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# BEST DATA PRODUCTS, INC.
1442F INTERNAL FAX/DATA MODEM
Card Type Fax, Modem (synchronous/asynchronous)
Chip Set Unidentified
Maximum Data Rate 14.4Kbps
Maximum Fax Rate 14.4Kbps
Data Bus 8-bit ISA
Fax Class Class I & II
Data Modulation Bell 103/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.23, V.32,
V.32bis
Fax Modulation ITU-T V.17, V.21CH2, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
V2327
+-------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|-------------------------------|
| Diagram not available |
+-------------------------------+
+------------------------------------------------------------+
| SERIAL PORT ADDRESS |
|------------------------------------------------------------|
| Setting | SW1/5 | SW1/6 |
|--------------------+-------------------+-------------------|
| COM1 (3F8h) | On | On |
|--------------------+-------------------+-------------------|
| í COM2 (2F8h) | On | Off |
|--------------------+-------------------+-------------------|
| COM3 (3E8h) | Off | On |
|--------------------+-------------------+-------------------|
| COM4 (2E8h) | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT SELECTION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|------------+-----------+-----------+-----------+-----------|
| í 3 | On | Off | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 4 | Off | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 5 | Off | Off | On | Off |
|------------+-----------+-----------+-----------+-----------|
| 7 | Off | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, ‘+++’, ‘Comma’, A/ |
|------------------------------------------------------------|
| A, B, C, D, E, F, , H, L, M, N, O, P, Q, S, T, V, W, X, Y, |
| Z |
|------------------------------------------------------------|
| &C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, |
| &W, &X, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \G, \L, \O, \T, \U, \Y, \Z, %E, %L, %Q |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S16, S18, S22, S25, S26, S36, S38, S46 |
|------------------------------------------------------------|
| S48, S82, S86, S91, S95 |
|------------------------------------------------------------|
| Note: See MHI Help file for full command documentation. |
+------------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S14 |
|------------------------------------------------------------|
| Format: | AT [cmds] S14=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 170 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls local echo, command echo, result |
| | codes and display, dial mode, and |
| | answer/originate mode. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Disable local echo |
| | | |
| | 1 | Enable local echo |
|------+-------+---------------------------------------------|
| 1 | 0 | Command echo disabled |
| | | |
| | í 1 | Command echo enabled |
|------+-------+---------------------------------------------|
| 2 | í 0 | Result codes enabled |
| | | |
| | 1 | Result codes disabled |
|------+-------+---------------------------------------------|
| 3 | 0 | Display result codes in numeric format |
| | | |
| | í 1 | Display result codes in verbose format |
|------+-------+---------------------------------------------|
| 4 | í 0 | Smart mode enabled |
| | | |
| | 1 | Dumb mode enabled |
|------+-------+---------------------------------------------|
| 5 | 0 | Tone dial enabled |
| | | |
| | í 1 | Pulse dial enabled |
|------+-------+---------------------------------------------|
| 6 | í 0 | Result codes enabled |
| | | |
| | 1 | Result codes enabled when originating |
|------+-------+---------------------------------------------|
| 7 | 0 | Answer mode enabled |
| | | |
| | í 1 | Originate mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S21 |
|------------------------------------------------------------|
| Format | AT [cmds] S21=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 0 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects jack type, setting profile, |
| | CTS/DCD/DSR signals, low DTR action, and |
| | the long space disconnect function. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | í 0 | Selects RJ-11, RJ-41S, or RJ45S jack |
| | | |
| | 1 | Selects RJ-12 or RJ-13 jack |
|------+-------+---------------------------------------------|
| 1 | í 0 | Default profile |
| | | |
| | 1 | User-defined profile |
|------+-------+---------------------------------------------|
| 2 | í 0 | CTS follows RTS |
| | | |
| | 1 | CTS forced high |
|------+-------+---------------------------------------------|
| 4, 3 | í 00 | DTR signal ignored |
| | | |
| | 01 | Modem goes to command mode on low DTR |
| | | |
| | 10 | Modem disconnects on low DTR; Auto-Answer |
| | | is disabled. |
| | 11 | |
| | | Modem is initialized on low DTR |
|------+-------+---------------------------------------------|
| 5 | í 0 | DCD forced high |
| | | |
| | 1 | DCD normal |
|------+-------+---------------------------------------------|
| 6 | í 0 | DSR forced high |
| | | |
| | 1 | DSR normal |
|------+-------+---------------------------------------------|
| 7 | í 0 | Long space disconnect function disabled |
| | | |
| | 1 | Long space disconnect function enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S23 |
|------------------------------------------------------------|
