CONNECTIONS
Purpose	Location
Line in	CN1

INTERRUPT SELECTION
IRQ	JP1/A	JP1/B	JP1/C	JP1/D	JP1/E	JP1/F	JP1/G	JP1/H	JP1/I	JP1/J
í3	Closed	Open	Open	Open	Open	Open	Open	Open	Open	Open
4	Open	Closed	Open	Open	Open	Open	Open	Open	Open	Open
5	Open	Open	Closed	Open	Open	Open	Open	Open	Open	Open
7	Open	Open	Open	Closed	Open	Open	Open	Open	Open	Open
2 or 9	Open	Open	Open	Open	Closed	Open	Open	Open	Open	Open
10	Open	Open	Open	Open	Open	Closed	Open	Open	Open	Open
11	Open	Open	Open	Open	Open	Open	Closed	Open	Open	Open
12	Open	Open	Open	Open	Open	Open	Open	Closed	Open	Open
14	Open	Open	Open	Open	Open	Open	Open	Open	Closed	Open
16	Open	Open	Open	Open	Open	Open	Open	Open	Open	Closed

BASE I/O ADDRESS SELECTION
Address	SW1/1	SW1/2	SW1/3	SW1/4	SW1/5	SW1/6	SW1/7
100h	On	On	On	On	On	Off	On
108h	Off	On	On	On	On	Off	On
110h	On	Off	On	On	On	Off	On
118h	Off	Off	On	On	On	Off	On
120h	On	On	Off	On	On	Off	On
2E8h (COM4:)	Off	On	Off	Off	Off	On	Off
í 2F8h (COM2:)	Off	Off	Off	Off	Off	On	Off
3D8h	Off	Off	On	Off	Off	Off	Off
3E0h	On	On	Off	Off	Off	Off	Off
3E8h (COM3:)	Off	On	Off	Off	Off	Off	Off
3F0h	On	Off	Off	Off	Off	Off	Off
3F8h (COM1:)	Off	Off	Off	Off	Off	Off	Off
Note: A total of 127 memory base I/O address settings are available. The switches are a binary representation of the hexadecimal addresses. Switch SW1/1 is the Least Significant Bit and switch SW1/7 is the Most Significant Bit. The switches have the following decimal values: switch SW1/1=8, SW1/2=16, SW1/3=32, SW1/4=64, SW1/5=128, SW1/6=256, SW1/7=512.Turn off the switches and add the values of the off switches to obtain the correct base I/O address. (on=0, off=1)

FACTORY CONFIGURED - DO NOT ALTER
Switch	Position
SW1/8	On

AUTO-RELIABLE TIME BUFFER CONFIGURATION
Type:	Configuration
Format:	AT [cmds] $An [cmds]
Example:	AT $A1 &W<CR>
Description:	Controls the handling of incoming data during auto-reliable time period.
Command	Function
í$A0	Data is discarded.
$A1	Data is buffered.

BIT MODE
Type:	Configuration
Format:	AT [cmds] $EBn [cmds]
Example:	AT $EB1 E1<CR>
Description:	Selects 10- or 11-bit mode.
Command	Function
í $EB0	Sets 10-bit mode.
$EB1	Sets 11-bit mode.

CARRIER MODE
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Example:	AT &C0 A<CR>
Description:	Sets the function of the Carrier Detect (CD) signal.
Command	Function
&C0	Forces CD high.
í&C1	CD signal follows carrier.
&C2	Forces CD low for time in S24 when the modem disconnects.
&C4	Resets modem when CD goes low.

COMMAND ESCAPE TYPE
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Example:	AT %E3 &W<CR>
Description:	Sets type and response of command escape sequence.
Command	Function
%E0	Command escape disabled.
í%E1	TIES escape (+++AT...)
%E2	<BREAK>AT method.
%E3	Both TIES and BREAK methods.
%E4	OK response to command escape disabled.
%E5	OK response to command escape enabled.

COMMAND SET
Type:	Configuration
Format:	AT &Qn
Example:	AT &Q1<CR>
Description:	Selects standard Hayes or custom command sets.
Command	Function
í&Q0	Multi-Tech custom command set enabled.
&Q1	Standard Hayes command set enabled.

COMPRESSION
Type:	Configuration
Format:	AT &En
Example:	AT &E15 #L0<CR>
Description:	Selects data compression.
Command	Function
&E14	Data compression disabled.
í &E15	Data compression enabled.

