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
MSG	Red	On	Stored faxes exist
MSG	Red	Off	No faxes stored
FAX	Red	On	Modem is connected in FAX mode
FAX	Red	Off	Modem is not connected in FAX mode
14.4	Red	On	Modem connected at 14.4Kbps
14.4	Red	Off	Modem not connected at 14.4Kbps
V.32	Red	On	Modem is in V.32 mode.
V.32	Red	Off	Modem is not in V.32 mode.
V.42	Red	On	Modem is in V.42 mode.
V.42	Red	Off	Modem is not in V.42 mode.
DC	Red	On	Error correction enabled
DC	Red	Off	Error correction disabled
EC	Red	On	Error correction enabled
EC	Red	Off	Error correction disabled
FC	Red	On	Flow control enabled
FC	Red	Off	Flow control disabled
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Phone is ringing
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
RX	Red	On	Modem is receiving data
RX	Red	Off	Modem is not receiving data
TX	Red	On	Modem is transmitting data
TX	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-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.
%E2	Fallback/fall forward enabled.
%E3	Fallback/fall forward and fast hang-up enabled.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT *EC0 %C1 *AP0<CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
%C1	MNP5 enabled.
%C2	V.42bis enabled.
» %C3	MNP5 and V.42bis enabled.

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Example:	AT \B3 &W<CR>
Default:	3
Range:	1-9
Unit:	.1 second
Description:	Sends break to modem.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Example:	AT \K1 <CR>
Description:	Configures action of break signal.
Command	Function
\K0	Flow control disabled.
» \K3	RTS/CTS flow control enabled.
\K4	XON/XOFF flow control 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	Error correction mode enabled.
» \N3	MNP mode with fallback to normal mode enabled.
\N4	LAPM mode only enabled.
\N5	MNP mode enabled.

CONNECTION FAILURE CODES
Format	AT [cmds] S86? [cmds]
Example:	ATS86? <CR>
Default:	Read-only
Range:	0, 4 - 14
Unit:	None
Stored:	N/A
Description:	Reports codes which correspond to the possible causes of a connection failure.
Value	Meaning
0	No failure - normal hang-up.
4	Carrier signal lost.
5	No error-control detected for remote modem during feature negotiation.
6	Remote modem failed to respond to feature negotiation.
7	Local modem is asynchronous-only, remote modem is synchronous-only.
8	No common framing technique found.
9	No common protocol found.
10	Remote modem sent erroneous feature negotiation message.
11	Remote modem failed to send synchronous information.
12	No failure - remote modem disconnected normally.
13	Remote modem failed to respond after 10 re-transmissions same message.
14	Violation of negotiated protocol caused failure.

ERROR CORRECTION REJECTION
Format		AT [cmds] S36=n [cmds]
Example:		ATS36=0<CR>
Default:		Unidentified
Range:		0 - 7
Unit:		Bit-mapped
Description:		Configures the modem’s behavior if an error-correcting connection cannot be made.
Command	Function
0	Modem disconnects
3	Modem attempts normal connection.
4	Modem attempts MNP connection.
7	Modem attempts MNP connection. If it fails, modem attempts normal connection.

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
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 DISPLAY
Format		AT [cmds] S39? [cmds]
Example:		ATS39?<CR>
Default:		Read-only
Range:		0, 3 - 6
Unit:		None
Stored:		N/A
Description:		Contains the current flow control.
Value	Meaning
0	Flow control is disabled.
» 3	RTS/CTS flow control is enabled.
4	XON/XOFF flow control is enabled.
5	AFT XON/XOFF flow control is enabled.
6	RTS/CTS and XON/XOFF flow control enabled.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S33=n [cmds]
Example:	ATS33=20<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=20<CR>
Default:	17
Range:	0-255
Unit:	ASCII
Description:	Sets the character used to represent XON.

LEASED LINE RECEIVE LEVEL DISPLAY
Type:	Immediate
Format:	AT [cmds] %L [cmds] l
Example:	AT %L &W<CR>
Description:	Displays signal level for reception when in leased-line mode.

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.

NEGOTIATE LINE SPEED
Type:	Configuration
Format:	AT [cmds] %Q [cmds]
Example:	AT %Q &W<CR>
Description:	Displays signal quality.

SLEEP TIMER
Format	AT [cmds] S24=n [cmds]
Example:	ATS24=40<CR>
Default:	0
Range:	0 - 255
Unit:	1 second
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.