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AX/2400

MICROCOM, INC.

AX/2400

Card Type

Modem (synchronous/asynchronous)

Chipset

Microcom, Inc.

Maximum Onboard Memory

8K battery-backup DRAM

Maximum Data Rate

2400bps

Data Bus

Serial

Data Modulation

Bell 103A/212A

ITU-T V.22, V.22bis

Error Correction/Compression

MNP4

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Volume

R1

Line in

CN2

Talk/data switch

SW3

DC power

CN3

Synchronous/asynchronous switch

SW4

RS-232/422

CN4

Reset switch

SW5

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í Busy out disabled

JP1

Pins 3 & 4 closed

Busy out enabled

JP1

Pins 1 & 2 closed

í Receiver sensitivity set to -10 to -43 dBm

JP2

Pins 3 & 4 closed

Receiver sensitivity set to 0 to -33 dBm

JP2

Pins 1 & 2 closed

í Pin 12 of RS-232 port indicates 1200bps connection

JP3/A

Closed

Pin 12 of RS-232 port does not indicate 1200bps connection

JP3/A

Open

í Synchronous transmit clock on RS-232 pin 15 enabled

JP3/B

Closed

Synchronous transmit clock on RS-232 pin 15 disabled

JP3/B

Open

USER CONFIGURABLE SETTINGS (CON’T)

Setting

Label

Position

í Pin 15 of RS-232 port does not indicate 1200bps connection

JP3/C

Open

Pin 15 of RS-232 port indicates 1200bps connection

JP3/C

Closed

í RTS signal in on RS-232 pin 15 disabled

JP3/D

Open

RTS signal in on RS-232 pin 15 enabled

JP3/D

Closed

í Pin 23 of RS-232 port indicates 2400bps connection

JP4

Closed

Pin 23 of RS-232 port does not indicate 2400bps connection

JP4

Open

í DTR normal

SW1/1

On

DTR forced high

SW1/1

Off

í Microcom SX command set enabled (asynchronous mode only)

SW1/2

On

AT command set enabled (asynchronous mode only)

SW1/2

Off

í Result codes disabled (asynchronous mode only)

SW1/3

On

Result codes enabled (asynchronous mode only)

SW1/3

Off

í Command echo disabled (asynchronous mode only)

SW1/4

Off

Command echo enabled (asynchronous mode only)

SW1/4

On

í Auto-answer enabled (asynchronous mode only)

SW1/5

On

Auto-answer disabled (asynchronous mode only)

SW1/5

Off

í CD normal (asynchronous mode only)

SW1/6

On

CD forced high (asynchronous mode only)

SW1/6

Off

í Verbose result codes enabled (asynchronous mode only)

SW1/7

On

Numeric result codes enabled (asynchronous mode only)

SW1/7

Off

í Command sets disabled (asynchronous mode only)

SW1/8

On

Command sets enabled (asynchronous mode only)

SW1/8

Off

í MNP result codes disabled (asynchronous mode only)

SW2/5

On

MNP result codes enabled (asynchronous mode only)

SW2/5

Off

í Factory defaults not restored on reset (asynchronous AT command set only)

SW2/6

On

Factory defaults restored on reset (asynchronous AT command set only)

SW2/6

Off

í Switched line type (synchronous mode only)

SW2/6

On

Leased line type (synchronous mode only)

SW2/6

Off

í Configuration not set to switch settings on reset (asynchronous mode only)

SW2/7

On

Configuration set to switch settings on reset (asynchronous mode only)

SW2/7

Off

í Auto-answer disabled (synchronous mode only)

SW2/7

On

Auto-answer enabled (synchronous mode only)

SW2/7

Off

í Line speed set to 2400bps (synchronous mode only)

SW2/8

On

Line speed set to 1200bps (synchronous mode only)

SW2/8

Off

AUTO-DIAL NUMBER (SYNCHRONOUS MODE ONLY)

