
MULTI-TECH SYSTEMS, INC.

ISI3334/4, ISI3334/8, ISI3334/EC

Card Type                    Modem (asynchronous)
Processor Type               80186
Processor Speed              16MHz
Chip Set                     Unidentified
Maximum Onboard Memory       256KB RAM
Maximum Data Rate            33.6Kbps x 4 (8 with daughtercard)
Maximum Fax Rate             14.4Kbps x 4 (8 with daughtercard)
Data Bus                     16-bit ISA
Fax Class                    Class II
Data Modulation Protocol     Bell 103A/212A

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

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

[Image]

                                CONNECTIONS

        Function           Label             Function              Label

  Telephone line 1 out       J1      Telephone line 8 out           J8

  Telephone line 2 out       J2      Header to daughterboard        J9A
                                     J9B

  Telephone line 3 out       J3      Header to main board J9A       J9B

  Telephone line 4 out       J4      Header to daughterboard       J10A
                                     J10B

  Telephone line 5 out       J5      Header to main board J10A     J10B

  Telephone line 6 out       J6      Header to daughterboard       J11A
                                     J11B

  Telephone line 7 out       J7      Header to main board J11A     J11B

            Note: J5 through J8 will not be active unless the
            daughtercard is installed.

                        USER CONFIGURABLE SETTINGS

                  Setting                      Label         Position

  Daughtercard is not installed                 JP1         Pins 1 & 2
                                                              closed

  Daughtercard is installed                     JP1         Pins 2 & 3
                                                              closed

                                   INTERRUPT SELECTION

  Setting   JP2/A   JP2/B    JP2/C    JP2/D    JP2/E    JP2/F    JP2/G    JP2/H    JP2/I

    2       Closed   Open     Open     Open     Open    Open     Open     Open     Open

    3       Open    Closed    Open     Open     Open    Open     Open     Open     Open

    4       Open     Open    Closed    Open     Open    Open     Open     Open     Open

    5       Open     Open     Open    Closed    Open    Open     Open     Open     Open

    7       Open     Open     Open     Open    Closed   Open     Open     Open     Open

    10      Open     Open     Open     Open     Open    Closed   Open     Open     Open

    11      Open     Open     Open     Open     Open    Open     Closed   Open     Open

    12      Open     Open     Open     Open     Open    Open     Open     Closed   Open

    15      Open     Open     Open     Open     Open    Open     Open     Open     Closed

                        BASE I/O ADDRESS SELECTION

  Setting   SW1/1   SW1/2   SW1/3   SW1/4   SW1/5   SW1/6   SW1/7   SW1/8

   000h      On      On      On      On      On      On      On      On

   008h     Off      On      On      On      On      On      On      On

   010h      On     Off      On      On      On      On      On      On

   018h     Off     Off      On      On      On      On      On      On

   020h      On      On     Off      On      On      On      On      On

   200h      On      On      On      On      On      On     Off      On

   7D8h     Off     Off      On     Off     Off     Off     Off      Off

   7E0h      On      On     Off     Off     Off     Off     Off      Off

   7E8h     Off      On     Off     Off     Off     Off     Off      Off

   7F0h      On     Off     Off     Off     Off     Off     Off      Off

   7F8h     Off     Off     Off     Off     Off     Off     Off      Off

            Note: A total of 256 base address settings are available. The
            switches are a binary representation of the decimal memory
            addresses. SW1/8 is the Most Significant Bit and switch SW1/1
            is the Least Significant Bit. The switches have the following
            decimal values: SW1/8=1024, SW1/7=512, SW1/6=256, SW1/5=128,
            SW1/4=64, SW1/3=32, SW1/2=16, SW1/1=8. Turn off the switches
            and add the values of the switches that are off to obtain the
            correct memory address. (Off=1, On=0)

                   SUPPORTED STANDARD COMMANDS

                        Basic AT Commands

  +++, comma, A/

  A, B, D, E, H, O, P, T, V, W, X, Y, Z

  &D, &F, &G, &P, &S, &T, &W

                           S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S30

            Note: See MHI documentation for complete information.

                         Proprietary AT Command Set

                           ANSWER/ORIGINATE MODE

  Type:                 Configuration

  Format:               AT [cmds] Rn [cmds]

  Description:          Selects whether the modem will answer and
                        originate calls in normal or reversed mode.

