AUTO-NEGOTIATE
Type:	Configuration
Format:	AT %Gn
Example:	AT %G1 <CR>
Description:	Selects whether the modem will renegotiate speeds according to signal quality.
Command	Function
» %G0	Auto-negotiate disabled.
%G1	Auto-negotiate enabled.

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

AUTO-RETRAIN
Type:	Configuration
Format:	AT %En
Example:	AT %E1 <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 \B50 O<CR>
Default:	0
Range:	0-9
Unit:	.1 second
Description:	Sends break to modem.

BREAK TYPE
Type:		Configuration
Format:		AT [cmds] \Kn [cmds]
Example:		AT \K1 <CR>
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.

CALLING TONE
Type:	Configuration
Format:	AT [cmds] -Cn [cmds]
Example:	AT -C1 DT555-1212<CR>
Description:	Controls the transmission of the calling tone while dialing.
Command	Function
» -C0	Calling tone disabled.
-C1	Calling tone enabled.

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.
» \N3	LAP-M mode with fallback to MNPl mode enabled.
\N4	V.42 or disconnect enabled.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Example:	AT \V1 %C1<CR>
Description:	Selects extended result codes.
Command	Function
\V0	Extended result codes disabled.
\V1	MNP extended result codes enabled.
» \V2	V.42 extended result codes enabled.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Example:	AT G1 &M0<CR>
Description:	Selects modem port flow control.
Command	Function
» \G0	Flow control disabled.
\G1	Flow control enabled.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Qn [cmds]
Example:	AT \Q5<CR>
Description:	Sets type of flow control used by modem.
Command	Function
\Q0	Flow control disabled.
\Q1	Bidirectional XON/XOFF flow control enabled.
\Q2	CTS flow control by DTE enabled.
» \Q3	Bidirectional CTS/RTS flow control enabled.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T20<CR>
Default:	0
Range:	0-90
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S90=n [cmds]
Example:	AT S90=20<CR>
Default:	0
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] \Jn [cmds]
Example:	AT %L3 %B14 \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.

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.
I3	Reports device set name.

REPORT SIGNAL QUALITY
Type:	Immediate
Format:	AT %Q
Example:	AT %Q <CR>
Description:	Reports the quality of the current signal.
Value	Meaning
0	Signal quality is good.
1	Signal quality is fair.
2	Signal quality is poor.
3	Loss of equalization has occurred.

SLEEP TIMER
Format	AT [cmds] S30=n [cmds]
Example:	ATS30=40<CR>
Default:	10
Range:	0 - 90
Unit:	1 second
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.

V.42 HANDSHAKE
Type:	Configuration
Format:	AT -Jn
Example:	AT -J1 "H1<CR>
Description:	Selects whether the modem will negotiate V.42 mode.
Command	Function
-J0	V.42 negotiation disabled.
» -J1	V.42 negotiation enabled.

V.42bis MODE
Type:	Configuration
Format:	AT "Hn
Example:	AT -J1 "H1<CR>
Description:	Selects V.42bis operation.
Command	Function
"H0	V.42bis disabled.
"H1	V.42bis enabled on transmit only.
"H2	V.42bis enabled on receive only
» "H3	V.42bis enabled

V.42bis WORD LENGTH
Type:	Configuration
Format:	AT [cmds] "On [cmds]
Example:	AT"O24<CR>
Default:	32
Range:	6-250
Unit:	1 character
Description:	Sets length of V.42bis word.

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.