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V.34R

MOTOROLA, INC.

V.34R

Card Type

Modem (synchronous/asynchronous)

Chip Set

Motorola

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

Serial

Fax Class

Class I

Data Modulation Protocol

Bell 103A, 212A

ITU-T V.17, V.21, V.22, V.22bis, V.27bis, V.29, 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

Function

Label

Function

Label

AC power in

CN1

Line in

CN4

Serial port

CN2

Power switch

SW1

Line out

CN3

Talk/Data button

SW2

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

CD

Red

On

Carrier signal detected or error correction negotiation completed

CD

Red

Off

Carrier signal not detected

TD

Red

On

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

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

Note: The function of the TALK LED is unidentified.

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, D, E, L, M, O, Q, V, W, X, Y, Z

&D, &F, &G, &P, &V, &W, &X, &Y

Extended AT Commands

\V

%E

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S22, S23, S25, S26

V.25bis Commands

The V.25bis command set is unidentified.

Note: See MHI documentation for complete information.

Proprietary AT Command Set

AUTO-ANSWER OVERRIDE

Type:

Immediate

Format:

AT [cmds] *IC [cmds]

Description:

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

AUTO-DIAL STORED NUMBER

Type:

Configuration

Format:

AT [cmds] *AUn [cmds]

Description:

Sets the auto-dialing function to dial the number stored in memory location n.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Register

Format:

AT [cmds] S64=n [cmds]

Default:

13

Range:

0-127

Unit:

ASCII

Description:

Sets the character used as the auto-reliable fallback character. S64=0 will disable this function.

BIT-MAPPED REGISTER S21

Format

AT [cmds] S21=n [cmds]

Default:

132

Range:

0 - 255

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

í 00

01

10

11

DSR forced high.

DSR normal, except forced low on disconnect.

DSR normal.

DSR follows OH.

5, 1

í 00

01

10

11

CD forced high.

CD forced high except during disconnect.

CD normal.

CD follows remote RTS signal.

2

0

í 1

CTS normal.

CTS forced high.

4, 3

í 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

í 1

Long Space Disconnect function disabled.

Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S27

Format

AT [cmds] S27=n [cmds]

Default:

9

Range:

0 - 127

Description:

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

Bit

Value

Function

1, 0

00

01

í 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

í 0

1

Switched line.

Leased line.

3

0

Not used.

5, 4

í 00

01

10

Internal DTE transmit clock source.

External DTE transmit clock source.

Slave DTE transmit clock source.

6

í 0

1

DTR dialing enabled.

DTR dialing disabled.

BIT-MAPPED REGISTER S29

Format

AT [cmds] S29=n [cmds]

Default:

0

Range:

0 - 135

Description:

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

Bit

Value

Function

0

í 0

1

AT command set enabled.

AT command set disabled.

1

í 0

1

Modem will not reset on disconnect.

Modem will reset on disconnect.

2

í 0

1

Normal V.32 handshake sequence.

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

6 - 3

0000

Not used.

7

í 0

1

DTR dialing enabled.

DTR dialing disabled.

BIT-MAPPED REGISTER S57

Format:

AT [cmds] S57=n [cmds]

Default:

0

Range:

0 - 33

Description:

Controls result code format and busy out.

Bit

Value

Function

0

í 0

1

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

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

4 - 1

0000

Not used.

5

í 0

1

Busy out during local analog loopback test disabled.

Busy out during local analog loopback test enabled.

BIT-MAPPED REGISTER S60

Format

AT [cmds] S60=n [cmds]

Default:

67

Range:

0 - 199

Description:

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

Bit

Value

Function

0

0

í 1

Auto-retrain disabled.

Auto-retrain enabled.

1

0

í 1

MNP disabled.

MNP enabled.

2

í 0

1

Data is discarded during auto-reliable time.

Data is buffered during auto-reliable time.

5 - 3

000

Not used.

6

0

í 1

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

RI signal high during rings only.

7

í 0

1

Extended result codes disabled.

Extended result codes enabled.

BIT-MAPPED REGISTER S70

Format

AT [cmds] S70=n [cmds]

Default:

15

Range:

0 - 15

Description:

Controls connect mode and V.42 negotiation mode.

Bit

Value

Function

2, 1, 0

000

001

010

011

100

101

110

í 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

í 1

Normal V.42 handshaking enabled.

Fast V.42 handshaking enabled.

BIT-MAPPED REGISTER S72

Format

AT [cmds] S72=n [cmds]

Default:

0

Range:

0 - 137

Description:

Controls serial port lock, CTS signal, and auto-callback function.

Bit

Value

Function

0

í 0

1

Serial speed locked.

Serial speed follows connect speed.

2, 1

00

Not used.

3

í 0

1

CTS normal.

CTS follows CD.