Setting

SW1/4

SW1/5

SW1/6

SW1/7

First number

Off

On

On

On

Second number

On

Off

On

On

Third number

On

On

Off

On

Fourth number

On

On

On

Off

Disabled

On

On

On

On

FLOW CONTROL (ASYNCHRONOUS MODE ONLY)

Modem to DTE

Modem to Modem

SW2/1

SW2/2

Disabled

Disabled

On

On

XON/XOFF

XON/XOFF

On

Off

RTS/CTS

XON/XOFF

Off

On

Disabled

Disabled

Off

Off

CONNECT MODE (ASYNCHRONOUS MODE ONLY)

Setting

SW2/3

SW2/4

Normal mode

On

On

Direct mode

Off

Off

Reliable mode

On

Off

Auto-reliable mode

Off

On

CD, DSR, AND CTS SIGNALS (SYNCHRONOUS MODE ONLY)

CD Signal

DSR Signal

CTS Signal

SW2/4

SW2/5

Forced high

Forced high

Forced high

On

On

Normal

Follows OH

Normal

On

Off

High except at disconnect

High except at disconnect

High except at disconnect

Off

On

Normal

Forced high

Forced high

Off

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Unidentified

On

Power is on

PWR

Unidentified

Off

Power is off

TST

Unidentified

On

System error has occurred or modem is retraining

TST

Unidentified

Blinking

Serial port is waiting to be configured

TST

Unidentified

One blink

Data error has occurred

TST

Unidentified

Off

Normal operation

OH

Unidentified

On

Modem is off-hook

OH

Unidentified

Off

Modem is on-hook

HS

Green

On

Modem is operating at 2400bps

HS

Red

On

Modem is operating at 1200bps

HS

N/A

Off

Modem is operating at 300bps

DTR

Unidentified

On

DTR signal is high

DTR

Unidentified

Off

DTR signal is low

TX

Unidentified

Blinking

Modem is transmitting data

TX

Unidentified

Off

Modem is not transmitting data

RX

Unidentified

Blinking

Modem is receiving data

RX

Unidentified

Off

Modem is not receiving data

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, H, I, M, O, P, Q, T, V, X, Z

&D, &F, &G, &L, &M, &P, &R, &T, &W, &Z

Extended AT Commands

\A, \B, \C, \E, \G, \J, \L, \N, \O, \Q, \T, \U, \V, \X, \Y, \Z

%A, %E

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S14, S16, S18, S21, S22, S23, S25, S26, S27

Note: See MHI Help File for complete command documentation.

Proprietary AT Command Set

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.

\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.

COMMAND SET - MICROCOM SX

Type:

Immediate

Format:

AT [cmds] \M

Description:

Switches to the proprietary Microcom SX command set. The modem will prompt the user to confirm this action.

DATA CARRIER DETECT (DCD) SIGNAL

Type:

Configuration

Format:

AT [cmds] &Cn [cmds]

Description:

Controls the behaviour of the DCD signal.

Command

Function

í &C0

DCD forced high.

&C1

DCD forced high after carrier signal is detected.

&C2

CD forced high except during disconnect.

DATA SET READY (DSR) AND CLEAR TO SEND (CTS) SIGNALS

Type:

Configuration

Format:

AT [cmds] \Dn [cmds]

Description:

Controls the behaviour of the DSR and CTS signals.

Command

Function

í \D0

DSR and CTS forced high.

\D1

CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH.

\D2

DSR and CTS follow CD.

\D3

DSR follows answer tone, CTS forced high.

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

DL

Re-dial last number.

DNn

If the dial attempt fails, the modem will attempt to dial stored number n.

DP

Pulse dialing enabled.

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DS

Dial the first stored number.

DT

Tone dialing enabled.

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 time specified in S7 before returning on-hook.

D@

Wait for Quiet 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/n

Dial stored telephone number n.

