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# BEST DATA PRODUCTS, INC.
MACH 2 56K
Card Type Modem (asynchronous)
Chipset Unidentified
Maximum Data Rate 56Kbps
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
U.S. Robotics x2
Fax Modulation ITU-T V.17, V.27ter, V.29
Error MNP5, V.42, V.42bis
Correction/Compression
Fax Class Class I & II
Data Bus 16-bit ISA
Card Size Full height, half length
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| Telephone line out | CN1 | Telephone line in | CN2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED STANDARD COMMANDS |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| +++, ‘comma’, A/ |
|------------------------------------------------------------|
| A, B, E, F, H, L, M, O, P, T, V, X, Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &P, &R, &S, &T, &W, &Z |
|------------------------------------------------------------|
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| UNIDENTIFIED COMMANDS |
|------------------------------------------------------------|
| Command | Default |
|------------------------------+-----------------------------|
| S31 | 128 |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S13 |
|------------------------------------------------------------|
| Format | AT [cmds] S13=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 159 |
|--------------+---------------------------------------------|
| Description: | Controls DTR reset, DTR dialing, reset |
| | dialing, and MNP3. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | DTR normal. |
| | | |
| | 1 | Reset on low DTR. |
|------+-------+---------------------------------------------|
| 1 | í 0 | Non-error-correcting mode transmit buffer |
| | | set to 1.5KB. |
| | 1 | |
| | | Non-error-correcting mode transmit buffer |
| | | set to 128 bytes. |
|------+-------+---------------------------------------------|
| 2 | í 0 | Backspace and delete keys normal. |
| | | |
| | 1 | Backspace and delete keys reversed. |
|------+-------+---------------------------------------------|
| 3 | í 0 | DTR dialing disabled. |
| | | |
| | 1 | DTR dialing enabled. |
|------+-------+---------------------------------------------|
| 4 | í 0 | Reset dialing disabled. |
| | | |
| | 1 | Reset dialing enabled. |
|------+-------+---------------------------------------------|
| 6, 5 | 00 | Not used. |
|------+-------+---------------------------------------------|
| 7 | í 0 | Modem enters command state when +++ is |
| | | received. |
| | 1 | |
| | | Modem disconnects and enters command state |
| | | when +++ is received. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S15 |
|------------------------------------------------------------|
| Format: | AT [cmds] S15=n [cmds] |
|----------------+-------------------------------------------|
| Default: | 0 |
|----------------+-------------------------------------------|
| Range: | 0 - 255 |
|----------------+-------------------------------------------|
| Description: | Controls error correction and compression |
| | in selected protocols, MNP modes, and |
| | V.42 operation. |
|------------------------------------------------------------|
| Bit | Value | Function |
|---------+-------+------------------------------------------|
| 0 | í 0 | Error correction/compression enabled in |
| | | V.22 mode. |
| | 1 | |
| | | Error correction/compression disabled in |
| | | V.22 mode. |
|------------------------------------------------------------|
| 1 | í | Error correction/compression enabled in |
| | 0 | V.22bis mode. |
| | | |
| | 1 | Error correction/compression disabled |
| | | in V.22bis mode. |
|-------------+----+-----------------------------------------|
| 2 | í | Error correction/compression enabled in |
| | 0 | V.32 and V.32bis modes. |
| | | |
| | 1 | Error correction/compression disabled |
| | | in V.32 and V.32bis modes. |
|-------------+----+-----------------------------------------|
| 3 | í | MNP handshake enabled. |
| | 0 | |
| | | MNP handshake disabled. |
| | 1 | |
|-------------+----+-----------------------------------------|
| 4 | í | MNP4 disabled. |
| | 0 | |
| | | MNP4 enabled. |
| | 1 | |
|-------------+----+-----------------------------------------|
| 5 | í | MNP3 disabled. |
| | 0 | |
| | | MNP3 enabled. |
| | 1 | |
|-------------+----+-----------------------------------------|
| 6 | í | MNP operation normal |
| | 0 | |
| | | MNP configured for non-compatible |
| | 1 | modems. |
|-------------+----+-----------------------------------------|
| 7 | í | V.42 enabled. |
| | 0 | |
| | | V.42 disabled. |
| | 1 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format: | AT [cmds] S27=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 191 |
|--------------+---------------------------------------------|
| Description: | Controls V.21/Bell 103A, V.32 encoding and |
| | modulation, V.32bis modulation, V.42 answer |
| | tone and selective reject, and 9600 result |
| | codes. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Bell 103A enabled. |
| | | |
| | 1 | V.21 enabled. |
|------+-------+---------------------------------------------|
| 1 | í 0 | V.32 trellis coding enabled. |
| | | |
| | 1 | V.32 trellis coding disabled. |
|------+-------+---------------------------------------------|
| 2 | í 0 | V.32 modulation enabled. |
| | | |
| | 1 | V.32 modulation disabled. |
|------+-------+---------------------------------------------|
| 3 | í 0 | 2100Hz answer tone enabled. |
| | | |
| | 1 | 2100Hz answer tone disabled. |
|------+-------+---------------------------------------------|
| 4 | í 0 | Fallback to V.23 disabled. |
| | | |
| | 1 | Fallback to V.23 enabled. |
|------+-------+---------------------------------------------|
| 5 | í 0 | V.32bis modulation enabled. |
| | | |
| | 1 | V.32bis modulation disabled. |
|------+-------+---------------------------------------------|
| 6 | 0 | Not used. |
|------+-------+---------------------------------------------|
| 7 | í 0 | Actual result codes displayed. |
| | | |
| | 1 | Force 9600 result codes. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S32 |
|------------------------------------------------------------|
| Format: | AT [cmds] S32=n [cmds] |
|-----------------+------------------------------------------|
| Default: | 0 |
|-----------------+------------------------------------------|
| Range: | 0 - 59 |
