
E-TECH RESEARCH, INC.

E288MX (REV. 1.1)

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

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

         Purpose             Location          Purpose           Location

  Line out                     CN1       DC power                  CN4

  Line in                      CN2       Volume                    R1

  RS-232/422                   CN3       Power switch              SW1

                            DIAGNOSTIC LED(S)

     LED        Color        Status                Condition

     TD          Red           On           DTE is transmitting data

     TD          Red          Off         DTE is not transmitting data

     RD          Red           On           Modem is receiving data

     RD          Red          Off         Modem is not receiving data

     DTR         Red           On              DTR signal is high

     DTR         Red          Off              DTR signal is low

     CTS         Red           On              CTS signal is high

     CTS         Red          Off              CTS signal is low

     DCD         Red           On           Carrier signal detected

     DCD         Red          Off         Carrier signal not detected

     OH          Red           On              Modem is off-hook

     OH          Red          Off               Modem is on-hook

     AA          Red           On             Auto-answer enabled

     AA          Red          Off             Auto-answer disabled

     AA          Red        Blinking            Phone is ringing

     LL          Red           On         Operating in lease-line mode

     LL          Red          Off       Not operating in Lease-line mode

     PWR         Red           On                 Power is on

     PWR         Red          Off                 Power is off

                             JUMPER SELECTION

      Function            JP6          JP7           JP8          JP9

      Switched           Open        Not used     Not used       Closed

     Lease Line -       Closed         Open        Closed         Open
     originating

     Lease Line -       Closed        Closed       Closed         Open
      answering

                         Proprietary AT Command Set

                        AUTO FALL FORWARD/FALLBACK

  Type:          Configuration

  Format:        AT [cmds] %Gn [cmds]

  Example:       AT %G1 &W <CR>

  Description:   Selects auto fallback.

    Command                              Function

      %G0        Fallback disabled.

   %G1          Fallback enabled.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Configuration

  Format:            AT [cmds] %An [cmds]

  Example:           AT%A20<CR>

  Default:           13

  Range:             0-127

  Unit:              ASCII

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

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:            Configuration

  Format:          AT [cmds] \Cn [cmds]

  Example:         AT \C1 &W<CR>

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

     Command                              Function

   \CO            Data is discarded.

       \C1         Data is buffered.

       \C2         Data is discarded, sets to normal mode and sends
                   auto-reliable character to serial port.

                             AUTO SLEEP TIMER

  Type:                   Register

  Format                  AT [cmds] S46=n [cmds]

  Example:                AT S46= 100<CR>

  Default:                255

  Range:                  0 - 255

  Unit:                   .1 second

  Description:            Maximum duration of DTE and DCE inactivity
                          allowed prior to initiating low-power sleep
                          mode.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 &W<CR>

  Range:         0 - 9

  Unit:          100 ms

  Description:   Sends break to modem.

                                BREAK TYPE

  Type:            Configuration

  Format:          AT [cmds] \Kn [cmds]

  Example:         AT \K1 <CR>

  Description:     Configures action of break signal.

     Command          In normal or     In direct mode,     Break received
                     reliable mode,    break from DTE       from remote
                    break from DTE                             modem

       \K0          Online command     Send break         Buffers
                    mode enabled,      immediately and    cleared, break
                    send no break to   enter command      sent to remote
                    remote modem.      state.             modem.

       \K1          Break sent to      Send break to      Buffers
                    remote modem and   remote modem       cleared, break
                    buffered           immediately.       sent to remote
                    cleared.                              modem.

       \K2          Online command     Send break         Break sent
                    mode enabled,      immediately and    immediately to
                    send no break to   enter command      DTE.
                    remote modem.      state.

       \K3          Send break to      Send break to      Break sent
                    remote modem       remote modem       immediately to
                    immediately.       immediately.       DTE.

       \K4          Online command     Send break         Break sent to
                    mode enabled,      immediately and    remote modem
                    send no break to   enter command      when data
                    remote modem.      state.             received.

       \K5          Send break with    Send break to      Break sent to
                    transmitted        remote modem       remote modem
                    data.              immediately.       when data
                                                          received.

                                COMMAND SET

  Type:          Configuration

  Format:        AT [cmds] %Vn [cmds]

  Example:       AT %V0 &W<CR>

  Description:   Selects V.25bis or AT command sets.

    Command                              Function

   %V0          AT command set enabled.

