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# 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 Bell 103A/212A
Protocol
ITU-T V.21, V.22, V.22bis
Fax Modulation ITU-T V.21CH2, V.27ter, V.29
Protocol
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 modem’s 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 | Modem | Break |
| | DTE | receives \B | received |
| | | | from remote |
| | | | modem |
|---------------+---------------+--------------+-------------|
| \K0 | Online | Break sent | Buffers |
| | command mode | to remote | cleared, |
| | enabled, send | modem and | break sent |
| | no break to | buffered | to DTE. |
| | remote modem. | cleared. | |
|---------------+---------------+--------------+-------------|
| \K1 | Break sent to | Break sent | Buffers |
| | remote modem | to remote | cleared, |
| | and buffered | modem and | break sent |
| | cleared. | buffered | to DTE. |
| | | cleared. | |
|---------------+---------------+--------------+-------------|
| \K2 | Online | Send break | Break sent |
| | command mode | to remote | immediately |
| | enabled, send | modem | to DTE. |
| | no break to | immediately. | |
| | remote modem. | | |
|---------------+---------------+--------------+-------------|
| \K3 | Send break to | Send break | Break sent |
| | remote modem | to remote | immediately |
| | immediately. | modem | to DTE. |
| | | immediately. | |
|---------------+---------------+--------------+-------------|
| \K4 | Online | Send break | Break sent |
| | command mode | with | with |
| | enabled, send | transmitted | received |
| | no break to | data. | data to the |
| | remote modem. | | DTE. |
|---------------+---------------+--------------+-------------|
| \K5 | Send break | Send break | Break sent |
| | with | with | 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 modem’s |
| | 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. |
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