D;

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

DISPLAY CONFIGURATION - CONNECTION

Type:

Immediate

Format:

AT [cmds] \S [cmds]

Description:

Displays settings pertaining to the current connection.

DISPLAY S-REGISTERS

Type:

Immediate

Format:

AT [cmds] %R [cmds]

Description:

Displays the settings of all S-registers.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

AT [cmds] \F [cmds]

Description:

Displays all stored phone numbers.

INTERFACE PROTOCOL

Type:

Configuration

Format:

AT [cmds] \In [cmds]

Description:

Selects whether the modem will use the Interface Protocol to communicate with the running software package.

Command

Function

í \I0

Interface Protocol disabled.

\I1

Interface Protocol enabled.

LOCAL SERIAL PORT SPEED RESET

Type:

Immediate

Format:

AT [cmds] %U [cmds]

Description:

Instructs the modem to reset the rate of the local serial port to match the DTE’s next command.

RING INDICATOR (RI) SIGNAL

Type:

Configuration

Format:

AT [cmds] \Rn [cmds]

Description:

Selects when the RI signal will be cleared from an incoming call.

Command

Function

\R0

RI signal not cleared until the call has disconnected.

í \R1

RI signal cleared when call is answered.

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

AT [cmds] \Pn=<#>:xxxx

Description:

Writes the indicated telephone number into non-volatile memory at location n. The xxxx will be stored as a comment and will not be passed to the dial command.

Proprietary Microcom SX Command Set

ACCEPT MNP RELIABLE MODE

Type:

Immediate

Format:

[cmds];AR;[cmds]

Description:

Accept remote modem’s request for MNP reliable mode

ANSWER

Type:

Immediate

Format:

[cmds];A;[cmds]

Description:

Enables answer mode; the modem goes off-hook.

AUTO-ANSWER

Type:

Configuration

Format:

[cmds];AA xxx;[cmds]

Description:

Selects whether the modem will automatically answer incoming calls.

Command

Function

í AAOFF

Auto-answer disabled.

AAON

Auto-answer enabled.

AUTO-RELIABLE FALLBACK CHARACTER

Type:

Configuration

Format:

[cmds];SACn;[cmds]

[cmds];SAC/x;[cmds]

Default:

0

Range:

0-127

Unit:

1 ASCII character

Description:

Sets the character used as the auto-reliable fallback character; SAC0 will disable this function. With the second form of this command, the user may specify a character, rather than its ASCII value.

AUTO-RELIABLE TIME BUFFER CONFIGURATION

Type:

Configuration

Format:

[cmds];AUTn;[cmds]

Description:

Controls the handling of incoming data during auto-reliable time period

Command

Function

AUT0

Data is discarded.

AUT1

Data is buffered for 4 seconds or 200 characters.

AUT2

Data is discarded; modem returns to normal mode on receiving auto-reliable fallback character.

AUTO-RETRAIN

Type:

Configuration

Format:

[cmds];RTxx;[cmds]

Description:

Controls auto-retrain mode.

Command

Function

RTOFF

Auto-retrain disabled

í RTON

Auto-retrain enabled

BREAK SEND

Type:

Configuration

Format:

[cmds];Bn;[cmds]

Default:

3

Range:

1-9

Unit:

.1 second

Description:

Sends a break to the modem.

BREAK TYPE

Type:

Configuration

Format:

[cmds];SBRKn;[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

SBRK0

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.

SBRK1

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.

SBRK2

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.

SBRK3

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to remote modem immediately.

Send break to DTE immediately.

SBRK4

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.

SBRK5

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.

COMMAND ECHO AND RESULT CODES

Type:

Configuration

Format:

[cmds];SCExx;[cmds]

Description:

Sets whether the modem echoes commands entered and what format it sends result codes in.

Command

Function

í SCEOFF

Commands not echoed, result codes sent.

SCEON

Commands echoed, result codes sent in verbose format.

