AUTO-RELIABLE FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] %An [cmds]
Example:	AT%A20<CR>
Default:	13
Range:	0-127
Unit:	ASCII
Description:	Sets the character used as the auto-reliable fallback character. %A0 will disable this function.

AUTO-RETRAIN
Type:	Configuration
Format:	AT S76=n
Example:	AT S76=1 <CR>
Description:	Selects auto-retrain mode for V.32bis.
Command	Function
» S76=0	Auto-retrain enabled.
S76=1	Auto-retrain disabled.
S76=2	Auto-retrain enabled; speed defaults to 4800bps.
S76=3	Auto-retrain enabled; speed defaults to 9600bps.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Example:	AT \K1 <CR>
Description:	Configures action of break signal.
Command	Function
\K0	Buffers cleared and break sent to remote modem, then enter command mode.
\K1	Buffers cleared and break sent to remote modem.
\K2	Send break to remote modem immediately, then enter command mode.
\K3	Send break to remote modem immediately.
\K4	Send break to remote modem with transmitted data, then enter command mode.
» \K5	Send break to remote modem with transmitted data.

CELLULAR PHONE TYPE
Type:	Configuration
Format:	AT )Cn
Example:	AT )C1<CR>
Description:	Selects the type of cellular phone that the modem is connected to.
Command	Function
» )C0	Motorola phone in use.
)C1	NEC P100 series or AT&T 3610 phone in use.
)C2	OKI 900, 1145, or 1150 or AT&T 3710, 3730, or 3760 phone in use.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT *EC0 %C1 *AP0<CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
» %C1	Data compression enabled.

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Example:	AT \N1 DT555-1212<CR>
Description:	Sets connect mode.
Command	Function
\N0	Normal mode enabled.
\N1	Direct mode enabled.
\N2	MNP mode only enabled.
\N4	LAP-M mode only enabled.
\N6	LAP-M mode with fallback to MNP enabled.
\N7	LAP-M mode with fallback to MNP and normal modes enabled.
» \N8	For 4800bps and above, use \N4. Use \N7 for lower speeds.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Example:	AT \G1 &K3<CR>
Description:	Selects modem port flow control.
Command	Function
» \G0	Flow control disabled.
\G1	Flow control enabled.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T20<CR>
Default:	Unidentified
Range:	0-255
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] S90=n [cmds]
Example:	AT %L3 %B14 S90=0<CR>
Description:	Sets operation of serial port speed.
Command	Function
» S90=0	Serial speed locked.
S90=1	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.
\A4	MNP block size is 32 characters.
\A5	MNP block size is 16 characters.

NEGOTIATE PROTOCOL
Type:	Configuration
Format:	AT S78=n
Example:	AT S78=1 <CR>
Description:	Configures whether the modem will attempt to negotiate protocols or if only the protocol selected in %Bn will be used.
Command	Function
» S78=0	Negotiation enabled.
S78=1	Negotiation disabled.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Example:	AT I3 &V1 %V<CR>
Description:	Displays modem properties.
Command	Function
I0	Reports product code.
I1	Reports firmware version in short form.
I2	Reports firmware checksum result.
I19	Reports firmware version in long form.

SWITCHED LINE TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Example:	AT &I15<CR>
Default:	9
Range:	10 - 25
Unit:	-1 dBm
Description:	Sets the signal level for transmission when in switched line mode.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] \Xn [cmds]
Example:	AT \X7 O<CR>
Description:	Selects whether XON/XOFF signals are sent to remote modem.
Command	Function
» \X0	XON/XOFF signals trapped by local modem.
\X1	XON/XOFF passed through local modem.