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/SQ	Green	On	Error correction enabled
EC/SQ	Green	Off	Error correction disabled
EC/SQ	Green	Blinking, mostly on	Error correction activated and poor line signal errors detected
EC/SQ	Green	Blinking, mostly off	Error correction not activated and poor line signal errors detected
HS/RI	Green	On	Modem is operating at highest configured speed
HS/RI	Green	Off	Modem is operating at less than highest configured speed
HS/RI	Green	Blinking	Phone is ringing
CD	Green	On	Carrier signal detected
CD	Green	Off	Carrier signal not detected
OH/APL	Green	On	Modem is off-hook
OH/APL	Green	Off	Modem is on-hook
OH/APL	Green	Blinking	Modem set for leased line
RD	Green	On	Modem is receiving data
RD	Green	Off	Modem is not receiving data
SD	Green	On	Modem is transmitting data
SD	Green	Off	Modem is not transmitting data
TR	Green	On	DTR signal is high or modem is set to ignore signal
TR	Green	Off	DTR signal is low
MR/PWR	Green	Off	Power is off
MR/PWR	Green	On	Power is on
MR/PWR	Green	Blinking, slow	Download only mode
MR/PWR	Green	Blinking, fast	Cloning mode
MR/PWR	Green	Blinking	Power on in leased mode

AT COMMAND RESPONSE
Type:	Register
Format:	AT [cmds] S84=n [cmds]
Example:	AT S84=0 &W<CR>
Description:	Sets the response to AT commands.
Command	Function
í 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.
Command	Function
í S78=0	Auto baud enabled.
S78=1	Auto baud disabled.
S78=2	PBX operation.

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] %An [cmds]
Example:	AT%A20<CR>
Default:	19
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
í \CO	Data is discarded.
\C1	Data is buffered.
\C2	Data is discarded, resets to \C1 on receipt of autoreliable fallback character.

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.
í \K5	Send data, send break.
\K6	Disabled.

BUSY OUT ON LOW DTR
Type:	Register
Format:	AT [cmds] S69=n [cmds]
Example:	AT S69=0 &W<CR>
Description:	Modem goes off hook on low DTR (use only in PBX mode).
Command	Function
í S69=0	Busy out disabled.
S69=1	Busy out enabled.

CD SIGNAL
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Example:	AT &C3 <CR>
Description:	Configures the behavior of the carrier detect signal.
Command	Function
&C0	CD forced high.
í &C1	CD normal.
&C2	CD forced high except during handshaking and disconnecting.
&C3	CD momentary interrupt on disconnect.
&C4	CD follows remote RTS signal.
&C5	CD Follows DTR signal. Forced low on disconnect.
&C6	CD forced low on retrain of over 10 sec. Forced high after no retrain for over 10 sec.

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
í S91=0	Disabled
S91=1	Enabled

CLEAR ERROR BUFFER
Type:	Immediate
Format:	AT [cmds] "F [cmds]
Example:	AT "F &W<CR>
Description:	Empties error buffer.

COMPRESSION
Type:	Configuration
Format:	AT %Cn
Example:	AT I2 %C1 &B0<CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
í %C1	Data compression enabled.

CTS SIGNAL
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Example:	AT \D0<CR>
Description:	Selects the function of the CTS signal.
Command	Function
í \D0	CTS forced high.
\D1	CTS normal.
\D2	CTS interrupted for 2 seconds on disconnect.
\D3	CTS follows DTR.

DISCONNECT BUFFER DELAY
Type:	Register
Format:	AT [cmds] S39=n [cmds]
Example:	AT S39=0<CR>
Default:	Unidentified
Range:	0-255
Unit:	1 second
Description:	Selects how long the modem will continue to transmit data in receive buffer after receipt of disconnect signal

DISCONNECT BUFFER DELAY
Type:	Register
Format:	AT [cmds] S49=n [cmds]
Example:	AT S49=0<CR>
Default:	10
Range:	0-255
Unit:	1 second
Description:	Selects how long the modem will continue to transmit data in transmit buffer after receipt of disconnect signal

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
í S85=0	Disabled.
S85=1	Enabled.

