Card Type	Modem (asynchronous)
Chipset	Multi-Tech Systems, Inc.
Maximum Data Rate	14.4Kbps
Maximum Fax Rate	14.4Kbps
Data Modulation	Bell 103A, 113, 212A ITU-T V.21 (MT1432MUI only), V.22, V.22bis, V.23, V.32, V.32bis
Fax Modulation	ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Fax Class	Class II
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
9V DC power in	CN1	Telephone line out	CN3
Serial port	CN2

POWER MODE
Setting	SW1
Standby, wait for incoming call	Position 1
Off	Position 2
On	Position 3

DIAGNOSTIC LED(S)
LED		Color		Status			Condition
TD		Red		On			Modem is transmitting data
TD		Red		Off			Modem is not transmitting data
RD		Red		On			Modem is receiving data
RD		Red		Off			Modem is not receiving data
CD		Red		On			Carrier signal detected
CD		Red		Off			Carrier signal not detected
14 Status	Color		96 Status		Color	Condition
On	Red		On		Red	Modem connected at 12Kbps in V.32bis
Off	Red		On		Red	Modem connected at 9600bps
On	Red		Off		Red	Modem connected at 14.4Kbps
Off	Red		Off		Red	Modem connected at slower than 9600bps

DIAGNOSTIC LED(S) (CON'T)
LED	Color	Status	Condition
24	Red	On	Modem connected at 2400bps
24	Red	Off	Modem not connected at 2400bps
12	Red	On	Modem connected at 1200bps
12	Red	Off	Modem not connected at 1200bps
OH	Red	On	Modem is off-hook
OH	Red	Blinking	Modem is dialing in pulse mode
OH	Red	Off	Modem is on-hook
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
EC	Red	On	Error correction enabled
EC	Red	Blinking	Data compression enabled
EC	Red	Off	Error correction disabled
FX	Red	On	Modem is connected in FAX mode
FX	Red	Off	Modem is not connected in FAX mode
LB	Red	On	Battery is low (approx. 10 minutes left)
LB	Red	Off	Battery is good

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, A/

A, B, D, E, H, M, O, P, T, V, X, Y, Z

&D, &G, &P, &T

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S25, S30

Note: See MHI help file for complete information.

AUTO-RELIABLE FALLBACK
Type:	Configuration
Format:	AT [cmds] $Fn [cmds]
Description:	Selects whether error correction can be disabled by a <CR> while handshaking.
Command	Function
$F0	Auto-reliable fallback disabled.
í $F1	Auto-reliable fallback enabled.

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

BREAK TIME
Type:	Register
Format:	AT [cmds] S17=n [cmds]
Default:	25
Range:	0 - 255
Unit:	10 mS
Description:	Sets the length of the break signal that the modem will send.

CALLING TONE
Type:	Configuration
Format:	AT [cmds] $Tn [cmds]
Description:	Controls the transmission of the calling tone while dialing.
Command	Function
$T0	Calling tone enabled.
í $T1	Calling tone disabled.

COMMAND SET
Type:	Configuration
Format:	AT [cmds] &Qn [cmds]
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 [cmds] &En [cmds]
Description:	Selects data compression.
Command	Function
&E14	Data compression disabled.
í &E15	Data compression enabled.

COMPRESSION MODE
Type:	Configuration
Format:	AT [cmds] #Ln [cmds]
Description:	Selects the active data compression protocols.
Command	Function
í #L0	MNP and V.42 negotiation enabled.
#L1	MNP negotiation enabled.
#L2	V.42 negotiation enabled.
#L3	V.42 enabled, no negotiation.

CTS SIGNAL
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Controls the behaviour of the CTS signal.
Command	Function
&R0	CTS normal.
í &R1	CTS forced high.
&R2	CTS forced high except for 1 second at disconnect.

CTS, DCD, AND DSR DISCONNECT TIME
Type:	Register
Format:	AT [cmds] S24=n [cmds]
Default:	20
Range:	0 - 255
Unit:	50 mS
Description:	Selects the amount of time that the CTS, DCD, and DSR signals will be forced low at disconnect if this option is selected by the &R, &C, and &S commands, respectively. See these commands for more information.

CTS/RTS SIGNALS
Type:	Configuration
Format:	AT [cmds] &RFn [cmds]
Description:	Selects whether the state of the CTS signal is dependent on the state of the RTS signal.
Command	Function
&RF0	CTS follows RTS.
í &RF1	CTS is independent of RTS.

