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

CONNECTIONS
Function	Label	Function	Label
Line out	CN1	Power switch	SW1
Line in	CN2	Talk/Data switch	SW2
RS-232 port	CN3	User profile 0/1 switch	SW3
DC power in	CN4

MI/MIC OR A/A1 SELECTION
Setting	E6	E7
í MI/MIC mode	Pins 1 & 2 closed	Pins 1 & 2 closed
A/A1 mode	Pins 2 & 3 closed	Pins 2 & 3 closed

TRANSMISSION LEVEL SELECTION
Setting	R51
0 dBm	20K ohm
-1 dBm	22.6K ohm
-2 dBm	24.9K ohm
-3 dBm	28K ohm
-4 dBm	31.6K ohm
-5 dBm	35.7K ohm
-6 dBm	40.2K ohm
-7 dBm	44.2K ohm
-8 dBm	49.9K ohm
í -9 dBm	56.2K ohm
-10 dBm	63.4K ohm
-11 dBm	71.5K ohm
-12 dBm	78.7K ohm
-13 dBm	88.7K ohm
-14 dBm	100K ohm
-15 dBm	113K ohm
Note: Manufacturer suggests using a resistor with a 1% tolerance. For this resistor to take effect, register S102 must not be set to a programmable mode.

DIAGNOSTIC LED(S) (MODE SELECTION)
CD	MR	Condition
Off	On	Modem is indicating asynchronous extended command mode
Off	Blinking	User has selected asynchronous extended command mode
On	Off	Modem is indicating asynchronous standard command mode
Blinking	Off	User has selected asynchronous standard command mode
On	On	Modem is indicating synchronous V.32 mode
Blinking	Blinking	User has selected synchronous V.32 mode
Note: To enter mode selection, hold down SW2 while powering the modem on. Pressing SW2 briefly cycles through modes, and holding SW2 down for at least two seconds selects the current mode.

DIAGNOSTIC LED(S) (NORMAL OPERATION)
LED	Color	Status	Condition
CD	Unidentified	On	Carrier signal detected
CD	Unidentified	Off	Carrier signal not detected
OH	Unidentified	On	Modem is off-hook
OH	Unidentified	Off	Modem is on-hook
RD	Unidentified	On	Modem is receiving data
RD	Unidentified	Off	Modem is not receiving data
SD	Unidentified	On	Modem is transmitting data
SD	Unidentified	Off	Modem is not transmitting data
CTS	Unidentified	On	CTS signal is high
CTS	Unidentified	Off	CTS signal is low
DTR	Unidentified	On	DTR signal is high
DTR	Unidentified	Off	DTR signal is low
MR	Unidentified	On	Power is on
MR	Unidentified	Off	Power is off

SUPPORTED STANDARD COMMANDS (STANDARD MODE)

Basic AT Commands

+++, ‘comma’, A/

A, B, D, E, F, H, I, L, M, N, O, Q, V, W, X, Y, Z

&C, &D, &F, &G, &J, &K, &L, &M, &P, &Q, &R, &S, &T, &V, &W, &X, &Y, &Z

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, S36, S37, S38

SUPPORTED STANDARD COMMANDS (ENHANCED MODE)

Basic AT Commands

+++, ‘comma’, A/

A, C, E, F, H, M, O, V, W, Y

&P, &T

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, S38

Note: See MHI documentation for complete information.

ENHANCED MODE COMMAND
Type:	Special
Format:	AT ~[cmd]
Example:	AT ~I4 &X1 ~S150=2<CR>
Description:	The command immediately following the ~ character will be executed as an enhanced mode command. No other commands on the command line will be affected.
Note:	This character may be changed by register S222.

ANSWER/ORIGINATE MODE
Type:	Register
Format:	AT [cmds] S100=n [cmds]
Description:	Selects whether the modem answers and originates calls normally or in the reverse mode.
Command		Function
í S100=0		Modem answers calls in answer mode and originates calls in originate mode.
S100=1		Modem answers calls in originate mode and originates calls in answer mode.

