
ECHO COMMUNICATIONS

I336PF

Card Type                    Modem (asynchronous)
Chipset                      U.S. Robotics
Maximum Data Rate            33.6Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation              Bell 103A/212A

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

                             Rockwell V.FC
Fax Modulation               ITU-T V.17, V21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Class I & II
Data Bus                     8-bit ISA

[Image]

                                CONNECTIONS

          Function             Label           Function             Label

  Telephone line               CN1     Telephone line               CN2

                      SUPPORTED STANDARD COMMANDS

                           Basic AT Commands

  +++, comma, A/

  A, B, C, D, E, F, H, L, M, O, P, Q, T, V, X

  &C, &D, &G, &P, &R, &S, &T, &W

                              S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38

            Note: See MHI help file for complete information.

                         Proprietary AT Command Set

                          BIT-MAPPED REGISTER S13

  Format           AT [cmds] S13=n [cmds]

  Default:         0

  Range:           0 - 217

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

   Bit    Value                           Function

    0          0   DTR normal.

              1    Reset on low DTR.

  2, 1       00    Not used.

    3          0   DTR dialing disabled.

              1    DTR dialing enabled.

    4          0   Reset dialing disabled.

              1    Reset dialing enabled.

    5         0    Not used.

    6          0   MNP 3 enabled.

              1    MNP 3 disabled.

                          BIT-MAPPED REGISTER S15

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

  Default:          0

  Range:            0 - 56

  Description:      Controls non-error-correcting mode buffer, MNP4, and
                    BS/DEL switch.

   Bit     Value                          Function

  2 - 0      000    Not used.

    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   Backspace and delete keys normal.

               1    Backspace and delete keys reversed.

                          BIT-MAPPED REGISTER S27

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

  Default:               0

  Range:                 0 - 191

  Description:           Controls V.21, V.32 encoding and modulation,
                         V.42 answer tone and handshake, and 9600 result
                         codes.

    Bit       Value                          Function

     0                0  V.21 disabled.

                     1   V.21 enabled.

     1                0  V.32 trellis coding enabled.

                     1   V.32 trellis coding disabled.

     2                0  V.32 modulation enabled.

                     1   V.32 modulation disabled.

     3                0  2100Hz answer tone enabled.

                     1   2100Hz answer tone disabled.

   5, 4              00  V.42 detect, LAPM and MNP enabled.

                     01  V.42 detect and LAPM enabled.

                     10  MNP enabled.

                    11   LAPM enabled.

     6               0   Not used.

     7                0  Actual result codes displayed.

                     1   Force 9600 result codes.

                               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.

                                BREAK TYPE

  Type:             Configuration

  Format:           AT [cmds] &Yn [cmds]

  Description:      Configures action of break signal.

     Command                              Function

       &Y0          Break empties buffer and is not send to remote modem.

       &Y1          Break empties buffer and is sent immediately to
                    remote modem.

       &Y2          Break does not empty buffer and is sent immediately
                    to remote modem.

                     COMPRESSION AND ERROR CORRECTION

  Type:            Register

  Format:          AT [cmds] S51=n [cmds]

  Default:         0

  Range:           0 - 7

  Description:     Selects compression and error correction for specific
                   modulations.

   Bit     Value                          Function

    0           0  MNP/V.42 enabled during V.22 operation.

               1   MNP/V.42 disabled during V.22 operation.

    1           0  MNP/V.42 enabled during V.22bis operation.

               1   MNP/V.42 disabled during V.22bis operation.

    2           0  MNP/V.42 enabled during V.32bis operation.

               1   MNP/V.42 disabled during V.32bis operation.

                             COMPRESSION MODE

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Selects the type of data compression that will be used.

    Command                              Function

      &K0        Data compression disabled.

      &K1        Auto-detect compression mode.

      &K2        Data compression enabled.

      &K3        MNP5 data compression only enabled.

                       CONNECTION SPEED UPPER LIMIT

  Type:                  Configuration

  Format:                AT [cmds] &Nn [cmds]

  Description:           Sets required connection speed if &U is set to
                         0; otherwise, sets fastest allowed connection
                         speed.

        Command                              Function

          &N0            No maximum connect speed.

          &N1            Set maximum connect speed to 300bps.

          &N2            Set maximum connect speed to 1200bps.

          &N3            Set maximum connect speed to 2400bps.

          &N4            Set maximum connect speed to 4800bps.

