IPTools.net.ua

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I & II

Data Modulation Protocol

ITU-T V.22, V.22bis, V.23, V.32, V.32bis, V.25

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

CN3

DC power

CN1

Line in

CN4

Volume

R1

RS-232/422

CN2

Power switch

SW2

DTR SIGNAL

SW1/1

Off

On

RESULT CODES

SW1/2

Off

On

RESULT CODES DISPLAY

SW1/3

On

Off

ECHO DISPLAY

SW1/4

Off

On

AUTO ANSWER

SW1/5

On

Off

CARRIER DETECT

SW1/6

Off

On

SOFTWARE RESET

Setting

SW1/7

Off

On

AT COMMAND SET

Setting

SW1/8

Enabled

On

Disabled

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Mode

Condition

AA

Red

On

Answer

Auto-answer enabled

AA

Red

Off

N/A

Auto-answer disabled

AA

Red

Blinking

N/A

Phone is ringing

CD

Red

On

N/A

Carrier signal detected

CD

Red

Off

N/A

Carrier signal not detected

RD

Red

Blinking

N/A

Modem is receiving data or sending result codes

RD

Red

Off

N/A

Modem is not receiving data

SD

Red

Blinking

N/A

Modem is transmitting data

SD

Red

Off

N/A

Modem is not transmitting data

TR

Red

On

N/A

DTR signal is high

TR

Red

Off

N/A

DTR signal is low

CS

Red

On

N/A

CTS high

CS

Red

Off

N/A

CTS normal

ARQ/FAX

Red

On

Data

Error control connection established

ARQ/FAX

Red

Blinking

Data

Error control data is being transmitted

ARQ/FAX

Red

Blinking

Fax

Modem is connected in FAX mode

BIT-MAPPED REGISTER S13

Format:

AT [cmds] S13=n [cmds]

Example:

ATS13=13<CR>

Default:

0

Range:

0 - 89

Unit:

Bit-mapped

Description:

Controls DTR reset, DTR dialing, reset dialing, and MNP3.

Bit

Function

0

Reset on low DTR.

1

Not used.

2

Not used.

3

DTR dialing enabled.

4

Reset dialing enabled.

5

Not used.

6

MNP 3 disabled.

7

Not used.

BIT-MAPPED REGISTER S15

Format:

AT [cmds] S15=n [cmds]

Example:

ATS15=13<CR>

Default:

0

Range:

0 - 56

Unit:

Bit-mapped

Description:

Controls non-error-correcting mode buffer, MNP4, and BS/DEL switch.

Bit

Function

0

Not used.

1

Not used.

2

Not used.

3

Non-error-correcting mode transmit buffer set to 128 bytes.

4

MNP 4 disabled.

5

Use backspace key for delete enabled.

BIT-MAPPED REGISTER S27

Format:

AT [cmds] S27=n [cmds]

Example:

ATS27=139<CR>

Default:

0

Range:

0 - 191

Unit:

Bit-mapped

Description:

Controls V.21, V.32 encoding and modulation, V.42 answer tone and handshake, and 9600 result codes.

Bit

Function

0

V.21 enabled.

1

V.32 trellis coding enabled.

2

V.32 modulation disabled.

3

2100Hz answer tone disabled.

5, 4

LAPM enabled.

6

Not used.

7

Force 9600 result codes.

COMPRESSION AND ERROR CORRECTION

Format:

AT [cmds] S51=n [cmds]

Example:

ATS51=3<CR>

Default:

0

Range:

0 - 7

Unit:

Bit-mapped

Description:

Selects compression and error correction for specific modulations.

Bit

Function

0

MNP/V.42 disabled during V.22 operation.

1

MNP/V.42 disabled during V.22bis operation.

2

MNP/V.42 disabled during V.32bis operation.

BIT-MAPPED REGISTER S56

Format:

AT [cmds] S56=n [cmds]

Example:

ATS56=139<CR>

Default:

0

Range:

0 - 223

Unit:

Bit-mapped

Description:

Controls non-linearing coding, TX level deviation, pre-emphasis, pre-coding, shaping, V.34, and V.FC.

Bit

Function

0

Non linearing coding disabled.

1

TX level deviation disabled.

2

Pre-emphasis disabled.

3

Pre-coding disabled.

4

Shaping disabled.

5

Not used.

6

V.34 disabled.

7

V.FC disabled.

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S21=n [cmds]

Example:

ATS21=20<CR>

Default:

10

Range:

0-255

Unit:

10 ms

Description:

Sets the length of error correction mode breaks sent from DCE to DTE in ARQ mode.

BREAK TYPE

Type:

Configuration

Format:

AT [cmds] &Yn [cmds]

Example:

AT &Y0<CR>

Description:

Configures action of break signal.

Function

Break empties buffer.

Break empties buffer and is sent immediately.

Break does not empty buffer and is sent immediately.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] &Nn [cmds]

Example:

AT &N1 DT555-1212<CR>

Description:

Sets required connection speed if &U is set to 0. Otherwise, sets fastest allowed connection speed.

Function

Variable.

