  Description:   Sets serial port speed.

  Command                                Function

   S72=0        Sets speed automatically.

  S72=1          Sets 300bps speed.

  S72=2          Sets 600bps speed.

  S72=3          Sets 1200bps speed.

  S72=4          Sets 2400bps speed.

  S72=5          Sets 4800bps speed.

  S72=6          Sets 7200bps speed.

  S72=7          Sets 9600bps speed.

  S72=8          Sets 12Kbps speed.

  S72=9          Sets 14.4Kbps speed.

  S72=10         Sets 16.8Kbps speed.

  S72=11         Sets 19.2Kbps speed.

  S72=12         Sets 21.6Kbps speed.

  S72=13         Sets 24Kbps speed.

  S72=14         Sets 26.4Kbps speed.

  S72=15         Sets 28.8Kbps speed.

  S72=16         Sets 38.4Kbps speed.

  S72=17         Sets 57.6Kbps speed.

  S72=18         Sets 115.2Kbps speed.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT \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.

                           MODEM OPERATING MODE

  Type:          Register

  Format:        AT [cmds] S53=n [cmds]

  Example:       AT S53=3 <CR>

  Description:   Sets connect mode.

  Command                                Function

  S53=0          Normal mode enabled.

  S53=1          Direct mode enabled.

  S53=2          MNP reliable mode enabled.

   S53=3        Auto-reliable mode enabled.

  S53=4          LAPM reliable mode enabled.

                                MNP OPTIONS

  Type:          Register

  Format:        AT [cmds] S59=n [cmds]

  Example:       AT S59=0 <CR>

  Description:   Selects MNP5 status.

  Command                                Function

  S59=0          Data compression disabled.

   S59=1        Data compression enabled.

                           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.

                             V.32 AUTO-RETRAIN

  Type:          Register

  Format:        AT [cmds] S42=n [cmds]

  Example:       AT S42=0 &W<CR>

  Description:   Controls V.32 Auto-retrain.

  Command                                Function

  S42=0          Auto-retrain disabled, hang up.

   S42=1        Auto-retrain on line quality problem enabled.

  S42=2          Modem ignores line quality problems.

                           V.42 DETECTION PHASE

  Type:          Configuration

  Format:        AT [cmds] -Jn [cmds]

  Example:       AT -J0 &W<CR>

  Description:   Controls V.42 detection.

  Command                                Function

  -J0            V.42 detection disabled.

   -J1          V.42 detection enabled.

                        V.42bis COMPRESSION CONTROL

  Type:          Configuration

  Format:        AT [cmds] "Hn [cmds]

  Example:       AT "H0 &W<CR>

  Description:   Controls V.42bis data compression

  Command                                Function

  "H0            V.42bis disabled.

  "H1            V.42bis when transmitting enabled.

  "H2            V.42bis when receiving enabled.

   "H3          V.42bis when transmitting/receiving enabled.

                       V.42bis MAXIMUM STRING LENGTH

  Type:          Immediate

  Format:        AT [cmds] "On [cmds]

  Example:       AT "O32 <CR>

  Default:       32

  Range:         6 - 250

  Unit:          ASCII character

  Description:   Selects string size for V.42bis compression.

                           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.

