
U.S. ROBOTICS, INC.

COURIER V.32TERBO FAX WITH ASL

Card Type                    Fax, Modem (asynchronous)
Chip Set                     U.S. Robotics
Maximum Data Rate            28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     Unidentified
Fax Class                    Unidentified
Data Modulation Protocol     Bell 103/212A

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis,
                             V.32terbo
Fax Modulation Protocol      Unidentified
Error Correction/Compression MNP5, V.42, V.42bis

                                                                      V1986

                        USER CONFIGURABLE SETTINGS

                      Setting                         Label      Position

  DTR normal                                          SW1/1        Off

  DTR forced high                                     SW1/1        On

  Verbal result codes                                 SW1/2        Off

  Numeric result codes                                SW1/2        On

  Enable result codes displayed                       SW1/3        On

  Disable result codes displayed                      SW1/3        Off

  Local echo enabled                                  SW1/4        Off

  Local echo disabled                                 SW1/4        On

  Auto answer disabled                                SW1/5        On

  Auto answer enabled                                 SW1/5        Off

  CD signal normal                                    SW1/6        Off

  CD signal forced high                               SW1/6        On

  Result codes displayed during both answer and       SW1/7        Off
  originate mode

  Result codes displayed in originate mode only       SW1/7        On

  Smart mode enabled                                  SW1/8        On

  Dumb mode enabled                                   SW1/8        Off

  Normal operation enabled                            SW1/9        On

  Escape sequence enabled                             SW1/9        Off

  Restore NVRAM defaults                              SW1/10       Off

  Restore factory defaults                            SW1/10       On

  SEND/RECEIVE PIN ASSIGNMENT

    Setting       Quad Switch

     Normal           Off

    Not used           On

                         Proprietary AT Command Set

                                   ABORT

  Type:          Immediate

  Format:        Any key

  Description:   Aborts answering/originating a call; modem hangs up.

                                  ANSWER

  Type:                Immediate

  Format:              AT [cmds] A

  Description:         Enables manual answer mode, the modem goes
                       off-hook; pressing any key will abort.

                              ANSWER SEQUENCE

  Type:          Configuration

  Format:        AT [cmds] Bn [cmds]

  Description:   Selects the answer sequence the modem will use

    Command                              Function

       B0        V.32 mode/ITU-T answer sequence enabled

       B1        HST mode/Bell answer tone enabled

                                 ATTENTION

  Type:              Immediate

  Format:            AT [cmds]

  Description:       Tells the modem that a command follows or use alone
                     to test OK result code

  BIT MAPPED REGISTERS

  Register     Default

    S51           0

                          BIT-MAPPED REGISTER S13

  Format             AT [cmds] S13=n [cmds]

  Default:           0

  Range:             0-255

  Unit:              Bit-mapped

  Description:       Controls DTR reset, DTR dialing, reset dialing, HST
                     modulation, and MNP3.

   Bit      Value                          Function

    0            0   DTR normal

                1    Reset on low DTR

    1            0   Normal auto answer operation

                1    When ring is received, enter originate and listen
                     for answer tone

    2            0   Pause 250msec. Before displaying result codes

                1    Immediate result code display

    3            0   DTR dialing disabled

                1    DTR dialing enabled

    4            0   Reset dialing disabled

                1    Reset dialing enabled

    5            0   HST modulation enabled

                1    HST modulation disabled

    6            0   MNP 3 enabled

                1    MNP 3 disabled

    7            0   Hardware reset disabled

                1    Hardware reset enabled

                          BIT-MAPPED REGISTER S15

  Format:               AT [cmds] S15=n [cmds]

  Default:              0

  Range:                0-255

  Unit:                 Bit-mapped

  Description:          Controls HST high frequency equalization, online
                        fallback, back channel, non-error-correcting mode
                        buffer, MNP4, BS/DEL switch, MNP compliance, and
                        Custom applications.

