CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	DC power	CN4
Line in	CN2	Volume	R1
RS-232/422	CN3	Power switch	SW1

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
TD	Red	On	DTE is transmitting data
TD	Red	Off	DTE is not transmitting data
RD	Red	On	Modem is receiving data
RD	Red	Off	Modem is not receiving data
DTR	Red	On	DTR signal is high
DTR	Red	Off	DTR signal is low
CTS	Red	On	CTS signal is high
CTS	Red	Off	CTS signal is low
DCD	Red	On	Carrier signal detected
DCD	Red	Off	Carrier signal not detected
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Phone is ringing
LL	Red	On	Operating in lease-line mode
LL	Red	Off	Not operating in Lease-line mode
PWR	Red	On	Power is on
PWR	Red	Off	Power is off

JUMPER SELECTION
Function	JP6	JP7	JP8	JP9
Switched	Open	Not used	Not used	Closed
Lease Line - originating	Closed	Open	Closed	Open
Lease Line - answering	Closed	Closed	Closed	Open

AUTO FALL FORWARD/FALLBACK
Type:	Configuration
Format:	AT [cmds] %Gn [cmds]
Example:	AT %G1 &W <CR>
Description:	Selects auto fallback.
Command	Function
%G0	Fallback disabled.
» %G1	Fallback enabled.

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.

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, sets to normal mode and sends auto-reliable character to serial port.

AUTO SLEEP TIMER
Type:	Register
Format	AT [cmds] S46=n [cmds]
Example:	AT S46= 100<CR>
Default:	255
Range:	0 - 255
Unit:	.1 second
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Example:	AT \B3 &W<CR>
Range:	0 - 9
Unit:	100 ms
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		In normal or reliable mode, break from DTE	In direct mode, break from DTE	Break received from remote modem
\K0		Online command mode enabled, send no break to remote modem.	Send break immediately and enter command state.	Buffers cleared, break sent to remote modem.
\K1		Break sent to remote modem and buffered cleared.	Send break to remote modem immediately.	Buffers cleared, break sent to remote modem.
\K2		Online command mode enabled, send no break to remote modem.	Send break immediately and enter command state.	Break sent immediately to DTE.
\K3		Send break to remote modem immediately.	Send break to remote modem immediately.	Break sent immediately to DTE.
\K4		Online command mode enabled, send no break to remote modem.	Send break immediately and enter command state.	Break sent to remote modem when data received.
\K5		Send break with transmitted data.	Send break to remote modem immediately.	Break sent to remote modem when data received.

COMMAND SET
Type:	Configuration
Format:	AT [cmds] %Vn [cmds]
Example:	AT %V0 &W<CR>
Description:	Selects V.25bis or AT command sets.
Command	Function
» %V0	AT command set enabled.
%V1	V.25bis command set enabled.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT *EC0 %C3 *AP0<CR>
Description:	Contols data compression.
Command	Function
%C0	Data compression disabled.
%C1	MNP 5 enabled.
%C2	V.42bis enabled.
» %C3	MNP 5 and V.42bis enabled.

DATA COMPRESSION CONTROL
Type:	Configuration
Format:	AT [cmds] $Cn [cmds]
Example:	AT $C1 &W<CR>
Description:	Controls data compression.
Command	Function
$C0	Data compression disabled.
» $C1	MNP 5 and V.42bis enabled.

DIAL STORE NUMBER
Type:	Configuration
Format:	AT [cmds] DSn [cmds]
Example:	AT DS1 &W<CR>
Description:	Dial stored number
Note: n = 0 - 3, only three phone numbers can be in the nonvolatile memory.

DTE RATE STATUS
Type:	Register
Format:	AT [cmds] S62=n [cmds]
Example:	AT S62=16 <CR>
Description:	Selects DTE rate.
Command	Function
0	300bps.
1	600bps.
2	1200bps.
3	2400bps.
4	4800bps.
5	7200bps.
6	9600bps.
7	12Kbps.
8	14.4Kbps.
9	16.8Kbps.
10	19.2Kbps.
11	21.6Kbps.
12	24Kbps.
13	26.4Kbps.
14	28.8Kbps.
15	38.4Kbps.
» 16	57.6Kbps.
17	115.2Kbps.

DTE SPEED OPTION
Type:	Configuration
Format:	AT [cmds] \Jn [cmds]
Example:	AT \J0 &W<CR>
Description:	Controls the speed of the DTE.
Command	Function
» \J0	DCE and DTE rates are independent.
\J1	DTE rate adjusts to DCE rate after connection.

ERROR CORRECTION CONTROL
Type:	Configuration
Format:	AT [cmds] $En [cmds]
Example:	AT $E3 &W<CR>
Description:	Selects error correction mode.
Command	Function
$E0	Normal mode.
$E1	MNP auto-reliable mode.
$E2	MNP reliable mode.
» $E3	LAPM, MNP, or normal reliable mode.
$E4	LAPM mode reliable mode only.