        Command                             Function

          R0            Modem will answer calls in answer mode and
                        originate calls in originate mode.

          R1            Modem will answer calls in originate mode and
                        originate calls in answer mode.

                          AUTO-RELIABLE FALLBACK

  Type:               Configuration

  Format:             AT [cmds] $Fn [cmds]

  Description:        Selects whether error correction can be disabled by
                      a <CR> while handshaking.

      Command                              Function

        $F0           Auto-reliable fallback disabled.

        $F1           Auto-reliable fallback enabled.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:              Configuration

  Format:            AT [cmds] $An [cmds]

  Description:       Controls the handling of incoming data during
                     auto-reliable time period.

      Command                              Function

        $A0          Data is discarded.

        $A1          Data is buffered.

                               BREAK LENGTH

  Type:                Configuration

  Format:              AT [cmds] S17=n [cmds]

  Default:             250

  Range:               0 - 250

  Unit:                10 mS

  Description:         Sets the length of the break signal the modem will
                       send to the local serial port.

                                BUFFER SIZE

  Type:          Configuration

  Format:        AT [cmds] &Bn [cmds]

  Description:   Selects the modems transmit/receive buffer size.

    Command                              Function

      &B0        Normal buffer size.

      &B1        Small buffer size.

                                 CD SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Cn [cmds]

  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.

      &C4        Modem resets on low CD.

                             CLEAR DOWN SIGNAL

  Type:               Configuration

  Format:             AT [cmds] &CDn [cmds]

  Description:        Selects whether the modem will send a clear down
                      signal when disconnecting.

      Command                              Function

        &CD0          Modem will not send clear down signal.

        &CD1          Modem will send clear down signal.

                                COMMAND SET

  Type:          Configuration

  Format:        AT &Qn

  Description:   Selects standard Hayes or custom command sets.

    Command                              Function

      &Q0        Multi-Tech custom command set enabled.

      &Q1        Standard Hayes command set enabled.

                                COMPRESSION

  Type:          Configuration

  Format:        AT &En

  Description:   Selects data compression.

    Command                              Function

      &E14       Data compression disabled.

      &E15       Data compression enabled.

                             COMPRESSION MODE

  Type:          Configuration

  Format:        AT #Ln

  Description:   Selects active compression protocols.

    Command                              Function

      #L0        MNP and V.42 negotiation enabled.

      #L1        MNP negotiation enabled.

      #L2        V.42 negotiation enabled.

      #L3        V.42 enabled with no negotiation.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &Rn [cmds]

  Description:   Controls the behaviour of the CTS signal.

    Command                              Function

      &R0        CTS normal.

      &R1        CTS forced high in command mode.

      &R2        CTS forced low for 1 second during disconnect.

                                CTS SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &RFn [cmds]

  Description:   Selects the function of the CTS signal.

    Command                              Function

      &RF0       CTS follows RTS.

      &RF1       CTS normal.

                                DATA LENGTH

  Type:          Configuration

  Format:        AT [cmds] $EBn [cmds]

  Description:   Selects 10- or 11-bit mode.

    Command                              Function

      $EB0       Sets 10-bit mode.

      $EB1       Sets 11-bit mode.

                                DATA PARITY

  Type:          Configuration

  Format:        AT [cmds] #Pn [cmds]

  Description:   Sets the parity of the serial port.

    Command                              Function

      #P0        No parity.

      #P1        Odd parity.

      #P2        Even parity.

                              DATA PUMP TONE

  Type:             Configuration

  Format:           AT [cmds] $FCn [cmds]

  Description:      Selects whether the data pump will transmit a 5
                    second 2100Hz tone.

     Command                              Function

       $FC0         Data pump will not transmit tone.

       $FC1         Data pump will transmit tone.

                         DIAL STORED PHONE NUMBER

  Type:                   Immediate

  Format:                 AT [cmds] Na [Nb, Nc...]

  Description:            Dials stored phone number(s). If the first
                          number is busy, the modem will proceed to the
                          next number in the list.