ASYNC/SYNC MODE
Type:	Register
Format:	AT [cmds] S150=n [cmds]
Description:	Selects the operating mode of the modem.
Command		Function
í S150=0		Modem will operate in asynchronous mode.
S150=2		Modem will operate in synchronous mode. The RS-232 secondary transmit/receive pair may be used to connect a command terminal to enter commands and receive result codes.
S150=3		Modem will operate in asynchronous mode will in command mode, and synchronous while in connect mode.

AUTO-CONNECT
Type:	Register
Format:	AT [cmds] S101=n [cmds]
Description:	Selects whether the modem will attempt to connect automatically when no carrier is detected even when no call has been made or received.
Command		Function
í S101=0		Modem does not attempt to auto-connect.
S101=1		Modem attempts to connect in answer mode every 20 seconds.
S101=2		Modem attempts to connect in originate mode every 20 seconds.
S101=3		Modem attempts to connect in answer mode immediately after carrier is lost, then pauses 20 seconds before retrying.
S101=4		Modem attempts to connect in originate mode immediately after carrier is lost, then pauses 20 seconds before retrying.

BREAK TYPE
Type:	Register
Format:	AT [cmds] S54=n [cmds]
Description:	Configures the modem’s reaction to a break signal.
Command		Function
í S54=0		Online command mode enabled, break not sent to remote modem.
S54=3		Modem sends break in sequence when in data mode, and immediately when in command mode.
S54=4		Break signal ignored.

CD SIGNAL
Type:	Register
Format:	AT [cmds] S131=n [cmds]
Description:	Controls the behaviour of the CD signal.
Command		Function
S131=0		CD forced high.
S131=1		CD normal.
í S131=2		CD is brought high when modem is ready in command mode or is ready to accept data.
S131=3		CD is brought high when modem is ready in command mode or is ready to accept incoming data. When modem disconnects, DSR is brought low for time specified by S47.
S131=4		CD follows the inverse of CTS.

CLOCK SOURCE
Type:	Register
Format:	AT [cmds] S154=n [cmds]
Description:	Selects where the modem derives the clock used in synchronous modes.
Command		Function
í S154=0		Modem uses internal clock source.
S154=1		Modem uses external clock source.
S154=2		Modem is a slave to received clock source.

COMMAND SET
Type:	Immediate
Format:	AT [cmds] &B
Description:	Disables the AT command set.

COMMAND SET TYPE
Type:	Register
Format:	AT [cmds] S63=n [cmds]
Description:	Selects whether the AT prefix is required in command mode, and which form of the AT command set will be used.
Command		Function
S63=0		AT prefix not required and enhanced command set enabled. All characters entered in command mode will be assumed to be commands.
S63=1		AT prefix required for command mode and enhanced command set enabled.
S63=2		AT prefix required for command mode and standard command set enabled.

CONNECT MODE
Type:	Register
Format:	AT [cmds] S95=n [cmds]
Description:	Selects the type of MNP mode connection that the modem will attempt to make.
Command		Function
í S95=0		Normal mode connection only.
S95=1		MNP reliable mode connection only.
S95=2		MNP auto-reliable mode connection.

CTS SIGNAL
Type:	Register
Format:	AT [cmds] S67=n [cmds]
Description:	Controls the behaviour of the CTS signal.
Command		Function
í S67=0		CTS is forced high.
S67=1		CTS follows RTS. When RTS goes high, there is a 200 mS delay before CTS follows.
S67=2		CTS follows RTS. When RTS goes high, there is a delay specified by S26 before CTS follows.