FAX/DATA MODE
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Example:	AT S50=0 &W<CR>
Description:	Choose data or FAX mode.
Command	Function
» 0	Data mode enabled.
1	FAX mode 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:	Configuration
Format:	AT [cmds] $Fn [cmds]
Example:	AT $F4 A<CR>
Description:	Select flow control used by modem.
Command	Function
$F0	XON/XOFF software flow control enabled.
$F1	XON/XOFF pass-through flow control enabled.
$F4	Hardware CTS/RTS flow control enabled.
$F5	Flow control disabled.

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

IDENTIFICATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Example:	AT I3 &W<CR>
Description:	Displays several options.
Command	Function
I0	Display product - identification code.
I2	Display ROM checksum.
I3	Display firmware version.
I4	Display OEM string.
I5	Display country code.
I9	Display ROM checksum.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T20<CR>
Default:	Unidentified.
Range:	1-90
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.
Note:	\T0 will disable inactivity timer.

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	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.
\A4	Maximum MNP block size is 32 characters.

MODEM PROTOCOL
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 reliable mode enabled.
» \N3	MNP, LAP-M, or normal mode enabled.
\N4	LAP-M or MNP reliable enabled.
\N5	LAP-M reliable mode enabled.

POOR SIGNAL QUALITY REACTION
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Example:	AT %E0<CR>
Description:	Configures the modem’s reaction to poor signal quality.
Command	Function
%E0	Modem will disconnect during poor signal quality.
» %E1	Modem retrains during poor signal quality, disconnect if threshold set in S37 is exceeded.
%E2	Modem does nothing during poor signal quality.

PROTOCOL RESULT CODE
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Example:	AT \V0 Q0 <CR>
Description:	\V responds when conjunction with W0 and W2 commands.
Command	Function
\V1	Protocol result code disabled.
» \V0	Protocol result code enabled.

PROTOCOL/SPEED
Type:	Register
Format:	AT [cmds] S37n [cmds]
Example:	AT S37=0 <CR>
Description:	Selects the current DCE speed.
Command	Function
0	Select last AT speed.
3	Select 300bps speed.
5	Select 1200bps speed.
6	Select 2400bps speed.
7	Select 4800bps speed.
8	Select 7200bps speed.
9	Select 9600bps speed.
10	Select 12Kbps speed.
11	Select 14.4Kbps speed.
12	Select 16.8Kbps speed.
13	Select 19.2Kbps speed.
14	Select 21.6Kbps speed.
15	Select 24Kbps speed.
16	Select 26.4Kbps speed.
17	Select 28.8Kbps speed.

ROUND TRIP DELAY
Type:	Register
Format:	AT [cmds] S65=n [cmds]
Example:	AT S65=1 <CR>
Default:	Unidentified
Range:	Unidentified
Unit:	100 ms
Description:	Sets the round trip delay.

V.42 DETECTION PHASE
Type:	Configuration
Format:	AT [cmds] -Jn [cmds]
Example:	AT -J1 &W<CR>
Description:	Controls V.42 detection.
Command	Function
-J0	V.42 detection disabled.
» -J1	V.42 detection enabled.

V42bis COMPRESSION
Type:	Configuration
Format:	AT [cmds] "Hn [cmds]
Example:	AT "H3 &W<CR>
Description:	Controls V.42bis compression.
Command	Function
"H0	V.42bis disabled.
"H1	V.42bis while transmit enabled.
"H2	V.42bis while receiving enabled.
» "H3	V.42bis during transmitting and receiving enabled.

V.42bis DICTIONARY SIZE
Type:	Configuration
Format:	AT [cmds] "Nn [cmds]
Example:	AT "N2 &W<CR>
Description:	Controls V.42 dictionary size.
Command	Function
"N0	512 bytes.
"N1	1024 bytes.
» "N2	1536 bytes.

V.42bis MAXIMUM STRING LENGTH
Type:	Immediate
Format:	AT [cmds] "On [cmds]
Example:	AT "O32 <CR>
Default:	32
Range:	6 - 64
Unit:	Unidentified
Description:	Selects string size for V.42bis compression.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] \Xn [cmds]
Example:	AT \X0 <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.

COMMAND SET - AT
Type:	Immediate
Format:	CNL[cmds]
Example:	CNL%V0<CR>
Description:	Execute an AT command.

REQUEST LISTED NUMBERS
Type:	Immediate
Format:	RLN
Example:	RLN<CR>
Description:	Requests the modem to return the list of stored numbers. If no numbers are stored, the modem will return LSN.

STORED NUMBERS LIST
Type:	Result code
Format:	LSNxxxx
Example:	LSN 443-3388
Description:	Displays stored numbers. xxxx may specify a memory location, phone number, or status. If no code was specified with RLN, all stored numbers are displayed.