6 - 4

000

Not used.

7

í 0

1

Auto-callback disabled.

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

BREAK LENGTH

Type:

Register

Format:

AT [cmds] S79=n [cmds]

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]

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.

í \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]

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.

í 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.

CHARACTER LENGTH AND PARITY

Format

AT [cmds] S61? [cmds]

Default:

Read-only

Range:

0 - 56

Description:

Reports current character length and parity.

Bit

Value

Meaning

2 - 0

000

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]

Description:

Disables the AT command set.

Note:

To re-enable the command set, cycle power on the modem or hold the Talk/Data switch in for at least five seconds.

Command

Function

*NT0

Command set disabled.

í *NT1

Command set enabled.

COMMUNICATIONS MODE

Type:

Configuration

Format:

AT [cmds] &Mn [cmds]

Description:

Selects the active communications mode.

Command

Function

&M0

Asynchronous command and data modes.

&M1

Asynchronous command and synchronous connect mode.

&M2

DTR dialing enabled and synchronous connect mode.

&M3

Manual dialing only and synchronous connect mode.

&M4

V.25bis BISYNC command and synchronous connect mode.

&M5

V.25bis SDLC command and synchronous connect mode.

&M6

V.25bis asynchronous command and synchronous connect mode.

COMPRESSION

Type:

Register

Format:

AT S56=n

Description:

Selects data compression.

Command

Function

S56=0

Data compression disabled.

S56=1

Data compression enabled on transmit only.

Í S56=2

Data compression enabled on receive only.

í S56=3

Data compression enabled.

COMPRESSION AND ERROR CORRECTION - CURRENT

Type:

Register

Format:

AT [cmds] S71? [cmds]

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.

CONNECTION SPEED - CURRENT

Type:

Register

Format:

AT [cmds] S67? [cmds]

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]

Description:

Sets slowest allowed connection speed.

Command

Function

%L0

No minimum speed.

í %L1

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:

Register

Format:

AT [cmds] S81=n [cmds]

Description:

Sets slowest allowed connection speed.

Command

Function

S81=0

No minimum speed.

í S81=1

No minimum speed.

S81=2

Select 1200bps minimum speed.

S81=3

Select 2400bps minimum speed.

S81=4

Select 4800bps minimum speed.

S81=5

Select 9600bps uncoded minimum speed.

S81=6

Select 9600bps minimum speed.

S81=7

Select 7200bps minimum speed.

S81=8

Select 12Kbps minimum speed.

S81=9

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]

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.

í %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]

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.

í 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]

Description:

Selects the function of the CTS signal.

Command

Function

&R0

RTS to CTS delay enabled.

í &R1

CTS forced high.

&R2

CTS follows CD.

&R9

CTS follows RTS.

DCD SIGNAL

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Description:

Configures the behavior of the DCD signal.

Command

Function

í &C0

DCD forced high.

&C1

DCD normal.

&C2

DCD forced high except during handshaking and disconnecting.

&C3

DCD follows remote RTS signal.

DISCONNECT BUFFER DELAY

Type:

Register

Format:

AT [cmds] S62=n [cmds]

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]

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.

í *LC2

Disconnect after 90ms if current is lost.

DISCONNECT ON LOSS OF CURRENT

Type:

Register

Format:

AT [cmds] S32=n [cmds]

Description:

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

Command

Function

S32=0

Do not disconnect on loss of current.

í S32=2

Disconnect after 90ms if current is lost.

S32=4

Disconnect after 8ms if current is lost.

DISCONNECT RESET

Type:

Configuration

Format:

AT [cmds] *ROn [cmds]

Description:

Selects whether the modem will reset on disconnect.

Command

Function

í *RO0

Modem will not reset on disconnect.

*RO1

Modem will reset on disconnect.

DISPLAY INFORMATION

Type:

Immediate

Format:

AT [cmds] In [cmds]

Description:

Displays modem properties.

Command

Function

I0

Displays product code.

I1

Displays checksum number.

I3

Displays firmware version.

I4

Displays feature code.

I5

Displays reason for last disconnect.

DISPLAY PRODUCT VERSION

Type:

Immediate

Format:

AT [cmds] %V [cmds]

Description:

Displays product version.

DISPLAY SERIAL NUMBER

Type:

Immediate

Format:

AT [cmds] $V [cmds]

Description:

Displays product serial number.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

AT [cmds] *ND [cmds]

Description:

Displays all stored phone numbers.

DSR SIGNAL

Type:

Configuration

Format:

AT [cmds] &Sn [cmds]

Description:

Controls the behaviour of the DSR signal.

Command

Function

í &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] S82=n [cmds]

Description:

Selects extended result codes.

Command

Function

í 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.