DATA COMPRESSION
Type:	Register
Format:	AT [cmds] S96=n [cmds]
Description:	Selects whether the modem will attempt to use MNP data compression.
Command		Function
S96=0		Data compression disabled.
í S96=1		Data compression enabled.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Description:	Dials the telephone number indicated 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
DP	Pulse dialing enabled.
DR	Answer mode enabled; originate mode disabled following handshake initiation.
DNn	Dial stored telephone number n.
DT	Tone dialing enabled.
DW	Dialing resumed following dial tone detection.
D,	Dialing paused for amount of time specified in S8 register.
D!	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.
D\x\	Dials the stored telephone number with description x.

DIAL INTERRUPT
Type:	Register
Format:	AT [cmds] S64=n [cmds]
Description:	Selects whether the modem will abort a dial, answer, or connect sequence if characters are received from the DTE.
Command		Function
í S64=0		Sequence aborted.
S64=1		Sequence not aborted.

DISPLAY CONFIGURATION
Type:	Immediate
Format:	AT [cmds] &Nn [cmds]
Description:	Displays the specified configuration stored in non-volatile RAM.
Command	Function
í &N0	Display profile specified by S255.
&N1	Display profile 0.
&N2	Display profile 1.

DSR DELAY ON DISCONNECT
Type:	Register
Format:	AT [cmds] S47=n [cmds]
Default:	4
Range:	0 - 255
Unit:	50 mS
Description:	Sets the time that DSR is forced low after disconnect.

DSR SIGNAL
Type:	Register
Format:	AT [cmds] S130=n [cmds]
Description:	Controls the behaviour of the DSR signal.
Command		Function
S130=0		DSR is forced high.
S130=1		DSR is brought high when an answer tone is sent or received.
í S130=2		DSR is brought high when modem is ready in command mode or is ready to accept data.
S130=3		DSR is brought high when modem is ready in command mode or is ready to accept data. When modem disconnects, DSR is brought low for time specified by S47.
S130=4		DSR is brought high when modem goes off hook.
S130=5		DSR follows remote carrier.
S130=6		If modem is off line and DTR goes high, DSR will be brought high. If DTR is high and a connection is made, DSR will be brought high. If DTR goes low or carrier is lost, DSR will be brought low.

DTR DIALING
Type:	Register
Format:	AT [cmds] S104=n [cmds]
Description:	Selects whether the modem will auto-dial the first stored number on DTR signal changes.
Command		Function
í S104=0		DTR dialing disabled.
S104=1		Modem auto-dials stored number specified by the current configuration on low-to-high DTR change.
S104=3		Modem auto-dials stored number specified by the current configuration when SW2 is pressed.
S104=4		When DTR goes high, the modem will connect in answer mode if the value stored in register S1 is greater than that stored in S0. Otherwise, it will connect in originate mode.

DTR SIGNAL
Type:	Register
Format:	AT [cmds] S52=n [cmds]
Description:	Controls the modem’s response to the DTR signal.
Command		Function
S52=0		Modem assumes DTR is forced high.
í S52=1		Modem goes idle on low DTR.
S52=2		Modem is reset on low DTR.
S52=3		Modem enters command mode on low DTR.
S52=4		Modem disconnects, disables auto-answer, and enters command mode on low DTR.

EIGHTH BIT FILTER
Type:	Register
Format:	AT [cmds] S48=n [cmds]
Description:	Selects whether the high bit of a character is cleared before detection of XON, XOFF and escape characters.
Command		Function
í S48=0		Eighth bit is cleared.
S48=1		Eighth bit is not cleared.

ESCAPE SEQUENCE RESPONSE
Type:	Register
Format:	AT [cmds] S55=n [cmds]
Description:	Configures the modem’s reaction to an escape sequence.
Command		Function
í S55=0		Modem returns to command mode after set guard time has passed and escape characters sent to remote modem.
S55=1		Buffers are cleared and escape characters sent to remote modem.
S55=2		Escape characters sent to remote modem immediately.
S55=3		Escape characters sent with transmitted data.

ENHANCED MODE CHARACTER
Type:	Register
Format:	AT [cmds] S222=n [cmds]
Default:	126
Range:	0 - 127
Unit:	1 ASCII character
Description:	Sets the character used in standard mode to execute enhanced mode commands.