300bps

1200bps

2400bps

4800bps

7200bps

9600bps

12Kbps

14.4Kbps

16.8Kbps

19.2Kbps

21.6Kbps

24Kbps

26.4Kbps

28.8Kbps

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] &Un [cmds]

Example:

AT &U1 DT555-1212<CR>

Description:

Sets slowest allowed connection speed if &N is set to 1 or higher.

Function

Disabled.

300bps

1200bps

2400bps

4800bps

7200bps

9600bps

12000bps

14400bps

16800bps

19200bps

21600bps

24000bps

26400bps

28800bps

ERROR CONTROL MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Example:

AT &M1 %C1<CR>

Description:

Selects active error-control protocols.

Function

Normal mode, error control disabled.

Normal/ARQ.

ARQ mode.

ESCAPE CHARACTER RESPONSE

Type:

Register

Format:

AT [cmds] S14=n [cmds]

Example:

ATS14=0<CR>

Default:

0

Description:

Controls reaction to escape character.

Function

Normal operation.

When +++ is received, modem goes on hook, enters command state and sends NO CARRIER result code.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] &An [cmds]

Example:

AT &A1 %C1<CR>

Description:

Selects extended result codes.

Function

Extended result codes disabled.

ARQ result codes enabled.

V.32 result code enabled.

Error correction and compression result codes enabled.

FLOW CONTROL CHARACTER - XON

Type:

Register

Format:

AT [cmds] S22=n [cmds]

Example:

ATS22=20<CR>

Default:

17

Range:

0-127

Unit:

ASCII

Description:

Sets the character used to represent XON.

FLOW CONTROL CHARACTER - XOFF

Type:

Register

Format:

AT [cmds] S23=n [cmds]

Example:

ATS23=20<CR>

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character used to represent XOFF.

FLOW CONTROL PASSTHROUGH

Type:

Configuration

Format:

AT [cmds] &In [cmds]

Example:

AT &I0 &W<CR>

Description:

Allows modem to act on, then transmit XON/XOFF characters.

Function

Software flow control disabled.

XON/XOFF passthrough enabled.

XON/XOFF passthrough disabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

AT [cmds] &Hn [cmds]

Example:

AT &H0 A<CR>

Description:

Sets type of flow control used by modem.

Function

Flow control disabled.

CTS/RTS flow control enabled.

XON/XOFF flow control enabled.

CTS/RTS and XON/XOFF flow control enabled.

HELP SCREENS

Type:

Immediate

Format:

AT <prefix>$

Example:

AT &$<CR>

Description:

Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.

Command

Function

$

Shows AT help screen.

&$

Shows AT& help screen.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S19=n [cmds]

Example:

ATS19=20<CR>

Default:

0

Range:

Unidentified

Unit:

1 minute

Description:

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

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] &Bn [cmds]

Example:

AT &N9 &B0<CR>

Description:

Sets operation of serial port speed.

Function

Serial speed follows connect speed.

Serial speed locked.

Serial speed locked in ARQ mode only.

MAPPING

Format:

AT [cmds] S55=n [cmds]

Example:

ATS55=13<CR>

Default:

0

Range:

0 - 15

Unit:

Bit-mapped

Description:

Controls mapping.

Bit

Value

Function

0

8S-2D map disabled.

1

16S-4D map disabled.

2

32S-2D map disabled.

3

64S-4D map disabled.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT I1 O<CR>

Description:

Displays modem properties.

Command

Function

I0

Reports product code.

I1

Reports ROM checksum result.

I2

Reports RAM checksum result.

I3

Reports firmware version.

I4

Reports current command settings.

I5

Reports current NVRAM settings.

I6

Reports current connection�s statistics.

I7

Reports configuration.

BAUD RATE

Format:

AT [cmds] S54=n [cmds]

Example:

ATS54=139<CR>

Default:

0

Range:

0 - 255

Unit:

Bit-mapped

Description:

Controls baud rate.

Bit

Value

Function

0

2400 baud rate disabled.

1

2743 baud rate disabled.

2

2800 baud rate disabled.

3

3000 baud rate disabled.

4

3200 baud rate disabled.

5

3429 baud rate disabled.

6

Call indicate during V.34 operation disabled.

7

V.8 during V.34 operation disabled.

TONE DIALING TEST

Type:

Register

Format:

AT [cmds] S16=n [cmds]

Example:

ATS16=1<CR>

Description:

Selects the tone dialing test

Function

Tone dialing test disabled.

Tone dialing test enabled.

V.32 AND V.32bis MODULATIONS

Format:

AT [cmds] S34=n [cmds]

Example:

ATS34=13<CR>

Default:

6

Range:

0 - 15

Unit:

Bit-mapped

Description:

Controls V.32 and V.32bis modulations.

Bit

Value

Function

0

V.32bis disabled.

1

Not used.

2

Not used.

3

V.32 modulation enabled.

V.32 HANDSHAKE TIME

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Example:

ATS28=20<CR>

Default:

8

Range:

0-255

Unit:

.1 second

Description:

Sets length of V.32 handshake.