
MOTOROLA, INC.

V.3400

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     External
Fax Class                    Class I
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis,
                             V.33, V.34
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

  YES button                 BT1       Leased line out             CN2

  NO button                  BT2       RS-232/422                  CN3

  TALK/DATA button           BT3       Fuse                       FUSE

  Switched line out          CN1       Power switch                SW1

                          DIAGNOSTIC LED(S)

    LED        Color       Status               Condition

     TR         Red          On             DTR signal is high

     TR         Red         Off             DTR signal is low

     CS         Red          On             CTS signal is high

     CS         Red         Off             CTS signal is low

     RS         Red          On             RTS signal is high

     RS         Red         Off             RTS signal is low

     CD         Red          On          Carrier signal detected

     CD         Red         Off        Carrier signal not detected

     RD         Red          On          Modem is receiving data

     RD         Red         Off        Modem is not receiving data

     TD         Red          On         Modem is transmitting data

     TD         Red         Off       Modem is not transmitting data

                         Proprietary AT Command Set

                           ANSWER/ORIGINATE MODE

  Type:          Configuration

  Format:        AT [cmds] *ORn [cmds]

  Example:       AT *OR0<CR>

  Description:   Selects whether the modem is in answer or originate
                 mode.

  Command                                Function

   *OR0         Modem is in originate mode.

  *OR1           Modem is in answer mode.

                           AUTO-ANSWER OVERRIDE

  Type:           Immediate

  Format:         AT [cmds] *IC [cmds]

  Example:        AT *IC<CR>

  Description:    Instructs the modem to ignore the incoming call, if the
                  modem is set to automatically answer.

                         AUTODIALING STORED NUMBER

  Type:          Configuration

  Format:        AT [cmds] *AUn [cmds]

  Example:       AT *AU4 *CN4,1(303)443-3388<CR>

  Description:   Sets the autodialing function to dial the number stored
                 in memory location n.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Register

  Format:            AT [cmds] %An [cmds]

  Example:           AT%A20<CR>

  Default:           19

  Range:             0-127

  Unit:              ASCII

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

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Register

  Format:            AT [cmds] S64=n [cmds]

  Example:           ATS64=20<CR>

  Range:             0-127

  Unit:              ASCII

  Description:       Sets the character used as the auto-reliable
                     fallback character. S64=0 will disable this
                     function.

                  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-RETRAIN

  Type:          Configuration

  Format:        AT %En

  Example:       AT %E1 *MM12<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:                138

  Range:                  0 - 190

  Unit:                   Bit-mapped

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

      Bit        Value                         Function

       0         0           Not used.

       1         0           Command echo off.

                  1         Command echo on.

       2          0         Result codes enabled.

                 1           Result codes disabled.

       3         0           Numeric result codes.

                  1         Verbose result codes.

       4          1         Not used.

       5          0         Tone dialing selected.

                 1           Pulse dialing selected.

       6         0           Not used.

       7         0           Answer mode selected.

                  1         Originate mode selected.

                          BIT-MAPPED REGISTER S21

  Format                  AT [cmds] S21=n [cmds]

  Example:                ATS21=1<CR>

  Default:                132

  Range:                  0 - 255

  Unit:                   Bit-mapped

  Description:            Controls low DTR action, DCD signal, and the
                          Long Space Disconnect function.

  Note:                   Be aware that the bits are out of order.

      Bit        Value                         Function

      6, 0        00         DSR forced high.

                 01           DSR normal, except forced low on
                              disconnect.
                 10
                              DSR normal.
                 11
                              DSR follows OH.

      5, 1        00         CD forced high.

                 01           CD forced high except during disconnect.

                 10           CD normal.

                 11           CD follows remote RTS signal.

       2         0            CTS normal.

                  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.

                 11           Modem resets on low DTR.

       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=114<CR>

  Default:                  70

  Range:                    0 - 255

  Unit:                     Bit-mapped

  Description:              Controls volume and speaker settings, result
                            codes, and make/break pulse ratio.

       Bit          Value                       Function

       1, 0         00          Lowest volume setting.

                    01          Low volume setting.

                     10        Medium volume setting

                    11          Highest volume setting.

       3, 2         00          Speaker disabled.

                     01        Speaker enabled until carrier signal
                                detected
                    10
                                Speaker enabled.
                    11
                                Speaker enabled following dialing, then
                                disabled after carrier signal detected.

     6, 5 ,4        000         Busy and dialtone detection disabled,
                                result codes 0-4 enabled.
                    001
                                Busy and dialtone detection disabled,
                    010         result codes 0-5, 10 enabled.

                    011         Busy tone detection disabled, dialtone
                                detection enabled, result codes 0-6, 10
                     100       enabled.

                                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         Pulse dialing at 39/61ms at 10pps.

                    1           Pulse dialing at 33/67ms at 10pps.

                          BIT-MAPPED REGISTER S23

  Format               AT [cmds] S23=n [cmds]

  Example:             ATS23=177<CR>

  Default:             1

  Range:               0 - 129

  Unit:                Bit-mapped

  Description:         Grants/denies remote digital loopback and sets
                       guard tone.

     Bit       Value                         Function

      0        0          Remote digital loopback denied.

                1        Remote digital loopback allowed.

      1        0          Not used.

      2        0          Not used.

      3        0          Not used.

      4        0          Not used.

      5        0          Not used.

     7, 6       00       Guard tone disabled.

               01         Guard tone at 500Hz enabled.

               10         Guard tone at 1800Hz enabled.

                          BIT-MAPPED REGISTER S27

  Format                 AT [cmds] S27=n [cmds]

  Example:               ATS27=9<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         DTR dialing enabled.

                1           DTR dialing disabled.

                          BIT-MAPPED REGISTER S29

  Format                   AT [cmds] S29=n [cmds]

  Example:                 ATS29=4<CR>

  Default:                 0

  Range:                   0 - 135

  Unit:                    Bit-mapped

  Description:             Controls command set, option retaining, V.32
                           fast handshaking, and DTE fallback.

      Bit         Value                        Function

       0           0         AT command set enabled.

                  1           AT command set disabled.

       1           0         Modem will not reset on disconnect.

                  1           Modem will reset on disconnect.

       2           0         Normal V.32 handshake sequence.

                  1           Training time is shortened by 2 seconds in
                              V.32 and V.32bis modes.

       3          0           Not used.

       4          0           Not used.

       5          0           Not used.

       6          0           Not used.

       7           0         DTR dialing enabled.

                  1           DTR dialing disabled.

                          BIT-MAPPED REGISTER S32

  Format                  AT [cmds] S32=n [cmds]

  Example:                ATS32=14<CR>

  Default:                6

  Range:                  0 - 15

  Unit:                   Bit-mapped

  Description:            Controls line type, disconnect on loss of
                          current, and leased line backup mode.

      Bit         Value                        Function

       0           0         2-wire leased line.

                  1           4-wire leased line.

      2, 1        00          Do not disconnect on loss of current.

