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V.3400

MOTOROLA, INC.

V.3400

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I

Data Modulation Protocol

Bell 103A/212A

ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.33, V.34

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

YES button

BT1

Leased line out

CN2

NO button

BT2

RS-232/422

CN3

TALK/DATA button

BT3

Fuse

FUSE

Switched line out

CN1

Power switch

SW1

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

CS

Red

On

CTS signal is high

CS

Red

Off

CTS signal is low

RS

Red

On

RTS signal is high

RS

Red

Off

RTS signal is low

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

TD

Red

On

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

Proprietary AT Command Set

ANSWER/ORIGINATE MODE

Type:

Configuration

Format:

AT [cmds] *ORn [cmds]

Example:

AT *OR0<CR>

Description:

Selects whether the modem is in answer or originate mode.

Command

Function

» *OR0

Modem is in originate mode.

*OR1

Modem is in answer mode.

AUTO-ANSWER OVERRIDE

Type:

Immediate

Format:

AT [cmds] *IC [cmds]

Example:

AT *IC<CR>

Description:

Instructs the modem to ignore the incoming call, if the modem is set to automatically answer.

AUTODIALING STORED NUMBER

Type:

Configuration

Format:

AT [cmds] *AUn [cmds]

Example:

AT *AU4 *CN4,1(303)443-3388<CR>

Description:

Sets the autodialing function to dial the number stored in memory location n.

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.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Register

Format:

AT [cmds] S64=n [cmds]

Example:

ATS64=20<CR>

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character. S64=0 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

» \C0

Data is discarded.

\C1

Data is buffered.

AUTO-RETRAIN

Type:

Configuration

Format:

AT %En

Example:

AT %E1 *MM12<CR>

Description:

Selects auto-retrain mode.

Command

Function

%E0

Auto-retrain disabled.

» %E1

Auto-retrain enabled.

BIT-MAPPED REGISTER S14

Format

AT [cmds] S14=n [cmds]

Example:

ATS14=40<CR>

Default:

138

Range:

0 - 190

Unit:

Bit-mapped

Description:

Controls command echo, result codes, dialing mode, and answer/originate mode.

Bit

Value

Function

0

0

Not used.

1

0

» 1

Command echo off.

Command echo on.

2

» 0

1

Result codes enabled.

Result codes disabled.

3

0

» 1

Numeric result codes.

Verbose result codes.

4

» 1

Not used.

5

» 0

1

Tone dialing selected.

Pulse dialing selected.

6

0

Not used.

7

0

» 1

Answer mode selected.

Originate mode selected.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21=n [cmds]

Example:

ATS21=1<CR>

Default:

132

Range:

0 - 255

Unit:

Bit-mapped

Description:

Controls low DTR action, DCD signal, and the Long Space Disconnect function.

Note:

Be aware that the bits are out of order.

Bit

Value

Function

6, 0

» 00

01

10

11

DSR forced high.

DSR normal, except forced low on disconnect.

DSR normal.

DSR follows OH.

5, 1

» 00

01

10

11

CD forced high.

CD forced high except during disconnect.

CD normal.

CD follows remote RTS signal.

2

0

» 1

CTS normal.

CTS forced high.

4, 3

» 00

01

10

11

DTR signal ignored.

Modem goes to command mode on low DTR.

Modem disconnects on low DTR.

Modem resets on low DTR.

7

0

» 1

Long Space Disconnect function disabled.

Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S22

Format

AT [cmds] S22=n [cmds]

Example:

ATS22=114<CR>

Default:

70

Range:

0 - 255

Unit:

Bit-mapped

Description:

Controls volume and speaker settings, result codes, and make/break pulse ratio.

Bit

Value

Function

1, 0

00

01

» 10

11

Lowest volume setting.

Low volume setting.

Medium volume setting

Highest volume setting.

3, 2

00

» 01

10

11

Speaker disabled.

Speaker enabled until carrier signal detected

Speaker enabled.

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

6, 5 ,4

000

001

010

011

» 100

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

Pulse dialing at 39/61ms at 10pps.

Pulse dialing at 33/67ms at 10pps.

BIT-MAPPED REGISTER S23

Format

AT [cmds] S23=n [cmds]

Example:

ATS23=177<CR>

Default:

1

Range:

0 - 129

Unit:

Bit-mapped

Description:

Grants/denies remote digital loopback and sets guard tone.

Bit

Value

Function

0

0

» 1

Remote digital loopback denied.

Remote digital loopback allowed.

1

0

Not used.

2

0

Not used.

3

0

Not used.

4

0

Not used.

5

0

Not used.

7, 6

» 00

01

10

Guard tone disabled.

Guard tone at 500Hz enabled.

Guard tone at 1800Hz enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Example:

ATS27=9<CR>

Default:

9

Range:

0 - 127

Unit:

Bit-mapped

Description:

Selects sync/async mode, line type, clock source, and ITU-T/Bell modes.

Bit

Value

Function

1, 0

00

01

» 10

11

Asynchronous command and data modes.

Asynchronous command, synchronous connect mode.

DTR dialing enabled, synchronous connect mode.

Manual dialing only, synchronous connect mode.

2

» 0

1

Switched line.

Leased line.

3

0

Not used.

5, 4

» 00

01

10

Internal DTE transmit clock source.

External DTE transmit clock source.

Slave DTE transmit clock source.

6

» 0

1

DTR dialing enabled.

DTR dialing disabled.

BIT-MAPPED REGISTER S29

Format

AT [cmds] S29=n [cmds]

Example:

ATS29=4<CR>

Default:

0

Range:

0 - 135

Unit:

Bit-mapped

Description:

Controls command set, option retaining, V.32 fast handshaking, and DTE fallback.

Bit

Value

Function

0

» 0

1

AT command set enabled.

AT command set disabled.

1

» 0

1

Modem will not reset on disconnect.

Modem will reset on disconnect.

2

» 0

1

Normal V.32 handshake sequence.

Training time is shortened by 2 seconds in V.32 and V.32bis modes.

3

0

Not used.

4

0

Not used.

5

0

Not used.

6

0

Not used.

7

» 0

1

DTR dialing enabled.

DTR dialing disabled.

BIT-MAPPED REGISTER S32

Format

AT [cmds] S32=n [cmds]

Example:

ATS32=14<CR>

Default:

6

Range:

0 - 15

Unit:

Bit-mapped

Description:

Controls line type, disconnect on loss of current, and leased line backup mode.

