IBM CORPORATION
AT 288MW
Card Type | Fax, Modem (asynchronous) |
Chip Set | Unidentified |
I/O Options | Digital Simultaneous Voice Data |
Maximum Data Rate | 28.8Kbps |
Maximum Fax Rate | Unidentified |
Data Bus | 8-bit ISA |
Fax Class | Class I & II |
Data Modulation Protocol | Bell 103/212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.34 |
Fax Modulation Protocol | Unidentified |
Error Correction/Compression | MNP5, V.42, V.42bis |
V1987
Proprietary AT Command Set
AUTO-RELIABLE FALLBACK CHARACTER | |
Type: | Configuration |
Format: | AT [cmds] %An [cmds] |
Default: | 0 |
Range: | 0-127 |
Unit: | ASCII |
Description: | Sets the character used as the auto-reliable fallback character; %A0 will disable this function. |
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 |
%E2 | Auto-retrain and auto-fallback/fall-forward enabled |
BREAK SEND | |
Type: | Configuration |
Format: | AT [cmds] \B [cmds] |
Description: | Sends break to modem |
BREAK TYPE | |||
Type: | Configuration | ||
Format: | AT [cmds] \Kn [cmds] | ||
Description: | Configures action of break signal | ||
Command | Break from DTE | Break received from remote modem | |
\K0 | Online command mode enabled, send no break to remote modem | Break sent immediately to DTE | |
\K1 | Break sent to remote modem and buffered cleared | Buffers cleared, break sent to DTE | |
\K2 | Send break to remote modem immediately | Break sent immediately to DTE | |
\K3 | Send break to remote modem immediately | Break sent immediately to DTE |
CALLING TONE | |
Type: | Register |
Format: | AT [cmds] S24=n [cmds] |
Description: | Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating |
Command | Function |
S24=0 | Disable calling tone |
S24=1 | Enable calling tone |
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 reliable mode enabled |
\N3 | MNP auto-reliable mode enabled |
\N4 | V.42 reliable mode enabled |
\N5 | V.42 auto-reliable mode enabled |
\N6 | Reliable mode enabled |
\N7 | Auto-reliable mode enabled |
DCE LINE SPEED | |
Type: | Register |
Format | AT [cmds] S28=n [cmds] |
Description: | Sets the maximum allowable data exchange rate attempted during handshake process. |
Command | Function |
í S28=0 | Speed of last connection |
S28=6 | 300bps |
S28=8 | 1200bps |
S28=9 | 2400bps |
S28=10 | 4800bps using V.32bis |
S28=11 | 7200bps using V.32bis |
S28=12 | 9600bps using V.32bis |
S28=13 | 12.0Kbps using V.32bis |
S28=14 | 14.4Kbps |
S28=15 | 16.8Kbps |
S28=16 | 19.2Kbps |
S28=17 | 21.6 Kbps |
S28=18 | 24 Kbps |
S28=19 | 26.4 Kbps |
S28=20 | 28.8Kbps |
DIAL | |
Type: | Immediate |
Format: | AT [cmds] D<#> [cmds] |
Example: | ATDT18005551212,,251 |
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 |
L | Re-dial last number |
P | Pulse dialing enabled |
R | Answer mode enabled. Originate mode disabled following handshake initiation. |
S=n | Dial stored telephone number n |
T | Tone dialing enabled |
W | Dialing resumed following 2 ND dial tone |
, | Dialing paused for amount of time specified in S8 register |
! | Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook. |
@ | 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. |
; | Modem returned to command state after dialing. The semicolon can only be placed at the end of the dial command. |
DSVD | ||
Type: | Configuration | |
Format: | AT [cmds] -Sxxx [cmds] | |
Description: | Controls Data Simultaneous Voice Data mode | |
Command | Function | |
-SSE0 | Disable DSVD mode | |
-SSE1 | Enable DSVD mode |
EXTENDED RESULT CODES | |
Type: | Configuration |
Format: | AT [cmds] \Vn [cmds] |
Description: | Selects extended result codes (MNP) |
Command | Function |
\V0 | Extended result codes (MNP) disabled |
\V1 | Extended result codes (MNP) enabled |
FLOW CONTROL TYPE | |
Type: | Configuration |
Format: | AT [cmds] \Qn [cmds] |
Description: | Sets type of flow control used by modem |
Command | Function |
\Q0 | Flow control disabled |