                       DISCONNECT SIGNAL DROP - PBX

  Type:                   Register

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

  Default:                20

  Range:                  0 - 255

  Unit:                   50 ms

  Description:            Sets the time to drop the DTR, CTS, and DCD
                          signals on disconnect when modem is connected
                          to a PBX.

                           DISPLAY CONFIGURATION

  Type:          Immediate

  Format:        AT Ln

  Description:   Displays modem configuration.

    Command                              Function

       L5        Displays all settings.

       L6        Displays the values of all S-registers.

       L7        Displays extended parameters.

       L8        Displays current diagnostics.

       L9        Displays current signal strength.

      L10        Displays current signal-to-noise ratio.

      L11        Displays current noise level.

                            DISPLAY INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested about the modem.

    Command                              Function

       I0        Displays product identification code.

       I1        Displays firmware revision.

       I2        Displays product name.

       I3        Factory use only.

       I5        Displays DSP chip version.

       I9        Displays modem features.

                                DSR SIGNAL

  Type:          Configuration

  Format:        AT [cmds] &SFn [cmds]

  Description:   Selects the function of the DSR signal.

    Command                              Function

      &SF0       DSR is set to CD.

      &SF1       DSR is independent of CD.

                                DTR DIALING

  Type:          Configuration

  Format:        AT [cmds] $Dn [cmds]

  Description:   Selects the DTR dialing function.

    Command                              Function

      $D0        DTR dialing disabled.

      $D1        DTR dialing enabled.

                              DTR SIGNAL DROP

  Type:                 Register

  Format:               AT [cmds] S25=n [cmds]

  Default:              0

  Range:                0 - 255

  Unit:                 100 ms

  Description:          Sets the time to drop the DTR signal on
                        disconnect. A value of 0 sets this to 50 mS.

                        ESCAPE SEQUENCE BUFFER SIZE

  Type:                 Register

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

  Default:              10

  Range:                0-60

  Unit:                 1 byte

  Description:          Sets the size of the buffer used to store entered
                        commands during an escape sequence.

                         ESCAPE SEQUENCE RESPONSE

  Type:            Configuration

  Format:          AT [cmds] %En [cmds]

  Description:     Sets the response that the modem will give to an
                   escape sequence.

       %E4         OK response to command escape disabled.

       %E5         OK response to command escape enabled.

                          ESCAPE SEQUENCE TIMEOUT

  Type:                   Register

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

  Default:                20

  Range:                  0-255

  Unit:                   1 second

  Description:            Sets the maximum amount of time the modem will
                          wait for a <CR> while executing an escape
                          sequence.

                           ESCAPE SEQUENCE TYPE

  Type:            Configuration

  Format:          AT [cmds] %En [cmds]

  Description:     Sets the type of command escape sequence the modem
                   will recognise.

     Command                              Function

       %E0         Command escape disabled.

       %E1         TIES escape (+++AT...)

       %E2         <BREAK> AT method.

       %E3         Both TIES and BREAK methods.

                               FALLBACK MODE

  Type:           Configuration

  Format:         AT [cmds] #Fn [cmds]

  Description:    Sets direction of fallback.

    Command                              Function

      #F0         Fallback disabled.

      #F1         Fallback from 33.6Kbps to 2400bps as line quality
                  degrades.

      #F2         Fallback from 2400bps to 33.6Kbps as line quality
                  improves.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects flow control.

    Command                              Function

      &E12       Flow control disabled.

      &E13       Flow control enabled.

                          FLOW CONTROL - ENQ/ACK

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects ENQ/ACK pacing.

    Command                              Function

      &E8        Enables ENQ/ACK pacing.

      &E9        Disables ENQ/ACK pacing.

                        FLOW CONTROL IN NORMAL MODE

  Type:             Configuration

  Format:           AT [cmds] &En [cmds]

  Description:      Selects XON/XOFF flow control for
                    non-error-correcting connections.

     Command                              Function

       &E10         XON/XOFF disabled for non-error-correcting
                    connections.

       &E11         XON/XOFF enabled for non-error-correcting
                    connections.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Sets type of flow control used by modem.

    Command                              Function

      &E3        Flow control disabled.

      &E4        CTS/RTS flow control enabled.

      &E5        XON/XOFF flow control enabled.

                            HANDSHAKE ATTEMPTS

  Type:                  Configuration

  Format:                AT [cmds] #An [cmds]

  Description:           Configures the initial handshake phase.