   Bit       Value                          Function

    0               0   HST high frequency equalization enabled

                   1    HST high frequency equalization disabled

    1               0   Online fallback enabled

                   1    Online fallback disabled

    2               0   300bps back channel enabled

                   1    300bps back channel disabled

    3               0   Non-error-correcting mode transmit buffer set to
                        1.5KB
                   1
                        Non-error-correcting mode transmit buffer set to
                        128 bytes

    4               0   MNP 4 enabled

                   1    MNP 4 disabled

    5               0   Use backspace key for delete disabled

                   1    Use backspace key for delete enabled

    6               0   MNP normal

                   1    MNP adjusted for non compliant modems

    7               0   Custom applications only disabled

                   1    Custom applications only enabled

                          BIT-MAPPED REGISTER S27

  Format:               AT [cmds] S27=n [cmds]

  Default:              0

  Range:                0-191

  Unit:                 Bit-mapped

  Description:          Controls V.21, V.32 encoding and modulation, V.42
                        answer tone and handshake, and Unusual software
                        incompatibility.

   Bit        Value                         Function

    0                0  V.21 disabled

                    1   V.21 enabled

    1                0  V.32 trellis coding disabled

                    1   V.32 trellis coding enabled

    2                0  V.32 modulation enabled

                    1   V.32 modulation disabled

    3                0  2100Hz answer tone enabled

                    1   2100Hz answer tone disabled

    4                0  MNP handshake enabled

                    1   MNP handshake disabled

    5                0  V.42 detection phase enabled

                    1   V.42 detection phase disabled

    6               0   Not used

    7                0  Unusual software incompatibility disabled

                    1   Unusual software incompatibility enabled

                          BIT-MAPPED REGISTER S32

  Format            AT [cmds] S34=n [cmds]

  Default:          0

  Range:            0-63

  Unit:             Bit-mapped

  Description:      Controls V.23/V.32/V.32bis modulations. Change LED
                    and enable MI/MIC.

   Bit     Value                          Function

    0           0   V.32bis enabled

               1    V.32bis disabled

    1           0   Enhanced V.32 enabled

               1    Enhanced V.32 disabled

    2           0   Quick V.32 retrain enabled

               1    Quick V.32 retrain disabled

    3           0   V.23 disabled

               1    V.23 enabled

    4           0   Do not change MR LED to represent DSR

               1    Change MR LED to represent DSR

    5           0   Disable MI/MIC

               1    Enable MI/MIC

                               BREAK LENGTH

  Type:            Register

  Format:          AT [cmds] S21=n [cmds]

  Default:         10

  Range:           0-255

  Unit:            .01 second

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

                                BREAK TYPE

  Type:          Configuration

  Format:        AT [cmds] &Yn [cmds]

  Description:   Configures action of break signal

    Command                              Function

      &Y0        Empty buffer only

      &Y1        Empties buffer and break is sent immediately

      &Y2        Do not empty buffer and break is sent immediately

      &Y3        Do not empty buffer or send break

                            CARRIER DETECT (CD)

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  Description:   Controls the CD signal

    Command                              Function

      &C0        Modem does not respond to CD signal

      &C1        CD signal normal

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Selects data compression

    Command                              Function

      &K0        Data compression disabled

      &K1        Auto enabled/disable data compression

      &K2        Data compression enabled

      &K3        V.42bis data compression enabled

                             CONNECTION SPEED

  Type:              Configuration

  Format:            AT [cmds] &Nn [cmds]

  Description:       Sets required connection speed, modem will hang up
                     if it cannot connect.

      Command                              Function

        &N0          Variable

        &N1          300bps

        &N2          1200bps

        &N3          2400bps

        &N4          4800bps

        &N5          7200bps

        &N6          9600bps

        &N7          12Kbps

        &N8          14.4Kbps

        &N9          16.8Kbps

       &N10          21.6Kbps

                           DATA SET READY (DSR)

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Description:   Selects DSR options

    Command                              Function

      &S0        DSR forced high

      &S1        DSR controlled by modem

      &S2        DSR toggled, CTS follows CD

      &S3        DSR toggled

      &S4        Modem sends DTE DSR signal following CD signal

                         DATA TERMINAL READY (DTR)

  Type:          Configuration

  Format:        AT [cmds] &Dn [cmds]

  Description:   Selects modem response to DTR

    Command                              Function

      &D0        Modem does not respond to DTR

      &D1        Modem goes to command mode after DTR toggles

      &D2        Modem uses DTR as normal

                              CTS/RTS - DELAY

  Type:          Configuration

  Format:        AT [cmds] S26=n [cmds]

  Default:       1

  Range:         0-255

  Unit:          .1 second

  Description:   Sets the length of time between RTS and CTS signal
                 sending

                                   DIAL

  Type:                 Immediate

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

  Example:              ATDT 443-3388,,,1111;

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

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

        Command                             Function

           P            Pulse dialing enabled

           T            Tone dialing enabled

           ,            Dialing paused for 2 seconds

           ;            Modem returned to command state after dialing.
                        Can only be placed at the end of the dial
                        command.