                  01          Disconnect after 8ms if current is lost.

                   11        Disconnect after 90ms if current is lost.

       3           0         Modem will restore leased line connection
                              only when modem receives *LB or *LD.
                  1
                              Modem will restore leased line connection
                              automatically.

                          BIT-MAPPED REGISTER S60

  Format                     AT [cmds] S60=n [cmds]

  Example:                   ATS60=4<CR>

  Default:                   67

  Range:                     0 - 199

  Unit:                      Bit-mapped

  Description:               Controls auto-retrain, MNP, auto-reliable
                             time buffering, RI signal, and extended
                             result codes.

        Bit         Value                       Function

         0          0           Auto-retrain disabled.

                     1         Auto-retrain enabled.

         1          0           MNP disabled.

                     1         MNP enabled.

         2           0         Data is discarded during auto-relaible
                                time.
                    1
                                Data is buffered during auto-relaible
                                time.

       5 - 3        0           Not used.

         6          0           RI signal high during rings, and forced
                                high for duration of call.
                     1
                                RI signal high during rings only.

         7           0         Extended result codes disabled.

                    1           Extended result codes enabled.

                          BIT-MAPPED REGISTER S70

  Format                    AT [cmds] S70=n [cmds]

  Example:                  ATS70=7<CR>

  Default:                  15

  Range:                    0 - 15

  Unit:                     Bit-mapped

  Description:              Controls connect mode and V.42 negotiation
                            mode.

       Bit          Value                       Function

     2, 1, 0        000         Normal mode enabled.

                    001         Direct mode enabled.

                    010         MNP mode only enabled.

                    011         MNP mode with fallback to normal mode
                                enabled.
                    100
                                LAP-M mode only enabled.
                    101
                                LAP-M mode with fallback to normal mode
                    110         enabled.

                     111       LAP-M mode with fallback to MNP enabled.

                                LAP-M mode with fallback to MNP and
                                normal modes enabled.

        3           0           Normal V.42 handshaking enabled.

                     1         Fast V.42 handshaking enabled.

                          BIT-MAPPED REGISTER S72

  Format                     AT [cmds] S72=n [cmds]

  Example:                   ATS72=7<CR>

  Default:                   0

  Range:                     0 - 137

  Unit:                      Bit-mapped

  Description:               Controls serial port lock, CTS signal, and
                             autocallback function.

        Bit          Value                      Function

         0            0         Serial speed locked.

                     1           Serial speed follows connect speed.

       2 - 1         0           Not used.

         3            0         CTS normal.

                     1           CTS follows CD.

       6 - 4         0           Not used.

         7            0         Autocallback disabled.

                     1           Autocallback enabled. The modem, upon
                                 detecting an incoming call, will dial
                                 the default number and connect with it
                                 instead of the incoming call.

                          BIT-MAPPED REGISTER S84

  Format                     AT [cmds] S84=n [cmds]

  Example:                   ATS84=7<CR>

  Default:                   0

  Range:                     0 - 93

  Unit:                      Bit-mapped

  Description:               Controls disconnect during handshaking, V.22
                             fallback, answerback, dial backup trigger,
                             and frame tracking.

        Bit         Value                       Function

         0           0         Disconnect if key is pressed during
                                handshaking.
                    1
                                Do not disconnect if key is pressed
                                during handshaking.

         1          0           Not used.

         2           0         Normal fallback to V.22.

                    1           Fast fallback to V.22.

         3           0         Normal answerback.

                    1           Fast answerback.

         4           0         DTR signal must go from low to high four
                                times for dial backup to occur.
                    1
                                DTR signal must go from low to high once
                                for dial backup to occur.

         5          0           Not used.

         6           0         Frame tracking disabled.

                    1           Frame tracking enabled.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B50 O<CR>

  Default:       35

  Range:         1-255

  Unit:          20ms

  Description:   Sends break to modem.

                               BREAK LENGTH

  Type:          Register

  Format:        AT [cmds] S79=n [cmds]

  Example:       ATS79=20<CR>

  Default:       35

  Range:         0 - 255

  Unit:          20 ms

  Description:   Sets the length of breaks sent from DCE to DTE.

                                   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.

                                   BREAK TYPE

  Type:                   Register

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

  Example:                AT S59=1 <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

  S59=0         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.

  S59=1         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.

  S59=2         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.

  S59=3         Send break to     Send break to   Send break to  Send break to
                remote modem      remote modem    remote modem   DTE
                immediately.      immediately.    immediately.   immediately.

  S59=4         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.

   S59=5       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.

                                 CD SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  Example:       AT &C3 *RS1 *SR1<CR>

  Description:   Configures the behavior of the carrier detect signal.

  Command                                Function

   &C0          CD forced high.

  &C1            CD normal.

  &C2            CD forced high except during disconnect.

  &C3            CD follows remote RTS signal.

                        CHARACTER LENGTH AND PARITY

  Format                AT [cmds] S61? [cmds]

  Example:              ATS61?<CR>

  Default:              Read-only

  Range:                0 - 56

  Unit:                 Bit-mapped

  Description:          Reports current character length and parity.

     Bit        Value                         Meaning

    2 - 0       0          Not used.

      3         0          7 bit character length set.

                 1        8 bit character length set.

     5, 4        00       MARK parity.

                01         No parity.

                10         Odd parity.

                11         Even parity.

                                COMMAND SET

  Type:                Configuration

  Format:              AT [cmds] *NTn [cmds]

  Example:             AT *NT0<CR>

  Description:         Disables the AT command set.

  Note:                To re-enable the command set, power down the modem
                       and then cycle power seven times. The modem must
                       remain powered on each time at least one second
                       but not more than five.

  Command                                   Function

   *NT0               Command set disabled.

  *NT1                 Command set enabled.

                            COMMUNICATIONS MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Example:       AT &M2 H1 DT555-1212<CR>

  Description:   Selects the active communications mode.

  Command                                Function

   &M0          Asynchronous command and data modes.

  &M1            Asynchronous command, synchronous connect mode.

  &M2            DTR dialing enabled, synchronous connect mode.

  &M3            Manual dialing only, synchronous connect mode.

  &M4            V.25bis bisynchronous command, synchronous connect mode.

  &M5            V.25bis SDLC command, synchronous connect mode.

  &M6            V.25bis asynchronous command, synchronous connect mode.

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT *EC0 %C1 *AP0<CR>

  Description:   Selects data compression.

  Command                                Function

  %C0            Data compression disabled.

   %C1          Data compression enabled.

  %C2            Data compression enabled on transmit only.

  %C3            Data compression enabled on receive only.

                                COMPRESSION

  Type:          Register

  Format:        AT S56=n

  Example:       AT *EC0 S56=1 *AP0<CR>

  Description:   Selects data compression.

  Command                                Function

  S56=0          Data compression disabled.

  S56=1          Data compression enabled on transmit only.

  S56=2          Data compression enabled on receive only.

   S56=3        Data compression enabled.