        Command                              Function

          #A0            Attempts speeds in order: 33.6Kbps, 31.2Kbps,
                         28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps,
                         14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps,
                         1200bps, 300bps.

          #A1            Attempts only 33.6Kbps.

          #A2            Attempts speeds in order: 33.6Kbps, 31.2Kbps,
                         28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps,
                         14.4Kbps, 12Kbps, 9600bps, 4800bps.

          #A3            Attempts speeds in order: 2400bps, 1200bps,
                         300bps.

                               HELP SCREENS

  Type:          Immediate

  Format:        AT $Hn

  Description:   Shows modem help screens.

    Command                              Function

      $H1        Shows help screen 1.

      $H2        Shows help screen 2.

      $H3        Shows help screen 3.

                          LOCAL SERIAL PORT SPEED

  Type:          Configuration

  Format:        AT [cmds] $SBnnn [cmds]

  Description:   Sets serial port speed.

    Command                              Function

     $SB300      Sets 300bps speed.

    $SB1200      Sets 1200bps speed.

    $SB2400      Sets 2400bps speed.

    $SB4800      Sets 4800bps speed.

    $SB9600      Sets 9600bps speed.

    $SB19200     Sets 19.2Kbps speed.

    $SB38400     Sets 38.4Kbps speed.

    $SB57600     Sets 57.6Kbps speed.

   $SB115200     Sets 115.2Kbps speed.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] $BAn [cmds]

  Description:   Sets operation of serial port speed.

    Command                              Function

      $BA0       Serial speed locked at rate set by $SB.

      $BA1       Serial speed follows connect speed, ignoring $SB.

                              LOGIN PASSWORD

  Type:                  Configuration

  Format:                AT [cmds] #Ixxxx

  Description:           Sets the login password to xxxx. The password
                         must be between 6 and 10 characters, case
                         sensitive. It defaults to MULTI-TECH.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:                Configuration

  Format:              AT [cmds] &BSn [cmds]

  Description:         Sets the maximum transmittable block size for data
                       compression modes.

       Command                              Function

        &BS0           Maximum block size is 64 characters.

        &BS1           Maximum block size is 256 characters in MNP mode
                       and 128 characters in LAPM mode.

                            MAXIMUM LINE SPEED

  Type:                Configuration

  Format:              AT $MBnnn

  Description:         Sets the maximum allowable data exchange rate
                       attempted during handshake process.

       Command                              Function

        $MB75          Sets V.23 (1200bps/75bps bi-directional).

       $MB300          Sets 300bps maximum connect speed.

       $MB1200         Sets 1200bps maximum connect speed.

       $MB2400         Sets 2400bps maximum connect speed.

       $MB4800         Sets 4800bps maximum connect speed.

       $MB9600         Sets 9600bps maximum connect speed.

      $MB14400         Sets 14.4Kbps maximum connect speed.

      $MB19200         Sets 19.2Kbps maximum connect speed.

      $MB28800         Sets 28.8Kbps maximum connect speed.

      $MB33600         Sets 33.6Kbps maximum connect speed.

                                  REDIAL

  Type:           Immediate

  Format:         A:

  Description:    Redials the last number dialed until it is no longer
                  busy.

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

                      REMOTE CONFIGURATION CHARACTER

  Type:                  Register

  Format:                AT [cmds] S13=n [cmds]

  Default:               37

  Range:                 0 - 127

  Unit:                  1 ASCII character

  Description:           Defines the character that, when sent four times
                         within the guard time set by S12, will notify
                         the remote modem that a remote configuration
                         session has been requested.

                               RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] Qn [cmds]

  Description:   Enables modem to send result codes to the DTE.

    Command                              Function

       Q0        Result codes enabled.

       Q1        Result codes disabled.

       Q2        Dumb answer mode enabled.

                          RETRANSMIT FAIL ACTION

  Type:          Configuration

  Format:        AT [cmds] $Rn [cmds]

  Description:   Sets whether the modem gives up on a bad connection.

    Command                              Function

      $R0        Hang up after 12 failed retransmissions.

      $R1        Do not hang up after 12 failed retransmissions.