          &N5            Set maximum connect speed to 7200bps.

          &N6            Set maximum connect speed to 9600bps.

          &N7            Set maximum connect speed to 12Kbps.

          &N8            Set maximum connect speed to 14.4Kbps.

          &N9            Set maximum connect speed to 16.8Kbps.

          &N10           Set maximum connect speed to 19.2Kbps.

          &N11           Set maximum connect speed to 21.6Kbps.

        CONNECTION SPEED UPPER LIMIT (CONT)

  Command                   Function

   &N12     Set maximum connect speed to 24Kbps.

   &N13     Set maximum connect speed to 26.4Kbps.

   &N14     Set maximum connect speed to 28.8Kbps.

   &N15     Set maximum connect speed to 31.2Kbps.

   &N16     Set maximum connect speed to 33.6Kbps.

                       CONNECTION SPEED LOWER LIMIT

  Type:            Configuration

  Format:          AT [cmds] &Un [cmds]

  Description:     Sets slowest allowed connection speed if &N is set to
                   1 or higher.

     Command                              Function

       &U0         No minimum connect speed.

       &U1         Set minimum connect speed to 300bps.

       &U2         Set minimum connect speed to 1200bps.

       &U3         Set minimum connect speed to 2400bps.

       &U4         Set minimum connect speed to 4800bps.

       &U5         Set minimum connect speed to 7200bps.

       &U6         Set minimum connect speed to 9600bps.

       &U7         Set minimum connect speed to 12Kbps.

       &U8         Set minimum connect speed to 14.4Kbps.

       &U9         Set minimum connect speed to 16.8Kbps.

       &U10        Set minimum connect speed to 19.2Kbps.

       &U11        Set minimum connect speed to 21.6Kbps.

       &U12        Set minimum connect speed to 24Kbps.

       &U13        Set minimum connect speed to 26.4Kbps.

       &U14        Set minimum connect speed to 28.8Kbps.

                            DISPLAY INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays modem properties.

    Command                              Function

       I0        Displays product identification code.

       I1        Tests and displays ROM checksum result.

       I2        Tests and displays RAM checksum result.

       I3        Displays product type.

       I4        Displays current command settings.

       I5        Displays current NVRAM settings.

       I6        Displays current connections statistics.

       I7        Displays product configuration.

                         DISPLAY LAST DIAL STRING

  Type:          Immediate

  Format:        AT [cmds] &ZL? [cmds]

  Description:   Displays the last executed dial string.

                           ERROR CORRECTION MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects active error correction protocols.

    Command                              Function

      &M0        Normal mode only.

      &M4        Auto-detect mode.

      &M5        ARQ mode only.

                         ESCAPE SEQUENCE RESPONSE

  Type:            Register

  Format:          AT [cmds] S14=n [cmds]

  Description:     Controls the modem's reaction to an escape sequence.

     Command                              Function

      S14=0        Normal operation.

      S14=1        When +++ is received, modem disconnects and enters
                   command state.

                           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        V.32 result code enabled.

      &A3        Error control and compression result codes enabled.

                             FACTORY DEFAULTS

  Type:          Immediate

  Format:        AT [cmds] &Fn [cmds]

  Description:   Resets the modem to the specified factory profile.

    Command                              Function

      &F0        Modem resets to factory generic profile.

      &F1        Modem resets to factory hardware flow control profile.

      &F2        Modem resets to factory software flow control profile.

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

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

  Default:       19

  Range:         0 - 127

  Unit:          1 ASCII character

  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:          1 ASCII character

  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.

                             HELP - AMPERSAND

  Type:          Immediate

  Format:        AT [cmds] &$

  Description:   Displays the AT& command set.

                               HELP - BASIC

  Type:          Immediate

  Format:        AT [cmds] $

  Description:   Displays the basic (no prefix) AT command set.

                                HELP - DIAL

  Type:          Immediate

  Format:        AT [cmds] D$

  Description:   Displays dialing options.

                             INACTIVITY TIMER

  Type:                  Register

  Format:                AT [cmds] S19=n [cmds

  Default:               0

  Range:                 0 - 255

  Unit:                  1 minute

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

                             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 only.

                            PROFILE ON POWER-UP

  Type:             Configuration

  Format:           AT [cmds] Yn [cmds]

  Description:      Selects the profile to restore into the active
                    profile on power-up.

     Command                              Function

        Y0          Restore profile 0 on power-up.

        Y1          Restore profile 1 on power-up.

