IPTools.net.ua

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

14.4Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

16-bit ISA

Fax Class

Class I

Data Modulation Protocol

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

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

Line in

CN2

SUPPORTED COMMAND SET

Basic AT Commands

AT, �+++�, �comma�, A/

A, B, E, H, L, Q, V, Y, Z

&D, &F, &G, &M, &R, &V, &W, &X, &Y, &Z

Extended AT Commands

\A, \B, \C, \G, \J, \K, \O, \Q, \T, \U, \X, \Y, \Z

%A, %C, %E

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S18, S25, S26

Special Commands

"H, "O, -J

Note: See MHI Help File for full command documentation.

ACCEPT RELIABLE MODE

Type:

Immediate

Format:

AT [cmds] \U [cmds]

Example:

AT \U B1<CR>

Description:

Accepts remote modem�s request for reliable link.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

AT [cmds] %An [cmds]

Example:

AT%A20<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

í \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.

í %E1

Auto-retrain enabled.

%E2

Auto-retrain enabled (V.32bis comaptibility).

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14=n [cmds]

Example:

ATS14=138<CR>

Default:

138

Range:

0-174

Unit:

Bit-mapped

Description:

Controls echo, result codes, result code display, dial mode, and answer/originate mode.

Bit

Value

Function

0

0

Not used.

1

0

í 1

Command echo enabled.

2

í 0

1

Result codes disabled.

3

0

í 1

Display result codes in verbose format.

4

0

Not used.

5

í 0

1

Pulse dial enabled.

6

0

Not used.

7

0

í 1

Originate mode enabled.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21=n [cmds]

Example:

ATS21=48<CR>

Default:

48

Range:

0 - 253

Unit:

Bit-mapped

Description:

Selects CTS signal, low DTR action, DCD signal, DSR signal, and the Long Space Disconnect function.

Note: For bit 1 please see bits 1-3 of S23.

Bit

Value

Function

0, 5

00

í 01

10

DCD Unix compatibility.

1

í 0

1

Select serial speed option 2 (S23)

2

í 0

1

CTS forced high.

4, 3

00

01

í 10

11

Modem is initialized on low DTR.

6

í 0

1

DSR normal.

7

í 0

1

Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22=n [cmds]

Example:

ATS22=118<CR>

Default:

118

Range:

0-255

Unit:

Bit-mapped

Description:

Controls speaker volume and controls, and limits results codes.

Bit

Value

Function

1, 0

00

01

í 10

11

High level volume.

3, 2

00

í 01

10

11

Speaker on during handshake.

6, 5, 4

000

011

100

101

110

í 111

Busy and dialtone detection enabled, result codes 0-7, 9-20 enabled.

7

í 0

1

Pulse dialing at 33/67ms at 10pps.

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23=n [cmds]

Example:

ATS23=11<CR>

Default:

11

Range:

0-255

Unit:

Bit-mapped

Description:

Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone.

Note: Bits 1-3 are set by bit 1 in S21.

Bit

Value

Function

0

0

í 1

Remote digital loopback allowed.

3, 2, 1

000

001

010

011

í 101

110

111

Sets serial port speed to 0-300bps.

Sets serial port speed to 38400bps.

Sets serial port speed to 12Kbps.

Sets serial port speed to 115.2Kbps.

5,4

í 00

01

10

11

Mark Parity

7, 6

í 00

01

10

Guard tone 1800Hz enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Example:

AT S27=9 <CR>

Default:

64

Range:

0 - 127

Unit:

Bit-mapped

Description:

Selects synchronous/asynchronous mode, line type, V.25 answer tone, internal clock, and ITU-T/Bell modes.

Bit

Value

Function

1, 0

í 00

01

10

11

Asynchronous command mode on low DTR, synchronous connect mode on high DTR.

7, 2

í 00

01

11

Leased line autoconnect.

3

1

2 second delay prior to V.25 answer tone, used in US for answering international calls.

5, 4

í 00

01

10

Remote DCE transmit clock source.