      %V1        V.25bis command set enabled.

                                COMPRESSION

  Type:          Configuration

  Format:        AT %Cn

  Example:       AT *EC0 %C3 *AP0<CR>

  Description:   Contols data compression.

    Command                              Function

      %C0        Data compression disabled.

      %C1        MNP 5 enabled.

      %C2        V.42bis enabled.

   %C3          MNP 5 and V.42bis enabled.

                         DATA COMPRESSION CONTROL

  Type:          Configuration

  Format:        AT [cmds] $Cn [cmds]

  Example:       AT $C1 &W<CR>

  Description:   Controls data compression.

    Command                              Function

      $C0        Data compression disabled.

   $C1          MNP 5 and V.42bis enabled.

                             DIAL STORE NUMBER

  Type:          Configuration

  Format:        AT [cmds] DSn [cmds]

  Example:       AT DS1 &W<CR>

  Description:   Dial stored number

  Note: n = 0 - 3, only three phone numbers can be in the nonvolatile
  memory.

                              DTE RATE STATUS

  Type:          Register

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

  Example:       AT S62=16 <CR>

  Description:   Selects DTE rate.

    Command                              Function

       0         300bps.

       1         600bps.

       2         1200bps.

       3         2400bps.

       4         4800bps.

       5         7200bps.

       6         9600bps.

       7         12Kbps.

       8         14.4Kbps.

       9         16.8Kbps.

       10        19.2Kbps.

       11        21.6Kbps.

       12        24Kbps.

       13        26.4Kbps.

       14        28.8Kbps.

       15        38.4Kbps.

   16           57.6Kbps.

       17        115.2Kbps.

                             DTE SPEED OPTION

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT \J0 &W<CR>

  Description:   Controls the speed of the DTE.

    Command                              Function

   \J0          DCE and DTE rates are independent.

      \J1        DTE rate adjusts to DCE rate after connection.

                         ERROR CORRECTION CONTROL

  Type:          Configuration

  Format:        AT [cmds] $En [cmds]

  Example:       AT $E3 &W<CR>

  Description:   Selects error correction mode.

    Command                              Function

      $E0        Normal mode.

      $E1        MNP auto-reliable mode.

      $E2        MNP reliable mode.

   $E3          LAPM, MNP, or normal reliable mode.

      $E4        LAPM mode reliable mode only.

                               FAX/DATA MODE

  Type:          Register

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

  Example:       AT S50=0 &W<CR>

  Description:   Choose data or FAX mode.

    Command                              Function

   0            Data mode enabled.

       1         FAX mode enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT \G1 &K3<CR>

  Description:   Selects modem port flow control.

    Command                              Function

      \G0        Flow control disabled.

      \G1        Flow control enabled.

                               FLOW CONTROL

     Type:       Configuration

    Format:      AT [cmds] $Fn [cmds]

    Example:     AT $F4 A<CR>

  Description:   Select flow control used by modem.

    Command                              Function

      $F0        XON/XOFF software flow control enabled.

      $F1        XON/XOFF pass-through flow control enabled.

      $F4        Hardware CTS/RTS flow control enabled.

      $F5        Flow control disabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q2<CR>

  Description:   Sets type of flow control used by modem.

    Command                              Function

      \Q0        Flow control disabled.

      \Q1        XON/XOFF software flow control enabled.

      \Q2        CTS flow control by DCE enabled.

   \Q3          CTS/RTS hardware flow control enabled.

                              IDENTIFICATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Example:       AT I3 &W<CR>

  Description:   Displays several options.

    Command                              Function

       I0        Display product - identification code.

       I2        Display ROM checksum.

       I3        Display firmware version.

       I4        Display OEM string.

       I5        Display country code.

       I9        Display ROM checksum.

                             INACTIVITY TIMER

  Type:             Register

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T20<CR>

  Default:          Unidentified.

  Range:            1-90

  Unit:             1 minute

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

  Note:             \T0 will disable inactivity timer.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Example:       AT \A3 %C1<CR>

  Description:   Sets the maximum transmittable block size.

    Command                              Function

      \A0        Maximum MNP block size is 64 characters.

      \A1        Maximum MNP block size is 128 characters.

      \A2        Maximum MNP block size is 192 characters.

   \A3          Maximum MNP block size is 256 characters.

      \A4        Maximum MNP block size is 32 characters.