COMPRESSION MODE
Type:	Configuration
Format:	AT #Ln
Example:	AT #L2 DT555-1212<CR>
Description:	Selects active compression protocols.
Command	Function
í#L0	V.42 negotiation enabled.
#L1	MNP negotiation enabled.
#L2	LAP-M negotiation enabled.
#L3	LAP-M enabled, no negotiation.

CTS SIGNAL
Type:	Configuration
Format:	AT [cmds] &RFn [cmds]
Example:	AT &RF0<CR>
Description:	Selects the function of the CTS signal.
Command	Function
&RF0	CTS is set to RTS.
í&RF1	CTS is independent of RTS.

DIAL STORED PHONE NUMBER
Type:	Immediate
Format:	AT [cmds] Nn1 [Nn2, Nn3...]
Example:	ATM0 N1N3N5<CR>
Description:	Dials stored phone number(s). If the first number is busy, the modem will proceed to the next number in the list.

DSR SIGNAL
Type:	Configuration
Format:	AT [cmds] &SFn [cmds]
Example:	AT &SF0<CR>
Description:	Selects the function of the DSR signal.
Command	Function
í&SF0	DSR is set to CD.
&SF1	DSR is independent of CD.

DTR TIMEOUT
Type:	Register
Format:	AT [cmds] S24=n [cmds]
Example:	ATS24=40<CR>
Default:	20
Range:	0-255
Unit:	50 ms
Description:	Sets the time to drop the DTR signal to hangup.

ERROR CORRECTION DISABLE ON CONNECT
Type:	Configuration
Format:	AT [cmds] $Fn [cmds]
Example:	AT $F1 DT555-1212<CR>
Description:	Selects whether error correction can be disabled by a <CR> while handshaking.
Command	Function
$F0	Error correction handshake interrupt disabled.
í$F1	Error correction handshake interrupt enabled.

ESCAPE SEQUENCE BUFFER SIZE
Type:	Register
Format:	AT [cmds] S34=n [cmds]
Example:	ATS34=30<CR>
Default:	10
Range:	0-60
Unit:	1 byte
Description:	Sets the size of the buffer used to store commands during an escape sequence.

ESCAPE SEQUENCE - OUT OF BAND
Type:	Immediate
Format:	<BREAK> AT [cmds]<CR>
Example:	<BREAK> AT #F1<CR>
Description:	Puts the modem in Command Mode.
Notes:	Do not precede this command with AT. <BREAK> refers to the hardware modem break signal.

ESCAPE SEQUENCE TIMEOUT
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Example:	ATS32=30<CR>
Default:	20
Range:	0-255
Unit:	1 second
Description:	Sets the maximum amount of time the modem will wait for a <CR> while executing an escape sequence.

FALLBACK MODE
Type:	Configuration
Format:	AT [cmds] #Fn [cmds]
Example:	AT #F1 O<CR>
Description:	Sets direction of fallback.
Command	Function
#F0	Fallback disabled.
#F1	Fallback from 19.2Kbps to 4800bps as line quality degrades.
í#F2	Fallback from 4800bps to 19.2Kbps as line quality improves.

FLOW CONTROL NORMAL MODE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E11 O<CR>
Description:	Selects normal flow control.
Command	Function
í&E10	Normal mode disabled.
&E11	Normal mode enabled.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E4 &W<CR>
Description:	Sets type of flow control used by modem.
Command	Function
&E3	Flow control disabled.
í&E4	CTS/RTS flow control enabled.
&E5	XON/XOFF flow control enabled.

HANDSHAKE ATTEMPTS
Type:	Configuration
Format:	AT [cmds] #An [cmds]
Example:	AT #A1 #L3<CR>
Description:	Configures the initial handshake phase.
Command	Function
#A0	Attempts in order: 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.
#A1	Attempts only 14.4Kbps.
#A2	Attempts in order: 28.8Kbps, 24Kbps, 21.6Kbps, 19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, 9600bps, 4800bps.
#A3	Attempts in order: 2400bps, 1200bps, 300bps.

HELP SCREENS
Type:	Immediate
Format:	AT $Hn
Example:	AT $H1<CR>
Description:	Shows modem help screens.
Command	Function
$H1	Shows help screen 1.
$H2	Shows help screen 2.
$H3	Shows help screen 3.

