
MEGAHERTZ CORPORATION

C524FM/Z324FM/Z524FM

Modem Type                  Data (synchronous/asynchronous)/Fax/Voice
Maximum Data Rate           2400bps
Maximum Fax Rate            9600bps
Data Bus                    Internal
Fax Class                   Class I & II
Data Modulation Protocol    Bell 103A/212A

                            ITU-T V.21, V.22, V.22bis
Fax Modulation Protocol     ITU-T V.21CH2, V.27ter, V.29
Error                       MNP5, V.42, V.42bis
Correction/Compression

                                                                      V1287

                         Proprietary AT Command Set

                           ACCEPT RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \U [cmds]

  Example:       AT \U B1<CR>

  Description:   Accepts remote modems request for reliable link.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Register

  Format:            AT [cmds] %An [cmds]

  Example:           AT %A20 <CR>

  Default:           Unidentified

  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

   \C0             Data is discarded.

  \C1               Data is buffered.

  \C2               Data is discarded, modem returns to normal mode on
                    receiving auto-reliable fallback character.

                               AUTO-RETRAIN

  Type:          Configuration

  Format:        AT %En

  Example:       AT %E1 <CR>

  Description:   Selects auto-retrain mode.

    Command                              Function

      %E0        Auto-retrain enabled.

      %E1        Auto-retrain disabled.

                          BIT-MAPPED REGISTER S14

  Format                  AT [cmds] S14=n [cmds]

  Example:                AT S14=170 <CR>

  Default:                170

  Range:                  0 - 190

  Unit:                   Bit-mapped

  Description:            Controls command echo, result codes, dialing
                          mode, and answer/originate mode.

      Bit         Value                        Function

       0            0        Not used.

       1             0       Command echo off.

                    1        Command echo on.

       2             0       Result codes enabled.

                    1        Result codes disabled.

       3             0       Numeric result codes.

                    1        Verbose result codes.

       4            1        Not used.

       5             0       Tone dialing selected.

                    1        Pulse dialing selected.

       6            0        Not used.

       7             0       Answer mode selected.

                    1        Originate mode selected.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 &W<CR>

  Range:         1-9

  Unit:          .1 second

  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        Break from DTE      Modem receives     Break received
                                             \B             from remote
                                                               modem

       \K0          Online command     Break sent to      Buffers
                    mode enabled,      remote modem and   cleared, break
                    send no break to   buffered           sent to DTE.
                    remote modem.      cleared.

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

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

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

       \K4          Online command     Send break with    Break sent with
                    mode enabled,      transmitted        received data
                    send no break to   data.              to the DTE.
                    remote modem.

       \K5          Send break with    Send break with    Break sent with
                    transmitted        transmitted        received data
                    data.              data.              to the DTE.

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Example:       AT *EC0 %C1 *AP0<CR>

  Description:   Selects data compression.

    Command                              Function

      %C0        Data compression disabled.

      %C1        Data compression enabled.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 DT555-1212<CR>

  Description:   Sets connect mode.

    Command                              Function

      \N1        Normal mode.

      \N0        Direct mode.

      \N2        Reliable mode.

      \N3        Auto-reliable mode.

                         CONVERT TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Y [cmds]

  Example:       AT \Y <CR>

  Description:   Initiates reliable mode link.

                         DIAL STORED PHONE NUMBER

  Type:          Immediate

  Format:        AT [cmds] Dn

  Example:       AT M0 D3 <CR>

  Description:   Dials a stored phone number.

                      DISPLAY CURRENT COMMAND STATUS

  Type:          Immediate

  Format:        AT [cmds] \S [cmds]

  Example:       AT &Z2=9W1-303-555-1212 \S<CR>

  Description:   Displays current setting of modem commands.

                          DISPLAY STORED NUMBERS

  Type:          Immediate

  Format:        AT [cmds] \F? [cmds]

  Example:       AT \P2=9W1-303-555-1212 \F?<CR>

  Description:   Displays all stored phone numbers.

                                 ECHO DATA

  Type:          Configuration

  Format:        AT [cmds] \En [cmds]

  \Example:      AT \E0 <CR>

  Description:   Enables modem to echo received data.

    Command                              Function

      \E0        Data echo disabled.

      \E1        Data echo enabled.

                           EXTENDED RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Example:       AT \V1 %C1<CR>

  Description:   Selects MNP result codes.

    Command                              Function

      \V0        MNP result codes disabled.

      \V1        MNP result codes 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

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q5 <CR>

  Description:   Sets type of flow control used by modem.

    Command                              Function

      \Q0        Flow control disabled.

      \Q1        Bidirectional XON/XOFF flow control enabled.

      \Q2        CTS flow control by DCE enabled.

      \Q3        Bidirectional CTS/RTS flow control enabled.

      \Q4        XON/XOFF flow control by DCE enabled.

                             INACTIVITY TIMER

  Type:             Register

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT \T5 <CR>

  Default:          0

  Range:            0-255

  Unit:             1 second

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

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT %L3 %B14 \J0 <CR>

  Description:   Sets operation of serial port speed.

    Command                              Function

      \J0        Serial speed locked.

      \J1        Serial speed follows connect speed.

                    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.

                               MODEM STATUS

  Type:          Immediate

  Format:        AT [cmds] \S [cmds]

  Example:       AT \S &W<CR>

  Description:   Display modem status.

                         ON-LINE IN RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \On

  Example:       AT \O <CR>

  Description:   Returns to on-line and requests reliable mode
                 connection.

                                  REDIAL

  Type:          Immediate

  Format:        AT [cmds] DL

  Example:       AT M1 DL <CR>

  Description:   Redials the last number dialed.

                          REPORT PRODUCT VERSION

  Type:          Immediate

  Format:        AT [cmds] %V [cmds]

  Example:       AT I3 &V1 %V <CR>

  Description:   Reports product version.

                          RETURN TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Z [cmds]

  Example:       AT \Z <CR>

  Description:   Ends reliable mode link, initiate return to normal mode.

                        STORE PHONE NUMBER IN NVRAM

  Type:          Configuration

  Format:        AT [cmds] \Pn=<#>

  Example:       AT \P2=9W1-303-555-1212 \F?<CR>

  Description:   Stores a phone number in the modems memory.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X0 O <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.