DISCONNECT INACTIVITY
Type:	Register
Format:	AT [cmds] S80=n [cmds]
Example:	AT S80=3 &W<CR>
Description:	Sets the signal monitored by the inactivity timer (\T).
Command	Function
S80=0	Transmit or receive.
S80=1	Transmit only.
S80=2	Receive only.
í S80=3	Transmit and receive.

DISCONNECT ON LOSS OF CURRENT
Type:	Configuration
Format:	AT [cmds] S65=n [cmds]
Example:	AT S65=0<CR>
Description:	Causes the modem to disconnect if the telephone line’s current drops.
Command	Function
í S65=0	Disconnect after 8ms if current is lost.
S65=1	Disconnect after 90ms if current is lost.
S65=2	Disabled

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Example:	AT \G1 &K3<CR>
Description:	Selects modem port flow control.
Command	Function
í \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.
í \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
í \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 1=6 frames, 0=auto adjust)
Description:	Sets the number of frames used in V.42 and V.42bis transmissions

LEASED LINE AUTO-RETRAIN
Type:	Register
Format:	AT [cmds] S82=n [cmds]
Example:	AT S82=0 &W<CR>
Description:	Allows modem to retrain to compensate for bad line quality in V.32bis, V.32terbo or V.34 mode
Command	Function
í S82=0	Retrain enabled.
S82=1	Retrain disabled.

LEASED LINE DISCONNECT LEVEL
Type:	Register
Format:	AT [cmds] S48=n [cmds]
Example:	AT S48=0 &W<CR>
Description:	Sets level carrier signal drops to before disconnect.
Command	Function
í S48=0	Disconnect at -43dBm
S48=1	Disconnect at -26dBm

LEASED LINE SPEED
Type:	Register
Format:	AT [cmds] S44=n [cmds]
Example:	ATS44=6<CR>
Default:	27
Description:	Sets maximum leased line speed
Command	Function
S44=1	14.4Kbps V.32bis
S44=2	12.0Kbps V.32bis
S44=3	9600bps V.32bis, V.32
S44=4	7200bps V.32bis
S44=5	4800bps V.32bis, V.32
S44=6	2400bps V.22bis
S44=18	19.2Kbps V.32terbo
S44=19	16.8Kbps V.32terbo
S44=25	33.6Kbps AT&T V.34
S44=26	31.2Kbps AT&T V.34
í S44=27	28.8Kbps V.34
S44=28	26.4Kbps V.34
S44=29	24.0Kbps V.34
S44=30	21.6Kbps V.34
S44=31	19.2Kbps V.34
S44=32	16.8Kbps V.34
S44=33	14.4Kbps V.34
S44=34	12.0Kbps V.34
S44=35	9600bps V.34
S44=36	7200bps V.34
S44=37	4800bps V.34
S44=38	2400bps V.34

LEASED LINE TRANSMISSION LEVEL
Type:	Register
Format:	AT [cmds] S45=n [cmds]
Example:	AT S45=15<CR>
Default:	0
Range:	0 - 15
Unit:	1 dBm
Description:	Sets the signal level for transmission when in leased line mode.

LINE TYPE
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Example:	AT &L0 H1 DT555-1212<CR>
Description:	Selects line type.
Command	Function
í &L0	Switched line.
&L1	2-wire originate mode leased line.
&L2	2-wire answer mode leased line.

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
í S90=0	Disabled.
S90=1	Serial speed follows connect speed.

NETWORK POSITION IDENTIFICATION
Type:	Register
Format:	AT [cmds] S74=n [cmds]
Example:	AT S74=0 &W<CR>
Description:	Identifies modem as either tributary or control
Command	Function
í S74=0	Identify as tributary
íS74=1	Identify as control

PASSWORD REMOTE ACCESS
Type:	Register
Format:	AT [cmds] S56=n [cmds]
Example:	ATS56=6<CR>
Default:	None
Range:	00-99
Unit:	Password digits
Description:	Allows entry of the first two digits of remote access password.