6

0

í 1

Bell mode.

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

Modem receives \B

Break received from remote modem

\K0

Online command mode enabled, send no break to remote modem.

Break sent to remote modem and buffered cleared.

Buffers cleared, break sent to DTE.

\K1

Break sent to remote modem and buffered cleared.

Break sent to remote modem and buffered cleared.

Buffers cleared, break sent to DTE.

\K2

Online command mode enabled, send no break to remote modem.

Send break to remote modem immediately.

Break sent immediately to DTE.

\K3

Send break to remote modem immediately.

Send break to remote modem immediately.

Break sent immediately to DTE.

\K4

Online command mode enabled, send no break to remote modem.

Send break with transmitted data.

Break sent with received data to the DTE.

í \K5

Send break with transmitted data.

Send break with transmitted data.

Break sent with received data to the DTE.

BUFFER SIZE

Type:

Register

Format:

AT [cmds] S29=n [cmds]

Example:

ATS29=6<CR>

Default:

255

Range:

0-255

Unit:

2 bytes (1 word)

Description:

Selects the size of the send/receive buffer.

Note: S29=255 sets the buffer size to 1024 bytes.

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Qn [cmds]

Description:

Selects communications mode options

Command

Mode

í &Q0

Asynchronous mode, serial port speed follows connect speed.

&Q1

Asynchronous off-line command mode and synchronous connect mode.

&Q2

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

&Q3

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

COMPRESSION

Type:

Configuration

Format:

AT [cmds] %Cn [cmds]

Example:

AT *EC0 %C1 *AP0<CR>

Description:

Selects data compression.

Command

Function

%C0

Data compression disabled.

í %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

Diagnostic mode enabled.

\N2

Reliable mode enabled.

í \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.

DATA SET READY (DSR)

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Selects DSR options

Command

Function

&S0

DSR forced high

í &S1

DSR high only while modem is handshaking or connected

DIAL

Type:

Immediate

Format:

AT [cmds] D<#> [cmds]

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

DP

Pulse dialing enabled

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DS=n

Dial stored telephone number n

DT

Tone dialing enabled/Pulse dialing disabled

DW

Dialing resumed following dial tone detection

D,

Dialing paused for amount of time specified in S8 register

D!

Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.

D@

Wait for Quite 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.

D;

Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Description:

Selects modem port flow control.

Command

Function

\V0

Extended result codes disabled.

\V1

Extended result codes 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.

í \Q3

RTS/CTS flow control enabled.

HANDSHAKE TIMING

Type:

Configuration

Format:

AT [cmds] "Sn [cmds]

Example:

AT "S0 &W<CR>

Description:

Controls the time the modem waits before handshake-responding to remote modem.

Command

Function

í "S0

Modem waits 3 seconds after receiving handshake tone then responds to remote modem.

"S1

Modem waits 1.6 seconds after receiving handshake tone then responds to remote modem.

"S2

Same as "S0, then performs fast handshaking with V.32/32bis modems.

"S3

Same as "S1, then performs fast handshaking with V.32/32bis modems.

INACTIVITY TIMER

Type:

Register

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.

LOCK SERIAL PORT

Type:

Configuration

Format:

AT [cmds] \Jn [cmds]

Example:

AT %L3 %B14 \J0<CR>

Description:

Sets operation of serial port speed.

Command

Function

í \J0

Serial speed locked.

\J1

Serial speed follows connect speed.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

AT [cmds] \An [cmds]

Example:

AT \A3 &MB28800<CR>

Description:

Sets the maximum transmittable block size.

Command

Function

\A0

Maximum MNP block size is 64 characters.

\A1

Maximum MNP block size is 128 characters.

\A2

Maximum MNP block size is 192 characters.

í \A3

Maximum MNP block size is 256 characters.

ON-LINE

Type:

Immediate

Format:

AT [cmds] On [cmds]

Description:

Controls on-line command (data transmission) state options.

Command

Function

O0

Return to on-line command mode.