SCENO

Commands not echoed, result codes not sent.

SCENUM

Commands not echoed, command prompt not displayed, result codes sent in numeric format.

COMMUNICATIONS MODE

Type:

Configuration

Format:

[cmds];SNCn;[cmds]

Description:

Selects the communications mode the modem will operate in.

Command

Mode

í SNC0

Modem operates in asynchronous mode.

SNC1

Modem operates in synchronous connect mode and asynchronous off-line command mode.

SNC2

Modem operates in synchronous connect mode and auto-dials first stored number on high DTR.

SNC3

Modem operates in synchronous connect mode.

COMMUNICATION PROTOCOL

Type:

Configuration

Format:

[cmds];BELLxx;[cmds]

Description:

Selects the communication protocol for data calls.

Command

Protocol

BELLOFF

Use ITU-T protocols.

í BELLON

Use Bell protocols.

CONNECT MODE

Type:

Configuration

Format:

[cmds];SMxxx;[cmds]

Description:

Controls the type of connection the modem will make.

Command

Function

í SMNOR

Normal mode enabled.

SMDIR

Direct mode enabled.

SMREL

Reliable mode enabled.

SMAUT

Auto-reliable mode enabled.

CONNECT SPEED

Type:

Configuration

Format:

[cmds];SBn;[cmds]

Description:

Sets the speed the modem will connect at.

Command

Function

SB50

Selects 50bps.

SB75

Selects 75bps.

SB110

Selects 110bps.

SB150

Selects 150bps.

SB300

Selects 300bps.

SB1200

Selects 1200bps.

í SB2400

Selects 2400bps.

DATA CARRIER DETECT (DCD) SIGNAL

Type:

Configuration

Format:

[cmds];S1Cn;[cmds]

Description:

Controls the behaviour of the DCD signal.

Command

Function

í S1C0

DCD forced high.

S1C1

DCD forced high after carrier signal is detected.

S1C2

CD forced high except during disconnect.

DATA SET READY (DSR) AND CLEAR TO SEND (CTS) SIGNALS

Type:

Configuration

Format:

[cmds];S1Dn;[cmds]

Description:

Controls the behaviour of the DSR and CTS signals.

Command

Function

í S1D0

DSR and CTS forced high.

S1D1

CTS follows CD. If &C is not set to 1 then DSR also follows CD, otherwise it follows OH.

S1D2

DSR and CTS follow CD.

DIAL

Type:

Immediate

Format:

[cmds];D<#>

Description:

Dials the telephone number indicated 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

DL

Re-dial last number.

DNn

If the dial attempt fails, the modem will attempt to dial stored number n.

DP

Pulse dialing enabled.

DR

Answer mode enabled; originate mode disabled following handshake initiation.

DS

Dial the first stored number.

DT

Tone dialing enabled.

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 Quiet 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/n

Dial stored telephone number n.

D;

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

DIAL REPEATEDLY

Type:

Immediate

Format:

[cmds];RD<#>;[cmds]

Description:

Dials the number indicated up to ten times, pausing a few seconds between attempts.

DISPLAY CONFIGURATION - CONNECTION

Type:

Immediate

Format:

[cmds];HELP;[cmds]

Description:

Displays settings pertaining to the current connection.

DISPLAY CONFIGURATION - CONNECTION

Type:

Immediate

Format:

[cmds];RS3;[cmds]

Description:

Displays settings pertaining to the current connection.

DISPLAY CONFIGURATION - GENERAL

Type:

Immediate

Format:

[cmds];RS2;[cmds]

Description:

Displays general settings of the current configuration.

DISPLAY CONFIGURATION - SERIAL PORT

Type:

Immediate

Format:

[cmds];RS;[cmds]

Description:

Displays settings pertaining to the serial port.

DISPLAY S-REGISTERS

Type:

Immediate

Format:

[cmds];REGS;[cmds]

Description:

Displays the settings of all S-registers.

