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
PWR	Green	On	Power is on
PWR	Green	Off	Power is off
ALRM	Red	Blinking	Internal malfunction detected
ALRM	Red	Off	Normal operation
OH	Green	On	Modem is off-hook
OH	Green	Off	Modem is on-hook
DTR/108	Green	On	DTR signal is high
DTR/108	Green	Off	DTR signal is low
RTS/105	Green	On	RTS signal is high
RTS/105	Green	Off	RTS signal is low
CTS/106	Green	On	CTS signal is high
CTS/106	Green	Off	CTS signal is low
TXD/103	Green	On	Modem is transmitting data
TXD/103	Green	Off	Modem is not transmitting data
LSD/109	Green	On	Carrier signal detected
LSD/109	Green	Off	Carrier signal not detected
RXD/104	Green	On	Modem is receiving data
RXD/104	Green	Off	Modem is not receiving data
SQ	Yellow	On	Incoming signal is degraded
SQ	Yellow	Off	Normal operation
EC	Green	On	Error correction enabled
EC	Green	Off	Error correction disabled
RATE	Yellow	On	Modem is connected at less than configured speed
RATE	Yellow	Off	Modem is connected at configured speed
AT	Yellow	On	AT command set disabled
AT	Yellow	Off	AT command set enabled
AT	Yellow	Blinking	AT command set partially enabled (see S84)

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 REDIAL
Type:	Register
Format:	AT [cmds] S37=n [cmds]
Example:	ATS37=6<CR>
Default:	Unidentified.
Unit:	1 stored number.
Description:	Redial from a list of stored numbers
Command	Function
S36=0	Dial stored number 1
S36=1	Dial stored numbers 1-2.
S36=2	Dial stored numbers 1-3.
S36=3	Dial stored numbers 1-4.
S36=4	Dial stored numbers 1-5.
S36=5	Dial stored numbers 1-6
S36=6	Dial stored numbers 1-7.
S36=7	Dial stored numbers 1-8.
S36=8	Dial stored numbers 1-9.
S36=9	Dial stored numbers 1-10.

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Configuration
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.
Command	Function
í S69=0	Busy out disabled.
S699=1	Busy out enabled.

CALLBACK STORED NUMBER
Type:	Register
Format:	AT [cmds] S67=n [cmds]
Example:	AT S67=0<CR>
Description:	Callback function will dial the number stored in memory location 1.
Command	Function
í S67=0	Disabled.
S67=1	Enabled.

CELLULAR ENHANCEMENT
Type:	Register
Format:	AT [cmds] S91=n [cmds]
Example:	AT S91=0 &W<CR>
Description:	Adjusts profile to improve cellular performance
Command	Function
í S91=0	Disabled.
S91=1	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 disconect.
&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.

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Example:	AT &B1 %C1 &I<CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
í %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	V.42/MNP mode only enabled.
í \N5	V.42/MNP mode with fallback to normal mode 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.

DIAL TYPE SELECTION
Type:	Configuration
Format:	AT [cmds] &Jn [cmds]
Example:	AT &J0 D555-1212<CR>
Description:	Sets transmit signal level.
Command	Function
í &J0	Permissive -9dBm
&J1	Programmable

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:	Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers.

DISCONNECT IMMEDIATELY
Type:	Register
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:	Register
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

DTE RATE CONTROL
Type:	Register
Format:	AT [cmds] S61=n [cmds]
Example:	AT S61= &W<CR>
Description:	Sets result of DTE CT111 rate control signal.
Command	Function
í S61=0	Disabled.
S61=-1	Fallback 1.
S61=2	Fallback 2.

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.

FACTORY DEFAULTS
Type:	Immediate/Configuration
Format:	AT &Fn
Example:	AT &F0<CR>
Description:	Loads factory defaults to NVRAM.
Command	Function
&F0	Asynchronous dial.
&F3	UNIX dial.
&F5	Cellular (Mobile). Load \A4, \N4, S0=3, S7=120, S10=100, S43=1, S76=3, S89=9, S91=1.
&F6	Cellular (PSTN). Load &I100, \N4, S7=120, S10=100, S43=1, S89=9, S91=1

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.
í \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.

HANDSHAKE OPTIONS
Type:	Register
Format:	AT [cmds] S43=n [cmds]
Example:	AT S43=0 <CR>
Default:	0
Range:	0, 1
Description:	Controls the V.32bis handshake sequence.
Command	Function
í S43=0	V.32bis long handshake.
S43=1	V.32is short handshake.

