AX/2400 modem/telephone/ISDN Settings and Configuration

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.

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.

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.