CONNECTIONS
Purpose	Location	Purpose	Location
Line in	CN1	DC power	CN4
Line out	CN2	Power switch	SW2
RS-232/422	CN3

DTR SIGNAL
Setting	SW1/1
» On	DTR forced high
Off	DTR normal

RESULT CODES
Setting	SW1/2
» Off	Verbal result codes enabled
On	Numeric result codes enabled

RESULT CODES DISPLAY
Setting	SW1/3
» On	Display disabled
Off	Display enabled

ECHO COMMANDS DISPLAY
Setting	SW1/4
» Off	Local echo enabled
On	Local echo disabled

AUTO ANSWER
Setting	SW1/5
» On	Modem does not answer on first ring
Off	Modem answers on first ring

CARRIER DETECT
Setting	SW1/6
» Off	CD normal
On	CD forced high

MULTILINE PHONE INSTALLATION
Setting	SW1/7
» Off	Single phone connected
On	Multiple phones connected

AT COMMAND SET
Setting	SW1/8
» On	AT command set recognized
Off	AT command set disabled

ESCAPE CODE
Setting	SW1/9
» On	Go to command mode and display OK result code when escape character is received
Off	Disconnect, go to command mode and display NO CARRIER when escape character is received

USER PROFILE
Setting	SW1/10
» Off	Use stored profile
On	Use factory default

TX/RX PIN ASSIGNMENT
Setting	SW3
» Off	Normal operation
On	Reverse TX/RX pin assignments

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
HS	Red	On	Modem is operating at 9600bps
HS	Red	Off	Modem is operating at slower than 9600bps
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
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	Blinking	Modem is receiving data
RD	Red	Off	Modem is not receiving data
TD	Red	Blinking	Modem is transmitting data
TD	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
MR	Red	Blinking	Modem is retraining or in test mode.
RS	Red	On	RTS signal is high
RS	Red	Off	RTS signal is low
CS	Red	On	CTS signal is high
CS	Red	Off	CTS signal is low
EC	Red	On	Error correction enabled
EC	Red	Off	Error correction disabled
EC	Red	Blinking	Modem is retransmitting data
AL	Red	On	Analog loopback self test mode enabled.
AL	Red	Off	Normal operation

BIT-MAPPED REGISTER S13
Format		AT [cmds] S13=n [cmds]
Example:		ATS13=139<CR>
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls DTR reset, DTR dialing, reset dialing, and MNP3.
Bit	Value		Function
0	» 0 1		DTR normal. Reset on low DTR.
1	» 0 1		Normal auto answer operation. When ring is received, enter originate and listen for answer tone.
2	» 0 1		Pause 250ms before displaying result codes. Immediate result code display.
3	» 0 1		DTR dialing disabled. DTR dialing enabled.
4	» 0 1		Reset dialing disabled. Reset dialing enabled.
5	» 0		Not used.
6	» 0 1		MNP 3 enabled. MNP 3 disabled.
7	» 0 1		Hardware reset disabled. Hardware reset enabled.

BIT-MAPPED REGISTER S15
Format:		AT [cmds] S15=n [cmds]
Example:		ATS15=139<CR>
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls HST high frequency equalization, online fallback, back channel, non-error-correcting mode buffer, MNP4, BS/DEL switch, and MNP compliance.
Bit	Value		Function
0	» 0 1		HST high frequency equalization enabled. HST high frequency equalization disabled.
1	» 0 1		Online fallback enabled. Online fallback disabled.
2	» 0 1		450bps back channel enabled. 450bps back channel disabled.
3	» 0 1		Non-error-correcting mode transmit buffer set to 1.5KB. Non-error-correcting mode transmit buffer set to 128 bytes.
4	» 0 1		MNP 4 enabled. MNP 4 disabled.
5	» 0 1		Use backspace key for delete disabled. Use backspace key for delete enabled.
6	» 0 1		MNP normal. MNP adjusted for non compliant modems.
7	» 0 1		Proprietary network compatibility disabled. Proprietary network compatibility enabled.

BREAK LENGTH
Type:	Register
Format:	AT [cmds] S21=n [cmds]
Example:	ATS21=20<CR>
Default:	10
Range:	Unidentified
Unit:	10 ms
Description:	Sets the length of Error correction mode breaks sent from DCE to DTE.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] &Yn [cmds]
Example:	AT &Y0<CR>
Description:	Configures action of break signal.
Command	Function
&Y0	Break empties buffer.
» &Y1	Break empties buffer and is sent immediately.
&Y2	Break does not empty buffer and is sent immediately.
&Y3	Break does not empty buffer and is sent with transmitted data.