PASSWORD REMOTE ACCESS
Type:	Register
Format:	AT [cmds] S57=n [cmds]
Example:	ATS57=6<CR>
Default:	None
Range:	00-99
Unit:	Password digits
Description:	Allows entry of the second two digits of remote access password.

PASSWORD REMOTE ACCESS
Type:	Register
Format:	AT [cmds] S58=n [cmds]
Example:	ATS58=6<CR>
Default:	None
Range:	00-99
Unit:	Password digits
Description:	Allows entry of the third two digits of remote access password.

PASSWORD REMOTE ACCESS
Type:	Register
Format:	AT [cmds] S59=n [cmds]
Example:	ATS59=6<CR>
Default:	None
Range:	00-99
Unit:	Password digits
Description:	Allows entry of the fourth two digits of remote access password.

PROTOCOL/SPEED
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.34 at 2400bps speed.
%B4800	Select V.34 at 4800bps speed.
%B7200	Select V.34 at 7200bps speed.
%B9600	Select V.34 at 9600bps uncoded speed.
%B12000	Select V.34 at 12Kbps speed.
%B14400	Select V.34 at 14.4Kbps speed.
%B16800	Select V.34 at 16.8Kbps speed.
%B19200	Select V.34 at 19.2Kbps speed.
%B21600	Select V.34 at 21.6Kbps speed.
%B24000	Select V.34 at 24Kbps speed.
%B26400	Select V.34 at 26.4Kbps speed.
í %B28800	Select V.34 at 28.8Kbps speed.
%BL31200	Select V.34 proprietary at 31.2Kbps speed.
%BL33600	Select V.34 proprietary at 33.6Kbps speed.
%BL2400	Select V.22bis at 2400Kbps speed.
%BL4800	Select V.32bis/V.32 at 4800Kbps speed.
%BL7200	Select V.32bis at 7200Kbps speed.
%BL9600	Select V.32bis/V.32 at 9600Kbps speed.
%BL12000	Select V.32bis at 12Kbps speed.
%BL14400	Select V.32bis at 14.4Kbps speed.
%BL16800	Select V.32terbo at 16.8Kbps speed.
%BL19200	Select V.32terbo at 19.2Kbps speed.

REMOTE CLONE
Type:	Configuration
Format:	AT [cmds] &&P1 [cmds]
Example:	AT &&P1 &W<CR>
Description:	In online command mode, copies firmware to remote 3825Plus modem

REMOTE CONFIGURATION
Type:	Configuration
Format:	AT [cmds] S55=n [cmds]
Example:	AT S55=0 &W<CR>
Description:	Allows remote configuration by 3800 series modem.
Command	Function
í S55=0	Remote configuration enabled.
S55=1	Remote configuration disabled.

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 firmware 3 digit version number.
I2	Performs EPROM check
I3	Reports serial number
I4	Reports model number
I5	Reports hardware part number
I6	Reports software part number
I9	Reports firmware 3 digit version number.
I11	Reports RAM checksum result.
I17	Reports last eight critical errors from last to first
I19	Reports complete firmware revision number

RJ11 CELLULAR ADAPT
Type:	Register
Format:	AT [cmds] S93=n [cmds]
Example:	AT S93=0 &W<CR>
Description:	Adds support for RJ11 connection during cellular operation
Command	Function
í S93=0	Disabled.
S93=1	Enabled.

SECURITY CHANGE ADMINISTRATION PASSWORD
Type:	Configuration
Format:	AT [cmds] %SA=nnnnnnnn [cmds]
Example:	AT %SA=22233344 &W<CR>
Description:	Changes administration password.