           "            Dials letters as if they were numbers;
                        ATDT"GOMICRO"

           !            Flash function initiated

           @            Dial, wait for quiet answer, then continue to
                        execute the rest of the dial string

           W            Dial, wait for second dial tone, then continue to
                        execute the rest of the dial string

           R            Answer mode enabled; originate mode disabled
                        following handshake initiation.

                            DIAL - LAST NUMBER

  Type:          Immediate

  Format:        AT [cmds] DL [cmds]

  Description:   Re-dial last number dialed

                           DIAL - STORED NUMBER

  Type:          Immediate

  Format:        AT [cmds] DSn [cmds]

  Description:   Dial stored number from memory location n

                          DISCONNECT BUFFER DELAY

  Type:                  Register

  Format                 AT [cmds] S38=n [cmds]

  Default:               0

  Range:                 0-255

  Unit:                  1 second

  Description:           Sets maximum duration allowed during buffered
                         data calls for modem to perform clearing
                         functions after losing carrier-signal or
                         receiving a clear call signal from the remote
                         modem and before initiating hang-up process. A
                         value of 0 will allow the modem to hanging-up
                         after DTR drops.

                                   ECHO

  Type:            Configuration

  Format:          AT [cmds] En [cmds]

  Description:     Controls echo function; display keyboard commands when
                   enabled.

     Command                             Function

       E0          Echo function disabled

       E1          Echo function enabled

                              ECHO - ON-LINE

  Type:          Configuration

  Format:        AT [cmds] Fn [cmds]

  Description:   Selects whether data sent while in data mode are echoed

    Command                              Function

       F0        Local echo enabled

       F1        Local echo disabled

                        ERROR CORRECTION MODE (ARQ)

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects active error correction protocols

    Command                              Function

      &M0        Normal mode only

      &M1        Asynchronous command mode and synchronous data mode

      &M4        Normal/ARQ mode

      &M5        ARQ mode only

      &M6        Character-oriented synchronous

      &M7        HDLC synchronous

                              ESCAPE SEQUENCE

  Type:                   Immediate

  Format:                 +++AT [cmds] <CR>

  Description:            Initiates the escape sequence and returns the
                          modem to the on-line command state if it
                          receives three escape characters set in S2
                          within the time allotted by S12.

            Note: Do not precede this command with AT.

                           EXTENDED COMMAND SET

  Type:               Immediate

  Format:             AT <prefix>

  Description:        Shows command help screens for all commands
                      beginning with the given prefix.

      Command                              Function

         &            Shows AT& extended command set

         %            Shows AT% extended command set

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] &An [cmds]

  Description:   Selects extended result codes

    Command                              Function

      &A0        Extended result codes disabled

      &A1        ARQ result codes enabled

      &A2        ARQ result codes enabled and V.32 result code added

      &A3        Error control and compression result codes enabled

                          FACTORY DEFAULT PROFILE

  Type:          Configuration

  Format:        AT [cmds] &Fn [cmds]

  Description:   Loads factory profile into non-volatile memory

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

  Format:        AT [cmds] S23=n [cmds]

  Default:       19

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character used to represent XOFF.

                       FLOW CONTROL CHARACTER - XON

  Type:          Register

  Format:        AT [cmds] S22=n [cmds]

  Default:       17

  Range:         0-127

  Unit:          ASCII

  Description:   Sets the character used to represent XON.

                         FLOW CONTROL PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] &In [cmds]

  Description:   Allows modem to act on, then transmit XON/XOFF
                 characters.

    Command                              Function

      &I0        Software flow control disabled

      &I1        XON/XOFF passthrough enabled

      &I2        XON/XOFF passthrough disabled

      &I3        ENQ/ACK enabled in host mode

      &I4        ENQ/ACK enabled in terminal mode

      &I5        XON/XOFF passthrough disabled in error correction mode

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] &Hn [cmds]

  Description:   Sets type of flow control used by modem

    Command                              Function

      &H0        Flow control disabled

      &H1        CTS/RTS flow control enabled

      &H2        XON/XOFF flow control enabled

      &H3        CTS/RTS and XON/XOFF flow control enabled

                             FLOW CONTROL TYPE

  Type:           Configuration

  Format:         AT [cmds] &Rn [cmds]

  Description:    Controls receive data hardware flow control and RTS
                  signals

    Command                              Function

      &R0         Delay CTS after RTS. See S26 on length of time.

