Card Type	Modem (synchronous/asynchronous)
Chip Set	Unidentified
Maximum Data Rate	9600bps
Data Bus	External
Data Modulation Protocol	Bell 103/212A ITU-T V.21, V.22, V.22bis, V.32
Error Correction/Compression	MNP5

CONNECTIONS
Function	Label		Function		Label
Power switch		SW1		Line out		CN3
DC power		CN1		RS-232/422		CN4
Line in		CN2

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í DTR forced high	SW2/1	On
DTR normal	SW2/1	Off
í Verbose result codes	SW2/2	Off
Numeric result codes	SW2/2	On
í Result code display enabled	SW2/3	On
Result code display disabled	SW2/3	Off
í Local echo enabled	SW2/4	Off
Local echo disabled	SW2/4	On
í Auto answer disabled	SW2/5	On
Auto answer enabled	SW2/5	Off
í CD signal normal	SW2/6	Off
CD forced high	SW2/6	On
í Result codes displayed during originate and answer modes	SW2/7	Off
Result codes not displayed during answer mode when SW1/3 is On	SW2/7	On
í Smart mode	SW2/8	On
Dumb mode	SW2/8	Off
í Modem goes on-hook, command mode enabled, ‘OK’ reported	SW2/9	On
Modem remains off-hook, command mode enabled, ‘NO CARRIER’ reported	SW2/9	Off
í Load configuration from NVRAM	SW2/10	Off
Load configuration from ROM	SW2/10	On

DTE/DCE MODE SELECTION
Setting	SW3/1	SW3/2	SW3/3	SW3/4
DCE mode	Off	Off	Off	Off
DTE mode	On	On	On	On

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
HS	Red	On	Modem is operating at 2400bps or faster
HS	Red	Off	Modem is operating at slower than 2400bps
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
CD	Red	On	Carrier signal detected or when SW2/6 is on
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
SD	Red	Blinking	Modem is transmitting data
SD	Red	Off	Modem is not transmitting data
MR	Red	On	Power is on
MR	Red	Off	Power is off
MR	Red	Blinking	During test mode, retraining, including online fallback
RS	Red	On	RTS signal is high
RS	Red	Off	RTS signal is low
CS	Red	On	CTS signal is high and during synchronous mode
CS	Red	Off	CTS signal is low, synchronous mode disabled
ARQ	Red	On	Error correction enabled
ARQ	Red	Off	Error correction disabled
ARQ	Red	Blinking	Error correction activated
SYN	Red	On	AT&M3 is set or AT&M1 and synchronous mode is set
SYN	Red	Off	Modem not in synchronous mode

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, A/

A, E, F, H, M, O, P, Q, S, T, V, X

&F, &G, &J, &P, &W, &X, &Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S26

Note: See MHI Help file for full command documentation.

ABORT
Type:	Immediate
Format:	<any key>
Description:	Aborts current command issued; dial, repeat mode (>), and repeat command (A>)

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

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

BREAK LENGTH
Type:	Register
Format:	AT [cmds] S21=n [cmds]
Default:	10
Range:	Unidentified
Unit:	10 ms
Description:	Sets the length of error control mode breaks sent from DCE to DTE

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

COMMPRESSION
Type:	Configuration
Format:	AT [cmds] &Kn [cmds]
Description:	Controls data compression
Command		Function
&K0		Data compression disabled
í &K1		Auto enable/disabled data compression
&K2		Data compression enabled

CONNECTION SPEED
Type:	Configuration
Format:	AT [cmds] &Nn [cmds]
Description:	Sets required connection speed
Command	Function
í &N0	Variable
&N1	300bps
&N2	1200bps
&N3	2400bps
&N4	4800bps
&N5	7200bps
&N6	9600bps

DATA SET READY (DSR)
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Selects DSR options
Command	Function
&S0	DSR forced high
&S1	DSR high only while modem is connected

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Example:	ATDT 443-3388,,,1111;
Description:	Dials telephone number according to any modifiers included in the string
Note:	Any combination of modifiers can be used to produce the desired dial functions in sequence.
Command	Function
í P	Pulse dialing enabled
T	Tone dialing enabled
,	Dialing paused for 2 seconds
;	Modem returned to command state after dialing. Can only be placed at the end of the dial command.
!	Flash function initiated
/	Pause for 125ms then proceed with dial string
@	Dial, wait for quiet answer, then continue to execute the rest of the dial string
W	Dial, wait for second dial tone, then continue to execute the rest of the dial string
R	Answer mode enabled, originate mode disabled following handshake initiation

DIAL - STORED NUMBER
Type:	Immediate
Format:	AT [cmds] DSn [cmds]
Description:	Dial stored number from memory location n

DISCONNECT BUFFER DELAY
Type:	Register
Format	AT [cmds] S38=n [cmds]
Default:	0
Range:	Unidentified
Unit:	1 second
Description:	Sets maximum duration allowed during buffered data calls for modem to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process. A value of 0 will allow the modem to hanging-up after DTR drops.