                COMPRESSION AND ERROR CORRECTION - CURRENT

  Type:          Register

  Format:        AT [cmds] S71? [cmds]

  Example:       AT S71?<CR>

  Default:       Read-only

  Description:   Reports current compression and error correction
                 protocols.

     Value                               Meaning

       0         No compression or error correction protocols active.

       1         Negotiation in progress.

       2         MNP2 active.

       3         MNP3 active.

       4         MNP4 active.

       5         MNP5 active.

       6         V.42 active.

       7         V.42bis active.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 DT555-1212<CR>

  Description:   Sets connect mode.

  Command                                Function

  \N0            Normal mode enabled.

  \N1            Direct mode enabled.

  \N2            MNP mode only enabled.

  \N3            MNP mode with fallback to normal mode enabled.

  \N4            LAP-M mode only enabled.

  \N5            LAP-M mode with fallback to normal mode enabled.

  \N6            LAP-M mode with fallback to MNP enabled.

   \N7          LAP-M mode with fallback to MNP and normal modes
                 enabled.

                        CONNECTION SPEED - CURRENT

  Type:          Register

  Format:        AT [cmds] S67? [cmds]

  Example:       AT S67?<CR>

  Default:       Read-only

  Description:   Reports current connection speed.

     Value                               Meaning

       1         300bps current speed.

       3         1200bps current speed.

       4         2400bps current speed.

       5         4800bps current speed.

       6         7200bps current speed.

       7         9600bps uncoded current speed.

       8         9600bps current speed.

       9         12Kbps current speed.

       10        14.4Kbps current speed.

       11        16.8Kbps current speed.

       12        19.2Kbps current speed.

       13        21.6Kbps current speed.

       14        24Kbps current speed.

       15        26.4Kbps current speed.

       16        28.8Kbps current speed.

                       CONNECTION SPEED LOWER LIMIT

  Type:          Configuration

  Format:        AT [cmds] %Ln [cmds]

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

  Description:   Sets slowest allowed connection speed.

  Command                                Function

   %L0          No minimum speed.

  %L2            Select 1200bps minimum speed.

  %L3            Select 2400bps minimum speed.

  %L4            Select 4800bps minimum speed.

  %L5            Select 9600bps uncoded minimum speed.

  %L6            Select 9600bps minimum speed.

  %L7            Select 7200bps minimum speed.

  %L8            Select 12Kbps minimum speed.

  %L9            Select 14.4Kbps minimum speed.

  %L11           Select 16.8Kbps minimum speed.

  %L12           Select 19.2Kbps minimum speed.

  %L13           Select 21.6Kbps minimum speed.

  %L14           Select 24Kbps minimum speed.

  %L15           Select 26.4Kbps minimum speed.

  %L16           Select 28.8Kbps minimum speed.

                       CONNECTION SPEED LOWER LIMIT

  Type:          Configuration

  Format:        AT [cmds] S81=n [cmds]

  Example:       AT %L3 S81=14 \J0<CR>

  Description:   Sets slowest allowed connection speed.

    Command                              Function

     S81=0       No minimum speed.

     S81=3       Select 1200bps minimum speed.

     S81=4       Select 2400bps minimum speed.

     S81=5       Select 4800bps minimum speed.

     S81=6       Select 7200bps minimum speed.

     S81=7       Select 9600bps uncoded minimum speed.

     S81=8       Select 9600bps minimum speed.

     S81=9       Select 12Kbps minimum speed.

     S81=10      Select 14.4Kbps minimum speed.

     S81=11      Select 16.8Kbps minimum speed.

     S81=12      Select 19.2Kbps minimum speed.

     S81=13      Select 21.6Kbps minimum speed.

     S81=14      Select 24Kbps minimum speed.

     S81=15      Select 26.4Kbps minimum speed.

     S81=16      Select 28.8Kbps minimum speed.

                       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

  %B0            Follow serial port speed.

  %B1            Select 300bps maximum speed.

  %B2            Select 1200bps maximum speed.

  %B3            Select 2400bps maximum speed.

  %B4            Select 4800bps maximum speed.

  %B5            Select 9600bps uncoded maximum speed.

  %B6            Select 9600bps maximum speed.

  %B7            Select 7200bps maximum speed.

  %B8            Select 12Kbps maximum speed.

   %B9          Select 14.4Kbps maximum speed.

  %B11           Select 16.8Kbps maximum speed.

  %B12           Select 19.2Kbps maximum speed.

  %B13           Select 21.6Kbps maximum speed.

  %B14           Select 24Kbps maximum speed.

  %B15           Select 26.4Kbps maximum speed.

  %B16           Select 28.8Kbps maximum speed.

                       CONNECTION SPEED UPPER LIMIT

  Type:          Configuration

  Format:        AT [cmds] S69=n [cmds]

  Example:       AT %L3 S69=14 \J0<CR>

  Description:   Sets fastest allowed connection speed.

  Command                                Function

  S69=0          Follow serial port speed.

  S69=1          Select 300bps maximum speed.

  S69=3          Select 1200bps maximum speed.

  S69=4          Select 2400bps maximum speed.

  S69=5          Select 4800bps maximum speed.

  S69=6          Select 7200bps maximum speed.

  S69=7          Select 9600bps uncoded maximum speed.

  S69=8          Select 9600bps maximum speed.

  S69=9          Select 12Kbps maximum speed.

   S69=10       Select 14.4Kbps maximum speed.

  S69=11         Select 16.8Kbps maximum speed.

  S69=12         Select 19.2Kbps maximum speed.

  S69=13         Select 21.6Kbps maximum speed.

  S69=14         Select 24Kbps maximum speed.

  S69=15         Select 26.4Kbps maximum speed.

  S69=16         Select 28.8Kbps maximum speed.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Rn [cmds]

  Example:       AT &R0<CR>

  Description:   Selects the function of the CTS signal.

    Command                              Function

  &R0            CTS normal.

   &R1          CTS forced high.

  &R2            CTS follows CD.

  &R9            CTS follows RTS.

                          DISCONNECT BUFFER DELAY

  Type:                Configuration

  Format:              AT [cmds] %Dn [cmds]

  Example:             AT %D0<CR>

  Default:             0

  Range:               0-255

  Unit:                1 second

  Description:         Configures how long the modem will wait to
                       disconnect if there is data in the transmit or
                       receive buffers.

                          DISCONNECT BUFFER DELAY

  Type:                Register

  Format:              AT [cmds] S62=n [cmds]

  Example:             AT S62=0<CR>

  Default:             0

  Range:               0-255

  Unit:                1 second

  Description:         Configures how long the modem will wait to
                       disconnect if there is data in the transmit or
                       receive buffers.

                       DISCONNECT ON LOSS OF CURRENT

  Type:          Configuration

  Format:        AT [cmds] *LCn [cmds]

  Example:       AT*LC0<CR>

  Description:   Causes the modem to disconnect if the telephone lines
                 current drops.

  Command                                Function

  *LC0           Do not disconnect on loss of current.

  *LC1           Disconnect after 8ms if current is lost.