SECURITY CHANGE DTE PASSWORD
Type:	Configuration
Format:	AT [cmds] %SBi=nnnnnnnn [cmds]
Example:	AT %SBi=22233344 &W<CR>
Description:	Changes the DTE type password in index i.

SECURITY CHANGE VF PLUS DTE PASSWORD
Type:	Configuration
Format:	AT [cmds] %SBi=nnnnnnnn [cmds]
Example:	AT %SBi=22233344 &W<CR>
Description:	Changes the VF plus DTE type password in index i.

SECURITY CHANGE VF PASSWORD
Type:	Configuration
Format:	AT [cmds] %SVi=nnnnnnnn [cmds]
Example:	AT %SVi=22233344 &W<CR>
Description:	Changes the VF type password in index i.

SECURITY DISPLAY PASSWORD
Type:	Immediate
Format:	AT [cmds] %SPi [cmds]
Example:	AT %SPi &W<CR>
Description:	Displays the VF or DTE type password in index i.

SECURITY DELETE PASSWORD
Type:	Configuration
Format:	AT [cmds] %SPi= [cmds]
Example:	AT %SPi= &W<CR>
Description:	Delete the VF or DTE type password in index i.

SECURITY ENTER ADMINISTRATION PASSWORD
Type:	Configuration
Format:	AT [cmds] %SAnnnnnnnn [cmds]
Example:	AT %SA22233344 &W<CR>
Description:	Sets modem to allow security configuration and password changes.

SECURITY RESET
Type:	Configuration
Format:	AT [cmds] %SR [cmds]
Example:	AT %SR &W<CR>
Description:	Resets administration password and empties password table

STORED PROFILE
Type:	Register
Format:	AT [cmds] S88=n [cmds]
Example:	AT S88=0 &W<CR>
Description:	Loads stored profile on disconnect.
Command	Function
í S88=0	Disabled.
S88=231	Disabled.
S88=1	Enabled.
S88=232	Enabled.

SWITCHED LINE SPEED
Type:	Register
Format:	AT [cmds] S41=n [cmds]
Example:	ATS41=6<CR>
Default:	20
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=20	19.2Kbps V.32terbo
S41=21	16.8Kbps V.32terbo
S41=27	33.6Kbps AT&T V.34
S41=28	31.2Kbps AT&T V.34
í S41=29	28.8Kbps V.34
S41=30	26.4Kbps V.34
S41=31	24.0Kbps V.34
S41=32	21.6Kbps V.34
S41=33	19.2Kbps V.34
S41=34	16.8Kbps V.34
S41=35	14.4Kbps V.34
S41=36	12.0Kbps V.34
S41=37	9600bps V.34
S41=38	7200bps V.34
S41=39	4800bps V.34
S41=40	2400bps V.34

TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Example:	AT &I26 &W<CR>
Default:	Unidentified
Range:	0-32, 99, 100
Unit:	-1 dBm
Description:	Sets the signal level for transmission
Note: 0-8 invalid in North America. Set to 99 for autoadjust ETC1.0 specification. Set to 100 for autoadjust ETC1.1 specification

TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] &J0 [cmds]
Example:	AT &J0 &W<CR>
Description:	Sets -9 dBm permissive mode

V.25bis CODE SET
Type:	Configuration
Format:	AT [cmds] S62=n [cmds]
Example:	AT S62=0 &W<CR>
Description:	Sets coding type used in V.25bis mode.
Command	Function
í S62=0	ASCII
S62=1	EBCDIC

V.25bis IDLE CHARACTER
Type:	Configuration
Format:	AT [cmds] S63=n [cmds]
Example:	AT S63=0 &W<CR>
Description:	Sets V.25 idle fill type
Command	Function
í S63=0	Fill character is mark.
S63=1	Fill character is flag.

V.25bis NEW LINE CHARACTER
Type:	Configuration
Format:	AT [cmds] S64=n [cmds]
Example:	AT S64=0 &W<CR>
Description:	Sets V.25 new line character.
Command	Function
í S64=0	Carriage return and line feed.
S64=1	Carriage return.
S64=2	Line feed.