                              SETUP PASSWORD

  Type:                  Configuration

  Format:                AT [cmds] #Sxxxx

  Description:           Sets the setup password to xxxx. The password
                         must be between 6 and 10 characters, case
                         sensitive. It defaults to MODEMSETUP.

                                TEST MODES

  Type:          Immediate

  Format:        AT [cmds] Un [cmds]

  Description:   Performs test modes.

    Command                              Function

       U0        Begin local analog loopback test in originate mode.

       U1        Begin local analog loopback test in answer mode.

       U2        Request remote digital loopback

       U3        Begin local digital loopback.

                      TIME UNTIL OFF HOOK ON HIGH DTR

  Type:                 Register

  Format:               AT [cmds] S37=n [cmds]

  Default:              0

  Range:                0-255

  Unit:                 1 second

  Description:          Sets the amount of time the modem will wait to
                        pick up after the DTR signal goes high.

                       TIME UNTIL ON HOOK ON LOW DTR

  Type:                 Register

  Format:               AT [cmds] S36=n [cmds]

  Default:              0

  Range:                0-255

  Unit:                 1 second

  Description:          Sets the amount of time the modem will wait to
                        hang up after the DTR signal goes low.

                              TRELLIS CODING

  Type:          Configuration

  Format:        AT [cmds] #Tn [cmds]

  Description:   Selects whether the modem will use trellis coding.

    Command                              Function

      #T0         Trellis coding disabled.

      #T1         Trellis coding enabled.

                             V.32terbo CONTROL

  Type:          Configuration

  Format:        AT [cmds] #Vn [cmds]

  Description:   Controls the V.32terbo protocol in answer mode.

    Command                              Function

      #V0        V.32terbo enabled.

      #V1        V.32terbo disabled.

                              V.34 LINE PROBE

  Type:                  Configuration

  Format:                AT [cmds] %DPn [cmds]

  Description:           Selects whether the modem will read line probe
                         information from the DSP chip during
                         handshaking.

        Command                              Function

          %DP0           Line probe information not read during
                         handshaking.

          %DP1           Line probe information read during handshaking.

                         V.34 LINE PROBE - DISPLAY

  Type:          Immediate

  Format:        AT [cmds] %DFn [cmds]

  Description:   Displays V.34 line probe data.

    Command                              Function

      %DF0        Displays V.34 line probe data in graph format.

      %DF1        Displays V.34 line probe data in table format.

                         V.34 - MAXIMUM LINE SPEED

  Type:                 Register

  Format:               AT [cmds] S48=n [cmds]

  Description:          Sets the maximum line speed the modem will
                        attempt to connect at when in V.34 mode.

       Command                              Function

        S48=0           Modem will attempt to connect at 33.6Kbps.

        S48=4           Modem will attempt to connect at 4800bps.

        S48=9           Modem will attempt to connect at 9600bps.

        S48=12          Modem will attempt to connect at 12Kbps.

        S48=14          Modem will attempt to connect at 14.4Kbps.

        S48=16          Modem will attempt to connect at 16.8Kbps.

        S48=19          Modem will attempt to connect at 19.2Kbps.

        S48=21          Modem will attempt to connect at 21.6Kbps.

        S48=26          Modem will attempt to connect at 26.4Kbps.

        S48=28          Modem will attempt to connect at 28.8Kbps.

        S48=31          Modem will attempt to connect at 31.2Kbps.

        S48=33          Modem will attempt to connect at 33.6Kbps.

                           V.42 FAILURE REACTION

  Type:           Configuration

  Format:         AT [cmds] &En [cmds]

  Description:    Sets the modem's reaction if it fails to connect with
                  V.42.

    Command                              Function

      &E0         Error correction disabled.

      &E1         Modem will fall back to normal mode.

      &E2         Modem will not fall back to normal mode.

                                 XOFF SEND

  Type:          Configuration

  Format:        AT [cmds] #Xn [cmds]

  Description:   Selects how XOFF signal is sent.

    Command                              Function

      #X0        Single XOFF character are sent until the DTE responds.

      #X1        Multiple XOFF characters are sent until the DTE
                 responds.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] &En [cmds]

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem.

    Command                              Function

      &E6        XON/XOFF signals trapped by local modem.

      &E7        XON/XOFF passed through local modem.

