MAXTECH CORPORATION
288B (RC288/R6)
Card Type | Modem/Fax card |
Chip Set | Unidentified |
I/O Options | Line in(RJ-11), line out(RJ-11) |
Maximum Modem Rate | 28.8Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Modulation Protocol | Bell 103/212A ITU-T V34, V.32bis, V.32, V.22bis, V.22, V.21, V.FC |
Fax Modulation Protocol | ITU-T V.17, V.27ter, V.29, V.21 |
Error Correction/Compression | MNP5, V.42, V.42bis |
Fax Class | Class I & II |
Data Bus | 8-bit ISA |

CONNECTIONS | ||||||
Function | Label | Function | Label | |||
RJ-11 line | CN1 | RJ-11 line | CN2 | |||
SERIAL PORT ADDRESS | ||
Setting | SW1/1 | SW1/2 |
COM1 (3F8h) | On | On |
COM2 (2F8h) | Off | On |
COM3 (3E8h) | On | Off |
COM4 (2E8h) | Off | Off |
INTERRUPT | ||||
Setting | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
IR/FONT> | On | Off | Off | Off |
IRQ3 | Off | On | Off | Off |
IRQ4 | Off | Off | On | Off |
IRQ5 | Off | Off | Off | On |
SUPPORTED COMMAND SET |
Basic AT Commands |
AT, +++, A/ |
A, E, H, M, P, Q, T, V, X, Y, Z |
&C, &G, &T, &V, &W, &Y, &Z |
Extended AT Commands |
\A, \B, \C, \E, \G, \J, \K, \O, \Q, \U, \X, \Y, \Z |
%A |
S Registers |
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, |
S23, S24, S25, S26, S27, S28 |
Note: See MHI Help File for full command documentation. |
PROPRIETARY AT COMMAND SET
AUTO-FALLFORWARD/FALLBACK | |
Type: | Configuration |
Format: | AT [cmds] &En [cmds] |
Description: | Enables/disables auto fallforward/fallback |
Command | Function |
í &E0 | Auto fallforward/fallback disabled |
&E1 | Auto fallforward/fallback enabled |
COMMUNICATION PROTOCOLS | |
Type: | Configuration |
Format: | AT [cmds] Bn [cmds] |
Description: | Selects the communication protocol for data calls |
Note: The B command allows the simultaneous selection of more than one suffix, enabling multiple protocols. | |
Command | Protocol |
B0 | CCITT mode |
í B1 | Bell 212A at 300 or 1200bps |
B2 | Autoscan mode |
B3 | CCITT V.23 mode |
B4 | 300bps |
B5 | 1200bps |
B6 | 2400bps |
B7 | 4800bps |
B8 | 9600bps |
B9 | 14400bps |
B10 | 16800bps |
B11 | 19200bps |
B12 | 21600bps |
B13 | 24000bps |
B14 | 26400bps |
B15 | 28800bps |
COMMUNICATIONS MODE | |
Type: | Configuration |
Format: | AT [cmds] &Mn [cmds] |
Description: | Selects communications mode |
Command | Mode |
&M0 | Asynchronous mode |
DATA SET READY (DSR) | |
Type: | Configuration |
Format: | AT [cmds] &Sn [cmds] |
Description: | Selects DSR options |
Command | Function |
í &S0 | DSR forced high |
&S1 | DSR high only while modem is handshaking or connected |
DATA TERMINAL READY (DTR) | |
Type: | Configuration |
Format: | AT [cmds] &Dn [cmds] |
Description: | Selects modem response to DTR |
Command | Function |
í &D0 | DTR override |
&D1 | DTR toggle causes online command mode |
&D2 | Normal DTR operations |
&D3 | Resets on receipt of DTR |
DIAL | |
Type: | Immediate |
Format: | AT [cmds] D<#> [cmds] |
Description: | Dials telephone number according to any modifiers included in the string |
Note: | Any combination of modifiers can be used to produce the desired dial functions in sequence. |
Command | Function |
DP | Pulse dialing enabled |
DS=n | Dial stored telephone number n |
DT | Tone dialing enabled/Pulse dialing disabled |
DW | Dialing resumed following dial tone detection |
D, | Dialing paused for amount of time specified in S8 register |
D! | Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook. |
D@ | Wait for Quite 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. |
FACTORY DEFAULT PROFILE | |
Type: | Configuration |
Format: | AT [cmds] &F [cmds] |
Description: | Sets values in active profile to values found in the default profile |
Command | Function |
í &F0 | Factory default profile with V.42bis/hardware flow control enabled |
&F1 | Factory default profile with software flow control enabled |
&F2 | Factory default profile with V.42bis/hardware flow control enabled |
&F3 | Factory default profile with software flow control enabled (Macintosh) |
&F4 | Factory default profile with V.42bis/hardware flow control enabled (Macintosh) |
&F5 | Factory default profile with V.42bis/hardware flow control disabled |
HELP SCREEN | |
Type: | Configuration |
Format: | AT [cmds] &H [cmds] |
Description: | Displays help screen |
LINE TYPE | |
Type: | Configuration |
Format: | AT [cmds] &Ln [cmds] |