      &R1         Modem ignores RTS

      &R2         Received data to DTE when RTS is on

                                GUARD TIME

  Type:          Register

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

  Default:       100

  Range:         0-255

  Unit:          .02 second

  Description:   Sets guard time for remote access sequence

                                GUARD TONE

  Type:          Configuration

  Format:        AT [cmds] &Gn [cmds]

  Description:   Commands the modem to transmit a guard tone

            Note: Used primarily for international data transmission

    Command                              Function

      &G0        Guard tone disabled

      &G1        550Hz guard tone enabled

      &G2        1800Hz guard tone enabled

                              HANDSHAKE TIMER

  Type:                   Register

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

  Default:                8

  Range:                  0-255

  Unit:                   .1 second

  Description:            Sets the length of handshake time, so modems
                          with V.32bis, V.FC and V.34 are given a chance
                          to connect at 9600bps or higher.

                               HOOK CONTROL

  Type:          Immediate

  Format:        AT [cmds] Hn [cmds]

  Description:   Selects whether the modem is on-hook or off-hook

    Command                              Function

       H0        Modem commanded to go on-hook (hang-up)

       H1        Modem commanded to go off-hook (pick-up)

                             INACTIVITY TIMER

  Type:                  Register

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

  Default:               0

  Range:                 0-90

  Unit:                  1 minute

  Description:           Sets the length of time that the modem does not
                         receive information before it disconnects. S19=0
                         will disable.

                                 LINE TYPE

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Description:   Select the line type

    Command                              Function

      &L0         Dial-up enabled

      &L1         Leased-line enabled

      &L2         HST cellular enabled

                          LIST AMPERSAND COMMANDS

  Type:          Immediate

  Format:        AT [cmds] &$ [cmds]

  Description:   Displays ampersand (&) commands

                            LIST BASIC COMMANDS

  Type:          Immediate

  Format:        AT [cmds] $ [cmds]

  Description:   Displays basic commands

                            LIST DIAL COMMANDS

  Type:          Immediate

  Format:        AT [cmds] D$ [cmds]

  Description:   Displays dial commands

                           LIST PERCENT COMMANDS

  Type:          Immediate

  Format:        AT [cmds] %$ [cmds]

  Description:   Displays percent (%) commands

                             LIST S-REGISTERS

  Type:          Immediate

  Format:        AT [cmds] S$ [cmds]

  Description:   Displays the S-registers

                            LOCAL CONFIGURATION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Set local configuration remotely

    Command                              Function

      %C0         Defer configuration until call terminated

      %C1         Restore original configuration

      %C2         Execute configuration immediately

                          LOCAL SERIAL PORT SPEED

  Type:          Register

  Format:        AT [cmds] %Bn [cmds]

  Description:   Selects DTE speed remotely

    Command                              Function

      %B0        Sets to 110bps speed

      %B1        Sets to 300bps speed

      %B2        Sets to 600bps speed

      %B3        Sets to 1200bps speed

      %B4        Sets to 2400bps speed

      %B5        Sets to 4800bps speed

      %B6        Sets to 9600bps speed

      %B7        Sets to 19.2Kbps speed

      %B8        Sets to 38.4Kbps speed

      %B9        Sets to 57.6Kbps speed

      %B10       Sets to 115.2Kbps speed

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] &Bn [cmds]

  Description:   Sets operation of serial port speed

    Command                              Function

      &B0        Serial speed follows connect speed

      &B1        Serial speed locked

      &B2        Serial speed locked in ARQ mode, Variable in non-ARQ
                 mode.

                              LOG-ON ATTEMPTS

  Type:           Register

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

  Default:        0

  Range:          0-255

  Unit:           Attempts

  Description:    Sets the number of allowable log-on attemtps for remote
                  access

                                  ON-LINE

  Type:           Immediate

  Format:         AT [cmds] On [cmds]

  Description:    Controls on-line command (data transmission) mode
                  options.

