
U.S. ROBOTICS, INC.

COURIER V.32/PC

Card Type                    Modem (asynchronous)
Chip Set                     U.S. Robotics
Maximum Data Rate            14.4Kbps
Data Bus                     Unidentified
Data Modulation Protocol     Unidentified
Error Correction/Compression Unidentified

                                                                      V1985

                        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

  Display result codes in originate and answer        SW1/7        Off
  mode

  Display result codes 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

                         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 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, custom applications and MNP
                        compliance.

   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   Custom applications only

                   1    Custom applications only

    6               0   MNP normal

                   1    MNP adjusted for non compliant modems

                          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, and high
                    speed rate shift

   Bit     Value                          Function

    0            0  V.21 disabled

                1   V.21 enabled

    1            0  V.32 non-trellis coding disabled

                1   V.32 non-trellis coding enabled

    2            0  V.32 modulation enabled

                1   V.32 modulation disabled

  3 - 5       000   Not used

    6            0  19.2Kbps enabled. High speed rate shift needs to be
                    enabled.
                1
                    38.4Kbps enabled. High speed rate shift needs to be
                    enabled.

    7            0  High speed rate shift disabled

                1   High speed rate shift enabled

                               BREAK LENGTH

  Type:            Register

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

  Default:         10

  Range:           0-255

  Unit:            10 ms

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

                                   CLOCK

  Type:               Configuration

  Format:             AT [cmds] Kn [cmds]

  Description:        Displays connection duration or real time

       Command                              Function

         K0            Connection duration displayed in ATI3

         K1            Real time displayed in ATI3. To set clock
                       (military time) use ATI3=HH:MM:SSK1.

                           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

                                   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 - 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.

                                 DSR DELAY

  Type:          Register

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

  Default:       25

  Range:         0-255

  Unit:          .1 second

  Description:   Sets the length of the DSR pulse signal

                                   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

                              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.

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

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

  Default:       19

  Range:         11-127

  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:         11-127

  Unit:          ASCII

  Description:   Sets the character used to represent XON

                             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

                         FLOW CONTROL PASSTHROUGH

  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

                                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

                               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)

                          LIST AMPERSAND COMMANDS

  Type:          Immediate

  Format:        AT [cmds] &$ [cmds]

  Description:   Displays ampersand (&) commands

                            LIST DIAL COMMANDS

  Type:          Immediate

  Format:        AT [cmds] D$ [cmds]

  Description:   Displays dial commands

                             LIST S-REGISTERS

  Type:          Immediate

  Format:        AT [cmds] S$ [cmds]

  Description:   Displays the S-registers

                                  ON-LINE

  Type:           Immediate

  Format:         AT [cmds] O [cmds]

  Description:    Returns to on-line command (data transmission) mode.

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

                               ON-LINE HELP

  Type:          Immediate

  Format:        AT [cmds] $ [cmds]

  Description:   On-line help; displays basic command list.

                                   PAUSE

  Type:           Immediate

  Format:         AT [cmds] / (slash) [cmds]

  Description:    125 msec delay before proceeding with dial string or
                  command

                               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)

                               RECEIVE-ONLY

  Type:                Configuration

  Format:              AT [cmds] Cn [cmds]

  Description:         Sets receive-only; used if modem is attached to
                       additional monitoring-only systems

       Command                              Function

          C0            Disables transmitter

          C1            Enables transmitter

                           REPEAT COMMAND STRING

  Type:                  Configuration

  Format:                AT [cmds] > [cmds]

  Example:               AT>DT5551212 or ATDT5551212>

  Description:           Causes modem to repeat command string until a
                         keyboard key is pressed

            Note: If used before or after the ATD command, the modem will
            redial the number until a connection is established or a
            maximum of ten attempts is reached.

                          REPEAT PREVIOUS COMMAND

  Type:           Immediate

  Format:         A/

  Description:    Repeats previous command; mainly used for redial.

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

                               RTS/CTS DELAY

  Type:          Register

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

  Default:       1

  Range:         0-255

  Unit:          .1 second

  Description:   Sets the length of time between RTS and CTS

                            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 connection duration and real time

       I4        Reports current command settings

       I5        Reports NVRAM settings

       I6        Reports link diagnostics

       I7        Reports product configuration

                               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

                            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

                     SELECT CALL PROGRESS RESULT CODES

  Type:                  Configuration

  Format:                AT [cmds] Xn [cmds]

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

        Command                              Function

           X0            Busy and dial tone detection disabled; result
                         codes 0-4 enabled.

           X1            Busy and dial tone detection disabled; result
                         codes 0-5, 10, 13, and 18 enabled

           X2            Busy tone detection disabled, dial tone
                         detection enabled; result codes 0-6, 10, 13, and
                         18 enabled; also adaptive dialing, and fast
                         dialing enabled.

           X3            Busy tone detection enabled, dial tone detection
                         disabled; result codes 0-5, 7-18 enabled; also
                         adaptive dialing, wait for second dial tone, and
                         wait for answer enabled.

           X4            Busy and dial tone detection enabled; result
                         codes 0-10, 13, and 18 enabled; also adaptive
                         dialing, wait for second dial tone, wait for
                         answer, and fast dialing enabled.

           X5            Busy tone detection enabled, dial tone detection
                         disabled; result codes 0-5, 7-18 enabled; also
                         adaptive dialing, wait for second dial tone, and
                         wait for answer enabled.

           X6            Busy and dial tone detection enabled; result
                         codes 0-18 enabled; also adaptive dialing, wait
                         for second dial tone, wait for answer, and fast
                         dialing enabled.

           X7            Busy and dial tone detection enabled; result
                         codes 0-11, 13, and 18 enabled; also adaptive
                         dialing, wait for second dial tone, wait for
                         answer, and fast dialing enabled.

  Note: Valid numeric result codes; 0-8, 10-13, and 18.

                                SOFT RESET

  Type:          Immediate

  Format:        AT [cmds] Z [cmds]

  Description:   Restores modem software default profile

                               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.

                              SPEAKER VOLUME

  Type:          Configuration

  Format:        AT [cmds] Ln [cmds]

  Description:   Controls speaker volume

    Command                              Function

       L0        Low volume setting

       L1        Low volume setting

       L2        Medium volume setting

       L3        Highest volume setting

                              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

                                TEST MODES

  Type:                Configuration

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

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

       Command                              Function

        S16=0          Testing disabled

        S16=1          Local digital loopback enabled

        S16=2          Dial test (Factory testing only)

        S16=4          Test pattern enabled (transmitted on CONNECT,
                       either on answering or originate)

        S16=5          Local analog loopback and test pattern enabled

        S16=8          Remote digital loopback enabled

                               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.

                           V.32 - HANDSHAKE TIME

  Type:          Register

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

  Default:       8

  Range:         0-255

  Unit:          .1 second

  Description:   Sets length of V.32 handshake

