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1442F INTERNAL FAX/DATA MODEM

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 Protocol

Bell 103/212A

ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

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

1

Disable local echo

Enable local echo

1

0

í 1

Command echo disabled

Command echo enabled

2

í 0

1

Result codes enabled

Result codes disabled

3

0

í 1

Display result codes in numeric format

Display result codes in verbose format

4

í 0

1

Smart mode enabled

Dumb mode enabled

5

0

í 1

Tone dial enabled

Pulse dial enabled

6

í 0

1

Result codes enabled

Result codes enabled when originating

7

0

í 1

Answer mode enabled

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

1

Selects RJ-11, RJ-41S, or RJ45S jack

Selects RJ-12 or RJ-13 jack

1

í 0

1

Default profile

User-defined profile

2

í 0

1

CTS follows RTS

CTS forced high

4, 3

í 00

01

10

11

DTR signal ignored

Modem goes to command mode on low DTR

Modem disconnects on low DTR; Auto-Answer is disabled.

Modem is initialized on low DTR

5

í 0

1

DCD forced high

DCD normal

6

í 0

1

DSR forced high

DSR normal

7

í 0

1

Long space disconnect function disabled

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

í 1

Remote digital loopback denied

Remote digital loopback allowed

3 - 1

000

001

010

í 011

100

101

110

111

Sets serial port speed to 0-300bps

Sets serial port speed to 600bps

Sets serial port speed to 1200bps

Sets serial port speed to 2400bps

Sets serial port speed to 4800bps

Sets serial port speed to 9600bps

Sets serial port speed to 19200bps

Sets serial port speed to 38400bps

5, 4

í 00

01

10

11

Parity even

Space Parity

Parity odd

Mark or No Parity

7, 6

í 00

01

10

Guard tone disabled

Guard tone 550Hz enabled

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, 1, 0

í 000

001

010

011

100

101

110

111

Asynchronous mode, serial port speed follows connect speed

Asynchronous off-line command mode and synchronous connect mode

Asynchronous off-line command mode; modem autodials first number in directory, then synchronous connect mode

Asynchronous off-line command mode on low DTR, synchronous connect mode on high DTR

Modem returns ‘OK’

Error correction mode

Asynchronous mode during Normal connect mode

Modem returns ‘OK’

2

í 0

1

Switched line

Leased line

5, 4

í 00

01

10

Local modem generates transmit clock source

Local DTE generates transmit clock source

Remote DCE/DTE generates transmit clock source

6

0

í 1

ITU/T mode

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

01

10

í 11

Normal mode enabled

Direct mode enabled

Reliable mode enabled

Auto-reliable mode enabled

4, 3, 2

000

001

010

011

100

í 101

\K0

\K1

\K2

\K3

\K4

\K5

6, 5

00

01

10

í 11

MNP block size is 64 characters

MNP block size is 128 characters

MNP block size is 192 characters

MNP block size is 256 characters

7

í 0

1

Flow control disabled

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

í 1

Data compression disabled

Data compression enabled

1

í 0

1

Auto-retrain disabled

Auto-retrain enabled

2

í 0

1

Stream mode for MNP

Block mode for MNP

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Description:

Configures action of break signal

Command

Break from DTE during MNP mode

Break received from remote modem

Break from DTE during Direct mode

\K0

Online command mode enabled, send no break to remote modem

Buffers cleared, break sent to DTE

Online command mode enabled, send no break to remote modem

\K1

Break sent to remote modem and buffers cleared

Buffers cleared, break sent to DTE

Break sent to remote modem and buffers cleared

\K2

Online command mode enabled, send no break to remote modem

Break sent immediately to DTE

Online command mode enabled, send no break to remote modem

\K3

Send break to remote modem immediately

Break sent immediately to DTE

Send break to remote modem immediately

\K4

Online command mode enabled, send no break to remote modem

Break sent with received data to the DTE

Online command mode enabled, send no break to remote modem

\K5

Send break with transmitted data

Break sent with received data to the DTE

Send break with transmitted 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