   *LC2         Disconnect after 90ms if current is lost.

                             DISCONNECT RESET

  Type:          Configuration

  Format:        AT [cmds] *ROn [cmds]

  Example:       AT*RO0<CR>

  Description:   Selects whether the modem will reset on disconnect.

  Command                                Function

   *RO0         Modem will not reset on disconnect.

  *RO1           Modem will reset on disconnect.

                          DISPLAY STORED NUMBERS

  Type:          Immediate

  Format:        AT [cmds] *ND [cmds]

  Example:       AT*CN3,555-1212 *ND<CR>

  Description:   Displays all stored phone numbers.

                                DSR SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Example:       AT &S0<CR>

  Description:   Selects the function of the DSR signal.

  Command                                Function

   &S0          DSR forced high.

  &S1            DSR normal.

  &S2            DSR normal, except forced low on disconnect.

  &S3            DSR follows OH.

                           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.

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] S82=n [cmds]

  Example:       AT %L3 S82=4 \J0<CR>

  Description:   Selects extended result codes.

  Command                                Function

   S82=0        Display DTE rate; extended result codes disabled.

  S82=4          Display DCE rate; extended result codes enabled.

  S82=8          Display DCE rate; extended result codes disabled.

                             FACTORY DEFAULTS

  Type:          Immediate

  Format:        AT &Fn

  Example:       AT &F8<CR>

  Default:       1

  Range:         1-9

  Description:   Loads factory defaults set n.

                               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.

                FLOW CONTROL CHARACTER - XOFF FROM TERMINAL

  Type:          Register

  Format:        AT [cmds] S45=n [cmds]

  Example:       ATS45=22<CR>

  Default:       19

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character the terminal sends to represent XOFF.

                FLOW CONTROL CHARACTER - XON FROM TERMINAL

  Type:          Register

  Format:        AT [cmds] S44=n [cmds]

  Example:       ATS44=20<CR>

  Default:       17

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character the terminal sends to represent XON.

                 FLOW CONTROL CHARACTER - XOFF TO TERMINAL

  Type:          Register

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

  Example:       ATS50=23<CR>

  Default:       19

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character the modem sends to represent XOFF.

                 FLOW CONTROL CHARACTER - XON TO TERMINAL

  Type:          Register

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

  Example:       ATS49=21<CR>

  Default:       17

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character the modem sends to represent XON.

                             FLOW CONTROL MODE

  Format              AT [cmds] S54=n [cmds]

  Example:            ATS54=35<CR>

  Default:            33

  Range:              0 - 123

  Unit:               Bit-mapped

  Description:        Controls flow control type and pass-through.

     Bit       Value                         Function

     1, 0      00        Flow control disabled.

                01      Bidirectional XON/XOFF flow control enabled.

               10        CTS flow control by DCE enabled.

               11        Bidirectional CTS/RTS flow control enabled.

      2        0         Not used.

      3         0       Flow control disabled.

               1         Flow control enabled.

      4         0       XON/XOFF signals trapped by local modem.

               1         XON/XOFF passed through local modem.

     6, 5      00        Flow control by DCE disabled.

                01      XON/XOFF flow control by DCE enabled.

               10        RTS flow control by DCE enabled.

               11        RTS flow control by DCE 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.

  \Q7            RTS flow control by DCE enabled.

                               FORCE RETRAIN

  Type:          Immediate

  Format:        AT [cmds] *RRn [cmds]

  Example:       AT *RR14 O<CR>

  Description:   Forces the modem to attempt to retrain to the selected
                 speed.

    Command                              Function

      *RR0       Attempt 2400bps speed.

      *RR1       Attempt 4800bps speed.

      *RR2       Attempt 7200bps speed.

      *RR3       Attempt 9600bps speed.

      *RR4       Attempt 12Kbps speed.

      *RR5       Attempt 14.4Kbps speed.

      *RR6       Attempt 16.8Kbps speed.

      *RR7       Attempt 19.2Kbps speed.

      *RR8       Attempt 21.6Kbps speed.

      *RR9       Attempt 24Kbps speed.

     *RR10       Attempt 26.4Kbps speed.

     *RR11       Attempt 28.8Kbps speed.

                               HANG UP MODE

  Type:          Configuration

  Format:        AT [cmds] Hn [cmds]

  Example:       AT H3 O<CR>

  Description:   Selects how the modem will hang up.

  Command                                Function

   H2           Set hang up mode to normal on next ATH command.

  H3             Set hang up mode to fast on next ATH command.

                               HELP SCREENS

  Type:                 Immediate

  Format:               AT $H=xxxx

  Example:              AT $H=MNP<CR>

  Description:          Shows modem help screens. If a string is included
                        as shown in the example, the modem will perform a
                        search for the string; otherwise, the whole help
                        section will be displayed.

                             INACTIVITY TIMER

  Type:             Register

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<CR>

  Default:          0

  Range:            0-255

  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] S58=n [cmds]

  Example:          AT S58=20<CR>

  Default:          0

  Range:            0-255

  Unit:             1 minute

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

                         LEASED LINE BACKUP NUMBER

  Type:            Register

  Format:          AT [cmds] S35=n [cmds]

  Example:         AT S35=3<CR>

  Description:     Sets the memory location the modem will dial for DTR
                   dialing and leased-line backup.

                     LEASED LINE BACKUP RECOVERY DELAY

  Type:          Register

  Format:        AT [cmds] S28=n [cmds]

  Example:       ATS28=5<CR>

  Default:       15

  Range:         0-255

  Unit:          1 minute

  Description:   After leased line failure, modem attempts to reconnect
                 after specified delay.

                   LEASED LINE BACKUP - RESTORAL OPTIONS

  Type:          Configuration

  Format:        AT [cmds] *DBn [cmds]

  Example:       AT *DB0 D555-1212<CR>

  Description:   Selects what will initiate the restoral of a leased line
                 connection.

  Command                                Function

   *DB0         Modem will restore connection only when modem receives
                 *LB or *LD.

  *DB1           Modem will restore connection automatically.

                       LEASED LINE BACKUP - RESTORE

  Type:                Configuration

  Format:              AT [cmds] *LB [cmds]

  Example:             AT *OR1 *LB <CR>

  Description:         Commands the modem to attempt to restore the
                       leased line connection, or to wait for a leased
                       line call if in answer-only mode.

                   LEASED LINE BACKUP - RESTORE MANUALLY

  Type:            Configuration

  Format:          AT [cmds] *LD [cmds]

  Example:         AT *OR0 *LD <CR>

  Description:     Commands the modem to dial the default number to
                   restore the leased line connection.

                      LEASED LINE TRANSMISSION LEVEL

  Type:          Configuration

  Format:        AT [cmds] *TLn [cmds]

  Example:       AT *TL15<CR>

  Default:       0

  Range:         0 - 30

  Unit:          -1 dBm

  Description:   Sets the signal level for transmission when in leased
                 line mode.