Bit

Value

Function

0

» 0

1

2-wire leased line.

4-wire leased line.

2, 1

00

01

» 11

Do not disconnect on loss of current.

Disconnect after 8ms if current is lost.

Disconnect after 90ms if current is lost.

3

» 0

1

Modem will restore leased line connection only when modem receives *LB or *LD.

Modem will restore leased line connection automatically.

BIT-MAPPED REGISTER S60

Format

AT [cmds] S60=n [cmds]

Example:

ATS60=4<CR>

Default:

67

Range:

0 - 199

Unit:

Bit-mapped

Description:

Controls auto-retrain, MNP, auto-reliable time buffering, RI signal, and extended result codes.

Bit

Value

Function

0

0

» 1

Auto-retrain disabled.

Auto-retrain enabled.

1

0

» 1

MNP disabled.

MNP enabled.

2

» 0

1

Data is discarded during auto-relaible time.

Data is buffered during auto-relaible time.

5 - 3

0

Not used.

6

0

» 1

RI signal high during rings, and forced high for duration of call.

RI signal high during rings only.

7

» 0

1

Extended result codes disabled.

Extended result codes enabled.

BIT-MAPPED REGISTER S70

Format

AT [cmds] S70=n [cmds]

Example:

ATS70=7<CR>

Default:

15

Range:

0 - 15

Unit:

Bit-mapped

Description:

Controls connect mode and V.42 negotiation mode.

Bit

Value

Function

2, 1, 0

000

001

010

011

100

101

110

» 111

Normal mode enabled.

Direct mode enabled.

MNP mode only enabled.

MNP mode with fallback to normal mode enabled.

LAP-M mode only enabled.

LAP-M mode with fallback to normal mode enabled.

LAP-M mode with fallback to MNP enabled.

LAP-M mode with fallback to MNP and normal modes enabled.

3

0

» 1

Normal V.42 handshaking enabled.

Fast V.42 handshaking enabled.

BIT-MAPPED REGISTER S72

Format

AT [cmds] S72=n [cmds]

Example:

ATS72=7<CR>

Default:

0

Range:

0 - 137

Unit:

Bit-mapped

Description:

Controls serial port lock, CTS signal, and autocallback function.

Bit

Value

Function

0

» 0

1

Serial speed locked.

Serial speed follows connect speed.

2 - 1

0

Not used.

3

» 0

1

CTS normal.

CTS follows CD.

6 - 4

0

Not used.

7

» 0

1

Autocallback disabled.

Autocallback enabled. The modem, upon detecting an incoming call, will dial the default number and connect with it instead of the incoming call.

BIT-MAPPED REGISTER S84

Format

AT [cmds] S84=n [cmds]

Example:

ATS84=7<CR>

Default:

0

Range:

0 - 93

Unit:

Bit-mapped

Description:

Controls disconnect during handshaking, V.22 fallback, answerback, dial backup trigger, and frame tracking.

Bit

Value

Function

0

» 0

1

Disconnect if key is pressed during handshaking.

Do not disconnect if key is pressed during handshaking.

1

0

Not used.

2

» 0

1

Normal fallback to V.22.

Fast fallback to V.22.

3

» 0

1

Normal answerback.

Fast answerback.

4

» 0

1

DTR signal must go from low to high four times for dial backup to occur.

DTR signal must go from low to high once for dial backup to occur.

5

0

Not used.

6

» 0

1

Frame tracking disabled.

Frame tracking enabled.

BREAK SEND

Type:

Configuration

Format:

AT [cmds] \Bn [cmds]

Example:

AT \B50 O<CR>

Default:

35

Range:

1-255

Unit:

20ms

Description:

Sends break to modem.

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S79=n [cmds]

Example:

ATS79=20<CR>

Default:

35

Range:

0 - 255

Unit:

20 ms

Description:

Sets the length of breaks sent from DCE to DTE.

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.

BREAK TYPE

Type:

Register

Format:

AT [cmds] S59=n [cmds]

Example:

AT S59=1 <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

S59=0

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.

S59=1

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.

S59=2

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.

S59=3

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to DTE immediately.

S59=4

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.

» S59=5

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.

CD SIGNAL

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Example:

AT &C3 *RS1 *SR1<CR>

Description:

Configures the behavior of the carrier detect signal.

Command

Function

» &C0

CD forced high.

&C1

CD normal.

&C2

CD forced high except during disconnect.

&C3

CD follows remote RTS signal.

CHARACTER LENGTH AND PARITY

Format

AT [cmds] S61? [cmds]

Example:

ATS61?<CR>

Default:

Read-only

Range:

0 - 56

Unit:

Bit-mapped

Description:

Reports current character length and parity.

Bit

Value

Meaning

2 - 0

0

Not used.

3

0

» 1

7 bit character length set.

8 bit character length set.

5, 4

» 00

01

10

11

MARK parity.

No parity.

Odd parity.

Even parity.

COMMAND SET

Type:

Configuration

Format:

AT [cmds] *NTn [cmds]

Example:

AT *NT0<CR>

Description:

Disables the AT command set.

Note:

To re-enable the command set, power down the modem and then cycle power seven times. The modem must remain powered on each time at least one second but not more than five.

Command

Function

» *NT0

Command set disabled.

*NT1

Command set enabled.

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Example:

AT &M2 H1 DT555-1212<CR>

Description:

Selects the active communications mode.

Command

Function

» &M0

Asynchronous command and data modes.

&M1

Asynchronous command, synchronous connect mode.

&M2

DTR dialing enabled, synchronous connect mode.

&M3

Manual dialing only, synchronous connect mode.

&M4

V.25bis bisynchronous command, synchronous connect mode.

&M5

V.25bis SDLC command, synchronous connect mode.

&M6

V.25bis asynchronous command, synchronous connect mode.

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.

%C2

Data compression enabled on transmit only.

%C3

Data compression enabled on receive only.

COMPRESSION

Type:

Register

Format:

AT S56=n

Example:

AT *EC0 S56=1 *AP0<CR>

Description:

Selects data compression.

Command

Function

S56=0

Data compression disabled.

S56=1

Data compression enabled on transmit only.

S56=2

Data compression enabled on receive only.

» S56=3

Data compression enabled.

COMPRESSION AND ERROR CORRECTION - CURRENT

Type:

Register

Format:

AT [cmds] S71? [cmds]

Example:

AT S71?<CR>

Default:

Read-only

Description:

Reports current compression and error correction protocols.

