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14.4 VOICE DATA/FAX MODEM

SIMPLE TECHNOLOGY, INC.

14.4 VOICE DATA/FAX MODEM

Modem Type

Data (synchronous/asynchronous)/Fax/Voice

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

PCMCIA Type II

Fax Class

Class I

Data Modulation Protocol

Bell 103A/212A

ITU-T V.21, 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

V1477

Proprietary AT Command Set

ACCEPT RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \U [cmds]

Example:

AT \U B1<CR>

Description:

Accepts remote modems request for reliable link.

AUTO FALL FORWARD/FALLBACK

Type:

Configuration

Format:

AT [cmds] %Gn [cmds]

Example:

AT %G0 &W <CR>

Description:

Selects auto fallback in V.32bis.

Command

Function

%G0

Fallback disabled.

%G1

Fallback enabled.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Example:

AT%A13<CR>

Default:

13

Range:

0-127

Unit:

ASCII

Description:

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

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, sets to normal mode and sends auto-reliable character to serial port.

AUTO-RETRAIN

Type:

Configuration

Format:

AT %En

Example:

AT %E1 <CR>

Description:

Selects auto-retrain mode.

Command

Function

%E0

Auto-retrain disabled.

%E1

Auto-retrain enabled.

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14? [cmds]

Example:

ATS14?<CR>

Default:

Read only

Range:

0-182

Unit:

Bit-mapped

Description:

Displays echo, result codes, dumb mode, dial mode, and answer/originate mode.

Bit

Value

Function

0

0

Not used.

1

0

1

Command echo disabled.

Command echo enabled.

2

0

1

Result codes enabled.

Result codes disabled.

3

0

Not used.

4

0

1

Dumb mode off (normal).

Dumb mode on.

5

0

1

Tone dial enabled.

Pulse dial enabled.

6

0

Not used.

7

0

1

Answer mode enabled.

Originate mode enabled.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21? [cmds]

Example:

ATS21?<CR>

Default:

Read only

Range:

0 - 253

Unit:

Bit-mapped

Description:

Displays jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function.

Bit

Value

Function

0

0

1

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

Selects RJ-12 or RJ-13 jack.

1

0

Not used.

2

0

1

CTS forced high.

CTS follows RTS.

4, 3

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

0

1

DCD forced high.

DCD normal.

6

0

1

DSR forced high.

DSR normal.

7

0

1

Long Space Disconnect function disabled.

Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22? [cmds]

Example:

ATS22?<CR>

Default:

Read only

Range:

0-255

Unit:

Bit-mapped

Description:

Displays speaker volume and controls, and limits results codes.

Bit

Value

Function

1, 0

00

01

10

11

Not used.

On volume.

Medium level volume.

High level volume.

3, 2

00

01

10

11

Speaker off.

Speaker off on carrier.

Speaker always on.

Speaker on during handshake.

6, 5, 4

000

100

101

110

111

Busy and dialtone detection disabled, result codes 0-4 enabled.

Busy and dialtone detection disabled, result codes 0-5, 10 enabled.

Busy tone detection disabled, dialtone detection enabled, result codes 0-6, 10 enabled.

Busy tone detection enabled, dialtone detection disabled, result codes 0-5, 7, 10 enabled.

Busy and dialtone detection enabled, result codes 0-7, 10 enabled.

7

0

1

39/61ms at 10pps (North America)

33/67ms at 10pps (Europe)

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23? [cmds]

Example:

ATS23?<CR>

Default:

Read only

Range:

0-255

Unit:

Bit-mapped

Description:

Displays remote digital loopback status, DTE rate and parity, and guard tone.

Bit

Value

Function

0

0

1

Remote digital loopback denied.

Remote digital loopback allowed.

3, 2, 1

000

001

010

011

100

101

110

Sets serial port speed to 0-300bps.

Sets serial port speed to 1200bps.

Sets serial port speed to 2400bps.

Sets serial port speed to 4800bps.

Sets serial port speed to 7200bps.

Sets serial port speed to 9600bps.

Sets serial port speed to 38400bps.

5,4

00

01

10

11

Parity even.

No Parity.

Parity odd.

Mark.

7, 6

00

01

10

Guard tone disabled.

Guard tone 550Hz enabled.

Guard tone 1800Hz enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Example:

ATS27=64<CR>

Default:

64

Range:

0 - 255

Unit:

Bit-mapped

Description:

Controls communications mode, line type, and protocol type.

Note:

Be aware that bits 2 and 3 are out of order.

Bit

Value

Function

3, 1, 0

0

Asynchronous mode, serial port speed follows connect speed.

2

0

1

Switched line.

Lease line.

5, 4

0

Modem generates clock source.

6

0

1

Select CCITT protocols.

Select Bell protocols.

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B3 &W<CR>

Default:

3

Range:

1-9

Unit:

.1 second

Description:

Sends break to modem.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] \Kn [cmds]

Example:

AT \K1 <CR>

Description:

Configures action of break signal.

Command

Break from DTE

Reliable/Normal mode

Break from DTE

Direct mode

Modem receives \B

Break from remote modem

\K0

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

\K1

Buffers cleared and break sent to remote modem.

Send break to remote modem immediately.

Buffers cleared and break sent to remote modem.

Buffers cleared and break sent to DTE.

\K2

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Send break to remote modem immediately.

Send break to DTE immediately.

\K3

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to DTE immediately.

\K4

Enter command mode, do not send break to remote modem.

Send break to remote modem immediately, then enter command mode.

Send break to remote modem with transmitted data.

