CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	Line in	CN2

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

INTERRUPT SELECTION
IRQ	SW1/A	SW1/B	JP1	JP2	JP3
2	Off	Off	Open	Open	Closed
3	On	Off	Open	Open	Open
4	Off	On	Open	Open	Open
5	Off	Off	Open	Closed	Open
7	Off	Off	Closed	Open	Open

AUTO-RETRAIN
Type:	Configuration
Format:	AT %En
Example:	AT %E0 <CR>
Description:	Selects auto-retrain mode.
Command	Function
%E0	Auto-retrain disabled.
%E1	Auto-retrain enabled.

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Example:	AT \B3 &W<CR>
Range:	1-9
Unit:	.1 second
Description:	Sends break to modem.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Example:	AT \K0 <CR>
Description:	Configures action of break signal.
Command		Break from DTE	Modem receives \B	Break from remote modem
\K0		Enter command mode, do not send break to remote modem.	Buffers cleared and break sent to remote modem.	Buffers cleared and break sent to DTE.
\K1		Buffers cleared and break sent to remote modem.	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.	Send break to DTE immediately.
\K3		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 with transmitted data.	Break sent with received data to the DTE.
\K5		Send break with transmitted data.	Send break to remote modem with transmitted data.	Break sent with received data to the DTE.

COMPRESSION
Type:	Configuration
Format:	AT [cmd] %Cn [cmd]
Example:	AT %C0 &W<CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
%C1	Data compression enabled.
%C2	V.42bis enabled.
%C3	V.42bis and MNP5 enabled.

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Example:	AT \N0 DT555-1212<CR>
Description:	Sets connect mode.
Command	Function
\N0	Normal mode enabled.
\N1	Direct mode enabled.
\N2	Reliable mode enabled.
\N3	Auto-reliable mode enabled.
\N4	LAPM mode enabled.
\N5	MNP mode enabled.

FLASH DIAL MODIFIER TIME
Format	AT [cmds] S29=n [cmds]
Example:	ATS29=0<CR>
Default:	0
Range:	0-255
Unit:	10 ms
Description:	Time the modem will go on-hook upon receiving the ! dial modifier in dial string.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S33=n [cmds]
Example:	ATS33=19<CR>
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]
Example:	ATS32=17<CR>
Default:	17
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XON.

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

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Example:	AT \A3 %C1<CR>
Description:	Sets the maximum transmittable block size.
Command	Function
\A0	MNP block size is 64 characters.
\A1	MNP block size is 128 characters.
\A2	MNP block size is 192 characters.
\A3	MNP block size is 256 characters.

MNP STREAM/BLOCK MODE
Type:	Configuration
Format:	AT [cmds] \Ln [cmds]
Example:	AT \L1 DT555-1212<CR>
Description:	Selects the transfer mode for MNP.
Command	Function
\L0	Stream mode for MNP enabled.
\L1	Block mode for MNP enabled.

MODULATION SELECTION
Type:	Configuration
Format:	AT [cmds] +MS=xx,y,zzz,aaa [cmds]
Example:	AT +MS11,1,300,28800 &W<CR>
Description:	Sets options for active protocol. The transfer rates specified by z and a must be valid for the protocol selected.
Command	Function
x=0	V.21
x=1	V.22
x=2	V.22bis
x=3	V.23
x=9	V.32
x=10	V.32bis
x=11	V.34
x=64	Bell 103A
x=69	Bell 212A
x=74	V.FC
y=0	Automode disabled.
y=1	Auto-detect highest speed enabled.
z, a=300	Set minimum or maximum transfer rate at 300bps, respectively.
z, a=1200	Set minimum or maximum transfer rate at 1200bps, respectively.
z, a=2400	Set minimum or maximum transfer rate at 2400bps, respectively.
z, a=4800	Set minimum or maximum transfer rate at 4800bps, respectively.
z, a=7200	Set minimum or maximum transfer rate at 7200bps, respectively.
z, a=9600	Set minimum or maximum transfer rate at 9600bps, respectively.
z, a=12000	Set minimum or maximum transfer rate at 12000bps, respectively.
z, a=14400	Set minimum or maximum transfer rate at 14400bps, respectively.
z, a=16800	Set minimum or maximum transfer rate at 16800bps, respectively.
z, a=19200	Set minimum or maximum transfer rate at 19200bps, respectively.
z, a=21600	Set minimum or maximum transfer rate at 21600bps, respectively.
z, a=24000	Set minimum or maximum transfer rate at 24000bps, respectively.
z, a=26400	Set minimum or maximum transfer rate at 26400bps, respectively.
z, a=28800	Set minimum or maximum transfer rate at 28800bps, respectively.