DATA FORMAT
Type:	Configuration
Format:	AT [cmds] $EBn [cmds]
Description:	Selects the data format of the serial port.
Command	Function
í $EB0	Sets 10-bit mode.
$EB1	Sets 11-bit mode.

DCD SIGNAL
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
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 disconnect.
&C4	Modem resets on low CD.

DIAL STORED PHONE NUMBER
Type:	Immediate
Format:	AT [cmds] Na [Nb, Nc...]
Description:	Dials stored phone number(s). If the first number is busy, the modem will proceed to the next number in the list.

DISPLAY INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested about the modem.
Command	Function
I0	Displays product identification code.
I1	Displays firmware version.
I2	Displays product name.

DISPLAY CONFIGURATION
Type:	Immediate
Format:	AT Ln
Description:	Displays the requested information about the modem's current configuration and command settings.
Command	Function
L0	Displays stored phone numbers.
L5	Displays all settings.
L6	Displays the values of all S-registers.
L7	Displays extended parameters.

DSR SIGNAL
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Controls the behaviour of the DSR signal.
Command	Function
&S0	DSR forced high.
í &S1	DSR normal.
&S2	DSR forced high except for 1 second at disconnect.

DSR/DCD SIGNALS
Type:	Configuration
Format:	AT [cmds] &SFn [cmds]
Description:	Selects whether the state of the DSR signal is dependent on the state of the DCD signal.
Command	Function
í &SF0	DSR follows DCD.
&SF1	DSR is independent of DCD.

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

ESCAPE SEQUENCE - OUT OF BAND
Type:	Immediate
Format:	<BREAK> AT [cmds]<CR>
Description:	Puts the modem in Command Mode.

ESCAPE SEQUENCE TIMEOUT
Type:	Register
Format:	AT [cmds] S32=n [cmds]
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.

ESCAPE SEQUENCE TYPE
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Description:	Sets type of command escape sequence the modem will recognise.
Command	Function
%E0	Command escape disabled.
í %E1	TIES escape (+++AT...)
%E2	<BREAK> AT method.
%E3	Both TIES and BREAK methods.

ESCAPE SEQUENCE RESPONSE
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Description:	Sets the response that the modem will give to an escape sequence.
%E4	OK response to command escape disabled.
í %E5	OK response to command escape enabled.

FACTORY DEFAULTS
Type:	Immediate/Configuration
Format:	AT [cmds] &Fn [cmds]
Description:	Loads factory defaults, or sets write protect on NVRAM.
Command	Function
&F0	Reloads defaults by setting.
í &F8	Sets &F to read factory defaults from ROM, and disables NVRAM write protect.
&F9	Sets &F to read defaults from NVRAM, and enables write-protect.

FALLBACK MODE
Type:	Configuration
Format:	AT [cmds] #Fn [cmds]
Description:	Sets direction of fallback.
Command	Function
#F0	Fallback disabled.
#F1	Fallback from 14.4Kbps to 2400bps as line quality degrades.
í #F2	Fallback from 2400bps to 14.4Kbps as line quality improves.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Description:	Selects flow control.
Command	Function
&E12	Flow control disabled.
í &E13	Flow control enabled.

FLOW CONTROL - ENQ/ACK
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Description:	Selects Hewlett-Packard ENQ/ACK pacing.
Command	Function
í &E8	Enables Hewlett-Packard ENQ/ACK pacing.
&E9	Disables Hewlett-Packard ENQ/ACK pacing.

FLOW CONTROL IN NORMAL MODE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Description:	Selects whether the modem will use XON/XOFF flow control for non-error-correcting connections.
Command	Function
í &E10	XON/XOFF disabled for non-error-correcting connections.
&E11	XON/XOFF enabled for non-error-correcting connections.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Description:	Sets the 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]
Description:	Configures which speeds the modem may attempt to connect at during the initial handshake phase.
Command	Function
í #A0	Attempts in order: 14.4Kbps, 9600bps, 4800bps, 2400bps, 1200bps, 300bps.
#A1	Attempts 14.4Kbps connection only.
#A2	Attempts in order: 14.4Kbps, 9600bps, 4800bps.
#A3	Attempts in order: 2400bps, 1200bps, 300bps.

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

LOCAL SERIAL PORT SPEED
Type:	Configuration
Format:	AT [cmds] $SBnnn [cmds]
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.
í $SB57600	Sets 57.6Kbps speed.