Break sent with received data to the DTE.

\K5

Send break with transmitted data.

Send break to remote modem immediately.

Send break to remote modem with transmitted data.

Break sent with received data to the DTE.

COMPRESSION

Type:

Configuration

Format:

AT %Cn

Example:

AT *EC0 %C1 *AP0<CR>

Description:

Selects data compression.

Command

Function

%C0

Data compression disabled.

%C1

Data compression enabled.

DTE SPEED OPTION

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Example:

AT \J0 &W<CR>

Description:

Controls the speed of the DTE.

Command

Function

\J0

DCE and DTE rates are independent.

\J1

DTE rate adjusts to DCE rate after connection.

CALLING TONE

Type:

Configuration

Format:

AT [cmds] -Cn [cmds]

Example:

AT -C0 &W<CR>

Description:

Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating.

Command

Function

-C0

Disable calling tone.

-C1

Enable calling tone.

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

Reliable mode enabled.

\N3

Auto-reliable mode enabled.

\N4

LAPM mode enabled.

CONVERT TO RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \Y [cmds]

Example:

AT \Y<CR>

Description:

Initiates reliable mode link.

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 \Q0 A <CR>

Description:

Sets type of flow control used by modem.

Command

Function

\Q0

Flow control disabled.

\Q1

XON/XOFF flow control enabled.

\Q2

CTS flow control to DTE enabled.

\Q3

RTS/CTS flow control enabled.

INACTIVITY TIMER

Type:

Immediate

Format:

AT [cmds] S90=n [cmds]

Example:

ATS90=20<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. S90=0 will disable.

INACTIVITY TIMER

Type:

Configuration

Format:

AT [cmds] \Tn [cmds]

Example:

AT\T20<CR>

Default:

0

Range:

0-90

Unit:

1 minute

Description:

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

\T0 will disable.

REPORT SIGNAL QUALITY

Type:

Immediate

Format:

AT [cmds] %Q [cmds]

Example:

AT %Q<CR>

Description:

Reports signal quality. If the value is greater than 7, the modem will retrain.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Example:

AT \A3 %C1<CR>

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.

ON-LINE IN RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \O

Example:

AT \O <CR>

Description:

Returns to on-line and requests reliable mode connection.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT I1 &W<CR>

Description:

Displays modem properties.

Command

Function

I0

Reports product code.

I1

Reports firmware version number.

I2

Reports ROM checksum.

I3

Reports device set name.

I4

Reports current configuration (see rows below, default is 31).

 

Bit

Value

Meaning

 

0

0

1

Hayes escape sequence.

TIES escape sequence.

 

1

0

1

No error corection firmware.

Error corection firmware.

 

2

0

1

Serial host interface.

Parallel host interface.

 

3

0

1

No external static RAM present.

External static RAM present.

 

4

0

1

8K x 8 static RAM present.

32K x 8 static RAM present.

RESULT CODE FORMAT

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Example:

AT \V0 Q0<CR>

Description:

Selects which type of response codes are supported.

Command

Function

\V0

Enables codes selected by ATV command.

\V1

Enables Modified MNP codes.

\V2

Enables Modified V.42 codes.

RETRAIN SENSITIVITY

Type:

Register

Format:

AT [cmds] S108=n [cmds]

Example:

AT S108=1 &W<CR>

Description:

Controls the quality of retraining.

Command

Function

S108=0

Retrain disabled.

S108=1

Low quality retrain.

S108=2

Medium quality retrain.

S108=3

High quality retrain.

SRAM BUFFER

Type:

Configuration

Format:

AT [cmds] Kn [cmds]

Example:

AT K1 &W<CR>

Description:

Controls SRAM buffer for voice and fax mode.

Command

Function

K0

Disables SRAM.

K1

Enables SRAM.

SWITCH TO MNP MODE

Type:

Immediate

Format:

AT [cmds] \Z [cmds]

Example:

AT \Z &W<CR>

Description:

Switches to normal mode from MNP mode.

TEST MODES

Format

AT [cmds] S16=n [cmds]

Example:

ATS16=40<CR>

Default:

0

Range:

0-125

Unit:

Bit-mapped

Description:

Controls loopback tests, analog, digital, remote digital, and self tests.

Bit

Value

Function

0

0

1

Local analog loopback not in progress.

Local analog loopback in progress.

1

0

Not used.

2

0

1

Local digital loopback not in progress.

Local digital loopback in progress.

3

0

1

Modem not in remote digital loopback.

Remote digital loopback in progress.

4

0

1

Remote digital loopback not requested.

Remote digital loopback requested.

5

0

1

Remote digital loopback w/ self-test not in progress.

Remote digital loopback w/ self-test in progress.

6

0

1

Local analog loopback w/ self-test not in progress.

Local analog loopback w/ self-test in progress.

V.42 DETECTION PHASE

Type:

Configuration

Format:

AT [cmds] -Jn [cmds]

Example:

AT -J1 &W<CR>

Description:

Controls V.42 detection.

Command

Function

-J0

V.42 detection disabled.

-J1

V.42 detection enabled.

V.42bis COMPRESSION CONTROL

Type:

Configuration

Format:

AT [cmds] "Hn [cmds]

Example:

AT "H3 &W<CR>

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 MAXIMUM STRING LENGTH

Type:

Configuration

Format:

AT [cmds] "On [cmds]

Example:

AT "O32 <CR>

Default:

32

Range:

6 - 250

Unit:

Characters

Description:

Selects string size for V.42bis compression.

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.