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
MR	Red	On	Power is on
MR	Red	Off	Power is off
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
SD	Red	Blinking	Modem is transmitting data
SD	Red	Off	Modem is not transmitting data
RD	Red	Blinking	Modem is receiving data
RD	Red	Off	Modem is not receiving data
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Phone is ringing
HS	Red	Blinking	Modem is in test mode or detected an error
HS	Red	On	Modem is operating at 9600bps or faster
HS	Red	Off	Modem is not operating faster than 9600bps

ACCEPT RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \U [cmds]
Example:	AT \U B1<CR>
Description:	Accepts remote modem’s request for reliable link.

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.

BTI-MAPPED REGISTERS
Register	Default
S14	Unidentified
S21	Unidentified
S22	Unidentified
S23	Unidentified
S27	Unidentified
S40	57
S41	1

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.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] \Kn [cmds]
Example:	AT \K5 <CR>
Description:	Configures action of break signal.
Command	Function
\K0	Online command mode enabled, send no break to remote modem.
\K1	Break sent to remote modem and buffered cleared.
\K3	Send break to remote modem immediately.
» \K5	Send break with transmitted data.

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

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Mn [cmds]
Example:	AT %M3 <CR>
Description:	Selects data compression.
Command	Function
%M0	Data compression disabled.
%M1	Data compression enabled on transmit only.
%M2	Data compression enabled on receive only.
» %M3	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	Reliable mode enabled.
» \N3	Auto-reliable mode enabled.

CONVERT TO RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \Y [cmds]
Example:	AT \Y<CR>
Description:	Initiates reliable mode link.

ECHO OPTIMIZATION
Type:	Immediate
Format:	AT [cmds] \En [cmds]
Example:	AT \E1 <CR>
Description:	Enables modem echo optimization.
Command	Function
\E1	One shot optimization enabled.

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

INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T0<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.

LINE SIGNAL LEVEL
Type:	Immediate
Format:	AT [cmds] %L [cmds]
Example:	AT %L &W<CR>
Description:	Returns recieved line signal level.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Example:	AT \A2 &MB28800<CR>
Description:	Sets the maximum transmittable block size.
Command	Function
\A0	Maximum MNP block size is 64 characters.
\A1	Maximum MNP block size is 128 characters.
» \A2	Maximum MNP block size is 192 characters.
\A3	Maximum 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.

ON-LINE IN RELIABLE MODE
Type:	Immediate
Format:	AT [cmds] \O
Example:	AT \O <CR>
Description:	Returns to on-line and requests reliable mode connection.

REPORT SIGNAL QUALITY
Type:	Immediate
Format:	AT [cmds] %Q [cmds]
Example:	AT %Q &W<CR>
Description:	Reports signal quality.

SWITCH TO MNP MODE
Type:	Immediate
Format:	AT [cmds] \Z [cmds]
Example:	AT \Z &W<CR>
Description:	Switches to normal mode from MNP mode.

TEST MODES
Format		AT [cmds] S16=n [cmds]
Example:		ATS16=0<CR>
Default:		0
Range:		0-125
Unit:		Bit-mapped
Description:		Controls loopback tests, analog, digital, remote digital, and self tests.
Bit	Value		Function
0	0 1		Local analog loopback not in progress. Local analog loopback in progress.
1	0		Not used.
2	0 1		Local digital loopback not in progress. Local digital loopback in progress.
3	0 1		Modem not in remote digital loopback. Remote digital loopback in progress.
4	0 1		Remote digital loopback not requested. Remote digital loopback requested.
5	0 1		Remote digital loopback w/ self-test not in progress. Remote digital loopback w/ self-test in progress.
6	0 1		Local analog loopback w/ self-test not in progress. Local analog loopback w/ self-test in progress.

V.42bis DICTIONARY CLEAR
Type:	Immediate
Format:	AT [cmds] %P [cmds]
Example:	AT %P &W<CR>
Description:	Clears V.42bis dictionary.

V.42bis DICTIONARY SIZE
Type:	Configuration
Format:	AT [cmds] %Dn [cmds]
Example:	AT %D2 &W<CR>
Description:	Controls V.42bis dictionary size.
Command	Function
%D0	512 bytes.
%D1	1024 bytes.
» %D2	2048 bytes
%D3	4096 bytes (one way compression only)

V.42bis MAXIMUM STRING LENGTH
Type:	Configuration
Format:	AT [cmds] %Sn [cmds]
Example:	AT %S32 <CR>
Default:	32
Range:	6 - 64
Unit:	Unidentified
Description:	Selects string size for V.42bis compression.