Value

Meaning

0

No compression or error correction protocols active.

1

Negotiation in progress.

2

MNP2 active.

3

MNP3 active.

4

MNP4 active.

5

MNP5 active.

6

V.42 active.

7

V.42bis active.

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

LAP-M mode only enabled.

\N5

LAP-M mode with fallback to normal mode enabled.

\N6

LAP-M mode with fallback to MNP enabled.

» \N7

LAP-M mode with fallback to MNP and normal modes enabled.

CONNECTION SPEED - CURRENT

Type:

Register

Format:

AT [cmds] S67? [cmds]

Example:

AT S67?<CR>

Default:

Read-only

Description:

Reports current connection speed.

Value

Meaning

1

300bps current speed.

3

1200bps current speed.

4

2400bps current speed.

5

4800bps current speed.

6

7200bps current speed.

7

9600bps uncoded current speed.

8

9600bps current speed.

9

12Kbps current speed.

10

14.4Kbps current speed.

11

16.8Kbps current speed.

12

19.2Kbps current speed.

13

21.6Kbps current speed.

14

24Kbps current speed.

15

26.4Kbps current speed.

16

28.8Kbps current speed.

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] %Ln [cmds]

Example:

AT %L3 %B14 \J0<CR>

Description:

Sets slowest allowed connection speed.

Command

Function

» %L0

No minimum speed.

%L2

Select 1200bps minimum speed.

%L3

Select 2400bps minimum speed.

%L4

Select 4800bps minimum speed.

%L5

Select 9600bps uncoded minimum speed.

%L6

Select 9600bps minimum speed.

%L7

Select 7200bps minimum speed.

%L8

Select 12Kbps minimum speed.

%L9

Select 14.4Kbps minimum speed.

%L11

Select 16.8Kbps minimum speed.

%L12

Select 19.2Kbps minimum speed.

%L13

Select 21.6Kbps minimum speed.

%L14

Select 24Kbps minimum speed.

%L15

Select 26.4Kbps minimum speed.

%L16

Select 28.8Kbps minimum speed.

CONNECTION SPEED LOWER LIMIT

Type:

Configuration

Format:

AT [cmds] S81=n [cmds]

Example:

AT %L3 S81=14 \J0<CR>

Description:

Sets slowest allowed connection speed.

Command

Function

S81=0

No minimum speed.

S81=3

Select 1200bps minimum speed.

S81=4

Select 2400bps minimum speed.

S81=5

Select 4800bps minimum speed.

S81=6

Select 7200bps minimum speed.

S81=7

Select 9600bps uncoded minimum speed.

S81=8

Select 9600bps minimum speed.

S81=9

Select 12Kbps minimum speed.

S81=10

Select 14.4Kbps minimum speed.

S81=11

Select 16.8Kbps minimum speed.

S81=12

Select 19.2Kbps minimum speed.

S81=13

Select 21.6Kbps minimum speed.

S81=14

Select 24Kbps minimum speed.

S81=15

Select 26.4Kbps minimum speed.

S81=16

Select 28.8Kbps minimum speed.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] %Bn [cmds]

Example:

AT %L3 %B14 \J0<CR>

Description:

Sets fastest allowed connection speed.

Command

Function

%B0

Follow serial port speed.

%B1

Select 300bps maximum speed.

%B2

Select 1200bps maximum speed.

%B3

Select 2400bps maximum speed.

%B4

Select 4800bps maximum speed.

%B5

Select 9600bps uncoded maximum speed.

%B6

Select 9600bps maximum speed.

%B7

Select 7200bps maximum speed.

%B8

Select 12Kbps maximum speed.

» %B9

Select 14.4Kbps maximum speed.

%B11

Select 16.8Kbps maximum speed.

%B12

Select 19.2Kbps maximum speed.

%B13

Select 21.6Kbps maximum speed.

%B14

Select 24Kbps maximum speed.

%B15

Select 26.4Kbps maximum speed.

%B16

Select 28.8Kbps maximum speed.

CONNECTION SPEED UPPER LIMIT

Type:

Configuration

Format:

AT [cmds] S69=n [cmds]

Example:

AT %L3 S69=14 \J0<CR>

Description:

Sets fastest allowed connection speed.

Command

Function

S69=0

Follow serial port speed.

S69=1

Select 300bps maximum speed.

S69=3

Select 1200bps maximum speed.

S69=4

Select 2400bps maximum speed.

S69=5

Select 4800bps maximum speed.

S69=6

Select 7200bps maximum speed.

S69=7

Select 9600bps uncoded maximum speed.

S69=8

Select 9600bps maximum speed.

S69=9

Select 12Kbps maximum speed.

» S69=10

Select 14.4Kbps maximum speed.

S69=11

Select 16.8Kbps maximum speed.

S69=12

Select 19.2Kbps maximum speed.

S69=13

Select 21.6Kbps maximum speed.

S69=14

Select 24Kbps maximum speed.

S69=15

Select 26.4Kbps maximum speed.

S69=16

Select 28.8Kbps maximum speed.

CTS SIGNAL

Type:

Configuration

Format:

AT [cmds] &Rn [cmds]

Example:

AT &R0<CR>

Description:

Selects the function of the CTS signal.

Command

Function

&R0

CTS normal.

» &R1

CTS forced high.

&R2

CTS follows CD.

&R9

CTS follows RTS.

DISCONNECT BUFFER DELAY

Type:

Configuration

Format:

AT [cmds] %Dn [cmds]

Example:

AT %D0<CR>

Default:

0

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers.

DISCONNECT BUFFER DELAY

Type:

Register

Format:

AT [cmds] S62=n [cmds]

Example:

AT S62=0<CR>

Default:

0

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers.

DISCONNECT ON LOSS OF CURRENT

Type:

Configuration

Format:

AT [cmds] *LCn [cmds]

Example:

AT*LC0<CR>

Description:

Causes the modem to disconnect if the telephone line’s current drops.

Command

Function

*LC0

Do not disconnect on loss of current.

*LC1

Disconnect after 8ms if current is lost.

» *LC2

Disconnect after 90ms if current is lost.

DISCONNECT RESET

Type:

Configuration

Format:

AT [cmds] *ROn [cmds]

Example:

AT*RO0<CR>

Description:

Selects whether the modem will reset on disconnect.

Command

Function

» *RO0

Modem will not reset on disconnect.