                      LEASED LINE TRANSMISSION LEVEL

  Type:          Register

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

  Example:       AT S52=15<CR>

  Default:       0

  Range:         0 - 30

  Unit:          -1 dBm

  Description:   Sets the signal level for transmission when in leased
                 line mode.

                                 LINE TYPE

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Example:       AT &L2 H1 DT555-1212<CR>

  Description:   Selects line type.

  Command                                Function

   &L0          Switched line.

  &L1            2-wire leased line.

  &L2            4-wire leased line.

                 LOCAL SERIAL PORT SPEED CHANGE ON PIN 23

  Type:                Configuration

  Format:              AT [cmds] *FBn [cmds]

  Example:             AT *FB1<CR>

  Description:         Selects whether a voltage transition on pin 23
                       will cause the modem to change the serial port
                       speed.

  Command                                   Function

   *FB0               Pin 23 transition ignored.

  *FB1                 Pin 23 negative causes modem to increase serial
                       port speed; pin 23 positive causes modem to
                       decrease serial port speed.

                     LOCAL SERIAL PORT SPEED - CURRENT

  Type:          Configuration

  Format:        AT [cmds] S80=n [cmds]

  Example:       AT %L3 S80=14 \J0<CR>

  Description:   Reports the current serial port speed.

  Command                                Function

       1         300bps current speed.

       2         600bps current speed.

       3         1200bps current speed.

       4         2400bps current speed.

       5         4800bps current speed.

       6         7200bps current speed.

       7         9600bps current speed.

       8         12Kbps current speed.

       9         14.4Kbps current speed.

       10        16.8Kbps current speed.

       11        19.2Kbps current speed.

       12        21.6Kbps current speed.

       13        24Kbps current speed.

       14        26.4Kbps current speed.

       15        28.8Kbps current speed.

       16        38.4Kbps current speed.

       17        57.6Kbps current speed.

       18        115.2Kbps current speed.

                             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.

                          LOOPBACK TEST ON PIN 18

  Type:             Configuration

  Format:           AT [cmds] *LAn [cmds]

  Example:          AT*LA0<CR>

  Description:      Controls whether the modem will perform a local
                    analog loopback test when pin 18 goes high.

  Command                                 Function

   *LA0            Pin 18 has no function.

  *LA1              Pin 18 going high causes the modem to perform local
                    analog loopback test.

                          LOOPBACK TEST ON PIN 21

  Type:             Configuration

  Format:           AT [cmds] *RDn [cmds]

  Example:          AT*RD0<CR>

  Description:      Controls whether the modem will perform a remote
                    digital loopback test when pin 21 goes high.

  Command                                 Function

   *RD0            Pin 21 has no function.

  *RD1              Pin 21 going high causes the modem to perform remote
                    digital loopback test.

                    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.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Register

  Format:        AT [cmds] S63=n [cmds]

  Example:       AT S63=3 %C1<CR>

  Description:   Sets the maximum transmittable block size.

  Command                                Function

  S63=0          MNP block size is 64 characters.

  S63=1          MNP block size is 128 characters.

  S63=2          MNP block size is 192 characters.

   S63=3        MNP block size is 256 characters.

                              PROTOCOL/SPEED

  Type:          Configuration

  Format:        AT [cmds] *MMn [cmds]

  Example:       AT %E1 *MM12<CR>

  Description:   Selects the current protocol.

    Command                              Function

      *MM0       Selects all protocols.

      *MM1       Selects V.21 only.

      *MM2       Selects Bell 103 only.

      *MM3       Selects Bell 212 only.

      *MM5       Selects V.22bis only.

      *MM6       Selects V.27bis only.

      *MM8       Selects V.29 only.

     *MM10       Selects V.33 only.

     *MM11       Selects V.32bis only.

     *MM12       Selects V.34 only.

                              PROTOCOL/SPEED

  Type:          Configuration

  Format:        AT [cmds] S88=n [cmds]

  Example:       AT %E1 S88=12<CR>

  Description:   Selects the current protocol.

    Command                              Function

     S88=0       Selects all protocols.

     S88=1       Selects V.21 only.

     S88=2       Selects Bell 103 only.

     S88=3       Selects Bell 212 only.

     S88=5       Selects V.22bis only.

     S88=6       Selects V.27bis only.

     S88=8       Selects V.29 only.

     S88=10      Selects V.33 only.

     S88=11      Selects V.32bis only.

     S88=12      Selects V.34 only.

                         PROTOCOL/SPEED - CURRENT

  Type:          Configuration

  Format:        AT [cmds] S91? [cmds]

  Example:       AT %E1 S91?<CR>

  Description:   Reports the current protocol.

     Value                               Meaning

       0         Modem will select protocol automatically.

       1         V.21 only selected.

       2         Bell 103 only selected.

       3         Bell 212 only selected.

       5         V.22bis only selected.

       6         V.27bis only selected.

       8         V.29 only selected.

       10        V.33 only selected.

       11        V.32bis only selected.

       12        V.34 only selected.

                           REMOTE CONFIGURATION

  Type:               Configuration

  Format:             AT [cmds] %T=n [cmds]

                      AT [cmds] D<#>%Tn [cmds]

  Example:            AT &V2 %T=102475

                      AT D555-1212%T102475<CR>

  Description:        Initiates a remote configuration session. This
                      command may follow a dial command, omitting the
                      equal sign, to initiate remote configuration
                      immediately on connection. %T with no parameter
                      will quit the current session.

                       REMOTE CONFIGURATION PASSWORD

  Type:                Configuration

  Format:              AT [cmds] %P=nnnn [cmds]

  Example:             AT %P=102475 D555-1212<CR>

  Default:             N/A

  Range:               0-99999999, D, <none>

  Description:         Sets the security code for remote configuration
                       sessions. If nnnn is omitted, the code will be
                       cleared; if a D is given, remote configuration is
                       disabled.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Example:       AT I3 &V1 %V<CR>

  Description:   Displays modem properties.

    Command                              Function

       I0        Reports modem model and speed.

       I1        Reports checksum number.

       I3        Reports firmware version.

       I4        Reports feature code.

       I5        Reports reason for last disconnect.

               REPORT INFORMATION AND CONFIGURATION PROFILE

  Type:          Immediate

  Format:        AT [cmds] &Vn [cmds]

  Example:       AT I3 &V1 %V<CR>

  Description:   Reports configuration profiles and other information.

    Command                              Function

      &V0        Report configuration profiles.

      &V1        Report connection status and internal modem information.

      &V2        Report active configuration profile.

                          REPORT PRODUCT VERSION

  Type:          Immediate

  Format:        AT [cmds] %V [cmds]

  Example:       AT I3 &V1 %V<CR>

  Description:   Reports product version.

                           REPORT SERIAL NUMBER

  Type:          Immediate

  Format:        AT [cmds] $V [cmds]

  Example:       AT I3 &V1 $V<CR>

  Description:   Reports product serial number.