DISPLAY STORED NUMBERS

Type:

Immediate

Format:

[cmds];RP;[cmds]

Description:

Displays all stored phone numbers.

DATA TERMINAL READY (DTR) SIGNAL

Type:

Configuration

Format:

[cmds];SDn;[cmds]

Description:

Controls the modem’s response to the DTR signal.

Command

Function

SD0

Modem does not respond to DTR. Modem disconnects when receiving a break of over 500ms.

SD1

Modem goes to command mode when DTR goes low.

í SD2

Modem disconnects when DTR goes low and waits for the user to enter the characters "4 5" to configure the speed and parity of the serial port.

SD3

Modem is initialized when DTR goes low and waits for the user to enter the characters "4 5" to configure the speed and parity of the serial port.

ECHO DATA

Type:

Configuration

Format:

[cmds];SDExx;[cmds]

Description:

Enables modem to echo data received from DTE.

Command

Function

í SDEOFF

Data echo disabled

SDEON

Data echo enabled

ENHANCED DIAL MODE

Type:

Configuration

Format:

[cmds];DCxx;[cmds]

Description:

Selects whether the modem will use AX enhanced dialing modes.

Command

Function

DCON

Enhanced dialing enabled.

DCOFF

Enhanced dialing disabled.

ESCAPE SEQUENCE

Type:

Immediate

Format:

<CTRL>-A

Description:

Initiates the escape sequence and returns the modem to the on-line command state.

Note:

This character can be changed by the SE command.

ESCAPE SEQUENCE CHARACTER

Type:

Configuration

Format:

[cmds];SEn;[cmds]

[cmds];SE/x;[cmds]

Default:

1

Range:

0-127

Unit:

1 ASCII character

Description:

Sets the character used as for the escape sequence; SE0 will disable the escape sequence. With the second form of this command, the user may specify a character, rather than its ASCII value.

FACTORY DEFAULT PROFILE

Type:

Configuration

Format:

[cmds];INIT;[cmds]

Description:

Resets modem to values found in the factory profile.

FLOW CONTROL - MODEM TO MODEM

Type:

Configuration

Format:

AT [cmds] SFMn [cmds]

Description:

Selects modem to modem flow control.

Command

Function

SFM0

Flow control disabled.

SFM1

Flow control enabled.

FLOW CONTROL TYPE

Type:

Configuration

Format:

[cmds];SF1n;[cmds]

Description:

Sets type of flow control used by the modem.

Command

Function

SF10

Flow control disabled.

SF11

Bidirectional XON/XOFF flow control enabled.

SF12

CTS flow control by DCE enabled.

SF13

Bidirectional RTS/CTS flow control enabled.

GUARD TONE

Type:

Configuration

Format:

[cmds];SGn;[cmds]

Description:

Commands the modem to transmit a guard tone.

Command

Function

í SG0

Guard tone disabled

SG1

550Hz guard tone enabled

SG2

1800Hz guard tone enabled

HANG UP

Type:

Immediate

Format:

[cmds];H;[cmds]

Description:

Hangs up the line.

INACTIVITY TIMER

Type:

Configuration

Format:

[cmds];SITn;[cmds]

Default:

0

Range:

0-90

Unit:

1 minute

Description:

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

INTERFACE PROTOCOL

Type:

Configuration

Format:

[cmds];IPxx;[cmds]

Description:

Selects whether the modem will use the Interface Protocol to communicate with the running software package.

Command

Function

í IPOFF

Interface Protocol disabled.

IPON

Interface Protocol enabled.

LINE TYPE

Type:

Configuration

Format:

AT [cmds] SLLxx [cmds]

Description:

Selects line type.

Command

Line Type

í SLLOFF

Switched line.

SLLON

Leased-line.

LOCAL SERIAL PORT SPEED

Type:

Configuration

Format:

[cmds];S1Bn;[cmds]

Description:

Sets the speed that the modem will communicate with the DTE.