CONNECTION SPEED UPPER LIMIT
Type:	Configuration
Format:	AT [cmds] &Nn [cmds]
Example:	AT &N1 DT555-1212<CR>
Description:	Sets required connection speed if &U is set to 0. Otherwise, sets fastest allowed connection speed.
Command	Function
» &N0	Variable.
&N1	300bps
&N2	1200bps
&N3	2400bps
&N4	4800bps
&N5	7200bps
&N6	9600bps

DISCONNECT DISPLAY
Type:	Immediate
Format:	AT [cmds] S17? [cmds]
Example:	ATS17?<CR>
Default:	Read only
Range:	1-6, 254, 255
Description:	Displays the reason for a disconnect during error correcting mode.
Value	Meaning
S17=1	Received data different than requested.
S17=2	Incompatible MNP protocol.
S17=3	Connection request parameters unknown.
S17=4	Remote modem retry timeout.
S17=5	Inactivity timeout.
S17=6	Destination user not found.
S17=254	Peer protocol error.
S17=255	User initiated disconnect.

ERROR CORRECTION MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Example:	AT &M1 %C1<CR>
Description:	Selects active error correction protocols.
Command	Function
&M0	Normal mode only.
» &M4	Auto-detect mode.
&M5	ARQ mode only.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] &An [cmds]
Example:	AT &A1 %C1<CR>
Description:	Selects extended result codes.
Command	Function
&A0	Extended result codes disabled.
» &A1	ARQ result codes enabled.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S23=n [cmds]
Example:	ATS23=20<CR>
Default:	19
Range:	11-127
Unit:	ASCII
Description:	Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S22=n [cmds]
Example:	ATS22=20<CR>
Default:	17
Range:	11-127
Unit:	ASCII
Description:	Sets the character used to represent XON.

FLOW CONTROL PASSTHROUGH
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Example:	AT &I0 &W<CR>
Description:	Allows modem to act on, then transmit XON/XOFF characters.
Command	Function
» &I0	Software flow control disabled.
&I1	XON/XOFF passthrough enabled.
&I2	XON/XOFF passthrough disabled.
&I3	Hewlett-Packard host mode.
&I4	Hewlett-Packard Terminal mode.
&I5	XON/XOFF passthrough for non error correction mode enabled.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &Hn [cmds]
Example:	AT &H0 A<CR>
Description:	Sets type of flow control used by modem.
Command	Function
» &H0	Flow control disabled.
&H1	CTS/RTS flow control enabled.
&H2	XON/XOFF flow control enabled.
&H3	CTS/RTS and XON/XOFF flow control enabled.

PAUSE
Type:	Configuration
Format:	AT [cmds] / [cmds]
Example:	AT /// &W<CR>
Description:	125ms pause for each /.

HELP SCREENS
Type:	Immediate
Format:	AT <prefix>$
Example:	AT &$<CR>
Description:	Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.
Command	Function
$	Shows ATx help screen.
&$	Shows AT& help screen.
D$	Shows ATDx help screen.
S$	Shows S-register help screen.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S19=n [cmds]
Example:	ATS19=20<CR>
Default:	0
Range:	Unidentified
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.

NO CARRIER DISPLAY
Type:	Immediate
Format:	AT [cmds] S20? [cmds]
Example:	ATS20?<CR>
Default:	Read only
Range:	0-7
Description:	Displays the reason for a NO CARRIER result code..
Value	Meaning
S20=0	Key press abort.
S20=1	DTR low.
S20=2	Escape code sent.
S20=3	Connection broken.
S20=4	Inactivity timeout.
S20=5	Automatic hangup with error correction incompatibility .
S20=6	Error correction retry timeout.
S20=7	Error correction received disconnect.

REGISTER S18

Note: This register is reserved and should not be changed.

REPEAT COMMAND STRING
Type:	Configuration
Format:	AT [cmds] > [cmds]
Example:	AT *D1 > #E1<CR>
Description:	Causes modem to repeat command string until a keyboard key is pressed.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Example:	AT I1 O<CR>
Description:	Displays modem properties.
Command	Function
I0	Reports product code.
I1	Reports ROM checksum result.
I2	Reports RAM checksum result.
I3	Reports call duration.
I4	Reports current command settings.
I5	Reports current NVRAM settings.
I6	Reports current connection’s statistics.
I7	Reports configuration.

TEST MODES
Type:	Register
Format:	AT [cmds] S16=n [cmds]
Example:	ATS16=0<CR>
Description:	Controls analog loopback pattern and dial tests
Command	Function
» S16=0	Testing disabled.
S16=1	Analog loopback test enabled.
S16=2	Dial test enabled.
S16=4	Test pattern enabled.
S16=5	Analog loopback with test pattern enabled.

TIME DISPLAY
Type:	Immediate
Format:	AT [cmds] Kn [cmds]
Example:	AT K1 *L2 #E1<CR>
Description:	Displays the current call time or clock time.
Command	Function
» K0	Display length of last call.
K1	Display actual time.