            Note: The O command must be placed at the end of the command
            string.

     Command                             Function

       O0         On-line command mode with no retraining enabled

       O1         On-line command mode with retraining enabled

                                  PARITY

  Type:          Configuration

  Format:        AT [cmds] %Fn [cmds]

  Description:   Sets parity and data bits remotely

    Command                              Function

      %F0         No Parity, 8 data bits

      %F1         Mark Parity, 7 data bits

      %F2         Parity odd, 7 data bits

      %F3         Parity even, 7 data bits

                                 PASSWORD

  Type:          Configuration

  Format:        Read: AT [cmds] %Pn? [cmds]

                 Write: AT [cmds] %Pn=x [cmds]

  Description:   Reads or writes a password to memory location n. n=0-1

                                   PAUSE

  Type:          Immediate

  Format:        AT [cmds] / [cmds]

  Description:   Pause for 125 msec

                               PULSE DIALING

  Type:              Configuration

  Format:            AT [cmds] P [cmds]

  Description:       Enables pulse dialing

            Note: This command can be duplicated with the P modifier in
            the D (Dial) command.

                            PULSE DIALING RATIO

  Type:          Configuration

  Format:        AT [cmds] &Pn [cmds]

  Description:   Selects pulse dial make/break ratio

    Command                              Function

      &P0        39/61ms at 10pps (North America)

      &P1        33/67ms at 10pps (Europe)

                          RECONNECT - LEASED-LINE

  Type:                  Register

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

  Default:               15

  Range:                 0-255

  Unit:                  1 second

  Description:           Sets the length of time the modem senses loss of
                         carrier before re-establishing a leased-line
                         conntion

                      REMOTE ACCESS ESCAPE CHARACTER

  Type:           Register

  Format          AT [cmds] S42=n [cmds]

  Default:        126

  Range:          0-255

  Unit:           ASCII

  Description:    Selects a character used for the remote access escape
                  sequence

                            REPEAT CONTINUALLY

  Type:                  Configuration

  Format:                AT [cmds] > [cmds]

  Description:           Causes modem to repeat command string
                         continually or up to 10 dial attempts; until a
                         keyboard key is pressed

                    REPEAT PREVIOUS COMMAND CONTINUALLY

  Type:           Immediate

  Format:         AT [cmds] A> [cmds]

  Description:    Repeat previous command continually

            Note: Do not precede this command with AT, or follow it with
            <CR>.

                          REPEAT PREVIOUS COMMAND

  Type:           Immediate

  Format:         A/

  Description:    Repeat previous command only once

            Note: Do not precede this command with AT, or follow it with
            <CR>.

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports product code

       I1        Reports ROM checksum

       I2        Reports RAM checksum

       I3        Reports call duration and real time

       I4        Reports current command settings

       I5        Reports NVRAM settings

       I6        Reports link diagnostics

       I7        Reports product configuration

      I10        Reports dial security account status

                               RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] Qn [cmds]

  Description:   Enables modem to send result codes to the DTE

    Command                              Function

       Q0        Result code sending enabled

       Q1        Result code sending disabled

       Q2        Result code sending enabled while in originate mode

                            RESULT CODE FORMAT

  Type:             Configuration

  Format:           AT [cmds] Vn [cmds]

  Description:      Selects word or numeric format for information-text
                    and result codes

     Command                              Function

        V0          Numeric format enabled

        V1          Verbose (word) format enabled

                                 SECURITY

  Type:              Register

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

  Default:           0

  Range:             0-7

  Description:       Controls security features

     Bit      Value                         Function

      0             0   Dial security disabled

                   1    Dial security enabled

      1             0   Password prompting disabled

                   1    Password prompting enabled

      2             0   Local access passsword protection disabled

                   1    Local access passsword protection enabled

                     SELECT CALL PROGRESS RESULT CODES

  Type:               Configuration

  Format:             AT [cmds] Xn [cmds]

  Default:            X7

  Description:        Enables selection of tone detection and associated
                      result code format options

                                SOFT RESET

  Type:           Immediate

  Format:         AT [cmds] Z [cmds]

  Description:    Restores modem profile previously saved in non-volatile
                  memory

                               SPEAKER MODE

  Type:                Configuration

  Format:              AT [cmds] Mn [cmds]

  Description:         Selects various speaker options

       Command                             Function

         M0            Speaker disabled

         M1            Speaker enabled until carrier signal detected

         M2            Speaker enabled

         M3            Speaker enabled following dialing, then disabled
                       after carrier signal detected.