                             RESULT CODE MODE

  Type:          Configuration

  Format:        AT [cmds] *RCn [cmds]

  Example:       AT *RC0<CR>

  Description:   Selects normal or Motorola result code numbering.

  Command                                Function

   *RC0         Result code 15 is CONNECT 4800 and code 18 is CONNECT
                 9600 (standard).

  *RC1           Result code 11 is CONNECT 4800 and code 12 is CONNECT
                 9600 (Motorola).

                             RESULT CODE MODE

  Type:          Register

  Format:        AT [cmds] S57=n [cmds]

  Example:       AT S57=0<CR>

  Description:   Selects normal or Motorola result code numbering.

  Command                                Function

   S57=0        Result code 15 is CONNECT 4800 and code 18 is CONNECT
                 9600 (standard).

  S57=1          Result code 11 is CONNECT 4800 and code 12 is CONNECT
                 9600 (Motorola).

                            RETRAIN SENSITIVITY

  Type:                Configuration

  Format:              AT [cmds] %Rn [cmds]

  Example:             AT &C3 %R1<CR>

  Description:         Sets how poor line conditions must be before the
                       modem will initiate a retrain.

  Command                                   Function

   %R0                Modem will not initiate retrain.

  %R1                  Modem will initiate retrain when the Bit Error
                       Rate exceeds 10-5 for eight seconds, or for one
                       second in V.22bis mode.

  %R2                  Modem will initiate retrain when the Bit Error
                       Rate exceeds 10-4 for eight seconds, or for one
                       second in V.22bis mode.

  %R3                  Modem will initiate retrain when the Bit Error
                       Rate exceeds 10-3 for eight seconds, or for one
                       second in V.22bis mode.

                            RETRAIN SENSITIVITY

  Type:                 Register

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

  Example:              AT &C3 S53=1<CR>

  Description:          Sets how poor line conditions must be before the
                        modem will initiate a retrain.

  Command                                   Function

   S53=0               Modem will not initiate retrain.

  S53=4                 Modem will initiate retrain when the Bit Error
                        Rate exceeds 10-5 for eight seconds, or for one
                        second in V.22bis mode.

  S53=8                 Modem will initiate retrain when the Bit Error
                        Rate exceeds 10-4 for eight seconds, or for one
                        second in V.22bis mode.

  S53=12                Modem will initiate retrain when the Bit Error
                        Rate exceeds 10-3 for eight seconds, or for one
                        second in V.22bis 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.

                       SECURITY - AUTOCALLBACK DELAY

  Type:                Register

  Format:              AT [cmds] S78=n [cmds]

  Example:             AT S78=10<CR>

  Default:             30

  Range:               0-255

  Unit:                1 second

  Description:         Configures how long the modem will wait to execute
                       the autocallback sequence after an incoming call
                       is detected.

                         SECURITY - CALLBACK DELAY

  Type:               Register

  Format:             AT [cmds] S74=n [cmds]

  Example:            AT S74=30<CR>

  Default:            15

  Range:              0-255

  Unit:               1 second

  Description:        Configures how long the modem will wait to execute
                      a callback sequence after the user has
                      disconnected.

                        SECURITY - CALLBACK NUMBER

  Type:          Configuration

  Format:        AT [cmds] $Cn=<#> [cmds]

  Example:       AT $L0=3 $C0=1(303)443-3388<CR>

  Description:   Sets the callback number for user number n.

                         SECURITY - CALLBACK RETRY

  Type:            Register

  Format:          AT [cmds] S75=n [cmds]

  Example:         AT S75=5<CR>

  Default:         Unidentified

  Range:           0-255

  Unit:            1 redial

  Description:     Sets how many times the modem will attempt to execute
                   a callback if the first call fails.

                      SECURITY - CALLBACK RETRY DELAY

  Type:              Register

  Format:            AT [cmds] S76=n [cmds]

  Example:           AT S76=60<CR>

  Default:           15

  Range:             0-255

  Unit:              1 second

  Description:       Configures how long the modem will wait to execute
                     another callback sequence after one has failed.

                              SECURITY CHECK

  Type:          Immediate

  Format:        AT [cmds] $D? [cmds]

                 AT [cmds] $E? [cmds]

  Example:       AT $DR $D?<CR>

  Description:   Reports whether security is enabled.

                          SECURITY - DELETE USER

  Type:          Configuration

  Format:        AT [cmds] $Rn [cmds]

  Example:       AT $R3<CR>

  Description:   Deletes the user number n. User IDs 0 and 1 cannot be
                 deleted.

                             SECURITY DISABLE

  Type:          Immediate

  Format:        AT [cmds] $D=xxxx

  Example:       AT $D=MicroHouse<CR>

  Description:   Disables security. A password must be specified.

                      SECURITY ENABLE - HIGH SECURITY

  Type:          Immediate

  Format:        AT [cmds] $EH=xxxx

  Example:       AT $EH=SuperSecret<CR>

  Description:   Enables security. The superuser password must be
                 specified.

                      SECURITY ENABLE - LOW SECURITY

  Type:          Immediate

  Format:        AT [cmds] $E=xxxx

  Example:       AT $E=MicroHouse<CR>

  Description:   Enables security. A password must be specified.

                 SECURITY - FAILED LOGIN ATTEMPT COUNTERS

  Type:               Configuration/Immediate

  Format:             AT [cmds] $Mn [cmds]

  Example:            AT $M $M*<CR>

  Description:        Displays or clears the counters for failed login
                      attempts. If a number is specified, the counter
                      will be reset for that user. If an * follows, all
                      counters will be cleared. If no character follows,
                      the counters will be displayed.

                  SECURITY - FAILED LOGIN ATTEMPT MAXIMUM

  Type:            Register

  Format:          AT [cmds] S77=n [cmds]

  Example:         AT S77=3<CR>

  Default:         Unidentified

  Range:           0-255

  Unit:            1 attempt

  Description:     Sets the maximum number of failed logins the modem
                   will accept until it disconnects.

                     SECURITY - HIGH SECURITY PASSWORD

  Type:             Configuration

  Format:           AT [cmds] $Pn=xxxx$xxxx

  Example:          AT $P0=SuperSecret$SuperSecret<CR>

  Description:      Sets the password for user number n to xxxx. User
                    number 0 is the superuser. The password must be
                    between 4 and 34 characters inclusive. The $
                    character may not be used.

                      SECURITY - HIGH SECURITY RESET

  Type:          Configuration

  Format:        AT [cmds] $F=xxxx$xxxx

  Example:       AT $F=SuperSecret$SuperSecret<CR>

  Description:   Resets the high security options to their factory
                 defaults.

                              SECURITY LEVEL

  Type:               Configuration

  Format:             AT [cmds] $Lm=n [cmds]

  Example:            AT $L0=3 $C0=1(303)443-3388<CR>

  Description:        Sets the security level for user number m.

      Command                              Function

       $Lm=1          Modem prompts for a user ID and password on
                      connection.

       $Lm=2          Modem prompts for a user ID and password on
                      connection, then modem begins callback sequence.