*RO1

Modem will reset on disconnect.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

AT [cmds] *ND [cmds]

Example:

AT*CN3,555-1212 *ND<CR>

Description:

Displays all stored phone numbers.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Example:

AT &S0<CR>

Description:

Selects the function of the DSR signal.

Command

Function

» &S0

DSR forced high.

&S1

DSR normal.

&S2

DSR normal, except forced low on disconnect.

&S3

DSR follows OH.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] \Vn [cmds]

Example:

AT \V1 %C1<CR>

Description:

Selects extended result codes.

Command

Function

» \V0

Extended result codes disabled.

\V1

Extended result codes enabled.

EXTENDED RESULT CODES

Type:

Configuration

Format:

AT [cmds] S82=n [cmds]

Example:

AT %L3 S82=4 \J0<CR>

Description:

Selects extended result codes.

Command

Function

» S82=0

Display DTE rate; extended result codes disabled.

S82=4

Display DCE rate; extended result codes enabled.

S82=8

Display DCE rate; extended result codes disabled.

FACTORY DEFAULTS

Type:

Immediate

Format:

AT &Fn

Example:

AT &F8<CR>

Default:

1

Range:

1-9

Description:

Loads factory defaults set n.

FLOW CONTROL

Type:

Configuration

Format:

AT [cmds] \Gn [cmds]

Example:

AT G1 &M0<CR>

Description:

Selects modem port flow control.

Command

Function

» \G0

Flow control disabled.

\G1

Flow control enabled.

FLOW CONTROL CHARACTER - XOFF FROM TERMINAL

Type:

Register

Format:

AT [cmds] S45=n [cmds]

Example:

ATS45=22<CR>

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character the terminal sends to represent XOFF.

FLOW CONTROL CHARACTER - XON FROM TERMINAL

Type:

Register

Format:

AT [cmds] S44=n [cmds]

Example:

ATS44=20<CR>

Default:

17

Range:

0-127

Unit:

ASCII

Description:

Sets the character the terminal sends to represent XON.

FLOW CONTROL CHARACTER - XOFF TO TERMINAL

Type:

Register

Format:

AT [cmds] S50=n [cmds]

Example:

ATS50=23<CR>

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character the modem sends to represent XOFF.

FLOW CONTROL CHARACTER - XON TO TERMINAL

Type:

Register

Format:

AT [cmds] S49=n [cmds]

Example:

ATS49=21<CR>

Default:

17

Range:

0-127

Unit:

ASCII

Description:

Sets the character the modem sends to represent XON.

FLOW CONTROL MODE

Format

AT [cmds] S54=n [cmds]

Example:

ATS54=35<CR>

Default:

33

Range:

0 - 123

Unit:

Bit-mapped

Description:

Controls flow control type and pass-through.

Bit

Value

Function

1, 0

00

» 01

10

11

Flow control disabled.

Bidirectional XON/XOFF flow control enabled.

CTS flow control by DCE enabled.

Bidirectional CTS/RTS flow control enabled.

2

0

Not used.

3

» 0

1

Flow control disabled.

Flow control enabled.

4

» 0

1

XON/XOFF signals trapped by local modem.

XON/XOFF passed through local modem.

6, 5

00

» 01

10

11

Flow control by DCE disabled.

XON/XOFF flow control by DCE enabled.

RTS flow control by DCE enabled.

RTS flow control by DCE 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

Flow control by DCE disabled.

» \Q5

XON/XOFF flow control by DCE enabled.

\Q6

RTS flow control by DCE enabled.

\Q7

RTS flow control by DCE enabled.

FORCE RETRAIN

Type:

Immediate

Format:

AT [cmds] *RRn [cmds]

Example:

AT *RR14 O<CR>

Description:

Forces the modem to attempt to retrain to the selected speed.

Command

Function

*RR0

Attempt 2400bps speed.

*RR1

Attempt 4800bps speed.

*RR2

Attempt 7200bps speed.

*RR3

Attempt 9600bps speed.

*RR4

Attempt 12Kbps speed.

*RR5

Attempt 14.4Kbps speed.

*RR6

Attempt 16.8Kbps speed.

*RR7

Attempt 19.2Kbps speed.

*RR8

Attempt 21.6Kbps speed.

*RR9

Attempt 24Kbps speed.

*RR10

Attempt 26.4Kbps speed.

*RR11

Attempt 28.8Kbps speed.

HANG UP MODE

Type:

Configuration

Format:

AT [cmds] Hn [cmds]

Example:

AT H3 O<CR>

Description:

Selects how the modem will hang up.

Command

Function

» H2

Set hang up mode to normal on next ATH command.

H3

Set hang up mode to fast on next ATH command.

HELP SCREENS

Type:

Immediate

Format:

AT $H=xxxx

Example:

AT $H=MNP<CR>

Description:

Shows modem help screens. If a string is included as shown in the example, the modem will perform a search for the string; otherwise, the whole help section will be displayed.

INACTIVITY TIMER

Type:

Register

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.

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S58=n [cmds]

Example:

AT S58=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.

LEASED LINE BACKUP NUMBER

Type:

Register

Format:

AT [cmds] S35=n [cmds]

Example:

AT S35=3<CR>

Description:

Sets the memory location the modem will dial for DTR dialing and leased-line backup.

LEASED LINE BACKUP RECOVERY DELAY

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Example:

ATS28=5<CR>

Default:

15

Range:

0-255

Unit:

1 minute

Description:

After leased line failure, modem attempts to reconnect after specified delay.

LEASED LINE BACKUP - RESTORAL OPTIONS

Type:

Configuration

Format:

AT [cmds] *DBn [cmds]

Example:

AT *DB0 D555-1212<CR>

Description:

Selects what will initiate the restoral of a leased line connection.

Command

Function

» *DB0

Modem will restore connection only when modem receives *LB or *LD.

*DB1

Modem will restore connection automatically.

LEASED LINE BACKUP - RESTORE

Type:

Configuration

Format:

AT [cmds] *LB [cmds]

Example:

AT *OR1 *LB <CR>

Description:

Commands the modem to attempt to restore the leased line connection, or to wait for a leased line call if in answer-only mode.

LEASED LINE BACKUP - RESTORE MANUALLY

Type:

Configuration

Format:

AT [cmds] *LD [cmds]

Example:

AT *OR0 *LD <CR>

Description:

Commands the modem to dial the default number to restore the leased line connection.