FACTORY DEFAULT PROFILE
Type:	Immediate
Format:	AT [cmds] &Fn [cmds]
Description:	Returns the command settings to the values found in one of the factory default profiles.
Command		Function
&F0		Restores enhanced mode settings.
&F1		Restores standard mode settings.
&F3		Restores V.32 synchronous mode settings.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S57=n [cmds]
Default:	19
Range:	0 - 255
Unit:	ASCII
Description:	Sets the character used to represent the XOFF character.

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S56=n [cmds]
Default:	17
Range:	0 - 255
Unit:	ASCII
Description:	Sets the character used to represent the XON character.

FLOW CONTROL TYPE - DCE
Type:	Register
Format:	AT [cmds] S68=n [cmds]
Description:	Sets type of flow control used by the modem.
Command	Function
S68=0	Flow control disabled.
S68=2	Bidirectional RTS/CTS flow control enabled.
S68=3	Bidirectional XON/XOFF flow control enabled.
S68=4	Bidirectional XON/XOFF and RTS/CTS enabled.
S68=5	Flow control disabled; ENQ/ACK characters sent to remote modem.
S68=6	Bidirectional XON/XOFF enabled; ENQ/ACK characters sent to remote modem.
í S68=255	Use flow control specified in S58.

FLOW CONTROL TYPE - DTE
Type:	Register
Format:	AT [cmds] S58=n [cmds]
Description:	Sets type of flow control used by the DTE.
Command	Function
S58=0	Flow control disabled.
S58=1	Unidirectional RTS flow control enabled.
S58=2	Bidirectional RTS/CTS flow control enabled.
í S58=3	Bidirectional XON/XOFF flow control enabled.
S58=4	Bidirectional XON/XOFF and RTS/CTS enabled.
S58=5	Flow control disabled; ENQ/ACK characters sent to remote modem.
S58=6	Bidirectional XON/XOFF enabled; ENQ/ACK characters sent to remote modem.
S58=7	Transparent XON/XOFF enabled.

FREQUENCY OFFSET
Type:	Read-only
Format:	AT [cmds] S77? [cmds]
Description:	Displays the frequency offset for the current connection.

GUARD TONE
Type:	Register
Format:	AT [cmds] S91=n [cmds]
Description:	Commands the modem to transmit a guard tone in V.22/V.22bis mode.
Command	Function
í S91=0	Guard tone disabled.
S91=1	1800Hz guard tone enabled.
S91=2	550Hz guard tone enabled.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S41=n [cmds]
Default:	0
Range:	0-255
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.

LINE OUT PINS
Format:			AT [cmds] S102=n [cmds]
Default:			0
Range:			0 - 6
Description:			Selects the functions, if any, of pins 3 & 6 and 7 & 8 of the RJ-45 telephone line out jack.
Bit	Value			Function
1, 0	í 00 01 10			Pins 3 & 6 have no function. Pins 3 & 6 are A/A1 signals. Pins 3 & 6 are MI/MIC signals.
2		í 0 1			Pins 7 & 8 have no function; modem is in permissive or normal transmission level. Pins 7 & 8 are to set the programmable transmission level.

LINE QUALITY
Type:	Read-only
Format:	AT [cmds] S78? [cmds]
Default:	N/A
Range:	0 - 100
Unit:	N/A
Description:	Displays the quality of the current connection. Larger numbers indicate a better connection.

LOCAL SERIAL PORT SPEED
Type:	Register
Format:	AT [cmds] S51=n [cmds]
Description:	Selects the speed at which the modem will communicate with the host computer.
Command		Function
S51=0		Set speed to 300bps.
S51=1		Set speed to 1200bps.
S51=2		Set speed to 2400bps.
S51=3		Set speed to 4800bps.
í S51=4		Set speed to 9600bps.
S51=5		Set speed to 19.2Kbps.
S51=252		Auto-detect speed from received "A" or "a" character. User may not type new command until result code is displayed.
S51=254		Auto-detect speed from received "A" or "a" character. This speed is used until disconnect, reset, or received break. User may type new command before result code is displayed. If no command has been entered since the modem has been powered on, assume next command will be at 19.2Kbps.
S51=255		Auto-detect speed from received "A" or "a" character. This speed is used until disconnect, reset, or received break. User may type new command before result code is displayed. If no command has been entered since the modem has been powered on, assume next command will be at 9600bps.

