CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	DC power	CN4
Line in	CN2	Power switch	SW1
RS-232/422	CN3

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
TST	Red	On	Modem test executing
TST	Red	Off	Normal operation
HS	Red	On	Modem is operating at highest configured rate
HS	Red	Off	Modem is operating at less than highest rate
EC	Red	On	Error correction activated
EC	Red	Off	Error correction not activated
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
RD	Red	On	Modem is receiving data
RD	Red	Off	Modem is not receiving data
SD	Red	On	Modem is transmitting data
SD	Red	Off	Modem is not transmitting data
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
MR	Red	On	Power is on
MR	Red	Off	Power is off

AUTO BAUD
Type:	Register
Format:	AT [cmds] S78=n [cmds]
Example:	AT S78=0 &W<CR>
Description:	Allows modem to connect at remote modem’s modulation.
Command	Function
» S78=0	Auto baud enabled.
S78=1	Auto baud disabled.

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
» \CO	Data is discarded.
\C1	Data is buffered.
\C2	Data is discarded, resets to \C1 on receipt of autoreliable fallback character.

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] %An [cmds]
Example:	AT%A20<CR>
Default:	19
Range:	0-127
Unit:	ASCII
Description:	Sets the character used as the auto-reliable fallback character. %A0 will disable this function.

BAUD RATE ADJUST
Type:	Configuration
Format:	AT [cmds] \Jn [cmds]
Example:	AT &B0 \J0<CR>
Description:	Allows baud rate to follow serial port speed
Command	Function
» \J0	Baud rate adjust disabled.
\J1	Baud rate adjust enabled.

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Example:	AT \B3 &W<CR>
Range:	1-25
Default	3
Unit:	.1 second
Description:	Sends break to modem.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Example:	AT \K5 &W<CR>
Description:	Selects response to DTE break command.
Command	Function
\K0	Send break, clear buffer, enter command mode.
\K1	Send break, clear buffer
\K2	Send break, send data, enter command mode.
\K3	Send break. send data,
\K4	Send data, send break, enter command mode.
» \K5	Send data, send break.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT &B0 %C1 &I2<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	MNP mode with fallback to normal mode enabled.
\N4	V.42 mode only enabled.
\N5	V.42 mode with fallback to normal mode enabled.
\N6	V.42/MNP mode only enabled.
» \N6	V.42 mode with fallback to normal mode enabled.

CTS SIGNAL
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Example:	AT \D0<CR>
Description:	Selects the function of the CTS signal.
Command	Function
\D0	CTS forced high.
» \D1	CTS follows DTR.

ECHO DATA
Type:	Configuration
Format:	AT [cmds] \En [cmds]
\Example:	AT \E0 <CR>
Description:	Enables modem to echo received data.
Command	Function
\E0	Data echo disabled.
» \E1	Data echo enabled.

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.

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 DCE enabled.
» \Q3	Bidirectional CTS/RTS flow control enabled.
\Q4	XON/XOFF flow control by DCE enabled.

HELP SCREENS
Type:	Immediate
Format:	AT %H
Example:	AT %H<CR>
Description:	Displays list of AT commands and their descriptions

INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T20<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.

LAP-M FRAME SIZE
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Example:	AT \A3 %C1<CR>
Description:	Sets the maximum number of characters per frame of data.
Command	Function
\A0	Maximum frame size is 64
\A1	Maximum frame size is 128
\A2	Maximum frame size is 192
» \A3	Maximum frame size is 256

MODE SELECTION
Type:	Immediate
Format:	AT [cmds] +FCLASS=n
Example:	AT +FCLASS=8<CR>
Description:	Sets what mode the modem will operate in.
Command	Function
+FCLASS=0	Data mode.
+FCLASS=1	Class 1 fax mode.
+FCLASS=2	Class 2 fax mode.
+FCLASS?	Displays current setting

MODULATION SELECT
Type:	Configuration
Format:	AT [cmds] %Mn [cmds]
Example:	AT %M0 &W<CR>
Description:	Selects whether V.34 or V.FC is used at 28.8Kbps
Command	Function
» %M0	V.34 and V.FC enabled.
%M1	V.34 only enabled.
%M2	V.FC only enabled.

PROTOCOL/SPEED
Type:	Immediate
Format:	AT [cmds] %Bn [cmds]
Example:	AT %B14400<CR>
Description:	Selects the current DCE speed.
Command	Function
%B300	Select V.21 or Bell103 at 300bps speed.
%B1200	Select V.22,V.23 or Bell 212A at 1200bps speed.
%B2400	Select V.22 at 2400bps speed.
%B4800	Select V.34 at 4800bps speed.
%B7200	Select V.34 at 7200bps speed.
%B9600	Select V.34 at 9600bps uncoded speed.
%B12000	Select V.34 at 12Kbps speed.
%B14400	Select V.34 at 14.4Kbps speed.
%B16800	Select V.34 at 16.8Kbps speed.
%B19200	Select V.34 at 19.2Kbps speed.
%B21600	Select V.34 at 21.6Kbps speed.
%B24000	Select V.34 at 24Kbps speed.
%B26400	Select V.34 at 26.4Kbps speed.
» %B28800	Select V.34 at 28.8Kbps speed.
%BL2400	Select V.22bis at 2400Kbps speed.
%BL4800	Select V.32bis/V.32 at 4800Kbps speed.
%BL7200	Select V.32bis at 7200Kbps speed.
%BL9600	Select V.32bis/V.32 at 9600Kbps speed.
%BL12000	Select V.32bis at 12Kbps speed.
%BL14400	Select V.32bis at 14.4Kbps speed.

V.32bis AUTO-RETRAIN
Type:	Register
Format:	AT [cmds] S76=n [cmds]
Example:	AT S76=0 &W<CR>
Description:	Selects action the modem will take during bad line quality on 32bis connection.
Command	Function
» S76=0	Auto retrain enabled.
S76=1	Auto retrain disabled.

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.