Command

Function

S1B50

Sets the serial port to 50bps.

S1B75

Sets the serial port to 75bps.

S1B110

Sets the serial port to 110bps.

S1B150

Sets the serial port to 150bps.

S1B300

Sets the serial port to 300bps.

S1B600

Sets the serial port to 600bps.

S1B1200

Sets the serial port to 1200bps.

S1B2400

Sets the serial port to 2400bps.

S1B4800

Sets the serial port to 4800bps.

S1B9600

Sets the serial port to 9600bps.

LOCK SERIAL PORT

Type:

Configuration

Format:

[cmds];BAxx;[cmds]

Description:

Sets operation of serial port speed.

Command

Function

í BAOFF

Serial speed locked.

BAON

Serial speed follows connect speed.

MICROCOM BANNER

Type:

Configuration

Format:

[cmds];BANxx;[cmds]

Description:

Selects whether the modem will transmit the Microcom banner to the DTE on reset and initialization.

Command

Function

BANOFF

Banner disabled.

í BANON

Banner enabled.

MAXIMUM BLOCK SIZE FOR TRANSMISSION

Type:

Configuration

Format:

[cmds];BLKn;[cmds]

Description:

Sets the maximum transmittable block size in MNP mode.

Command

Function

BLK0

MNP block size is 64 characters.

BLK1

MNP block size is 128 characters.

BLK2

MNP block size is 192 characters.

í BLK3

MNP block size is 256 characters.

MNP - STREAM/BLOCK MODE

Type:

Configuration

Format:

[cmds];BLxx;[cmds]

Description:

Selects the transfer mode for MNP links.

Command

Function

í BLOFF

Stream mode for MNP enabled.

BLON

Block mode for MNP enabled.

ON-LINE

Type:

Immediate

Format:

[cmds];E

Description:

Instructs the modem to return to the on-line state.

ON-LINE WITH RETRAIN

Type:

Immediate

Format:

[cmds];ER

Description:

Instructs the modem to return to the on-line state and initiate a retrain sequence.

PAUSE DURATION

Type:

Configuration

Format

[cmds];SPTn;[cmds]

Default:

3

Range:

0-255

Unit:

1 second

Description:

Duration of pause per comma (,) command used in a command or dial string.

PULSE DIALING RATIO

Type:

Configuration

Format:

[cmds];SDPn;[cmds]

Description:

Selects pulse dial make/break ratio.

Command

Function

í SDP0

39/61ms at 10pps (North America).

SDP1

33/67ms at 10pps (Europe).

READY TO SEND (RTS) AND CLEAR TO SEND (CTS) SIGNALS

Type:

Configuration

Format:

[cmds];CRTSn;[cmds]

Description:

Controls the behaviour of the CTS and RTS signals.

Note:

This command only functions in synchronous mode.

Command

Function

í CRTS0

CTS follows RTS in data mode; RTS is ignored in command mode.

CRTS1

CTS forced high, RTS is ignored.

REPORT IDENTIFICATION

Type:

Immediate

Format:

[cmds];ID;[cmds]

Description:

Reports the product code and firmware revision.

RING INDICATOR (RI) SIGNAL

Type:

Configuration

Format:

[cmds];S1Rn;[cmds]

Description:

Selects when the RI signal will be cleared from an incoming call.

Command

Function

S1R0

RI signal not cleared until the call has disconnected.

í S1R1

RI signal cleared when call is answered.

SERIAL DATA FORMAT

Type:

Configuration

Format:

[cmds];S1Pn;[cmds]

Description:

Sets the word size and parity of the serial port.

Command

Function

S1P0

7 data bits, odd parity.

S1P1

7 data bits, even parity.

S1P2

7 data bits, MARK parity.

S1P3

7 data bits, SPACE parity.

í S1P4

8 data bits, no parity.