LEASED LINE TRANSMISSION LEVEL

Type:

Configuration

Format:

AT [cmds] *TLn [cmds]

Example:

AT *TL15<CR>

Default:

0

Range:

0 - 30

Unit:

-1 dBm

Description:

Sets the signal level for transmission when in leased line mode.

LEASED LINE TRANSMISSION LEVEL

Type:

Register

Format:

AT [cmds] S52=n [cmds]

Example:

AT S52=15<CR>

Default:

0

Range:

0 - 30

Unit:

-1 dBm

Description:

Sets the signal level for transmission when in leased line mode.

LINE TYPE

Type:

Configuration

Format:

AT [cmds] &Ln [cmds]

Example:

AT &L2 H1 DT555-1212<CR>

Description:

Selects line type.

Command

Function

» &L0

Switched line.

&L1

2-wire leased line.

&L2

4-wire leased line.

LOCAL SERIAL PORT SPEED CHANGE ON PIN 23

Type:

Configuration

Format:

AT [cmds] *FBn [cmds]

Example:

AT *FB1<CR>

Description:

Selects whether a voltage transition on pin 23 will cause the modem to change the serial port speed.

Command

Function

» *FB0

Pin 23 transition ignored.

*FB1

Pin 23 negative causes modem to increase serial port speed; pin 23 positive causes modem to decrease serial port speed.

LOCAL SERIAL PORT SPEED - CURRENT

Type:

Configuration

Format:

AT [cmds] S80=n [cmds]

Example:

AT %L3 S80=14 \J0<CR>

Description:

Reports the current serial port speed.

Command

Function

1

300bps current speed.

2

600bps current speed.

3

1200bps current speed.

4

2400bps current speed.

5

4800bps current speed.

6

7200bps current speed.

7

9600bps current speed.

8

12Kbps current speed.

9

14.4Kbps current speed.

10

16.8Kbps current speed.

11

19.2Kbps current speed.

12

21.6Kbps current speed.

13

24Kbps current speed.

14

26.4Kbps current speed.

15

28.8Kbps current speed.

16

38.4Kbps current speed.

17

57.6Kbps current speed.

18

115.2Kbps current speed.

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

» \J0

Serial speed locked.

\J1

Serial speed follows connect speed.

LOOPBACK TEST ON PIN 18

Type:

Configuration

Format:

AT [cmds] *LAn [cmds]

Example:

AT*LA0<CR>

Description:

Controls whether the modem will perform a local analog loopback test when pin 18 goes high.

Command

Function

» *LA0

Pin 18 has no function.

*LA1

Pin 18 going high causes the modem to perform local analog loopback test.

LOOPBACK TEST ON PIN 21

Type:

Configuration

Format:

AT [cmds] *RDn [cmds]

Example:

AT*RD0<CR>

Description:

Controls whether the modem will perform a remote digital loopback test when pin 21 goes high.

Command

Function

» *RD0

Pin 21 has no function.

*RD1

Pin 21 going high causes the modem to perform remote digital loopback test.

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.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Register

Format:

AT [cmds] S63=n [cmds]

Example:

AT S63=3 %C1<CR>

Description:

Sets the maximum transmittable block size.

Command

Function

S63=0

MNP block size is 64 characters.

S63=1

MNP block size is 128 characters.

S63=2

MNP block size is 192 characters.

» S63=3

MNP block size is 256 characters.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] *MMn [cmds]

Example:

AT %E1 *MM12<CR>

Description:

Selects the current protocol.

Command

Function

*MM0

Selects all protocols.

*MM1

Selects V.21 only.

*MM2

Selects Bell 103 only.

*MM3

Selects Bell 212 only.

*MM5

Selects V.22bis only.

*MM6

Selects V.27bis only.

*MM8

Selects V.29 only.

*MM10

Selects V.33 only.

*MM11

Selects V.32bis only.

*MM12

Selects V.34 only.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] S88=n [cmds]

Example:

AT %E1 S88=12<CR>

Description:

Selects the current protocol.

Command

Function

S88=0

Selects all protocols.

S88=1

Selects V.21 only.

S88=2

Selects Bell 103 only.

S88=3

Selects Bell 212 only.

S88=5

Selects V.22bis only.

S88=6

Selects V.27bis only.

S88=8

Selects V.29 only.

S88=10

Selects V.33 only.

S88=11

Selects V.32bis only.

S88=12

Selects V.34 only.

PROTOCOL/SPEED - CURRENT

Type:

Configuration

Format:

AT [cmds] S91? [cmds]

Example:

AT %E1 S91?<CR>

Description:

Reports the current protocol.

Value

Meaning

0

Modem will select protocol automatically.

1

V.21 only selected.

2

Bell 103 only selected.

3

Bell 212 only selected.

5

V.22bis only selected.

6

V.27bis only selected.

8

V.29 only selected.

10

V.33 only selected.

11

V.32bis only selected.

12

V.34 only selected.

REMOTE CONFIGURATION

Type:

Configuration

Format:

AT [cmds] %T=n [cmds]

AT [cmds] D<#>%Tn [cmds]

Example:

AT &V2 %T=102475

AT D555-1212%T102475<CR>

Description:

Initiates a remote configuration session. This command may follow a dial command, omitting the equal sign, to initiate remote configuration immediately on connection. %T with no parameter will quit the current session.

REMOTE CONFIGURATION PASSWORD

Type:

Configuration

Format:

AT [cmds] %P=nnnn [cmds]

Example:

AT %P=102475 D555-1212<CR>

Default:

N/A

Range:

0-99999999, D, <none>

Description:

Sets the security code for remote configuration sessions. If nnnn is omitted, the code will be cleared; if a D is given, remote configuration is disabled.

REPORT INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Example:

AT I3 &V1 %V<CR>

Description:

Displays modem properties.

Command

Function

I0

Reports modem model and speed.

I1

Reports checksum number.

I3

Reports firmware version.

I4

Reports feature code.

I5

Reports reason for last disconnect.

REPORT INFORMATION AND CONFIGURATION PROFILE

Type:

Immediate

Format:

AT [cmds] &Vn [cmds]

Example:

AT I3 &V1 %V<CR>

Description:

Reports configuration profiles and other information.

Command

Function

&V0

Report configuration profiles.

&V1

Report connection status and internal modem information.

&V2

Report active configuration profile.

REPORT PRODUCT VERSION

Type:

Immediate

Format:

AT [cmds] %V [cmds]

Example:

AT I3 &V1 %V<CR>

Description:

Reports product version.