LOCK SERIAL PORT
Type:	Register
Format:	AT [cmds] S66=n [cmds]
Description:	Sets operation of serial port speed.
Command	Function
í S66=0	Serial port speed follows connect speed.
S66=1	Serial port speed locked.
S66=2	Serial port speed locked. Use flow control in connect mode but not in command mode.

PRODUCT ID NUMBER
Type:	Register
Format:	AT [cmds] S49=n [cmds]
Description:	Selects what the modem will report as its product ID number.
Command		Function
í S49=0		Modem reports normal ID number.
S49=1		Modem reports 123 as its ID number.
S49=2		Modem reports 965 (TrailBlazer Plus) as its ID number.

PROMPT CHARACTER
Type:	Register
Format:	AT [cmds] S59=n [cmds]
Default:	0
Range:	0 - 255
Unit:	1 ASCII character
Description:	Sets what character will be used as a prompt when in command mode. If S59 is set to 0 then no prompt will be given.

PROTOCOL/SPEED
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Description:	Selects the protocol used for communications.
Command		Function
í S50=0		Auto-detect fastest common protocol.
S50=1		Use Bell 103.
S50=2		Use Bell 212A or V.22.
S50=3		Use V.22bis.
S50=6		Use V.32.
S50=254		Use speed of last AT command.

PROTOCOL SELECTION
Type:	Register
Format:	AT [cmds] S90=n [cmds]
Description:	Selects which protocol will be used when making 1200bps connections.
Command		Function
í S90=0		Use Bell 212A.
S90=1		Use V.22.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested.
Command	Function
I0	Reports modem model and revision.
I1	Reports total of error codes for executed tests.
I2	Reports the current connect mode.
I4	Reports current connection statistics.

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Qn [cmds]
Description:	Selects when result codes will be reported.
Command		Function
í Q0		All result codes will be reported.
Q1		Only remote result codes will be reported.
Q2		Only local result codes will be reported.
Q3		No result codes will be reported.
Q4		All remote result codes will be reported; local result codes will only be reported if an ATD or ATA command was entered. Modem does not report the RING result code in any mode.
Q5		Local result codes will only be reported if an ATD or ATA command was entered. Modem does not report the RING result code in any mode.
Q6		All remote result codes will be reported; modem will not report basic result codes when in answer mode. Modem does not report the RING result code in any mode.
Q7		Modem will not report remote result codes. Modem will not report local basic result codes when in answer mode. Modem does not report the RING result code in any mode.
Q8		All remote result codes will be reported; local result codes will only be reported if the local modem Is originating.
Q9		Local result codes will only be reported if the local modem Is originating.

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Xn [cmds]
Description:	Enables dial tone detection and selects which result codes the computer will return.
Command	Function
X0	Busy and dial tone detection disabled; basic result codes only enabled.
í X1	Busy and dial tone detection enabled; all standard result codes enabled.
X2	Busy and dial tone detection enabled; all standard and MNP result codes enabled.
X10	Busy and dial tone detection disabled; basic result codes only enabled.
X11	Busy and dial tone detection disabled; basic result codes with connect speed enabled.
X12	Busy tone detection disabled, dial tone detection enabled; basic result codes with connect speed enabled.
X13	Busy tone detection enabled, dial tone detection disabled; basic result codes with connect speed enabled.
X14	Busy and dial tone detection enabled; basic result codes with connect speed enabled.