                              STATUS-REGISTER

  Type:           Configuration

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

                  Write: AT [cmds] Sn=x [cmds]

  Description:    Writes to or reads from a specified register

     Command                             Function

     Sn.b=x        Write to register bit b using values 0 (off) and 1
                   (on) for x

                           STORE ACTIVE PROFILE

  Type:          Configuration

  Format:        AT [cmds] &W [cmds]

  Description:   Writes active profile into the non-volatile memory

                          STORE TELEPHONE NUMBER

  Type:               Configuration

  Format:             AT [cmds] &Zn=x [cmds]

  Description:        Writes selected telephone numbers into the
                      non-volatile memory at location n

            Note: The characters described in the D command are valid for
            use in the &Z command.

       Command                             Function

        &Zn=L         Writes last executed dial string into the
                      non-volatile memory at location n

        &Zn?          Displays phone number from non-volatile memory at
                      location n

        &ZC=x         Writes command string into the non-volatile memory
                      at location n

        &ZC?          Displays stored command string

                         SYNCHRONOUS CLOCK SOURCE

  Type:          Configuration

  Format:        AT [cmds] &Xn [cmds]

  Description:   Select clock source

                          SYNCHRONOUS CLOCK SPEED

  Type:          Configuration

  Format:        AT [cmds] %Nn [cmds]

  Description:   Sets synchronous clock speed

                                TEST MODES

  Type:              Configuration

  Format:            AT [cmds] &Tn [cmds]

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

      Command                              Function

        &T0          Testing disabled

        &T1          Local analog loopback enabled

        &T3          Local digital loopback enabled

        &T4          Remote digital loopback enabled

        &T5          Remote digital loopback prohibited

        &T6          Remote digital loopback initiated

        &T7          Remote digital loopback w/ self-test

        &T8          Local analog loopback w/ self-test

                                TEST MODES

  Type:                Configuration

  Format:              AT [cmds] S16=n [cmds]

  Default:             0

  Range:               0-15

  Description:         Controls loopback tests; analog, digital, dial,
                       and test pattern tests.

     Bit        Value                        Function

      0              0   Local analog loopback disabled

                    1    Local analog loopback enabled

      1               0   Dial test disabled

                     1    Dial test enabled

      2               0   Test pattern disabled

                     1    Test pattern enabled

      3               0   Remote digital loopback not initiated

                     1    Remote digital loopback initiated

                                TEST TIMER

  Type:           Register

  Format          AT [cmds] S18=n [cmds]

  Default:        0

  Range:          0-255

  Unit:           1 second

  Description:    Sets the maximum duration for modem tests

            Note: S18=0 disables the timer and allows an indefinite
            duration.

                               TONE DIALING

  Type:              Configuration

  Format:            AT [cmds] T [cmds]

  Description:       Enables tone dialing mode

            Note: This command can be duplicated with the T modifier in
            the D (Dial) command.

                             TONE RECOGNITION

  Type:          Immediate

  Format:        AT [cmds] %T [cmds]

  Description:   Enables tone recognition

                            VOICE/DATA OPTIONS

  Type:           Register

  Format:         AT [cmds] S32=n [cmds]

  Description:    Select various options the modem will perform

    Command                              Function

     S32=0        Disabled

     S32=1        Modem commanded to go off-hook (pick-up) in originate
                  mode

     S32=2        Modem commanded to go off-hook (pick-up) in answer mode

     S32=3        Re-dial last number dialed

     S32=4        Dial stored number at memory location 0

     S32=5        Auto-answer toggle on/off

     S32=6        Reset modem

     S32=7        Remote digital loopback initiated

     S32=8        Busy out phone line toggle

     S32=9        Execute stored command string

                             V.21 - HANDSHAKE

  Type:          Register

  Format:        AT [cmds] S29=n [cmds]

  Default:       20

  Range:         0-255

  Unit:          .1 second

  Description:   Sets the length of handshake time for V.21.

                             V.32 - HANDSHAKE

  Type:          Register

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

  Default:       8

  Range:         0-255

  Unit:          .1 second

  Description:   Sets the length of handshake time for V.32.