| Format | AT [cmds] S23=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 7 |
|--------------+---------------------------------------------|
| Range: | 0-191 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Grants/denies remote digital loopback, |
| | controls DTE rate and parity, and sets |
| | guard tone. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | Remote digital loopback denied |
| | | |
| | í 1 | Remote digital loopback allowed |
|------+-------+---------------------------------------------|
| 3 - | 000 | Sets serial port speed to 0-300bps |
| 1 | | |
| | 001 | Sets serial port speed to 600bps |
| | | |
| | 010 | Sets serial port speed to 1200bps |
| | | |
| | í 011 | Sets serial port speed to 2400bps |
| | | |
| | 100 | Sets serial port speed to 4800bps |
| | | |
| | 101 | Sets serial port speed to 9600bps |
| | | |
| | 110 | Sets serial port speed to 19200bps |
| | | |
| | 111 | Sets serial port speed to 38400bps |
|------+-------+---------------------------------------------|
| 5, 4 | í 00 | Parity even |
| | | |
| | 01 | Space Parity |
| | | |
| | 10 | Parity odd |
| | | |
| | 11 | Mark or No Parity |
|------+-------+---------------------------------------------|
| 7, 6 | í 00 | Guard tone disabled |
| | | |
| | 01 | Guard tone 550Hz enabled |
| | | |
| | 10 | Guard tone 1800Hz enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format | AT [cmds] S27=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 64 |
|--------------+---------------------------------------------|
| Range: | 0-127 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects synchronous/asynchronous mode, line |
| | type, clock source, and ITU-T/Bell modes. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 3, | í 000 | Asynchronous mode, serial port speed |
| 1, 0 | | follows connect speed |
| | 001 | |
| | | Asynchronous off-line command mode and |
| | 010 | synchronous connect mode |
| | | |
| | 011 | Asynchronous off-line command mode; modem |
| | | autodials first number in directory, then |
| | 100 | synchronous connect mode |
| | | |
| | 101 | Asynchronous off-line command mode on low |
| | | DTR, synchronous connect mode on high DTR |
| | 110 | |
| | | Modem returns ‘OK’ |
| | 111 | |
| | | Error correction mode |
| | | |
| | | Asynchronous mode during Normal connect |
| | | mode |
| | | |
| | | Modem returns ‘OK’ |
|------+-------+---------------------------------------------|
| 2 | í 0 | Switched line |
| | | |
| | 1 | Leased line |
|------+-------+---------------------------------------------|
| 5, 4 | í 00 | Local modem generates transmit clock source |
| | | |
| | 01 | Local DTE generates transmit clock source |
| | | |
| | 10 | Remote DCE/DTE generates transmit clock |
| | | source |
|------+-------+---------------------------------------------|
| 6 | 0 | ITU/T mode |
| | | |
| | í 1 | Bell mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S40 |
|------------------------------------------------------------|
| Format | AT [cmds] S40=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 119 |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls connect mode, break handling, MNP |
| | block size, and flow control. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 1, 0 | 00 | Normal mode enabled |
| | | |
| | 01 | Direct mode enabled |
| | | |
| | 10 | Reliable mode enabled |
| | | |
| | í 11 | Auto-reliable mode enabled |
|------+-------+---------------------------------------------|
| 4, | 000 | \K0 |
| 3, 2 | | |
| | 001 | \K1 |
| | | |
| | 010 | \K2 |
| | | |
| | 011 | \K3 |
| | | |
| | 100 | \K4 |
| | | |
| | í 101 | \K5 |
|------+-------+---------------------------------------------|
| 6, 5 | 00 | MNP block size is 64 characters |
| | | |
| | 01 | MNP block size is 128 characters |
| | | |
| | 10 | MNP block size is 192 characters |
| | | |
| | í 11 | MNP block size is 256 characters |
|------+-------+---------------------------------------------|
| 7 | í 0 | Flow control disabled |
| | | |
| | 1 | Flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S41 |
|------------------------------------------------------------|
| Format | AT [cmds] S41=n [cmds] |
|--------------+---------------------------------------------|
| Default: | 1 |
|--------------+---------------------------------------------|
| Range: | 0-7 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects compression, auto-retrain, and MNP |
| | mode. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | Data compression disabled |
| | | |
| | í 1 | Data compression enabled |
|------+-------+---------------------------------------------|
| 1 | í 0 | Auto-retrain disabled |
| | | |
| | 1 | Auto-retrain enabled |
|------+-------+---------------------------------------------|
| 2 | í 0 | Stream mode for MNP |
| | | |
| | 1 | Block mode for MNP |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|---------------------+--------------------------------------|
| Format: | AT [cmds] \Kn [cmds] |
|---------------------+--------------------------------------|
| Description: | Configures action of break signal |
|------------------------------------------------------------|
| Command | Break from | Break received | Break from DTE |
| | DTE during | from remote | during Direct |
| | MNP mode | modem | mode |
|-----------+--------------+----------------+----------------|
| \K0 | Online | Buffers | Online command |
| | command mode | cleared, break | mode enabled, |