LIST CONFIGURATION
Type:	Immediate
Format:	AT Ln
Example:	AT L5<CR>
Description:	Lists modem configuration.
Command	Function
L5	Lists all settings.
L6	Lists the values of all S-registers.
L7	Lists extended parameters.
L8	Lists current diagnostics.

LOCAL SERIAL PORT SPEED
Type:	Configuration
Format:	AT [cmds] $SBnnn [cmds]
Example:	AT $MB9600 $SB19200<CR>
Description:	Sets serial port speed.
Command	Function
$SB300	Sets 300bps speed.
$SB1200	Sets 1200bps speed.
$SB2400	Sets 2400bps speed.
$SB4800	Sets 4800bps speed.
$SB9600	Sets 9600bps speed.
$SB19200	Sets 19.2Kbps speed.
$SB38400	Sets 38.4Kbps speed.
$SB57600	Sets 57.6Kbps speed.
$SB115200	Sets 115.2Kbps speed.

LOOPBACK
Type:	Configuration
Format:	AT [cmds] &Tn [cmds]
Example:	AT &T5<CR>
Description:	Enables or disables remote digital loopback response.
Command	Function
&T4	Loopback response enabled.
&T5	Loopback response disabled.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] &BSn [cmds]
Example:	AT &BS1 &MB28800<CR>
Description:	Sets the maximum transmittable block size.
Command	Function
&BS0	Maximum block size is 64 characters.
í&BS1	Maximum block size is 128 characters for LAP-M, and 256 characters for MNP.

PACING
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E13<CR>
Description:	Selects ENQ/ACK pacing.
Command	Function
&E12	Disables ENQ/ACK pacing.
í&E13	Enables ENQ/ACK pacing.

PACING - ENQ/ACK
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E9<CR>
Description:	Selects ENQ/ACK pacing.
Command	Function
í&E8	Enables ENQ/ACK pacing.
&E9	Disables ENQ/ACK pacing.

REDIAL
Type:	Immediate
Format:	ATA:
Example:	ATA:<CR>
Description:	Redials the last number dialed until it is no longer busy.

REMOTE CONNECT SPEED
Type:	Configuration
Format:	AT $MBnnn
Example:	AT $MB9600 $SB19200<CR>
Description:	Sets maximum remote connect speed.
Command	Function
$MB300	Sets 300bps connect.
$MB1200	Sets 1200bps connect.
$MB2400	Sets 2400bps connect.
$MB4800	Sets 4800bps connect.
$MB9600	Sets 9600bps connect.
$MB14400	Sets 14.4Kbps connect.
$MB19200	Sets 19.2Kbps connect.

RETRANSMIT FAIL ACTION
Type:	Configuration
Format:	AT [cmds] $Rn [cmds]
Example:	AT $R1<CR>
Description:	Sets whether the modem gives up on a bad connection.
Command	Function
í$R0	Hang up after 12 failed retransmissions.
$R1	Do not hang up after 12 failed retransmissions.

STORE PHONE NUMBER IN NVRAM
Type:	Configuration
Format:	AT [cmds] D<#>Nn [dialstring]
Example:	ATD555-1212N1<CR>
Description:	Stores a phone number in the modem’s memory.

TRELLIS MODULATION
Type:	Configuration
Format:	AT [cmds] #Tn [cmds]
Example:	AT #T1<CR>
Description:	Controls Trellis Coded Modulation.
Command	Function
#T0	Disables TCM.
í#T1	Enables TCM.

V.42 MODE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E0 <CR>
Description:	Configures the operation of V.42 mode.
Command	Function
&E0	Error correction disabled.
í&E1	V.42 set to auto-reliable.
&E2	V.42 set to reliable.

V.42 LOW SPEED
Type:	Configuration
Format:	AT [cmds] $En [cmds]
Example:	AT $E1 <CR>
Description:	Selects whether a V.42 connection will be attempted at 300bps.
Command	Function
í$E0	V.42 disabled at 300bps.
$E1	V.42 enabled at 300bps.

XOFF SEND
Type:	Configuration
Format:	AT [cmds] #Xn [cmds]
Example:	AT #X1<CR>
Description:	Selects how XOFF signal is sent.
Command	Function
í#X0	Single XOFF character sent until ready.
#X1	Multiple XOFF characters sent until ready.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Example:	AT &E7 O<CR>
Description:	Selects whether XON/XOFF signals are sent to remote modem.
Command	Function
í&E6	XON/XOFF signals trapped by local modem.
&E7	XON/XOFF passed through local modem.