REPORT SERIAL NUMBER

Type:

Immediate

Format:

AT [cmds] $V [cmds]

Example:

AT I3 &V1 $V<CR>

Description:

Reports product serial number.

RESULT CODE MODE

Type:

Configuration

Format:

AT [cmds] *RCn [cmds]

Example:

AT *RC0<CR>

Description:

Selects normal or Motorola result code numbering.

Command

Function

» *RC0

Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard).

*RC1

Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola).

RESULT CODE MODE

Type:

Register

Format:

AT [cmds] S57=n [cmds]

Example:

AT S57=0<CR>

Description:

Selects normal or Motorola result code numbering.

Command

Function

» S57=0

Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard).

S57=1

Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola).

RETRAIN SENSITIVITY

Type:

Configuration

Format:

AT [cmds] %Rn [cmds]

Example:

AT &C3 %R1<CR>

Description:

Sets how poor line conditions must be before the modem will initiate a retrain.

Command

Function

» %R0

Modem will not initiate retrain.

%R1

Modem will initiate retrain when the Bit Error Rate exceeds 10-5 for eight seconds, or for one second in V.22bis mode.

%R2

Modem will initiate retrain when the Bit Error Rate exceeds 10-4 for eight seconds, or for one second in V.22bis mode.

%R3

Modem will initiate retrain when the Bit Error Rate exceeds 10-3 for eight seconds, or for one second in V.22bis mode.

RETRAIN SENSITIVITY

Type:

Register

Format:

AT [cmds] S53=n [cmds]

Example:

AT &C3 S53=1<CR>

Description:

Sets how poor line conditions must be before the modem will initiate a retrain.

Command

Function

» S53=0

Modem will not initiate retrain.

S53=4

Modem will initiate retrain when the Bit Error Rate exceeds 10-5 for eight seconds, or for one second in V.22bis mode.

S53=8

Modem will initiate retrain when the Bit Error Rate exceeds 10-4 for eight seconds, or for one second in V.22bis mode.

S53=12

Modem will initiate retrain when the Bit Error Rate exceeds 10-3 for eight seconds, or for one second in V.22bis mode.

RI SIGNAL

Type:

Configuration

Format:

AT [cmds] \Rn [cmds]

Example:

AT \R0 Q0<CR>

Description:

Controls the behavior of the Ring Indicator signal.

Command

Function

\R0

RI signal high during rings, and forced high for duration of call.

» \R1

RI signal high during rings only.

SECURITY - AUTOCALLBACK DELAY

Type:

Register

Format:

AT [cmds] S78=n [cmds]

Example:

AT S78=10<CR>

Default:

30

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait to execute the autocallback sequence after an incoming call is detected.

SECURITY - CALLBACK DELAY

Type:

Register

Format:

AT [cmds] S74=n [cmds]

Example:

AT S74=30<CR>

Default:

15

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait to execute a callback sequence after the user has disconnected.

SECURITY - CALLBACK NUMBER

Type:

Configuration

Format:

AT [cmds] $Cn=<#> [cmds]

Example:

AT $L0=3 $C0=1(303)443-3388<CR>

Description:

Sets the callback number for user number n.

SECURITY - CALLBACK RETRY

Type:

Register

Format:

AT [cmds] S75=n [cmds]

Example:

AT S75=5<CR>

Default:

Unidentified

Range:

0-255

Unit:

1 redial

Description:

Sets how many times the modem will attempt to execute a callback if the first call fails.

SECURITY - CALLBACK RETRY DELAY

Type:

Register

Format:

AT [cmds] S76=n [cmds]

Example:

AT S76=60<CR>

Default:

15

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait to execute another callback sequence after one has failed.

SECURITY CHECK

Type:

Immediate

Format:

AT [cmds] $D? [cmds]

AT [cmds] $E? [cmds]

Example:

AT $DR $D?<CR>

Description:

Reports whether security is enabled.

SECURITY - DELETE USER

Type:

Configuration

Format:

AT [cmds] $Rn [cmds]

Example:

AT $R3<CR>

Description:

Deletes the user number n. User IDs 0 and 1 cannot be deleted.

SECURITY DISABLE

Type:

Immediate

Format:

AT [cmds] $D=xxxx

Example:

AT $D=MicroHouse<CR>

Description:

Disables security. A password must be specified.

SECURITY ENABLE - HIGH SECURITY

Type:

Immediate

Format:

AT [cmds] $EH=xxxx

Example:

AT $EH=SuperSecret<CR>

Description:

Enables security. The superuser password must be specified.

SECURITY ENABLE - LOW SECURITY

Type:

Immediate

Format:

AT [cmds] $E=xxxx

Example:

AT $E=MicroHouse<CR>

Description:

Enables security. A password must be specified.

SECURITY - FAILED LOGIN ATTEMPT COUNTERS

Type:

Configuration/Immediate

Format:

AT [cmds] $Mn [cmds]

Example:

AT $M $M*<CR>

Description:

Displays or clears the counters for failed login attempts. If a number is specified, the counter will be reset for that user. If an * follows, all counters will be cleared. If no character follows, the counters will be displayed.

SECURITY - FAILED LOGIN ATTEMPT MAXIMUM

Type:

Register

Format:

AT [cmds] S77=n [cmds]

Example:

AT S77=3<CR>

Default:

Unidentified

Range:

0-255

Unit:

1 attempt

Description:

Sets the maximum number of failed logins the modem will accept until it disconnects.

SECURITY - HIGH SECURITY PASSWORD

Type:

Configuration

Format:

AT [cmds] $Pn=xxxx$xxxx

Example:

AT $P0=SuperSecret$SuperSecret<CR>

Description:

Sets the password for user number n to xxxx. User number 0 is the superuser. The password must be between 4 and 34 characters inclusive. The $ character may not be used.

SECURITY - HIGH SECURITY RESET

Type:

Configuration

Format:

AT [cmds] $F=xxxx$xxxx

Example:

AT $F=SuperSecret$SuperSecret<CR>

Description:

Resets the high security options to their factory defaults.

SECURITY LEVEL

Type:

Configuration

Format:

AT [cmds] $Lm=n [cmds]

Example:

AT $L0=3 $C0=1(303)443-3388<CR>

Description:

Sets the security level for user number m.

Command

Function

$Lm=1

Modem prompts for a user ID and password on connection.

$Lm=2

Modem prompts for a user ID and password on connection, then modem begins callback sequence.