RETRAIN
Type:	Immediate
Format:	AT [cmds] &R [cmds]
Description:	Initiates a retrain.

SPEAKER VOLUME
Type:	Register
Format:	AT [cmds] S61=n [cmds]
Default:	150
Range:	0 - 255
Unit:	N/A
Description:	Sets the volume of the speaker to the number specified. Larger numbers indicate higher volume.

SPEED NEGOTIATION
Type:	Register
Format:	AT [cmds] S94=n [cmds]
Description:	Sets how the modem will negotiate the connection speed in regards to the S50 register.
Command		Function
S94=0		Modem will connect only at speed set by S50.
í S94=1		Modem will connect at any speed up to and including the speed set by S50.
S94=2		Modem will connect at any speed supported by the data modulation set by S50.
S94=3		Modem will connect at the speed set by S50 and, if possible, fall back to the next lowest speed.

SOFT RESET
Type:	Immediate
Format:	AT [cmds] Zn [cmds]
Description:	Resets modem and command settings to the profile specified.
Command	Function
í Z0	Restore profile specified by S255.
Z1	Restore profile 0.
Z2	Restore profile 1.

SOFT RESET
Type:	Immediate
Format:	AT [cmds] &En [cmds]
Description:	Resets modem and command settings to the profile specified.
Command	Function
í &E0	Restore profile specified by S255.
&E1	Restore profile 0.
&E2	Restore profile 1.

STORE CONFIGURATION
Type:	Immediate
Format:	AT [cmds] &Wn [cmds]
Description:	Stores the current configuration to the specified profile in non-volatile RAM.
Command	Function
í &W0	Store to profile specified by S255.
&W1	Store to profile 0.
&W2	Store to profile 1.

STORE TELEPHONE NUMBER
Type:	Configuration
Format:	AT [cmds] Nn=<#>\xxxx\ [cmds]
Description:	Stores the indicated telephone number at memory location n. The string xxxx between the backslashes sets an optional name for that stored number.
Note:	If additional commands are to be given after this command, the backslashes must be used even if there is no string between them.

TALK/DATA SWITCH
Type:	Register
Format:	AT [cmds] S105=n [cmds]
Description:	Controls the operation of SW2.
Command		Function
S105=0		Talk/Data switch disabled.
í S105=1		Talk/Data switch enabled.
S105=2		Talk/Data switch enabled when modem is on hook.

USER PROFILE
Type:	Register
Format:	AT [cmds] S255=n [cmds]
Description:	Sets which user profile will be used as the default.
Command		Function
S255=0		Default profile set by SW3.
S255=1		Modem will load profile 0 by default. Auto-dial functions use first stored number.
S255=2		Modem will load profile 1 by default. Auto-dial functions use second stored number.

V.32 ANSWER MODE TIMER
Type:	Register
Format:	AT [cmds] S93=n [cmds]
Default:	8
Range:	3 - 255
Unit:	.1 second
Description:	Sets the amount of time that, when in answer mode, the modem will wait for a V.32 originate sequence before dropping down to the next slowest protocol.

VOICE MODE
Type:	Immdeiate
Format:	AT [cmds] G [cmds]
Description:	Commands the modem to break the data connection and go on-hook so that the line may be used for voice mode. If the telephone’s handset is picked up, the call will not be disconnected.

XOFF REISSUE
Type:	Register
Format:	AT [cmds] S65=n [cmds]
Description:	Selects whether the modem will reissue XOFF characters if the DTE continues to transmit after an XOFF.
Command		Function
í S65=0		Modem will not reissue XOFF characters.
S65=1		Modem will reissue XOFF characters.

XON HANDLING
Type:	Register
Format:	AT [cmds] S69=n [cmds]
Description:	Sets how the modem processes XON characters coming from the DTE.
Command		Function
í S69=0		XON character is trapped by modem.
S69=1		XON character is passed to remote modem.
S69=2		XON character trapped by modem if it is in XOFF state; otherwise, it is passed to remote modem.