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DATAPORT EXPRESS 3711

AT&T PARADYNE

DATAPORT EXPRESS 3711

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

8-bit ISA

Fax Class

Class I & II

Data Modulation Protocol

Bell 103A/212A

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

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

Line in

CN2

BASE I/O ADDRESS SELECTION

Port

SW1/1

SW1/2

COM1: (3F8h)

On

On

COM2: (2F8h)

Off

On

COM3: (3E8h)

On

Off

COM4: (2E8h)

Off

On

INTERRUPT SELECTION

IRQ

SW1/3

SW1/4

SW1/5

SW1/6

2

On

Off

Off

Off

3

Off

On

Off

Off

4

Off

Off

On

Off

5

Off

Off

Off

On

Proprietary AT Command Set

AUTO BAUD

Type:

Register

Format:

AT [cmds] S78=n [cmds]

Example:

AT S78=0 &W<CR>

Description:

Allows modem to connect at remote modem’s modulation.

Command

Function

» S78=0

Auto baud enabled.

S78=1

Auto baud disabled.

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

AT [cmds] \Cn [cmds]

Example:

AT \C1 &W<CR>

Description:

Controls the handling of incoming data during auto-reliable time period.

Command

Function

» \CO

Data is discarded.

\C1

Data is buffered.

\C2

Data is discarded, resets to \C1 on receipt of autoreliable fallback character.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Register

Format:

AT [cmds] %An [cmds]

Example:

AT%A20<CR>

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character. %A0 will disable this function.

BAUD RATE ADJUST

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Example:

AT &B0 \J0<CR>

Description:

Allows baud rate to follow serial port speed

Command

Function

» \J0

Baud rate adjust disabled.

\J1

Baud rate adjust enabled.

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B3 &W<CR>

Range:

1-25

Default

3

Unit:

.1 second

Description:

Sends break to modem.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Example:

AT \K5 &W<CR>

Description:

Selects response to DTE break command.

Command

Function

\K0

Send break, clear buffer, enter command mode.

\K1

Send break, clear buffer

\K2

Send break, send data, enter command mode.

\K3

Send break. send data,

\K4

Send data, send break, enter command mode.

» \K5

Send data, send break.

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Example:

AT &B0 %C1 &I2<CR>

Description:

Selects data compression.

Command

Function

%C0

Data compression disabled.

» %C1

Data compression enabled.

CONNECT MODE

Type:

Configuration

Format:

AT [cmds] \Nn [cmds]

Example:

AT \N1 DT555-1212<CR>

Description:

Sets connect mode.

Command

Function

\N0

Normal mode enabled.

\N1

Direct mode enabled.

\N2

MNP mode only enabled.

\N3

MNP mode with fallback to normal mode enabled.

\N4

V.42 mode only enabled.

\N5

V.42 mode with fallback to normal mode enabled.

\N6

V.42 mode only enabled.

» \N6

V.42 and MNP mode with fallback to normal mode enabled.

\N7

MNP mode with fallback to normal mode enabled.

CTS SIGNAL

Type:

Configuration

Format:

AT [cmds] \Dn [cmds]

Example:

AT \D0<CR>

Description:

Selects the function of the CTS signal.

Command

Function

\D0

CTS forced high.

» \D1

CTS follows DTR.

ECHO DATA

Type:

Configuration

Format:

AT [cmds] \En [cmds]

\Example:

AT \E0 <CR>

Description:

Enables modem to echo received data.

Command

Function

\E0

Data echo disabled.

» \E1

Data echo enabled.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Example:

AT \G1 &K3<CR>

Description:

Selects modem port flow control.

Command

Function

» \G0

Flow control disabled.

\G1

Flow control enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] \Qn [cmds]

Example:

AT \Q5<CR>

Description:

Sets type of flow control used by modem.

Command

Function

\Q0

Flow control disabled.

\Q1

Bidirectional XON/XOFF flow control enabled.

\Q2

CTS flow control by DCE enabled.

» \Q3

Bidirectional CTS/RTS flow control enabled.

\Q4

XON/XOFF flow control by DCE enabled.

HELP SCREENS

Type:

Immediate

Format:

AT %H

Example:

AT %H<CR>

Description:

Displays list of AT commands and their descriptions

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Example:

AT\T20<CR>

Default:

0

Range:

0-255

Unit:

1 minute

Description:

Sets the length of time that the modem does not receive information before it disconnects.

LAP-M FRAME SIZE

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Example:

AT \A3 %C1<CR>

Description:

Sets the maximum number of characters per frame of data.

Command

Function

\A0

Maximum frame size is 64

\A1

Maximum frame size is 128

\A2

Maximum frame size is 192

» \A3

Maximum frame size is 256

MODE SELECTION

Type:

Immediate

Format:

AT [cmds] +FCLASS=n

Example:

AT +FCLASS=8<CR>

Description:

Sets what mode the modem will operate in.

Command

Function

+FCLASS=0

Data mode.

+FCLASS=1

Class 1 fax mode.

+FCLASS=2

Class 2 fax mode.

+FCLASS?

Displays current setting

PROTOCOL/SPEED

Type:

Immediate

Format:

AT [cmds] %Bn [cmds]

Example:

AT %B14400<CR>

Description:

Selects the current DCE speed.

Command

Function

%B300

Select V.21 or Bell103 at 300bps speed.

%B1200

Select V.22,V.23 or Bell 212A at 1200bps speed.

%B2400

Select V.22 at 2400bps speed.

%B4800

Select v.32/V.32bis at 4800bps speed.

%B7200

Select V.32bis at 7200bps speed.

%B9600

Select V.32bis/V.32 at 9600bps uncoded speed.

%B12000

Select V.32bis at 12Kbps speed.

» %B14400

Select V.32bis at 14.4Kbps speed.

V.32bis AUTO-RETRAIN

Type:

Register

Format:

AT [cmds] S76=n [cmds]

Example:

AT S76=0 &W<CR>

Description:

Selects action the modem will take during bad line quality on 32bis connection.

Command

Function

» S76=0

Auto retrain enabled.

S76=1

Auto retrain disabled.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Example:

AT \X7 O<CR>

Description:

Selects whether XON/XOFF signals are sent to remote modem.

Command

Function

» \X0

XON/XOFF signals trapped by local modem.

\X1

XON/XOFF passed through local modem.