FLOW CONTROL CHARACTER - XOFF FROM TERMINAL

Type:

Register

Format:

AT [cmds] S45=n [cmds]

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character the terminal sends to represent XOFF.

FLOW CONTROL CHARACTER - XOFF TO TERMINAL

Type:

Register

Format:

AT [cmds] S50=n [cmds]

Default:

19

Range:

0-127

Unit:

ASCII

Description:

Sets the character the modem sends to represent XOFF.

FLOW CONTROL CHARACTER - XON FROM TERMINAL

Type:

Register

Format:

AT [cmds] S44=n [cmds]

Default:

17

Range:

0-127

Unit:

ASCII

Description:

Sets the character the terminal sends to represent XON.

FLOW CONTROL CHARACTER - XON TO TERMINAL

Type:

Register

Format:

AT [cmds] S49=n [cmds]

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]

Default:

33

Range:

0 - 123

Description:

Controls flow control type and pass-through.

Bit

Value

Function

1, 0

00

í 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

í 0

1

Flow control disabled.

Flow control enabled.

4

í 0

1

XON/XOFF signals trapped by local modem.

XON/XOFF passed through local modem.

6, 5

00

í 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.

FORCE RETRAIN

Type:

Immediate

Format:

AT [cmds] *RRn [cmds]

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:

Immdeiate/Configuration

Format:

AT [cmds] Hn [cmds]

Description:

Commands the modem to go on- or off-hook, and selects how the modem will hang up.

Command

Function

H0

Modem commanded to go on-hook (hang up).

H1

Modem commanded to go off-hook (pick up).

H2

Set hang up mode to normal on next ATH0 command

H3

Set hang up mode to fast on next ATH0 command

HELP SCREENS

Type:

Immediate

Format:

AT $H=xxxx

Description:

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

INACTIVITY TIMER

Type:

Register

Format:

AT [cmds] S58=n [cmds]

Default:

0

Range:

0-255

Unit:

1 minute

Description:

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

LEASED LINE BACKUP RECOVERY DELAY

Type:

Register

Format:

AT [cmds] S28=n [cmds]

Default:

15

Range:

0-255

Unit:

1 minute

Description:

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

LEASED LINE BACKUP NUMBER

Type:

Register

Format:

AT [cmds] S35=n [cmds]

Description:

Sets the stored number the modem will dial for DTR dialing and leased-line backup.

LOCAL SERIAL PORT SPEED - CURRENT

Type:

Configuration

Format:

AT [cmds] S80=n [cmds]

Description:

Reports the current serial port speed.

Í 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.

LOCAL SERIAL PORT SPEED CHANGE ON PIN 23

Type:

Configuration

Format:

AT [cmds] *FBn [cmds]

Description:

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

Command

Function

í *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.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Register

Format:

AT [cmds] S63=n [cmds]

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.

í S63=3

MNP block size is 256 characters.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] *MMn [cmds]

Description:

Selects the protocol to use on the next connection.

Command

Function

í *MM0

Auto-detect fastest common protocol.

*MM1

Selects V.21.

*MM2

Selects Bell 103.

*MM5

Selects V.22bis.

*MM11

Selects V.32bis.

*MM12

Selects V.34.

PROTOCOL/SPEED

Type:

Configuration

Format:

AT [cmds] S88=n [cmds]

Description:

Selects the protocol to use on the next connection.

Command

Function

í S88=0

Auto-detect fastest common protocol.

S88=1

Selects V.21.

S88=2

Selects Bell 103.

S88=5

Selects V.22bis.

S88=11

Selects V.32bis.

S88=12

Selects V.34.

PROTOCOL/SPEED - CURRENT

Type:

Configuration

Format:

AT [cmds] S91? [cmds]

Description:

Returns a value indicating the current protocol.

Value

Meaning

0

Auto-detect fastest common protocol.

1

Selects V.21.

2

Selects Bell 103.

5

Selects V.22bis.

11

Selects V.32bis.

12

Selects V.34.

REMOTE CONFIGURATION

Type:

Configuration

Format:

AT [cmds] %T=n [cmds]

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

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]

Default:

N/A

Range:

0-99999999, D, <none>

Description:

Sets the security code that a remote modem must send to begin a remote configuration sessions. If nnnn is omitted, the code will be cleared; if a D is given, remote configuration is disabled.

RESULT CODE MODE

Type:

Configuration

Format:

AT [cmds] *RCn [cmds]

Description:

Selects normal or Motorola result code numbering.

Command

Function

í *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).

RETRAIN SENSITIVITY

Type:

Configuration

Format:

AT [cmds] %Rn [cmds]

Description:

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

Command

Function

í %R0

Modem will not initiate retrain.

%R1

Modem will initiate retrain when the Bit Error Rate exceeds 10-5.

%R2

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

%R3

Modem will initiate retrain when the Bit Error Rate exceeds 10-3.

