CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	Line in	CN2

BASE I/O ADDRESS SELECTION
Port	SW1/1	SW1/2	SW1/3	SW1/4
COM1: (3F8h)	On	Off	Off	Off
COM2: (2F8h)	Off	On	Off	Off
COM3: (3E8h)	Off	Off	On	Off
» COM4: (2E8h)	Off	Off	Off	On

INTERRUPT SELECTION
IRQ	JP1/A	JP1/B	JP1/C	JP1/D
2	Open	Open	Open	Closed
» 3	Closed	Open	Open	Open
4	Open	Closed	Open	Open
5	Open	Open	Closed	Open

AUTO-RETRAIN
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Description:	Selects auto-retrain mode
Command	Function
» %E0	Auto-retrain disabled
%E1	Auto-retrain enabled

BIT-MAPPED REGISTER S14
Format		AT [cmds] S14? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays echo, result codes, dial mode, and originate/answer mode
Bit	Value		Function
0	0		Not used
1	0 1		Command echo function disabled Command echo function enabled
2	0 1		Result code sending enabled Result code sending disabled
3	0 1		Numeric format enabled Verbose format enabled
4	0		Not used
5	0 1		Tone dialing mode enabled Pulse dialing mode enabled
6	0		Not used
7	0 1		Answer mode enabled Originate mode enabled

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21? [cmds]
Default:		Read-only
Range:		0 - 255
Unit:		Bit-mapped
Description:		Displays jack type, CTS signal, low DTR action, DCD signal, DSR signal, and the long space disconnect function
Bit	Value		Function
0	0 1		Selects RJ-11, RJ-41S, or RJ45S jack Selects RJ-12 or RJ-13 jack
1	0		Not used
2	0 1		CTS follows RTS CTS forced high
4, 3	00 01 10 11		DTR signal ignored Modem goes to command mode on low DTR Modem disconnects on low DTR. Auto-Answer is disabled. Modem is initialized on low DTR
5	0 1		DCD forced high DCD normal
6	0 1		DSR forced high DSR normal
7	0 1		Long space disconnect function disabled Long space disconnect function enabled

BIT-MAPPED REGISTER S22
Format		AT [cmds] S22? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays speaker volume and controls
Bit	Value		Function
1, 0	00 01 10 11		Off volume On volume Medium level volume High level volume
3, 2	00 01 10 11		Speaker off Speaker off on carrier Speaker always on Speaker on during handshake

BIT-MAPPED REGISTER S23
Format		AT [cmds] S23? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays DTE rate and parity
Bit	Value		Function
0	0		Not used
3, 2, 1	000 001 010 011 100 101 110		Sets serial port speed to 0-300bps Sets serial port speed to 600bps Sets serial port speed to 1200bps Sets serial port speed to 2400bps Sets serial port speed to 4800bps Sets serial port speed to 9600bps Sets serial port speed to 14400bps
5,4	00 01 10 11		Parity even Space Parity Parity odd Mark /No Parity

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays synchronous/asynchronous mode, line type
Bit	Value		Function
3, 1, 0	000 001 010 011 101 110		Asynchronous mode Asynchronous command mode and synchronous connect mode Asynchronous command mode and synchronous connect mode, DTR forced high Asynchronous command mode on low DTR, synchronous connect mode on high DTR Error correction mode Buffered asynchronous mode
2	1		Leased line

BIT-MAPPED REGISTER S31
Format		AT [cmds] S31? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays automatic speed detection and result codes
Bit	Value		Function
0	0		Not used
1	0 1		Automatic speed detection disabled Automatic speed detection enabled
3, 2	00 01 10		DTE speed displayed in result codes Extended result codes enabled, DCE and DTE speed displayed in result codes. DCE speed displayed in result codes

BIT-MAPPED REGISTER S40
Format		AT [cmds] S40? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays break handling, MNP10, and block size
Bit	Value		Function
0	0 1		MNP10 disabled MNP10 enabled
2, 1	0		Not used
5, 4, 3	000 001 010 011 100 101		\K0 \K1 \K2 \K3 \K4 \K5
7, 6	00 01 10 11		MNP block size is 64 characters MNP block size is 128 characters MNP block size is 192 characters MNP block size is 256 characters

BIT-MAPPED REGISTER S41
Format		AT [cmds] S41? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Selects compression, auto-retrain, flow control, and MNP mode
Bit	Value		Function
1 - 0	00 01 10 11		Data compression disabled MNP5 enabled V.42bis enabled MNP5 and V.42bis enabled
2	0 1		Auto-retrain disabled Auto-retrain enabled
3	0 1		Flow control disabled Flow control enabled
4	0 1		Stream mode for MNP Block mode for MNP

