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
EC	Red	On	Error correction enabled
EC	Red	Off	Error correction disabled
HS	Red	On	Modem is operating at highest configured speed
HS	Red	Off	Modem is operating at less than highest configured speed
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	DSR signal is high
MR	Red	Off	DSR signal is low

AT COMMAND RESPONSE
Type:	Regtster
Format:	AT [cmds] S84=n [cmds]
Example:	AT S84=0 &W<CR>
Description:	Sets the response to AT commands.
Command	Function
» S84=0	Normal operation
S84=1	Execute valid commands, suppress error codes.
S84=2	Ignore configuration commands, always return OK error code.

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 during V.32bis connection.
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:	Configuration
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.

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.

CELLULAR ENHANCEMENTS
Type:	Register
Format:	AT [cmds] S91=n [cmds]
Example:	AT S91=0 &W<CR>
Description:	Configures modem to enhanced cellular mode
Command	Function
» S91=0	Disabled
S91=1	Enabled

CD SIGNAL
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Example:	AT &C3 &B0<CR>
Description:	Configures the behavior of the carrier detect signal.
Command	Function
» &C0	CD forced high.
&C1	CD normal.
&C2	Blink on disconnect.
&C3	CD follows DTR.
&C4	Simulated control carrier.
&C5	CD follows DTR, forced low on disconnect.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT &B0 %C1 &I2<CR>
Description:	Selects V.42 and MNP 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	LAP-M mode only enabled.
\N5	LAP-M mode with fallback to normal mode enabled.
\N6	V.42/MNP only enabled.
» \N7	V.42/MNP with fallback to normal mode enabled.

CONNECTION SPEED UPPER LIMIT
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.32/V.32bis at 4800bps speed.
%B7200	Select V.32bis at 7200bps speed.
%B9600	Select V.32bis/V.32 at 9600bps speed.
%B12000	Select V.32bis at 12Kbps speed.
» %B14400	Select V.32bis at 14.4Kbps speed.

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 normal.
\D2	CTS interrupted for 2 seconds on disconnect.
\D3	CTS follows DTR.

DISCONNECT IMMEDIATELY
Type:	Configuration
Format:	AT [cmds] S85=n [cmds]
Example:	AT S85=0 &W<CR>
Description:	Disconnect immediately on receipt of disconnect signal from DTE or diagnostic control panel.
Command	Function
» S85=0	Disabled.
S85=1	Enabled.

FAX DISABLE
Type:	Configuration
Format:	AT [cmds] S79=n [cmds]
Example:	AT S79=1 &W<CR>
Description:	Enables V.17 fax capability
Command	Function
S79=0	Disable
» S79=1	Enable

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.
\Q5	XON/XOFF flow control by DTE enabled.
\Q6	RTS flow control by DTE enabled.

INACTIVITY TIMER
Type:	Register
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 frame size for V.42 and MNP connections.
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
\A4	Maximum frame size is 32
\A5	Maximum frame size is 16
Note: Maximum V.42 frame size is 128.

LAP-M FRAME WINDOW
Type:	Register
Format:	AT [cmds] S89=n [cmds]
Example:	ATS89=6<CR>
Default:	0
Range:	1-9
Unit:	1 frame (beginning with 0=6 frames)
Description:	Sets the number of frames used in V.42 and V.42bis transmissions

LINE SPEED
Type:	Register
Format:	AT [cmds] S41=n [cmds]
Example:	ATS41=6<CR>
Default:	1
Description:	Sets maximum line speed
Command	Function
» S41=1	14.4Kbps V.32bis
S41=2	12.0Kbps V.32bis
S41=3	9600bps V.32bis, V.32
S41=4	7200bps V.32bis
S41=5	4800bps V.32bis, V.32
S41=6	2400bps V.22bis
S41=7	1200bps V.22
S41=8	1200bps 212A
S41=10	0-300bps V21
S41=11	0-300bps 103j
S41=12	1200/75bps V.23
S41=13	75/1200bps V.23

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] S90=n [cmds]
Example:	AT S90=0<CR>
Description:	Sets operation of serial port speed.
Command	Function
S90=0	Disabled.
S90=1	Serial speed follows connect speed.

TRANSMISSION LEVEL
Type:	Register
Format:	AT [cmds] &In [cmds]
Example:	AT &I26 &W<CR>
Default:	0
Range:	-10dBm to -.25dBm
Unit:	-1 dBm
Description:	Sets the signal level for transmission

TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] &J0 [cmds]
Example:	AT &J0 &W<CR>
Description:	Sets permissive mode

V.32bis AUTO-RETRAIN
Type:	Configuration
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.
S76=2	Auto retrain started at 4800bps.
S76=3	Auto retrain started at 9600bps

V.32bis TRAIN
Type:	Register
Format:	AT [cmds] S43=n [cmds]
Example:	AT S43=0 &W<CR>
Description:	Sets train length. Cellular setting is short.
Command	Function
» S43=0	Long
S43=1	Short

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.