       $Lm=3          Modem prompts for a user ID and password on
                      connection, then modem begins callback sequence.
                      When modem reconnects, it prompts for a user ID and
                      password again.

                              SECURITY LOGIN

  Type:          Immediate

  Format:        AT [cmds] $n=xxxx [cmds]

  Example:       AT $1=MicroHouse<CR>

  Description:   Logs into modem, from the local machine or remotely.

                              SECURITY LOGOUT

  Type:          Immediate

  Format:        AT [cmds] $$ [cmds]

  Example:       AT $$<CR>

  Description:   Logs out from the modem.

                     SECURITY - LOW SECURITY PASSWORD

  Type:          Configuration

  Format:        AT [cmds] $S=xxxx

  Example:       AT $S=MicroHouse<CR>

  Description:   Sets an empty login password to xxxx.

                  SECURITY - LOW SECURITY PASSWORD CHANGE

  Type:             Configuration

  Format:           AT [cmds] $C=xxxx,yyyy

  Example:          AT $CMicroHouse=Fubar<CR>

  Description:      Changes the password xxxx to yyyy. If a - is given
                    for yyyy, the password will be deleted.

                       SECURITY - LOW SECURITY RESET

  Type:          Configuration

  Format:        AT [cmds] $DR [cmds]

  Example:       AT $DR $D?<CR>

  Description:   Resets the low security options to their factory
                 defaults.

                             SECURITY OPTIONS

  Type:            Configuration

  Format:          AT [cmds] $Wm=n [cmds]

  Example:         AT $W0=3 $C0=1(303)443-3388<CR>

  Description:     Controls what features a remote user has access to.

     Command                              Function

       $W0         Remote users can access no extra features.

       $W1         Remote users can change their passwords and callback
                   numbers.

       $W2         Remote users can change their passwords and callback
                   numbers and login as the superuser.

                         SECURITY - PASSWORD TIME

  Type:          Register

  Format:        AT [cmds] S73=n [cmds]

  Example:       AT S73=10<CR>

  Default:       Unidentified

  Range:         0-255

  Unit:          1 second

  Description:   Configures how long the modem will wait for a password
                 when in secure mode.

                    SECURITY - REPORT SUPERUSER STATUS

  Type:          Immediate

  Format:        AT [cmds] $Sn? [cmds]

  Example:       AT $S3?<CR>

  Description:   Reports whether user n has superuser status.

                      SECURITY - REPORT USER SETTINGS

  Type:          Immediate

  Format:        AT [cmds] $In [cmds]

  Example:       AT $I3<CR>

  Description:   Reports security level and callback number for user n.

                     SECURITY - REPORT USERS SETTINGS

  Type:            Immediate

  Format:          AT [cmds] $IBn [cmds]

  Example:         AT $IB11<CR>

  Description:     Reports security level and callback number for the ten
                   users beginning at user number n.

                         SECURITY - SUPERUSER MODE

  Type:          Immediate

  Format:        AT [cmds] $S=xxxx [cmds]

  Example:       AT $S=SuperSecret<CR>

  Description:   Attempts to enter superuser mode.

                            STATUS REGISTER BIT

  Type:          Configuration

  Format:        Write: AT [cmds] Sn.m=0 or 1 [cmds]

                 Read: AT [cmds] Sn.m=? [cmds]

  Example:       AT S40.4=1 S51.3?<CR>

  Description:   Sets/clears or reads bit m of register n.

                        STATUS REGISTER HEXADECIMAL

  Type:           Configuration

  Format:         Write: AT [cmds] Sn^=hh [cmds]

                  Read: AT [cmds] Sn?^ [cmds]

  Example:        AT S99^=3F S99?^<CR>

  Description:    Sets register n to hexadecimal number hh or displays
                  register n in hexadecimal.

                        STORE PHONE NUMBER IN NVRAM

  Type:          Configuration

  Format:        AT [cmds] *CNn,<#>

  Example:       AT *AU4 *CN4,1(303)443-3388<CR>

  Description:   Stores a phone number in the modems memory.

                     SWITCHED LINE TRANSMISSION LEVEL

  Type:             Configuration

  Format:           AT [cmds] %Zn [cmds]

  Example:          AT %R1 %Z1<CR>

  Description:      Sets the signal level for transmission.

  Command                                 Function

   %Z0             Permissive transmission level (level fixed at -9dBm.)

  %Z1               Programmable transmission level (level controlled by
                    exterior resistor, or -12dBm if absent.)

                     SWITCHED LINE TRANSMISSION LEVEL

  Type:          Configuration

  Format:        AT [cmds] *TDn [cmds]

  Example:       AT *TD15<CR>

  Default:       9

  Range:         9 - 30

  Unit:          -1 dBm

  Description:   Sets the signal level for transmission when in switched
                 line mode.

                              TALK/DATA MODE

  Type:          Immediate

  Format:        AT [cmds] *DAn [cmds]

  Example:       AT *DA1 <CR>

  Description:   Selects talk or data mode.

  Command                                Function

   *DA0         Talk mode enabled.

  *DA1           Data mode enabled.

              TEST MODE - BIDIRECTIONAL ANALOG LOOPBACK TEST

  Type:          Configuration

  Format:        AT [cmds] *ANn [cmds]

  Example:       AT *AN1<CR>

  Description:   Controls the bidirectional local analog loopback test
                 mode.

  Command                                Function

   *AN0         End loopback test.

  *AN1           Begin loopback test.

              TEST MODE - BIDIRECTIONAL DIGITAL LOOPBACK TEST

  Type:          Configuration

  Format:        AT [cmds] *DGn [cmds]

  Example:       AT *DG1<CR>

  Description:   Controls the bidirectional local digital loopback test
                 mode.

  Command                                Function

   *DG0         End loopback test.

  *DG1           Begin loopback test.

                                TEST MODES

  Format                  AT [cmds] S34=n [cmds]

  Example:                ATS34=4<CR>

  Default:                0

  Range:                  0 - 15

  Unit:                   Bit-mapped

  Description:            Initiates and controls loopback tests.

      Bit        Value                         Function

       0          0         End bidirectional local analog loopback
                             test.
                 1
                             Begin bidirectional local analog loopback
                             test.

       1          0         End bidirectional local digital loopback
                             test.
                 1
                             Begin bidirectional local digital loopback
                             test.

       2          0         Pin 18 has no function.

                 1           Pin 18 going high causes the modem to
                             perform local analog loopback test.

       3          0         Pin 21 has no function.

                 1           Pin 21 going high causes the modem to
                             perform remote digital loopback test.

                                TEST STATUS

  Format               AT [cmds] S16=n [cmds]

  Example:             ATS16=32<CR>

  Default:             Read-only

  Range:               0 - 255

  Unit:                Bit-mapped

  Description:         Contains status of loopback tests.

     Bit        Value                        Function

      0            0      Local analog loopback test not in progress.

                  1       Local analog loopback test in progress.

      1            0      Remote analog loopback test not in progress.