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] $BAn [cmds]
Description:	Sets operation of serial port speed.
Command	Function
í $BA0	Serial speed locked at rate set by $SB.
$BA1	Serial speed follows connect speed, ignoring $SB.

LINE SPEED
Type:	Configuration
Format:	AT $MBnnn
Description:	Sets the maximum allowable data exchange rate attempted during the handshaking process.
Command	Function
$MB75	Sets V.23 1200/75bps maximum connect speed.
$MB300	Sets 300bps maximum connect speed.
$MB1200	Sets 1200bps maximum connect speed.
$MB2400	Sets 2400bps maximum connect speed.
$MB4800	Sets 4800bps maximum connect speed.
$MB9600	Sets 9600bps maximum connect speed.
í $MB14400	Sets 14.4Kbps maximum connect speed.

LOGIN PASSWORD
Type:	Configuration
Format:	AT [cmds] #Ixxxx
Description:	Sets the login password to xxxx. The password must be between 6 and 10 characters, case sensitive. It defaults to MULTI-TECH.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] &BSn [cmds]
Description:	Sets the maximum transmittable block size for MNP mode.
Command	Function
&BS0	Maximum block size is 64 characters.
í &BS1	Maximum block size is 256 characters.

PARITY
Type:	Configuration
Format:	AT [cmds] #Pn [cmds]
Description:	Sets the parity of the serial port.
Command	Function
í #P0	No parity.
#P1	Odd parity.
#P2	Even parity.

REDIAL
Type:	Immediate
Format:	A:
Description:	Redials the last number dialed until it is no longer busy
Note:	Do not precede this command with AT or follow it with <CR>

REMOTE CONFIGURATION CHARACTER
Type:	Register
Format:	AT [cmds] S13=n [cmds]
Default:	37
Range:	0 - 127
Unit:	1 ASCII character
Description:	Defines the character that when received three times within the guard time set by S12, will notify the modem that a remote configuration session has been requested by the remote modem.

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Qn [cmds]
Description:	Enables modem to send result codes to the DTE.
Command	Function
í Q0	Result codes enabled.
Q1	Result codes disabled.
Q2	Result codes sent in originate mode only.

RETRANSMIT FAIL ACTION
Type:	Configuration
Format:	AT [cmds] $Rn [cmds]
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.

SETUP PASSWORD
Type:	Configuration
Format:	AT [cmds] #Sxxxx
Description:	Sets the setup password to xxxx. The password must be between 6 and 10 characters, case sensitive. It defaults to MODEMSETUP.

STORE ACTIVE PROFILE
Type:	Configuration
Format:	AT [cmds] &Wn [cmds]
Description:	Writes the values for the active profile into the NVRAM.
Command	Function
&W0	Write the active profile to stored profile 0
&W1	Does not write active profile; modem will read factory defaults on power-up or reset.

TEST MODES
Type:	Immediate
Format:	AT [cmds] Un
Description:	Puts the modem into the selected test mode.
Command	Function
U0	Begin local analog loopback test in originate mode.
U1	Begin local analog loopback test in answer mode.
U2	Request remote digital loopback.
U3	Begin local digital loopback.

TRELLIS CODING
Type:	Configuration
Format:	AT [cmds] #Tn [cmds]
Description:	Selects whether the modem will use trellis coding.
Command		Function
#T0		Trellis coding disabled.
í #T1		Trellis coding enabled.

UUCP SPOOFING
Type:	Configuration
Format:	AT [cmds] $SPn [cmds]
Description:	Controls the UUCP spoofing function.
Command	Function
í $SP0	Spoofing disabled.
$SP1	Spoofing enabled.

V.42 MODE
Type:	Configuration
Format:	AT [cmds] &En [cmds]
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 WITH V.21
Type:	Configuration
Format:	AT [cmds] $En [cmds]
Description:	Selects whether the modem will use V.42 error correction at V.21 300bps connections.
Command	Function
í $E0	V.42 disabled at 300bps.
$E1	V.42 enabled at 300bps.

XOFF MODE
Type:	Configuration
Format:	AT [cmds] #Xn [cmds]
Description:	Selects how XOFF characters are sent.
Command	Function
í #X0	Single XOFF character sent.
#X1	Multiple XOFF characters sent until DTE responds.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] &En [cmds]
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.