SOFT RESET

Type:

Immediate

Format:

[cmds];RESET;[cmds]

Description:

Restores the modem to the configuration previously saved in non-volatile RAM using the &W command.

SPEAKER MODE

Type:

Configuration

Format:

[cmds];SAn;[cmds]

Description:

Selects various speaker options.

Command

Function

í SA0

Speaker enabled until carrier signal detected.

SA1

Speaker enabled.

SA2

Speaker disabled.

SA3

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

STATUS REGISTERS

Type:

Configuration

Format:

Read: [cmds];Sn?;[cmds]

Write: [cmds];Sn=a;[cmds]

Description:

Writes to or reads from a specified register.

STORE TELEPHONE NUMBER

Type:

Configuration

Format:

[cmds];WPn <#>:xxxx

Description:

Writes the indicated telephone number into non-volatile memory at location n. The xxxx will be stored as a comment and will not be passed to the dial command.

SWITCH TO OR ACCEPT MNP RELIABLE MODE

Type:

Immediate

Format:

[cmds];SR;[cmds]

Description:

Requests to convert to MNP reliable mode from normal or direct mode. Also accepts a request to convert to MNP reliable mode.

SWITCH TO MNP RELIABLE MODE

Type:

Immediate

Format:

[cmds];OR;[cmds]

Description:

Requests to convert to MNP reliable mode from normal or direct mode.

SWITCH TO NORMAL MODE

Type:

Immediate

Format:

[cmds];SN;[cmds]

Description:

Switches to normal mode from MNP mode.

TEST MODES - TERMINATE

Type:

Immediate

Format:

[cmds];ET;[cmds]

Description:

Ends the test currently in progress.

TEST MODES - LOCAL ANALOG LOOPBACK

Type:

Immediate

Format:

[cmds];XA;[cmds]

Description:

Begins a local analog loopback test.

TEST MODES - LOCAL ANALOG LOOPBACK WITH SELF-TEST

Type:

Immediate

Format:

[cmds];YA;[cmds]

Description:

Begins a local analog loopback with self-test.

TEST MODES - LOCAL DIGITAL LOOPBACK

Type:

Immediate

Format:

[cmds];XL;[cmds]

Description:

Begins a local digital loopback test.

TEST MODES - REMOTE DIGITAL LOOPBACK REQUEST

Type:

Immediate

Format:

[cmds];RL;[cmds]

Description:

Requests a remote digital loopback test.

TEST MODES - REMOTE DIGITAL LOOPBACK REQUEST WITH DIAL

Type:

Immediate

Format:

[cmds];XD<#>

Description:

Dials the indicated number and requests a remote digital loopback test.

TEST MODES - REMOTE DIGITAL LOOPBACK WITH SELF-TEST REQUEST

Type:

Immediate

Format:

[cmds];RLT;[cmds]

Description:

Requests a remote digital loopback with self-test.

TEST MODES - REMOTE DIGITAL LOOPBACK WITH SELF-TEST REQUEST WITH DIAL

Type:

Immediate

Format:

[cmds];YD<#>

Description:

Dials the indicated number and requests a remote digital loopback with self-test.

TEST MODES - REMOTE DIGITAL LOOPBACK RESPONSE

Type:

Immediate

Format:

[cmds];RLBxx;[cmds]

Description:

Selects whether the modem will allow a requested remote digital loopback test.

Command

Function

RLBOFF

Modem will not allow a remote digital loopback test.

í RLBON

Modem will allow a remote digital loopback test.

XON/XOFF PASS-THROUGH

Type:

Configuration

Format:

[cmds];SXn;[cmds]

Description:

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

Command

Function

í SX0

XON/XOFF signals trapped by local modem

SX1

XON/XOFF passed through local modem

XON TRANSMIT

Type:

Immediate

Format:

[cmds];CMF;[cmds]

Description:

Sends an XON character to restart communications after a data character is misinterpreted as an XOFF character.