|-----------------+------------------------------------------|
| Description: | Controls V.8 protocol and options, and |
| | V.34 and x2 modulation protocols. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+-------+-----------------------------------------|
| 0 | í 0 | V.8 Call Indicate disabled. |
| | | |
| | 1 | V.8 Call Indicate enabled. |
|----------+-------+-----------------------------------------|
| 1 | 0 | V.8 disabled. |
| | | |
| | í 1 | V.8 enabled. |
|------------------------------------------------------------|
| 2 | 0 | Not used. |
|--------------+----+----------------------------------------|
| 3 | í | V.34 modulation enabled. |
| | 0 | |
| | | V.34 modulation disabled. |
| | 1 | |
|--------------+----+----------------------------------------|
| 4 | í | V.34 modulation at 31.2Kbps and |
| | 0 | 33.6Kbps enabled. |
| | | |
| | 1 | V.34 modulation at 31.2Kbps and |
| | | 33.6Kbps disabled. |
|--------------+----+----------------------------------------|
| 5 | í | U.S. Robotics x2 modulation enabled. |
| | 0 | |
| | | U.S. Robotics x2 modulation disabled. |
| | 1 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK LENGTH |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S21=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 10 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | 10 ms |
|--------------+---------------------------------------------|
| Description: | Sets the length of error correction 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. |
|--------------+---------------------------------------------|
| í &Y1 | Break empties buffer and is sent |
| | immediately. |
|--------------+---------------------------------------------|
| &Y2 | Break does not empty buffer and is sent |
| | immediately. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| í &K1 | Auto-detect compression mode. |
|--------------+---------------------------------------------|
| &K2 | Data compression enabled. |
|--------------+---------------------------------------------|
| &K3 | MNP5 data compression only enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION SPEED LOWER LIMIT (CON'T) |
|------------------------------------------------------------|
| Command | Function |
|------------+-----------------------------------------------|
| &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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| &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. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#>;[cmds] |
|--------------+---------------------------------------------|
| Description: | Dials the telephone number indicated |
| | according to any modifiers included in the |
| | string. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DL | Re-dial last number. |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled. |
|--------------+---------------------------------------------|
| DR | Answer mode enabled; originate mode |
| | disabled following handshake initiation. |
|--------------+---------------------------------------------|
| DSn | Dial stored telephone number n. |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled. |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection. |
|--------------+---------------------------------------------|
| D, | Dialing paused for amount of time specified |
| | in S8 register. |
|--------------+---------------------------------------------|
| D/ | Dialing paused for 1/8 second. |
|--------------+---------------------------------------------|
| D! | Flash function initiated. Modem commanded |
| | to go off-hook for specified time before |
| | returning on-hook. |
|--------------+---------------------------------------------|
| D@ | Wait for Quiet Answer function enabled. |
| | Modem waits until a "quiet answer," a |
| | ring-back signal followed by silence up to |
| | the time specified in S7, is received prior |
| | to executing the rest of the dial string. |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY HELP SCREEN - AMPERSAND |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the help screen on the AT& |
| | commands. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY HELP SCREEN - BASIC |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the basic help screen. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY HELP SCREEN - DIAL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the help screen on the dialing |
| | commands. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY HELP SCREEN - REGISTERS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S$ [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the help screen for S registers. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 link diagnostics. |
|--------------+---------------------------------------------|
| I7 | Displays product configuration. |
|--------------+---------------------------------------------|
| I10 | Displays virtual device driver |
| | configuration. |
|--------------+---------------------------------------------|
| I11 | Displays current connection’s statistics |
| | for V.34 mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction protocols. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &M0 | Normal mode only. |
|--------------+---------------------------------------------|
| í &M4 | Auto-detect mode. |
|--------------+---------------------------------------------|
| &M5 | Error correction mode only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &An [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects extended result codes. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &A0 | Extended result codes disabled. |
|--------------+---------------------------------------------|
| &A1 | Error correction result codes enabled. |
|--------------+---------------------------------------------|
| &A2 | V.32 result code enabled. |
|--------------+---------------------------------------------|
| í &A3 | Error correction and compression result |
| | codes enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 - MODEM-TO-MODEM |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &In [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the type of modem-to-modem flow |
| | control used. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &I0 | Software flow control disabled. |