\Q3 | Bi-directional RTS/CTS flow control enabled |
INACTIVITY TIMER | |
Type: | Configuration |
Format: | AT [cmds] \Tn [cmds] |
Default: | Unidentified |
Range: | 0-90 |
Unit: | 1 minute |
Description: | Sets the length of time that the modem does not receive information before it disconnects. |
MAXIMUM BLOCK SIZE FOR TRANSMISSION | |
Type: | Configuration |
Format: | AT [cmds] \An [cmds] |
Description: | Sets the maximum transmittable block size |
Command | Function |
\A0 | MNP block size is 64 characters |
\A1 | MNP block size is 128 characters |
\A2 | MNP block size is 192 characters |
\A3 | MNP block size is 256 characters |
MNP - STREAM/BLOCK MODE | |
Type: | Configuration |
Format: | AT [cmds] \Ln [cmds] |
Description: | Selects the transfer mode for MNP link |
Command | Function |
\L0 | Stream mode for MNP enabled |
\L1 | Block mode for MNP enabled |
PAUSE | |
Type: | Immediate |
Format: | AT [cmds] ,(comma) [cmds] |
Description: | Pause for amount of time specified in S8 register. Can be used in dial string or the command string. |
REPORT INFORMATION | |
Type: | Immediate |
Format: | AT [cmds] In [cmds] |
Description: | Displays information requested |
Command | Function |
I1 | Reports OK |
I2 | Reports OK |
I3 | Reports modem ID |
I4 | Reports product name |
STATUS-REGISTER | |
Type: | Configuration |
Format: | Read: AT [cmds] Sn? [cmds] Write: AT [cmds] Sn=x [cmds] |
Description: | Writes to or reads from a specified register |
Note: See the section on S-registers for detailed listing of commonly used S-registers. |
V.34 - BAUD RATE | ||
Type: | Register | |
Format: | AT [cmds] S31=n [cmds] | |
Description: | Controls baud rate used by V.43 data pump | |
Command | Function | |
í S31=0 | 2400 baud rate disabled | |
S31=1 | 2743 baud rate disabled | |
S31=2 | 2800 baud rate disabled | |
S31=3 | 3000 baud rate disabled | |
S31=4 | 3200 baud rate disabled | |
S31=5 | 3429 baud rate disabled | |
S31=6 | Asymmetric symbol rate disabled |
V.34 - DATA PUMP OPTIONS | ||
Type: | Register | |
Format: | AT [cmds] S33=n [cmds] | |
Description: | Select V.34 data pump options | |
Command | Function | |
S33=0 | Asymmetric rate for V.34 disabled | |
S33=1 | Auxiliary channel for V.34 disabled | |
S33=8 | Power reduction disabled | |
S33=9 | Pre-emphasis disabled | |
S33=10 | Constellation warping disabled | |
S33=11 | Constellation shaping disabled | |
S33=12 | Precoding disabled |
V.34 - OPTIONS | ||
Type: | Register | |
Format: | AT [cmds] S30=n [cmds] | |
Description: | Disables V.43 data pump at speeds higher than 14.4Kbps and enables V.32bis modem. | |
Command | Function | |
í S30=0 | Call indicator disabled | |
S30=1 | V.8 disabled | |
S30=2 | V.34 disabled |
V.34 - SIGNAL PROCESSING OPTIONS | ||
Type: | Register | |
Format: | AT [cmds] S34=n [cmds] | |
Description: | Controls signal processing for V.34 data pump | |
Command | Function | |
í S34=0 | Request for power reduction disabled | |
S34=1 | Request for pre-emphasis disabled | |
S34=2 | Request for constellation warping disabled | |
S34=3 | Request for constellation shaping disabled | |
S34=4 | Request for precoding disabled |
V.42bis - COMPRESSION CONTROL | |
Type: | Configuration |
Format: | AT [cmds] "Hn [cmds] |
Description: | Controls V.42bis data compression |
Command | Function |
"H0 | V.42bis disabled |
"H1 | V.42bis when transmitting enabled |
"H2 | V.42bis when receiving enabled |
"H3 | V.42bis when transmitting/receiving enabled |
V.42bis - DICTIONARY SIZE | |
Type: | Configuration |
Format: | AT [cmds] "Nn [cmds] |
Description: | Select V.42 dictionary size |
Command | Function |
"N0 | Select 512 bytes |
"N1 | Select 1024 bytes |
"N2 | Select 2048 bytes |
V.42bis - MAXIMUM STRING LENGTH | |
Type: | Immediate |
Format: | AT [cmds] "On [cmds] |
Default: | 32 |
Range: | 6-250 |
Unit: | Characters |
Description: | Selects string size for V.42bis compression |