2400 BPS INTERNAL MODEM (REV. A) modem/telephone/ISDN Settings and Configuration

Card Type	Data (asynchronous)
Chip Set	Unidentified
Maximum Transfer Rate	2400bps
Data Bus	8-bit ISA
Data Modulation Protocol	Bell 103/113/212A ITU-T V.22, V.22bis
Error Correction/Compression	MNP5, X.PC

CONNECTIONS
Function	Label		Function		Label
Line out		CN1		Line in		CN2

USER CONFIGURABLE SETTINGS
Setting	Label	Position
Factory configured - Do not alter	SW1/3	Open
Factory configured - Do not alter	SW1/4	Open

SERIAL PORT ADDRESS
Setting	SW1/1	SW1/2
COM1 (3F8h)	Closed	Open
í COM2 (2F8h)	Open	Open
COM3 (3E8h)	Closed	Closed
COM4 (2E8h)	Open	Closed

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Configuration
Format:	AT [cmds] %An [cmds]
Default:	0
Range:	0-127
Unit:	ASCII
Description:	Sets the character used as the auto-reliable fallback character. %A0 will disable this function.

AUTO-RELIABLE TIME BUFFER CONFIGURATION
Type:	Configuration
Format:	AT [cmds] \Cn [cmds]
Description:	Controls the handling of incoming data during auto-reliable time period
Command	Function
í \C0	Data is discarded
\C1	Data is buffered
\C2	Data is discarded, modem returns to normal mode on receiving auto-reliable fallback character

BIT-MAPPED REGISTER S14
Format		AT [cmds] S14=n [cmds]
Default:		Unidentified
Range:		0-174
Unit:		Bit-mapped
Description:		Controls echo, result codes, result code display, dial mode, and answer/originate mode.
Bit	Value	Function
0	0	Not used
1	0 1	Command echo disabled Command echo enabled
2	0 1	Result codes enabled Result codes disabled
3	0 1	Display result codes in numeric format Display result codes in verbose format
4	0	Not used
5	0 1	Tone dial enabled Pulse dial enabled
6	0	Not used
7	0 1	Answer mode enabled Originate mode enabled

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Default:		Unidentified
Range:		0-184
Unit:		Bit-mapped
Description:		Selects low DTR action, DCD signal, and the long space disconnect function.
Bit	Value	Function
2 - 0	0	Not used.
4, 3	00 01 10 11	DTR Forced Modem goes to command mode on low DTR Modem disconnects on low DTR. Auto-Answer is disabled. Modem is initialized on low DTR
5	0 1	DCD forced high DCD normal
6	0	Not used
7	0 1	Long space disconnect function disabled Long space disconnect function enabled

BIT-MAPPED REGISTER S22
Format		AT [cmds] S22=n [cmds]
Default:		Unidentified
Range:		0-252
Unit:		Bit-mapped
Description:		Controls speaker controls, limits results codes, and make/break ratio.
Bit	Value	Function
1, 0	0	Not used
3, 2	00 01 10 11	Speaker off Speaker off on carrier Speaker always on Speaker on during handshake
6, 5, 4	000 100 101 110 111	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	39/61ms at 10pps (North America) 33/67ms at 10pps (Europe)

BIT-MAPPED REGISTER S23
Format		AT [cmds] S23=n [cmds]
Default:		Unidentified
Range:		0-187
Unit:		Bit-mapped
Description:		Grants/denies remote digital loopback, controls DTE rate and parity, and sets guard tone.
Bit	Value	Function
0	0 1	Remote digital loopback denied Remote digital loopback allowed
3, 2, 1	000 010 011 101	Sets serial port speed to 0-300bps Sets serial port speed to 1200bps Sets serial port speed to 2400bps Sets serial port speed to 9600bps
5,4	00 01 10 11	Parity even Space Parity Parity odd Mark/No Parity
7, 6	00 01 10	Guard tone disabled Guard tone 550Hz enabled Guard tone 1800Hz enabled

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Description:	Selects data compression
Command	Function
%C0	Data compression disabled
í %C1	Data compression enabled

DISPLAY CURRENT COMMAND STATUS
Type:	Immediate
Format:	AT [cmds] \S [cmds]
Description:	Displays current setting of modem commands