| | enabled, | sent to DTE | send no break |
| | send no | | to remote |
| | break to | | modem |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| \K1 | Break sent | Buffers | Break sent to |
| | to remote | cleared, break | remote modem |
| | modem and | sent to DTE | and buffers |
| | buffers | | cleared |
| | cleared | | |
|-----------+--------------+----------------+----------------|
| \K2 | Online | Break sent | Online command |
| | command mode | immediately to | mode enabled, |
| | enabled, | DTE | send no break |
| | send no | | to remote |
| | break to | | modem |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| \K3 | Send break | Break sent | Send break to |
| | to remote | immediately to | remote modem |
| | modem | DTE | immediately |
| | immediately | | |
|-----------+--------------+----------------+----------------|
| \K4 | Online | Break sent | Online command |
| | command mode | with received | mode enabled, |
| | enabled, | data to the | send no break |
| | send no | DTE | to remote |
| | break to | | modem |
| | remote modem | | |
|-----------+--------------+----------------+----------------|
| \K5 | Send break | Break sent | Send break |
| | with | with received | with |
| | transmitted | data to the | transmitted |
| | data | DTE | data |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled |
|--------------+---------------------------------------------|
| í %C1 | Data compression enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the type of connection the modem |
| | will operate in |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled |
|--------------+---------------------------------------------|
| \N1 | Direct mode enabled |
|--------------+---------------------------------------------|
| \N2 | Reliable mode enabled |
|--------------+---------------------------------------------|
| í \N3 | Auto-reliable mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCE LINE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S37=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate attempted during handshake process. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í S37=0 | Speed of last connection |
|--------------+---------------------------------------------|
| S37=1 | 300bps |
|--------------+---------------------------------------------|
| S37=2 | 300bps |
|--------------+---------------------------------------------|
| S37=3 | 300bps |
|--------------+---------------------------------------------|
| S37=5 | 1200bps |
|--------------+---------------------------------------------|
| S37=6 | 2400bps |
|--------------+---------------------------------------------|
| S37=8 | 4800bps |
|--------------+---------------------------------------------|
| S37=9 | 9600bps |
|--------------+---------------------------------------------|
| S37=10 | 12.0Kbps |
|--------------+---------------------------------------------|
| S37=11 | 14.4Kbps |
|--------------+---------------------------------------------|
| S37=12 | 7200bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECHO CANCELLATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \En [cmds] |
|--------------+---------------------------------------------|
| Description: | Optimize echo cancellation |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum, as ‘OK’ or |
| | ‘ERROR’ |
|--------------+---------------------------------------------|
| I3 | Reports firmware manufacturer |
| | identification and checksum |
|--------------+---------------------------------------------|
| I4 | Reports product capabilities |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42 - CLEAR DICTIONARY |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %P [cmds] |
|--------------+---------------------------------------------|
| Description: | Clears the V.42 encoder dictionary |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - COMPRESSION CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls V.42bis data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %M0 | V.42bis disabled |
|--------------+---------------------------------------------|
| %M1 | V.42bis when transmitting enabled |
|--------------+---------------------------------------------|
| %M2 | V.42bis when receiving enabled |
|--------------+---------------------------------------------|
| í %M3 | V.42bis when transmitting/receiving enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - DICTIONARY SIZE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Select V.42 dictionary size |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %D0 | Select 512 bytes |
|--------------+---------------------------------------------|
| %D1 | Select 1024 bytes |
|--------------+---------------------------------------------|
| í %D2 | Select 2048 bytes |
|--------------+---------------------------------------------|
| %D3 | Select 4096 bytes, one-way compression |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.42bis - MAXIMUM STRING LENGTH |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Sn [cmds] |
|--------------+---------------------------------------------|
| Default: | 32 |
|--------------+---------------------------------------------|
| Range: | 6-250 |
|--------------+---------------------------------------------|
| Unit: | Characters |
|--------------+---------------------------------------------|
| Description: | Selects string size for V.42bis compression |