BIT-MAPPED REGISTER S80
Format		AT [cmds] S80? [cmds]
Default:		Read-only
Range:		0-255
Unit:		Bit-mapped
Description:		Displays command sets, remote configuration, call back security, and answer/originate mode
Bit	Value		Function
0	0 1		AT command set enabled V.25bis command set enabled
1	0 1		Remote configuration disabled Remote configuration enabled
2	0 1		Call back security disabled Call back security enabled
3	0 1		Originate mode Answer mode

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Default:	3
Range:	1-9
Unit:	.1 second
Description:	Sends break to modem

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Description:	Configures action of break signal.
Command		Break from DTE	Modem receives \B	Break received from remote modem
\K0		Online command mode enabled, send no break to remote modem	Break sent to remote modem and buffered cleared	Buffers cleared, break sent to DTE
\K1		Break sent to remote modem and buffered cleared	Break sent to remote modem and buffered cleared	Buffers cleared, break sent to DTE
\K2		Online command mode enabled, send no break to remote modem	Send break to remote modem immediately	Break sent immediately to DTE
\K3		Send break to remote modem immediately	Send break to remote modem immediately	Break sent immediately to DTE
\K4		Online command mode enabled, send no break to remote modem	Send break with transmitted data	Break sent with received data to the DTE
» \K5		Send break with transmitted data	Send break with transmitted data	Break sent with received data to the DTE

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Description:	Selects data compression
Command	Function
%C0	Data compression disabled
%C1	MNP5 enabled
%C2	V.42bis enabled
» %C3	MNP5 and V.42bis enabled

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Description:	Sets connect mode
Command	Function
\N0	Normal mode enabled
\N1	Direct mode enabled
\N2	LAP-M mode with fallback to MNP enabled
» \N3	MNP mode with fallback to normal mode enabled
\N4	LAP-M mode only enabled
\N5	MNP mode only enabled

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

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

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S33=n [cmds]
Default:	19
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XOFF

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Default:	17
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XON

LINE SIGNAL LEVEL
Type:	Immediate
Format:	AT [cmds] %L [cmds]
Range:	9-43
Unit:	-1dBm
Description:	Returns recieved line signal level

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Description:	Sets the maximum transmittable block size
Command	Function
\A0	Maximum MNP block size is 64 characters
\A1	Maximum MNP block size is 128 characters
\A2	Maximum MNP block size is 192 characters
» \A3	Maximum MNP block size is 256 characters

MNP STREAM/BLOCK MODE
Type:	Configuration
Format:	AT [cmds] \Ln [cmds]
Description:	Selects the transfer mode for MNP
Command	Function
» \L0	Stream mode for MNP enabled
\L1	Block mode for MNP enabled

SLEEP TIMER
Format	AT [cmds] S24=n [cmds]
Default:	Unidentified
Range:	0-255
Unit:	10 seconds
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode

V.23 SPEED DIRECTION
Type:	Configuration
Format:	AT [cmds] %Fn [cmds]
Description:	Selects V.23 speed and direction
Command	Function
%F1	75bps transmit/1200bps receive enabled
%F2	75bps receive/1200bps transmit enabled
%F3	V.23 split baud mode disabled

V.23 SPLIT BAUD MODE
Type:	Configuration
Format:	AT [cmds] \Wn [cmds]
Description:	Controls V.23 split baud mode
Command	Function
» \W0	V.23 split baud mode disabled
\W1	V.23 split baud mode enabled

DISPLAY STORED NUMBERS
Type:	Immediate
Format:	RLI
Description:	Requests the modem to return the list of station IDs. If no numbers are stored, the modem will return LSI

DISPLAY STORED NUMBERS
Type:	Immediate
Format:	RLNn
Description:	Requests the modem to return the stored number in memory location n. If no number is given, all stored numbers will be displayed. If no numbers are stored, the modem will return LSN.

STATION ID LIST
Type:	Result code
Format:	LSInnn;<#>;xxxx
Description:	Displays station IDs

STATION ID SET
Type:	Configuration
Format:	PRInn;<#>;xxxx
Description:	Records station ID, with n = 1-20.

STORED NUMBERS LIST
Type:	Result code
Format:	LSNxxxx
Description:	Displays stored numbers. xxxx may specify a memory location, phone number, or status. If no code was specified with RLN, all stored numbers are displayed.