RETRAIN SENSITIVITY

Type:

Register

Format:

AT [cmds] S53=n [cmds]

Description:

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

Command

Function

í S53=0

Modem will not initiate retrain.

S53=4

Modem will initiate retrain when the Bit Error Rate exceeds 10-5.

S53=8

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

S53=12

Modem will initiate retrain when the Bit Error Rate exceeds 10-3.

RI SIGNAL

Type:

Configuration

Format:

AT [cmds] \Rn [cmds]

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 - AUTO-CALLBACK DELAY

Type:

Register

Format:

AT [cmds] S78=n [cmds]

Default:

30

Range:

0-255

Unit:

1 second

Description:

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

SECURITY - CALLBACK DELAY

Type:

Register

Format:

AT [cmds] S74=n [cmds]

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 RETRY

Type:

Register

Format:

AT [cmds] S75=n [cmds]

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]

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 - FAILED LOGIN ATTEMPT MAXIMUM

Type:

Register

Format:

AT [cmds] S77=n [cmds]

Default:

Unidentified

Range:

0-255

Unit:

1 attempt

Description:

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

SECURITY - PASSWORD TIME

Type:

Register

Format:

AT [cmds] S73=n [cmds]

Default:

Unidentified

Range:

0-255

Unit:

1 second

Description:

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

STATUS REGISTER BIT

Type:

Configuration

Format:

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

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

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]

Description:

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

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] &Z<#>

Description:

Writes the indicated telephone number into non-volatile memory location 1.

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] *CNn,<#>

Description:

Writes the indicated telephone number into non-volatile memory at location n.

TALK/DATA MODE

Type:

Immediate

Format:

AT [cmds] *DAn [cmds]

Description:

Selects talk or data mode.

Command

Function

í *DA0

Talk mode enabled.

*DA1

Data mode enabled.

TEST MODES

Format

AT [cmds] S34=n [cmds]

Default:

0

Range:

0 - 15

Description:

Initiates and controls loopback test options.

Bit

Value

Function

0

í 0

1

End bidirectional local analog loopback test.

Begin bidirectional local analog loopback test.

1

í 0

1

End bidirectional local digital loopback test.

Begin bidirectional local digital loopback test.

2

í 0

1

Pin 18 has no function.

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

3

í 0

1

Pin 21 has no function.

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

TRANSMISSION LEVEL - LEASED LINE

Type:

Configuration

Format:

AT [cmds] %Zn [cmds]

Description:

Sets the signal level for transmission over leased lines.

Command

Function

í %Z0

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

%Z1

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

TRANSMISSION LEVEL - SWITCHED LINE

Type:

Configuration

Format:

AT [cmds] *TDn [cmds]

Default:

9

Range:

9-30

Unit:

-1 dBm

Description:

Sets the transmitted signal level when the modem is connected to a switched phone line.

V.25bis OPTIONS

Format

AT [cmds] S30=n [cmds]

Default:

0

Range:

0 - 230

Description:

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

Bit

Value

Function

0

0

Not used.

1

í 0

1

Use ASCII character set.

Use EBCDIC character set.

2

í 0

1

VAL response enabled.

VAL response disabled.

4, 3

00

Not used.

5

í 0

1

Use NRZ mode.

Use NRZI mode.

7, 6

í 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]

Description:

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

Command

Function

í *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]

Default:

241

Range:

0 - 241

Description:

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

Bit

Value

Function

0

0

í 1

V.8 answer disabled for modulations below V.34.

V.8 answer enabled for modulations below V.34.

3 - 1

000

Not used.

4

0

í 1

Non-linear coding disabled.

Non-linear coding enabled.

5

0

í 1

Pre-emphasis disabled.

Pre-emphasis enabled.

6

0

í 1

Constellation shaping disabled.

Constellation shaping enabled.

7

0

í 1

Pre-coding disabled.

Pre-coding enabled.

V.34 OPTIONS

Format:

AT [cmds] S96=n [cmds]

Default:

160

Range:

0 - 160

Description:

Controls TX level deviation and asymmetric bit rates.

Bit

Value

Function

4 - 0

00000

Not used.

5

0

í 1

Asymmetric bit rates disabled.

Asymmetric bit rates enabled.

6

0

Not used.

7

0

í 1

TX level deviation disabled.

TX level deviation enabled.

V.34 RETRAIN SENSITIVITY

Type:

Configuration

Format:

AT [cmds] *THn [cmds]

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.

í *TH2

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

V.34 SPLIT-SPEED

Type:

Configuration

Format:

AT [cmds] *ASn [cmds]

Description:

Controls V.34 - split-speed mode.

Command

Function

*AS0

V.34 split-speed disabled.

*AS1

V.34 split-speed enabled.