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Description:	Sets connect mode
Command	Function
\N0	Normal mode enabled
í \N1	Direct mode enabled
\N2	MNP reliable mode enabled
\N3	MNP auto-reliable mode enabled
\N4	X.PC mode only enabled
\N5	MNP/X.PC answer mode enabled

CONVERT TO RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \Y [cmds]
Description:	Initiates reliable mode link

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Description:	Dials telephone number according to any modifiers included in the string
Modifier	Function
D,	Dialing paused for amount of time specified in S8 register
DT	Tone dialing enabled
DP	Pulse dialing enabled
DR	Reverse mode
DS=n	Number in memory location n dialed
D;	Modem returned to command mode after dialing. The semicolon can only be placed at the end of the dial command
D!	Flash function initiated. Modem commanded to go on-hook for specified time
DW	Dialing resumed following dial tone detection
D@	Modem waits for a ring-back signal followed by 5 seconds of silence prior to executing the rest of the dial string
DX	Modem in X.PC mode for duration of call
DM	Modem in MNP auto-reliable mode for duration of call
DV	Modem in X.PC mode, send X.PC request string.

DISPLAY ALL S-REGISTERS
Type	Immediate
Format	AT [cmds] %R [cmds]
Description	Displays a value of all S-registers

DSR AND CTS SIGNALS
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Description:	Sets the function of the DSR and CTS signals
Command	Function
í \D0	DSR and CTS forced high
\D1	DSR forced high and CTS follows CD

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Description:	Selects modem port flow control
Command	Function
í \G0	Flow control disabled
\G1	Flow control enabled

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Qn [cmds]
Description:	Sets type of flow control used by modem
Command	Function
í \Q0	Flow control disabled
\Q1	XON/XOFF flow control enabled
\Q2	CTS flow control to DTE enabled
\Q3	RTS/CTS flow control enabled

INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] \Tn [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

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] \Jn [cmds]
Description:	Sets operation of serial port speed
Command	Function
í \J0	Serial speed locked
\J1	Serial speed follows connect speed

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Description:	Selects extended result codes
Command	Function
í \V0	Standard AT result codes enabled
\V1	Error correction result codes enabled

ON-LINE IN RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \O [cmds]
Description:	Returns to on-line and requests reliable mode connection

ON-LINE STATE/RDL TEST
Type	Configuration
Format	AT [cmds] On [cmds]
Description	Starts/ends remote digital loopback test and puts the modem in on-line command mode
Command	Function
O0	Return to on-line state
O1	End remote digital loopback test and return to on-line state
O2	Begin remote digital loopback test and return to on-line state

PACKET TRANSMISSION DELAY
Type	Register
Format	AT [cmds] S50=n [cmds]
Default	25
Range	10-255
Unit	1 ms
Description	Sets the maximum delay preceding a character from DTE until X.PC block is sent

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays modem properties
Command	Function
I0	Reports product code
I1	Reports checksum
I2	Reports checksum result

RETURN TO RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \Z [cmds]
Description:	Ends reliable mode link, initiate return to normal mode

TEST MODES
Format		AT [cmds] S16=n [cmds]
Default:		Unidentified
Range:		0-125
Unit:		Bit-mapped
Description:		Controls loopback tests, analog, digital, remote digital, and self tests.
Bit	Value	Function
0	0 1	Local analog loopback not in progress Local analog loopback in progress
1	0	Not used
2	0 1	Local digital loopback not in progress Local digital loopback in progress
3	0 1	Modem not in remote digital loopback Remote digital loopback in progress
4	0 1	Remote digital loopback not requested Remote digital loopback requested
5	0 1	Remote digital loopback w/ self-test not in progress Remote digital loopback w/ self-test in progress
6	0 1	Local analog loopback w/ self-test not in progress Local analog loopback w/ self-test in progress

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] \Xn [cmds]
Description:	Selects whether XON/XOFF signals are sent to remote modem
Command	Function
í \X0	XON/XOFF signals trapped by local modem
\X1	XON/XOFF passed through local modem

X.PC DISCONNECT
Type	Immediate
Format	AT [cmds] %H [cmds]
Description	Modem will disconnect but still remain connected to network node