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AT 288MW

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 2ND 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