Description: | Selects line type |
Command | Line Type |
&L0 | Switched line (PSTN/Dial-up) |
&L1 | Leased-line |
&L2 | Auto-connect leased-line operation |
ON-LINE | |
Type: | Immediate |
Format: | AT [cmds] On [cmds] |
Description: | Controls on-line command (data transmission) state options. |
Note: The O command must be placed at the end of the command string. | |
Command | Function |
O0 | On-line command mode with no retraining enabled |
O1 | On-line command mode with retraining enabled |
O2 | On-line command mode with retraining and speed fall forward enabled |
O3 | On-line command mode with retraining and speed fall backward enabled |
ORIGINATE MODE | |
Type: | Configuration |
Format: | AT [cmds] &On [cmds] |
Description: | Enables/disables originate-only mode |
Command | Line Type |
&O0 | Originate-only mode disabled |
&O1 | Originate-only mode enabled |
PULSE DIALING RATIO | |
Type: | Configuration |
Format: | AT [cmds] &Pn [cmds] |
Description: | Selects pulse dial make/break ratio |
Command | Function |
í &P0 | 39/61ms at 10pps (North America) |
&P1 | 33/67ms at 10pps (Europe) |
REPORT INFORMATION | |
Type: | Immediate |
Format: | AT [cmds] In [cmds] |
Description: | Displays information requested |
Command | Function |
I0 | Reports four digit product code |
I1 | Reports ROM checksum |
I2 | Reports internal memory test |
I3 | Reports firmware ID |
I4 | Reserved |
SPEAKER VOLUME | |
Type: | Configuration |
Format: | AT [cmds] Ln [cmds] |
Description: | Controls speaker volume |
Command | Function |
L0 | Low volume setting |
í L1 | Low volume setting |
L2 | Medium volume setting |
L3 | Highest volume setting |
EXTENDED AT COMMAND SET
AUTODETECT V.34 & V.FC | |
Type: | Configuration |
Format: | AT [cmds] %Mn [cmds] |
Description: | Controls autodetect for V.34 and V.FC negotiation signals |
Command | Function |
%M0 | V.34 and V.FC autodetect enabled |
%M1 | V.34 autodetect enabled |
%M2 | V.FC autodetect enabled |
AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD | |
Type: | Configuration |
Format: | AT [cmds] %En [cmds] |
Description: | Controls auto-retrain mode and fallback/fall-forward |
Command | Function |
%E0 | Auto-retrain disabled |
%E1 | Auto-retrain enabled |
CALL-BACK SECURITY | |
Type: | Configuration |
Format: | AT [cmds] %Sn [cmds] |
Description: | Selects call-back security password options |
Command | Function |
%S0 | Call-back security disabled |
%S1 | Call-back security with password check enabled |
%S2 | Password check only enabled |
CLEAR-DOWN SIGNAL | |
Type: | Configuration |
Format: | AT [cmds] %Dn [cmds] |
Description: | Enables/disables clear-down signal |
Command | Function |
%D0 | Clear-down signal disabled |
%D1 | Clear-down signal enabled |
COMPRESSION | |
Type: | Configuration |
Format: | AT [cmds] %Cn [cmds] |
Description: | Selects data compression |
Command | Function |
%C0 | Data compression disabled |
%C1 | MNP5 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 | MNP mode enabled |
\N3 | MNP or Normal mode enabled |
\N4 | V.42 mode enabled |
\N5 | V.42 or MNP reliable mode enabled |
\N6 | V.42/MNP/Normal mode enabled |
EXTENDED RESULT CODES | |
Type: | Configuration |
Format: | AT [cmds] \Vn [cmds] |
Description: | Selects extended result codes |
Command | Function |
\V0 | Reports DCE speed; extended result codes disabled |
í \V1 | Reports DCE speed; extended result codes enabled |
\V2 | Reports DTE speed; extended result codes disabled |
\V3 | Reports DTE speed; extended result codes enabled |
INACTIVITY TIMER | |
Type: | Configuration |
Format: | AT [cmds] \Tn [cmds] |
Range: | 0-90 |
Unit: | 1 second |
Description: | Sets the length of time that the modem does not receive information before it disconnects. |
LINE SIGNAL LEVEL | |
Type: | Immediate |
Format: | AT [cmds] %L [cmds] |
Range: | 0-15 |
Unit: | -1 dBm |
Description: | Sets transmit level. Default=12 |
POWER-ON AUTO-CONNECT | |
Type: | Configuration |
Format: | AT [cmds] %Pn [cmds] |
Description: | Enables/disables power-on auto-connect |
Command | Function |
%P0 | Power-on auto-connect disabled |
%P1 | Power-on auto-connect enabled |
STORED PASSWORD | |
Type: | Configuration |
Format: | AT [cmds] \P=n [cmds] |
Range: | 0-127 |
Unit: | ASCII |
Description: | Stores password with a maximum of seven characters in NVRAM. \P=? displays stored password |