$Lm=3

Modem prompts for a user ID and password on connection, then modem begins callback sequence. When modem reconnects, it prompts for a user ID and password again.

SECURITY LOGIN

Type:

Immediate

Format:

AT [cmds] $n=xxxx [cmds]

Example:

AT $1=MicroHouse<CR>

Description:

Logs into modem, from the local machine or remotely.

SECURITY LOGOUT

Type:

Immediate

Format:

AT [cmds] $$ [cmds]

Example:

AT $$<CR>

Description:

Logs out from the modem.

SECURITY - LOW SECURITY PASSWORD

Type:

Configuration

Format:

AT [cmds] $S=xxxx

Example:

AT $S=MicroHouse<CR>

Description:

Sets an empty login password to xxxx.

SECURITY - LOW SECURITY PASSWORD CHANGE

Type:

Configuration

Format:

AT [cmds] $C=xxxx,yyyy

Example:

AT $CMicroHouse=Fubar<CR>

Description:

Changes the password xxxx to yyyy. If a - is given for yyyy, the password will be deleted.

SECURITY - LOW SECURITY RESET

Type:

Configuration

Format:

AT [cmds] $DR [cmds]

Example:

AT $DR $D?<CR>

Description:

Resets the low security options to their factory defaults.

SECURITY OPTIONS

Type:

Configuration

Format:

AT [cmds] $Wm=n [cmds]

Example:

AT $W0=3 $C0=1(303)443-3388<CR>

Description:

Controls what features a remote user has access to.

Command

Function

$W0

Remote users can access no extra features.

$W1

Remote users can change their passwords and callback numbers.

$W2

Remote users can change their passwords and callback numbers and login as the superuser.

SECURITY - PASSWORD TIME

Type:

Register

Format:

AT [cmds] S73=n [cmds]

Example:

AT S73=10<CR>

Default:

Unidentified

Range:

0-255

Unit:

1 second

Description:

Configures how long the modem will wait for a password when in secure mode.

SECURITY - REPORT SUPERUSER STATUS

Type:

Immediate

Format:

AT [cmds] $Sn? [cmds]

Example:

AT $S3?<CR>

Description:

Reports whether user n has superuser status.

SECURITY - REPORT USER SETTINGS

Type:

Immediate

Format:

AT [cmds] $In [cmds]

Example:

AT $I3<CR>

Description:

Reports security level and callback number for user n.

SECURITY - REPORT USERS SETTINGS

Type:

Immediate

Format:

AT [cmds] $IBn [cmds]

Example:

AT $IB11<CR>

Description:

Reports security level and callback number for the ten users beginning at user number n.

SECURITY - SUPERUSER MODE

Type:

Immediate

Format:

AT [cmds] $S=xxxx [cmds]

Example:

AT $S=SuperSecret<CR>

Description:

Attempts to enter superuser mode.

STATUS REGISTER BIT

Type:

Configuration

Format:

Write: AT [cmds] Sn.m=0 or 1 [cmds]

Read: AT [cmds] Sn.m=? [cmds]

Example:

AT S40.4=1 S51.3?<CR>

Description:

Sets/clears or reads bit m of register n.

STATUS REGISTER HEXADECIMAL

Type:

Configuration

Format:

Write: AT [cmds] Sn^=hh [cmds]

Read: AT [cmds] Sn?^ [cmds]

Example:

AT S99^=3F S99?^<CR>

Description:

Sets register n to hexadecimal number hh or displays register n in hexadecimal.

STORE PHONE NUMBER IN NVRAM

Type:

Configuration

Format:

AT [cmds] *CNn,<#>

Example:

AT *AU4 *CN4,1(303)443-3388<CR>

Description:

Stores a phone number in the modem’s memory.

SWITCHED LINE TRANSMISSION LEVEL

Type:

Configuration

Format:

AT [cmds] %Zn [cmds]

Example:

AT %R1 %Z1<CR>

Description:

Sets the signal level for transmission.

Command

Function

» %Z0

Permissive transmission level (level fixed at -9dBm.)

%Z1

Programmable transmission level (level controlled by exterior resistor, or -12dBm if absent.)

SWITCHED LINE TRANSMISSION LEVEL

Type:

Configuration

Format:

AT [cmds] *TDn [cmds]

Example:

AT *TD15<CR>

Default:

9

Range:

9 - 30

Unit:

-1 dBm

Description:

Sets the signal level for transmission when in switched line mode.

TALK/DATA MODE

Type:

Immediate

Format:

AT [cmds] *DAn [cmds]

Example:

AT *DA1 <CR>

Description:

Selects talk or data mode.

Command

Function

» *DA0

Talk mode enabled.

*DA1

Data mode enabled.

TEST MODE - BIDIRECTIONAL ANALOG LOOPBACK TEST

Type:

Configuration

Format:

AT [cmds] *ANn [cmds]

Example:

AT *AN1<CR>

Description:

Controls the bidirectional local analog loopback test mode.

Command

Function

» *AN0

End loopback test.

*AN1

Begin loopback test.

TEST MODE - BIDIRECTIONAL DIGITAL LOOPBACK TEST

Type:

Configuration

Format:

AT [cmds] *DGn [cmds]

Example:

AT *DG1<CR>

Description:

Controls the bidirectional local digital loopback test mode.

Command

Function

» *DG0

End loopback test.

*DG1

Begin loopback test.

TEST MODES

Format

AT [cmds] S34=n [cmds]

Example:

ATS34=4<CR>

Default:

0

Range:

0 - 15

Unit:

Bit-mapped

Description:

Initiates and controls loopback tests.

Bit

Value

Function

0

» 0

1

End bidirectional local analog loopback test.

Begin bidirectional local analog loopback test.

1

» 0

1

End bidirectional local digital loopback test.

Begin bidirectional local digital loopback test.

2

» 0

1

Pin 18 has no function.

Pin 18 going high causes the modem to perform local analog loopback test.

3

» 0

1

Pin 21 has no function.

Pin 21 going high causes the modem to perform remote digital loopback test.

TEST STATUS

Format

AT [cmds] S16=n [cmds]

Example:

ATS16=32<CR>

Default:

Read-only

Range:

0 - 255

Unit:

Bit-mapped

Description:

Contains status of loopback tests.

Bit

Value

Function

0

0

1

Local analog loopback test not in progress.

Local analog loopback test in progress.

1

0

1

Remote analog loopback test not in progress.