                  1       Remote analog loopback test in progress.

      2            0      Local digital loopback test not in progress.

                  1       Local digital loopback test in progress.

      3            0      Remotely requested remote digital loopback test
                          not in progress.
                  1
                          Remotely requested remote digital loopback test
                          in progress.

      4            0      Locally requested remote digital loopback test
                          not in progress.
                  1
                          Locally requested remote digital loopback test
                          in progress.

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

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

      7            0      Remote analog loopback with local self-test not
                          in progress.
                  1
                          Remote analog loopback with local self-test in
                          progress.

                              V.25bis OPTIONS

  Format                  AT [cmds] S30=n [cmds]

  Example:                ATS30=4<CR>

  Default:                0

  Range:                  0 - 230

  Unit:                   Bit-mapped

  Description:            Controls V.25bis character set, VAL response,
                          NRZ/NRZI, and communications mode.

      Bit         Value                        Function

       0          0           Not used.

       1           0         Use ASCII character set.

                  1           Use EBCDIC character set.

       2           0         VAL response enabled.

                  1           VAL response disabled.

       3          0           Not used.

       4          0           Not used.

       5           0         Use NRZ mode.

                  1           Use NRZI mode.

      7, 6         00        V.25bis command set disabled.

                  01          V.25bis bisynchronous command, synchronous
                              connect mode.
                  10
                              V.25bis SDLC command, synchronous connect
                  11          mode.

                              V.25bis asynchronous command, synchronous
                              connect mode.

                          V.32 HANDSHAKE OPTIONS

  Type:          Configuration

  Format:        AT [cmds] *FTn [cmds]

  Example:       AT *FT0<CR>

  Description:   Shortens V.32 and V.32bis handshake time.

  Command                                Function

   *FT0         Normal handshake sequence.

  *FT1           Training time is shortened by 2 seconds in V.32 and
                 V.32bis modes.

                               V.34 OPTIONS

  Format:               AT [cmds] S95=n [cmds]

  Example:              ATS95=240<CR>

  Default:              240

  Range:                0 - 240

  Unit:                 Bit-mapped

  Description:          Controls non-linear coding, pre-emphasis,
                        shaping, and pre-coding.

      Bit       Value                         Function

     3 - 1      0           Not used.

       4        0           Non-linear coding disabled.

                 1         Non-linear coding enabled.

       5        0           Pre-emphasis disabled.

                 1         Pre-emphasis enabled.

       6        0           Constellation shaping disabled.

                 1         Constellation shaping enabled.

       7        0           Pre-coding disabled.

                 1         Pre-coding enabled.

                               V.34 OPTIONS

  Format:               AT [cmds] S96=n [cmds]

  Example:              ATS96=160<CR>

  Default:              160

  Range:                0 - 160

  Unit:                 Bit-mapped

  Description:          Controls TX level deviation and asymmetric bit
                        rates.

     Bit        Value                         Function

    4 - 0       0          Not used.

      5         0          Asymmetric bit rates disabled.

                 1        Asymmetric bit rates enabled.

      6         0          Not used.

      7         0          TX level deviation disabled.

                 1        TX level deviation enabled.

                         V.34 RETRAIN SENSITIVITY

  Type:              Configuration

  Format:            AT [cmds] *THn [cmds]

  Example:           AT *MM12 *TH1<CR>

  Description:       Sets how poor line conditions must be before the
                     modem will initiate a retrain when in V.34 mode.

  Command                                  Function

   *TH0             Modem will initiate retrain when the Bit Error Rate
                     exceeds 10-6.

  *TH1               Modem will initiate retrain when the Bit Error Rate
                     exceeds 10-4.

  *TH2               Modem will initiate retrain when the Bit Error Rate
                     exceeds 10-2.

                           V.34 SPLIT BAUD MODE

  Type:          Configuration

  Format:        AT [cmds] *ASn [cmds]

  Example:       AT *AS1 <CR>

  Description:   Controls V.34 split baud mode.

    Command                              Function

      *AS0       V.34 split baud mode disabled.

      *AS1       V.34 split baud mode enabled.

                           V.42 NEGOTIATION MODE

  Type:          Configuration

  Format:        AT [cmds] \Mn [cmds]

  Example:       AT \M0 H1 DT555-1212<CR>

  Description:   Selects how the modem negotiates V.42 modulation during
                 handshaking.

  Command                                Function

  \M0            Normal handshaking enabled.

   \M1          Fast handshaking enabled.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X7 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.

                      Proprietary V.25bis Command Set

                                CONNECTION

  Type:          Response

  Format:        CNX@nnnnnBPS

  Description:   A connection has been successfully established at the
                 rate specified.

                      DISPLAY CURRENT COMMAND STATUS

  Type:                 Immediate

  Format:               RLOnnn;xx

  Example:              RLO112;2<CR>

  Description:          Displays current setting of modem commands. If no
                        parameters are given, all commands will be
                        displayed. Otherwise, xx addresses will be
                        displayed beginning at nnn.

                          DISPLAY LINKED NUMBERS

  Type:          Immediate

  Format:        RLL

  Example:       RLL<CR>

  Description:   Requests the modem to return the list of linked stored
                 numbers.

                          DISPLAY STORED NUMBERS

  Type:          Immediate

  Format:        RLN

  Example:       RLN<CR>

  Description:   Requests the modem to return the list of stored numbers.

                                  INVALID

  Type:            Response

  Format:          INVxx

  Example:         INVCU

  Description:     The modem was issued an improper command. The two
                   letters following indicate the error.

      Code                                Meaning

      INVCU        An error occurred in transmission.

      INVMS        The command was too long or was followed by a
                   semicolon.

      INVPS        An improper number parameters were issued.

      INVPV        The parameters were ignored or invalid.

                            LINK STORED NUMBERS

  Type:                Configuration

  Format:              PRLm;n

  Example:             PRL1;2<CR>

  Description:         Links memory location m to memory location n. If a
                       call to location m fails, the number at n will be
                       dialed.

                                  REDIAL

  Type:          Immediate

  Format:        CRRn

  Example:       CRR4<CR>

  Description:   Redials the last number dialed up to n times.

                          REPORT PRODUCT VERSION

  Type:          Immediate

  Format:        RLV

  Example:       RLV<CR>

  Description:   Reports product version.

                       RESET MODEM TO STORED PROFILE

  Type:          Immediate

  Format:        PRPn

  Example:       PRP3<CR>

  Description:   Resets modem to stored profile n.

                                SET OPTIONS

  Type:                Configuration

  Format:              PROnnn;aa;bb;cc...

  Example:             PRO112;02;01<CR>

  Description:         Sets various options. The first number is the
                       first address to set. Following parameters set the
                       addresses, starting with nnn and progressing. In
                       this example, address 112 would be set to 02 and
                       address 113 would be set to 01.

                           STORE ACTIVE PROFILE

  Type:          Immediate

  Format:        PRK

  Example:       PRK<CR>

  Description:   Writes the values for the current profile into the
                 non-volatile RAM.