INACTIVITY TIMER
Type:	Configuration
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 SIZE4
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

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.
Command	Function
í S82=0	Retrain enabled.
S82=1	Retrain disabled.

LEASED LINE SPEED
Type:	Register
Format:	AT [cmds] S44=n [cmds]
Example:	ATS44=6<CR>
Default:	18
Description:	Sets maximum leased line speed
Command	Function
S44=0	14.4Kbps V.32bis
S44=1	14.4Kbps V.32bis
S44=2	12.0Kbps V.32bis
S44=3	9600bps V.32bis
S44=4	7200bps V.32bis
S44=5	4800bps V.32bis
S44=6	2400bps V.22bis
í S44=18	19.2Kbps V.32terbo
S44=19	16.8bps V.32terbo

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 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=12	1200/75bps V.23
S41=13	75/1200bps V.23
í S41=20	19.2Kbps V.32terbo
S41=21	16.8bps V.32terbo

LOCAL ANALOG LOOPBACK
Type:	Register
Format:	AT [cmds] S52=n [cmds]
Example:	AT S52=0 &W<CR>
Description:	Modem executes local analog loopback on receipt of CT141 signal from DTE
Command	Function
í S52=0	Loopback disabled.
S52=1	Loopback enabled.

LOCK SERIAL PORT
Type:	Register
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.

MI/MIC
Type:	Register
Format:	AT [cmds] S83=n [cmds]
Example:	AT S83=0 &W<CR>
Description:	Configures the Mode Indicate/Mode Indicate Common (MI/MIC) interface.
Command	Function
í S83=0	Disabled.
S83=1	Enabled.

REMOTE CONFIGURATION
Type:	Register
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.

REMOTE DIGITAL LOOPBACK
Type:	Register
Format:	AT [cmds] S51=n [cmds]
Example:	AT S51=0 &W<CR>
Description:	Modem executes remote digital loopback on receipt of CT140 signal from DTE
Command	Function
í S51=0	Loopback disabled.
S51=1	Loopback enabled.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Example:	AT &C1 I1 B1<CR>
Description:	Displays modem properties.
Command	Function
I0	Display product code.
I1	Display 3 digit firmware revision number.
I2	Reports current EPROM checksum.
I3	Display serial number.
I4	Display model number.
I5	Display hardware part number.
I6	Display software part number.
I9	Display 3 digit firmware revision number.
I10	Changes value displayed by I0
í I10=0	Display 144
I10=1	Display 240
I10=2	Display 480
I10=3	Display 960
I10=4	Display 120
I11	Reports RAM checksum result.
!19	Display complete firmware revision number.

RESET MODEM TO STORED PROFILE
Type:	Configuration
Format:	AT [cmds] Zn [cmds]
Example:	AT Z0<CR>
Description:	Restores modem profiles previously saved in non-volatile RAM using the &W command.
Command	Function
Z0	Restore profile 0.
Z1	Restore profile 1.
Z2	Restore profile 2.
Z3	Restore profile 3.
Z9	Restore factory defaults and use them as power-on defaults.

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Xn [cmds]
Example:	AT X5 &W<CR>
Description:	Enables extended result codes, EC and V.42, MNP suffix, dial tone and busy signal detect
Command	Function
X0	Disabled.
X1	Enable extended result codes.
X2	Enable extended result codes and dial tone detect.
X3	Enable extended result codes and busy signal detect
í X4	Enable extended result codes, dial tone detect and busy signal detect
X5	Enable extended result codes, EC suffix, dial tone detect and busy signal detect
X6	Enable extended result codes, V.42, MNP suffix, dial tone detect and busy signal detect
X7	Display DTE rate. Enable dial tone detect and busy signal detect

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

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.

TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Example:	AT &I26 &W<CR>
Default:	0
Range:	10-32, 99, 100
Unit:	-1 dBm
Description:	Sets the signal level for transmission
Note: Set to 99 for autoadjust ETC1.0 specification. Set to 100 for autoadjust ETC1.1 specification

V.25bis CODE SET
Type:	Register
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 NEW LINE CHARACTER
Type:	Register
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.
S76=3	Auto retrain started at 9600bps

V.32bis/PBX AUTOMODE
Type:	Register
Format:	AT [cmds] S78=n [cmds]
Example:	AT S78=0 &W<CR>
Description:	Selects allowed modulations.
Command	Function
í S78=0	Use any supported modulation.
S78=1	Use modulation specified in S41
S78=2	Use PBX modulation.

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.