O1

Return to on-line command mode with retraining enabled.

O2

Fall back, return to online command mode.

O3

Fall forward, return to online command mode.

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.

PROTOCOL/SPEED

Type:

Register

Format:

AT [cmds] S31=n [cmds]

Example:

AT S31=10 <CR>

Description:

Selects the current DCE speed.

Command

Function

í S37=0

Select last ATspeed.

S37=3

Select 300bps speed.

S37=5

Select 1200bps speed.

S37=6

Select 2400bps speed.

S37=7

Select 4800bps speed.

S37=8

Select 7200bps speed.

S37=9

Select 9600bps speed.

S37=10

Select 12Kbps speed.

S37=11

Select 14.4Kbps speed.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays information requested

Command

Function

I0

Reports modem model and speed

I1

Reports ROM checksum

I2

Tests and reports ROM checksum

I3

Reports manufacturer and model information

I4

Reports data connection information

RETRAIN COUNTER

Type:

Register

Format:

AT [cmds] S30=n [cmds]

Example:

ATS30=6<CR>

Default:

0

Range:

0-255

Unit:

1 retrain

Description:

Counts the number of times the modem attempted to retrain since power-up.

SELECT CALL PROGRESS RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables selection of tone detection and associated result code format options

Command

Function

X0

Busy and dial tone detection disabled; result codes 0 - 4 enabled.

X1

Busy and dial tone detection disabled; result codes 0 - 5 & 9 - 20 enabled.

X2

Busy tone detection disabled, dial tone detection enabled; result codes 0 - 6 & 9 - 20 enabled.

X3

Busy tone detection enabled, dial tone detection disabled; result codes 0 - 5, 7 & 9 - 20 enabled.

í X4

Busy and dial tone detection enabled; result codes 0 - 7 & 9 - 20 enabled.

X5

Busy and dial tone detection enabled; result codes 0, 4, 6 & 7 enabled.

SPEAKER MODE

Type:

Configuration

Format:

AT [cmds] Mn [cmds]

Description:

Selects various speaker options

Command

Function

M0

Speaker disabled

í M1

Speaker enabled until carrier signal detected

M2

Speaker enabled

M3

Speaker enabled following dialing, then disabled after carrier signal detected.

M4

Speaker enabled until carrier signal detected, on during retrain.

M5

Speaker enabled following dialing, then disabled after carrier signal detected, on during retrain.

SWITCH TO MNP MODE

Type:

Configuration

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

í 0

1

Local analog loopback in progress.

1

0

Not used.

2

í 0

1

Local digital loopback in progress.

3

í 0

1

Remote digital loopback in progress.

4

í 0

1

Remote digital loopback requested.

5

í 0

1

Remote digital loopback w/ self-test in progress.

6

í 0

1

Local analog loopback w/ self-test in progress.

TEST MODES

Type:

Immediate

Format:

AT [cmds] &Tn

Description:

Selects test options

Command

Function

&T0

End current test

&T1

End current test

&T8

Begin local analog loopback and self-test

TIMED MNP RELIABLE CONNECTION

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Example:

ATS28=8<CR>

Default:

8

Range:

0-255

Unit:

1 second

Description:

Controls the time the modem takes to make a MNP reliable connection, if the threshold is exceeded the modem falls back to a normal connection.

Note: S28=0 sets the factory default, 8 seconds. S28=(1-4) causes the modem to make a normal connection.

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.

í -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.

í "H3

V.42bis when transmitting/receiving enabled.

V.42bis MAXIMUM STRING LENGTH

Type:

Immediate

Format:

AT [cmds] "O=n [cmds]

Example:

AT "O=32 <CR>

Default:

250

Range:

6 - 250

Unit:

Unidentified

Description:

Selects string size for V.42bis compression.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

AT [cmds] \Xn [cmds]

Example:

AT \X0<CR>

Description:

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

Command

Function

í \X0

XON/XOFF signals trapped by local modem.

\X1

XON/XOFF passed through local modem.