|--------------+---------------------------------------------|
| &I1 | XON/XOFF pass-through enabled. |
|--------------+---------------------------------------------|
| &I2 | XON/XOFF pass-through disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| í &H1 | CTS/RTS flow control enabled. |
|--------------+---------------------------------------------|
| &H2 | XON/XOFF flow control enabled. |
|--------------+---------------------------------------------|
| &H3 | CTS/RTS and XON/XOFF flow control enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S19=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Maximum duration of DTE and DCE inactivity |
| | allowed prior to initiating hang-up |
| | process. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PROFILE ON POWER-UP |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Yn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the profile that the modem will |
| | reset to on power-up. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Y0 | Modem resets to user profile 0 on power-up. |
|--------------+---------------------------------------------|
| Y1 | Modem resets to user profile 1 on power-up. |
|--------------+---------------------------------------------|
| Y2 | Modem resets to factory generic profile on |
| | power-up. |
|--------------+---------------------------------------------|
| Y3 | Modem resets to factory hardware flow |
| | control profile on power-up. |
|--------------+---------------------------------------------|
| Y4 | Modem resets to factory software flow |
| | control profile on power-up. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPEAT PREVIOUS COMMAND CONTINUALLY |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | A> |
|--------------+---------------------------------------------|
| Description: | Repeats the previous command until |
| | interrupted by the user. |
|--------------+---------------------------------------------|
| Note: | Do not precede this command with AT, or |
| | follow it with <CR>. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í Q0 | Result codes enabled. |
|--------------+---------------------------------------------|
| Q1 | Result codes disabled. |
|--------------+---------------------------------------------|
| Q2 | Result codes enabled in originate mode |
| | only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST PATTERN |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Transmits a test pattern to the remote |
| | modem. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S16=0 | Test pattern disabled. |
|--------------+---------------------------------------------|
| S16=4 | Test pattern enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.21 ANSWER MODE FALLBACK TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S29=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 20 |
|--------------+---------------------------------------------|
| Range: | Unidentified |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | The function of this register is |
| | unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 HANDSHAKE TIME |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S28=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 8 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Unit: | .1 second |
|--------------+---------------------------------------------|
| Description: | Sets length of V.32 handshake. A value of |
| | 255 means that the modem will only accept |
| | connections with V.32 at 9600bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.34 MAPPING |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S34=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Description: | Controls V.34 mapping, non-linear coding, |
| | transmit level deviation, pre-emphasis, and |
| | pre-coding. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | 8S-2D map enabled. |
| | | |
| | 1 | 8S-2D map disabled. |
|------+-------+---------------------------------------------|
| 1 | í 0 | 16S-4D map enabled. |
| | | |
| | 1 | 16S-4D map disabled. |
|------+-------+---------------------------------------------|
| 2 | í 0 | 32S-2D map enabled. |
| | | |
| | 1 | 32S-2D map disabled. |
|------+-------+---------------------------------------------|
| 3 | í 0 | 64S-4D map enabled. |
| | | |
| | 1 | 64S-4D map disabled. |
|------+-------+---------------------------------------------|
| 4 | í 0 | Non-linear coding enabled. |
| | | |
| | 1 | Non-linear coding disabled. |
|------+-------+---------------------------------------------|
| 5 | í 0 | Transmit level deviation enabled. |
| | | |
| | 1 | Transmit level deviation disabled. |
|------+-------+---------------------------------------------|
| 6 | í 0 | Pre-emphasis enabled. |
| | | |
| | 1 | Pre-emphasis disabled. |
|------+-------+---------------------------------------------|
| 7 | í 0 | Pre-coding enabled. |
| | | |
| | 1 | Pre-coding disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.34 OPTIONS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S33=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0 - 255 |
|--------------+---------------------------------------------|
| Description: | Controls V.34 baud rate and shaping. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | 2400 baud rate enabled. |
| | | |
| | 1 | 2400 baud rate disabled. |
|------+-------+---------------------------------------------|
| 1 | í 0 | 2743 baud rate enabled. |
| | | |
| | 1 | 2743 baud rate disabled. |
|------+-------+---------------------------------------------|
| 2 | í 0 | 2800 baud rate enabled. |
| | | |
| | 1 | 2800 baud rate disabled. |
|------+-------+---------------------------------------------|
| 3 | í 0 | 3000 baud rate enabled. |
| | | |
| | 1 | 3000 baud rate disabled. |
|------+-------+---------------------------------------------|
| 4 | í 0 | 3200 baud rate enabled. |
| | | |
| | 1 | 3200 baud rate disabled. |
|------+-------+---------------------------------------------|
| 5 | í 0 | 3429 baud rate enabled. |
| | | |
| | 1 | 3429 baud rate disabled. |
|------+-------+---------------------------------------------|
| 6 | 0 | Not used. |
|------+-------+---------------------------------------------|
| 7 | í 0 | Shaping enabled. |
| | | |
| | 1 | Shaping disabled. |
+------------------------------------------------------------+