DSR TIMER
Type:	Register
Format:	AT [cmds] S24=n [cmds]
Default:	0
Range:	0-25
Unit:	.01 second
Description:	Sets the delay between DSR pulses, when &S1 is set

ERROR CORRECTION MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects active error correction protocols
Command	Function
&M0	Normal mode only
&M3	Continuos synchronous mode
í &M4	Auto-detect mode
&M5	ARQ mode only

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] &An [cmds]
Description:	Selects extended result codes
Command	Function
&A0	/ARQ result codes disabled
í &A1	/ARQ result codes enabled

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S23=n [cmds]
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]
Default:	17
Range:	11-127
Unit:	ASCII
Description:	Sets the character used to represent XON

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &Hn [cmds]
Description:	Sets type of flow control used by modem
Command	Function
í &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

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Controls receive data hardware flow control and RTS signals
Command	Function
&R0	Delay RTS signal before sending CTS signal
í &R1	Modem ignores RTS
&R2	Received data to DTE when RTS is on

FLOW CONTROL PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] &In [cmds]
Description:	Allows modem to act on and then transmit XON/XOFF characters
Command	Function
í &I0	Software flow control disabled
&I1	XON/XOFF pass-through enabled
&I2	XON/XOFF pass-through disabled
&I3	Host mode enabled, Hewlett Packard protocol
&I4	Terminal mode enabled, Hewlett Packard protocol
&I5	XON/XOFF to remote for non-ARQ link flow control enabled

HELP SCREENS
Type:	Immediate
Format:	AT <prefix>$
Description:	Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.
Command	Function
$	Shows command summary help screen
&$	Shows extended command summary help screen
D$	Shows dial command summary help screen
S$	Shows S-register summary help screen
<CTRL>-S	Stop/restart display of help screen
<CTRL>-C	Cancel display of help screen
<CTRL>-K	Cancel display of help screen

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

LEASED LINE
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Description:	Controls lease line operation
Command		Function
í &L0		lease line operation disabled
&L1		lease line operation enabled

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] &Bn [cmds]
Description:	Sets operation of serial port speed
Command	Function
í &B0	Serial speed follows connect speed
&B1	Serial speed locked
&B2	Serial speed locked in ARQ mode only

MODULATION SELECTION
Type:	Register
Format:	AT [cmds] S27=n [cmds]
Description:	Controls the modulation for 300bps transmission
Command		Function
S27=0		Bell103 only
S27=1		ITU-T V.21, all calls answered in either Bell103 or V.21, originate calls in V.21

PAUSE
Type:	Configuration
Format:	AT [cmds] / [cmds]
Description:	Command string execution is paused for 125ms
Note:	Multiple slashed can be used consecutively to add up to the duration of delay desired.

REPEAT COMMAND CONTINUALLY
Type:	Configuration
Format:	AT [cmds] > [cmds]
Description:	Causes modem to repeat command continually until <any key> is pressed
Note:	If used in the dial string, 10 attempts will be made.

REPEAT COMMAND STRING
Type:	Configuration
Format:	AT [cmds] A> [cmds]
Description:	Causes modem to repeat continually last issued command until <any key> is pressed

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

TEST MODES
Type:	Register
Format:	AT [cmds] S16=n [cmds]
Description:	Selects modem test modes
Command	Function
í S16=0	Test mode disabled
S16=1	Analog loopback test enabled
S16=2	Dial test enabled
S16=4	Test pattern enabled
S16=5	Analog loopback test with test pattern enabled
S16=8	Remote digital loopback enabled

TIME DISPLAY
Type:	Immediate
Format:	AT [cmds] Kn [cmds]
Description:	Displays the current call time or clock time
Command	Function
í K0	Display length of last call
K1	Display actual time

TRANSMITTER
Type:	Configuration
Format:	AT [cmds] Cn [cmds]
Description:	Controls the transmitter
Command		Function
C0		Transmitter disabled, receive only mode
í C1		Transmitter enabled

V.32 - HANDSHAKE TIME
Type:	Register
Format:	AT [cmds] S28=n [cmds]
Default:	8
Range:	0-255
Unit:	.1 second
Description:	Sets length of V.32 handshake