V.32bis AUTO-RETRAIN
Type:	Register
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
í S76=0	Auto retrain enabled.
S76=1	Auto retrain disabled.
S76=2	Auto retrain started at 4800bps for V.32bis operation.
S76=3	Auto retrain started at 9600bps for V.32bis operation.

V.32bis TRAIN
Type:	Register
Format:	AT [cmds] S43=n [cmds]
Example:	AT S43=0 &W<CR>
Description:	Sets train length for V.34, V.32terbo, V.32bis and V32.
Command	Function
í S43=0	Long
S43=1	Short

V.34 SPLIT BAUD MODE
Type:	Configuration
Format:	AT [cmds] S14=n [cmds]
Example:	AT S14=0 <CR>
Description:	Controls V.34 split baud mode.
Command	Function
í S14=0	V.34 split baud mode enabled.
S14=1	V.34 split baud mode disabled.

V.42bis COMPRESSION CONTROL
Type:	Configuration
Format:	AT [cmds] "Hn [cmds]
Example:	AT "H3 &W<CR>
Description:	Controls V.42bis data compression
Command	Function
"H0	V.42bis disabled.
"H1	V.42bis when transmitting enabled.
"H2	V.42bis when receiving enabled.
í "H3	V.42bis when transmitting/receiving enabled.

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
í \X0	XON/XOFF signals trapped by local modem.
\X1	XON/XOFF passed through local modem.

DTR ALARM
Type:	Register
Format:	AT [cmds] S77=n [cmds]
Example:	AT S77=0 &W<CR>
Description:	Sends alarm to proprietary Series Management Controller if DTR low for 10 seconds.
Command	Function
í S77=0	Alarm disabled.
S77=1	Alarm enabled.

CALLBACK SECURITY
Type:	Register
Format:	AT [cmds] S67=n [cmds]
Example:	AT S67=0 &W<CR>
Description:	Enables callback security option
Command	Function
í S67=0	Disabled
S67=1	Enabled

ANSWER SECURITY
Type:	Register
Format:	AT [cmds] S68=n [cmds]
Example:	AT S68=0 &W<CR>
Description:	Selects what type of answer security is used.
Command	Function
S68=0	Answer security disabled
S68=1	DTE answer security enabled.
S68=2	VF and DTE answer security enabled
S68=3	VF with DTE answer security enabled

ORIGINATE SECURITY
Type:	Register
Format:	AT [cmds] S70=n [cmds]
Example:	AT S70=0 &W<CR>
Description:	Enables originate security option
Command	Function
í S70=0	Originate security disabled
S70=1	Originate security enabled

VF PROMPT TYPE
Type:	Register
Format:	AT [cmds] S95=n [cmds]
Example:	AT S95=0 &W<CR>
Description:	Selects the type of VF password prompt sent to remote dialer.
Command	Function
í S95=0	Second dial tone
S95=1	Quiet answer
Note: Also selects which dial modifier (@ or W) must precede password

PASSWORD ATTTEMPT LIMIT
Type:	Register
Format:	AT [cmds] S96=n [cmds]
Example:	AT S96=0 &W<CR>
Description:	Sets number of DTE password attempts before disconnect.
Command	Function
í S96=0	1 attempt
S96=1	2 attempts
S96=2	3 attempts
S96=3	4 attempts
S96=4	5 attempts

PASSWORD DTE TERMINATION CHARACTER
Type:	Register
Format:	AT [cmds] S97=n [cmds]
Example:	ATS97=13<CR>
Default:	13
Range:	1-127
Unit:	ASCII
Description:	Sets Character used to indicate end of password or callback directory/number

PASSWORD BACKSPACE CHARACTER
Type:	Register
Format:	AT [cmds] S98=n [cmds]
Example:	ATS98=8<CR>
Default:	8
Range:	0-127
Unit:	ASCII
Description:	Sets Character used backspace when entering password or callback directory/number