                              MODEM PROTOCOL

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 DT555-1212<CR>

  Description:   Sets connect mode.

    Command                              Function

      \N0        Normal mode enabled.

      \N1        Direct mode enabled.

      \N2        MNP reliable mode enabled.

   \N3          MNP, LAP-M, or normal mode enabled.

      \N4        LAP-M or MNP reliable enabled.

      \N5        LAP-M reliable mode enabled.

                       POOR SIGNAL QUALITY REACTION

  Type:             Configuration

  Format:           AT [cmds] %En [cmds]

  Example:          AT %E0<CR>

  Description:      Configures the modems reaction to poor signal
                    quality.

     Command                              Function

       %E0          Modem will disconnect during poor signal quality.

   %E1             Modem retrains during poor signal quality, disconnect
                    if threshold set in S37 is exceeded.

       %E2          Modem does nothing during poor signal quality.

                           PROTOCOL RESULT CODE

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Example:       AT \V0 Q0 <CR>

  Description:   \V responds when conjunction with W0 and W2 commands.

    Command                              Function

      \V1        Protocol result code disabled.

   \V0          Protocol result code enabled.

                              PROTOCOL/SPEED

  Type:          Register

  Format:        AT [cmds] S37n [cmds]

  Example:       AT S37=0 <CR>

  Description:   Selects the current DCE speed.

    Command                              Function

       0         Select last AT speed.

       3         Select 300bps speed.

       5         Select 1200bps speed.

       6         Select 2400bps speed.

       7         Select 4800bps speed.

       8         Select 7200bps speed.

       9         Select 9600bps speed.

       10        Select 12Kbps speed.

       11        Select 14.4Kbps speed.

       12        Select 16.8Kbps speed.

       13        Select 19.2Kbps speed.

       14        Select 21.6Kbps speed.

       15        Select 24Kbps speed.

       16        Select 26.4Kbps speed.

       17        Select 28.8Kbps speed.

                             ROUND TRIP DELAY

  Type:          Register

  Format:        AT [cmds] S65=n [cmds]

  Example:       AT S65=1 <CR>

  Default:       Unidentified

  Range:         Unidentified

  Unit:          100 ms

  Description:   Sets the round trip delay.

                           V.42 DETECTION PHASE

  Type:          Configuration

  Format:        AT [cmds] -Jn [cmds]

  Example:       AT -J1 &W<CR>

  Description:   Controls V.42 detection.

    Command                              Function

      -J0        V.42 detection disabled.

   -J1          V.42 detection enabled.

                            V42bis COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] "Hn [cmds]

  Example:       AT "H3 &W<CR>

  Description:   Controls V.42bis compression.

    Command                              Function

      "H0        V.42bis disabled.

      "H1        V.42bis while transmit enabled.

      "H2        V.42bis while receiving enabled.

   "H3          V.42bis during transmitting and receiving enabled.

                          V.42bis DICTIONARY SIZE

  Type:          Configuration

  Format:        AT [cmds] "Nn [cmds]

  Example:       AT "N2 &W<CR>

  Description:   Controls V.42 dictionary size.

    Command                              Function

      "N0        512 bytes.

      "N1        1024 bytes.

   "N2          1536 bytes.

                       V.42bis MAXIMUM STRING LENGTH

  Type:          Immediate

  Format:        AT [cmds] "On [cmds]

  Example:       AT "O32 <CR>

  Default:       32

  Range:         6 - 64

  Unit:          Unidentified

  Description:   Selects string size for V.42bis compression.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X0 <CR>

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

    Command                              Function

   \X0          XON/XOFF signals trapped by local modem.

      \X1        XON/XOFF passed through local modem.

                      Proprietary V.25bis Command Set

                             COMMAND SET - AT

  Type:          Immediate

  Format:        CNL[cmds]

  Example:       CNL%V0<CR>

  Description:   Execute an AT command.

                          REQUEST LISTED NUMBERS

  Type:             Immediate

  Format:           RLN

  Example:          RLN<CR>

  Description:      Requests the modem to return the list of stored
                    numbers. If no numbers are stored, the modem will
                    return LSN.

                            STORED NUMBERS LIST

  Type:                 Result code

  Format:               LSNxxxx

  Example:              LSN 443-3388

  Description:          Displays stored numbers. xxxx may specify a
                        memory location, phone number, or status. If no
                        code was specified with RLN, all stored numbers
                        are displayed.