                                RESET MODEM

  Type:          Immediate

  Format:        AT [cmds] Zn [cmds]

  Description:   Resets the modem to the specified profile.

    Command                              Function

       Z0        Modem resets to profile set with the Y command.

       Z1        Modem resets to user profile 0.

       Z2        Modem resets to user profile 1.

       Z3        Modem resets to factory generic profile.

       Z4        Modem resets to factory hardware flow control profile.

       Z5        Modem resets to factory software flow control profile.

                          STORE TELEPHONE NUMBER

  Type:                  Configuration

  Format:                AT [cmds] &Zn=<#>

                         AT [cmds] &Zn=L

  Description:           Writes the indicated telephone number into the
                         non-volatile memory at location n. If the second
                         form is used, the last dial string executed will
                         be stored.

                             TONE DIALING TEST

  Type:          Register

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

  Description:   Begins a tone dialing test.

    Command                              Function

     S16=0       Tone dialing test disabled.

     S16=2       Tone dialing test enabled.

                       V.32 AND V.32bis MODULATIONS

  Type:            Register

  Format:          AT [cmds] S34=n [cmds]

  Default:         6

  Range:           0 - 15

  Description:     Controls V.32 and V.32bis modulations.

   Bit    Value                           Function

    0          0   V.32bis enabled.

              1    V.32bis disabled.

  2, 1       11    Not used.

    3          0   V.32 modulation disabled.

              1    V.32 modulation enabled.

                            V.32 HANDSHAKE TIME

  Type:          Register

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

  Default:       8

  Range:         0 - 255

  Unit:          .1 second

  Description:   Sets the length of the V.32 handshaking phase.

                           V.34 AND V.FC OPTIONS

  Format:                AT [cmds] S56=n [cmds]

  Default:               0

  Range:                 0 - 223

  Description:           Controls non-linear coding, transmit level
                         deviation, pre-emphasis, pre-coding, shaping,
                         V.34, and V.FC.

   Bit        Value                          Function

    0                0   Non-linear coding enabled.

                    1    Non-linear coding disabled.

    1                0   Transmit level deviation enabled.

                    1    Transmit level deviation disabled.

    2                0   Pre-emphasis enabled.

                    1    Pre-emphasis disabled.

    3                0   Pre-coding enabled.

                    1    Pre-coding disabled.

    4                0   Shaping enabled.

                    1    Shaping disabled.

    5               0    Not used.

    6                0   V.34 enabled.

                    1    V.34 disabled.

    7                0   V.FC enabled.

                    1    V.FC disabled.

                               V.34 MAPPING

  Type:            Register

  Format:          AT [cmds] S55=n [cmds]

  Default:         0

  Range:           0 - 15

  Description:     Controls V.34 mapping.

   Bit    Value                           Function

    0          0   8S-2D map enabled.

              1    8S-2D map disabled.

    1          0   16S-4D map enabled.

              1    16S-4D map disabled.

    2          0   32S-2D map enabled.

              1    32S-2D map disabled.

    3          0   64S-4D map enabled.

              1    64S-4D map disabled.

                               V.34 OPTIONS

  Type:            Register

  Format:          AT [cmds] S54=n [cmds]

  Default:         0

  Range:           0 - 255

  Description:     Controls V.34 baud rate, call indicate, and V.8.

   Bit    Value                           Function

    0          0   2400 baud rate enabled.

              1    2400 baud rate disabled.

    1          0   2743 baud rate enabled.

              1    2743 baud rate disabled.

    2          0   2800 baud rate enabled.

              1    2800 baud rate disabled.

    3          0   3000 baud rate enabled.

              1    3000 baud rate disabled.

    4          0   3200 baud rate enabled.

              1    3200 baud rate disabled.

    5          0   3429 baud rate enabled.

              1    3429 baud rate disabled.

    6          0   Call indicate during V.34 operation enabled.

              1    Call indicate during V.34 operation disabled.

    7          0   V.8 during V.34 operation enabled.

              1    V.8 during V.34 operation disabled.

                           XON/XOFF PASS-THROUGH

  Type:                 Configuration

  Format:               AT [cmds] &In [cmds]

  Description:          Selects whether XON/XOFF signals received from
                        the DTE are sent to the remote modem.

       Command                              Function

         &I0            Software flow control disabled.

         &I1            XON/XOFF passed through local modem.

         &I2            XON/XOFF signals trapped by local modem.