Remote analog loopback test in progress.

2

0

1

Local digital loopback test not in progress.

Local digital loopback test in progress.

3

0

1

Remotely requested remote digital loopback test not in progress.

Remotely requested remote digital loopback test in progress.

4

0

1

Locally requested remote digital loopback test not in progress.

Locally requested remote digital loopback test in progress.

5

0

1

Remote digital loopback with local self-test not in progress.

Remote digital loopback with local self-test in progress.

6

0

1

Local analog loopback with local self-test not in progress.

Local analog loopback with local self-test in progress.

7

0

1

Remote analog loopback with local self-test not in progress.

Remote analog loopback with local self-test in progress.

V.25bis OPTIONS

Format

AT [cmds] S30=n [cmds]

Example:

ATS30=4<CR>

Default:

0

Range:

0 - 230

Unit:

Bit-mapped

Description:

Controls V.25bis character set, VAL response, NRZ/NRZI, and communications mode.

Bit

Value

Function

0

0

Not used.

1

» 0

1

Use ASCII character set.

Use EBCDIC character set.

2

» 0

1

VAL response enabled.

VAL response disabled.

3

0

Not used.

4

0

Not used.

5

» 0

1

Use NRZ mode.

Use NRZI mode.

7, 6

» 00

01

10

11

V.25bis command set disabled.

V.25bis bisynchronous command, synchronous connect mode.

V.25bis SDLC command, synchronous connect mode.

V.25bis asynchronous command, synchronous connect mode.

V.32 HANDSHAKE OPTIONS

Type:

Configuration

Format:

AT [cmds] *FTn [cmds]

Example:

AT *FT0<CR>

Description:

Shortens V.32 and V.32bis handshake time.

Command

Function

» *FT0

Normal handshake sequence.

*FT1

Training time is shortened by 2 seconds in V.32 and V.32bis modes.

V.34 OPTIONS

Format:

AT [cmds] S95=n [cmds]

Example:

ATS95=240<CR>

Default:

240

Range:

0 - 240

Unit:

Bit-mapped

Description:

Controls non-linear coding, pre-emphasis, shaping, and pre-coding.

Bit

Value

Function

3 - 1

0

Not used.

4

0

» 1

Non-linear coding disabled.

Non-linear coding enabled.

5

0

» 1

Pre-emphasis disabled.

Pre-emphasis enabled.

6

0

» 1

Constellation shaping disabled.

Constellation shaping enabled.

7

0

» 1

Pre-coding disabled.

Pre-coding enabled.

V.34 OPTIONS

Format:

AT [cmds] S96=n [cmds]

Example:

ATS96=160<CR>

Default:

160

Range:

0 - 160

Unit:

Bit-mapped

Description:

Controls TX level deviation and asymmetric bit rates.

Bit

Value

Function

4 - 0

0

Not used.

5

0

» 1

Asymmetric bit rates disabled.

Asymmetric bit rates enabled.

6

0

Not used.

7

0

» 1

TX level deviation disabled.

TX level deviation enabled.

V.34 RETRAIN SENSITIVITY

Type:

Configuration

Format:

AT [cmds] *THn [cmds]

Example:

AT *MM12 *TH1<CR>

Description:

Sets how poor line conditions must be before the modem will initiate a retrain when in V.34 mode.

Command

Function

» *TH0

Modem will initiate retrain when the Bit Error Rate exceeds 10-6.

*TH1

Modem will initiate retrain when the Bit Error Rate exceeds 10-4.

*TH2

Modem will initiate retrain when the Bit Error Rate exceeds 10-2.

V.34 SPLIT BAUD MODE

Type:

Configuration

Format:

AT [cmds] *ASn [cmds]

Example:

AT *AS1 <CR>

Description:

Controls V.34 split baud mode.

Command

Function

*AS0

V.34 split baud mode disabled.

*AS1

V.34 split baud mode enabled.

V.42 NEGOTIATION MODE

Type:

Configuration

Format:

AT [cmds] \Mn [cmds]

Example:

AT \M0 H1 DT555-1212<CR>

Description:

Selects how the modem negotiates V.42 modulation during handshaking.

Command

Function

\M0

Normal handshaking enabled.

» \M1

Fast handshaking enabled.

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.

Proprietary V.25bis Command Set

CONNECTION

Type:

Response

Format:

CNX@nnnnnBPS

Description:

A connection has been successfully established at the rate specified.

DISPLAY CURRENT COMMAND STATUS

Type:

Immediate

Format:

RLOnnn;xx

Example:

RLO112;2<CR>

Description:

Displays current setting of modem commands. If no parameters are given, all commands will be displayed. Otherwise, xx addresses will be displayed beginning at nnn.

DISPLAY LINKED NUMBERS

Type:

Immediate

Format:

RLL

Example:

RLL<CR>

Description:

Requests the modem to return the list of linked stored numbers.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

RLN

Example:

RLN<CR>

Description:

Requests the modem to return the list of stored numbers.

INVALID

Type:

Response

Format:

INVxx

Example:

INVCU

Description:

The modem was issued an improper command. The two letters following indicate the error.

Code

Meaning

INVCU

An error occurred in transmission.

INVMS

The command was too long or was followed by a semicolon.

INVPS

An improper number parameters were issued.

INVPV

The parameters were ignored or invalid.

LINK STORED NUMBERS

Type:

Configuration

Format:

PRLm;n

Example:

PRL1;2<CR>

Description:

Links memory location m to memory location n. If a call to location m fails, the number at n will be dialed.

REDIAL

Type:

Immediate

Format:

CRRn

Example:

CRR4<CR>

Description:

Redials the last number dialed up to n times.

REPORT PRODUCT VERSION

Type:

Immediate

Format:

RLV

Example:

RLV<CR>

Description:

Reports product version.

RESET MODEM TO STORED PROFILE

Type:

Immediate

Format:

PRPn

Example:

PRP3<CR>

Description:

Resets modem to stored profile n.

SET OPTIONS

Type:

Configuration

Format:

PROnnn;aa;bb;cc...

Example:

PRO112;02;01<CR>

Description:

Sets various options. The first number is the first address to set. Following parameters set the addresses, starting with nnn and progressing. In this example, address 112 would be set to 02 and address 113 would be set to 01.

STORE ACTIVE PROFILE

Type:

Immediate

Format:

PRK

Example:

PRK<CR>

Description:

Writes the values for the current profile into the non-volatile RAM.