Card Type	Modem (synchronous/asynchronous)
Chipset	Unidentified
I/O Options	Voice, speakerphone, DSVD
Maximum Data Rate	28.8Kbps
Maximum Fax Rate	14.4Kbps
Data Modulation	Bell 103A, 212A ITU-T V.21, V.22, V.22bis, V.32, V.32bis, V.34 Rockwell V.FC
Fax Modulation	ITU-T V.17, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis
Fax Class	Class I & II
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
DC power in	CN1	Telephone line in	CN4
Serial port	CN2	Power switch	SW1
Telephone line out	CN3

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
TM/FAX	Green	On	Modem is connected in FAX mode
TM/FAX	Green	Blinking	Modem is in test mode
TM/FAX	Green	Off	Modem is not connected in FAX mode
288	Green	On	Modem connected at 28.8Kbps
288	Green	Off	Modem connected at slower than 28.8Kbps
144	Green	On	Modem connected at 14.4Kbps or faster
144	Green	Off	Modem connected at slower than 14.4Kbps
24	Green	On	Modem connected at 2400bps or 1200bps
24	Green	Off	Modem not connected at 2400bps or 1200bps
EC	Green	On	Error correction enabled
EC	Green	Off	Error correction disabled

DIAGNOSTIC LED(S) (CON'T)
LED	Color	Status	Condition
AA	Green	On	Auto-answer enabled
AA	Green	Off	Auto-answer disabled
AA	Green	Blinking	Phone is ringing
CD	Green	On	Carrier signal detected
CD	Green	Off	Carrier signal not detected
OH	Green	On	Modem is off-hook
OH	Green	Off	Modem is on-hook
OH	Green	Blinking	Modem is dialing in pulse mode
SD	Green	On	Modem is transmitting data
SD	Green	Off	Modem is not transmitting data
RD	Green	On	Modem is receiving data
RD	Green	Off	Modem is not receiving data
TR	Green	On	DTR signal is high
TR	Green	Off	DTR signal is low
PWR	Green	On	Power is on
PWR	Green	Off	Power is off

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z

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

Extended AT Commands

\A, \B, \G, \K, \L, \N

%C, %E, %L, %Q

Special AT Commands

#CID, +MS

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S25, S26

S27, S29, S30, S31, S32, S33, S36, S38, S40, S41, S46, S48, S82, S86, S95

Note: See MHI help file for complete information.

DISPLAY CHIPSET MANUFACTURER
Type:	Immediate
Format:	AT [cmds] #MFR? [cmds]
Description:	Displays the voice chipset manufacturer’s name.

DISPLAY CHIPSET MODEL NAME
Type:	Immediate
Format:	AT [cmds] #MDL? [cmds]
Description:	Displays the model name of the modem's voice chipset.

DISPLAY CHIPSET REVISION
Type:	Immediate
Format:	AT [cmds] #REV? [cmds]
Description:	Displays the revision level of the modem's voice chipset.

DSVD MODE
Type:	Configuration
Format:	AT [cmds] -SSE=n [cmds]
Description:	Select whether the modem will use DSVD mode.
Command	Function
í -SSE=0	DSVD mode disabled.
-SSE=1	DSVD mode enabled.

MODE SELECTION
Type:	Immediate
Format:	AT [cmds] #CLS=n [cmds]
Description:	Selects which mode the modem will operate in.
Command	Function
#CLS=0	Modem will operate in data mode.
#CLS=1	Modem will operate in fax class 1 mode.
#CLS=2	Modem will operate in fax class 2 mode.
#CLS=8	Modem will operate in voice mode.

TONE DETECTION
Format:			AT [cmds] #VTD=x,y,z [cmds]
Default:			x,y,z 3F
Range:			0 - 3F (hexadecimal)
Description:			Sets which tones the tone detection will report.
Note:			The value of x sets the tone detection modes in voice transmit mode, y sets them in voice receive mode, and z sets them in voice command mode.
Bit	Value			Function
0	0 í 1			DTMF tones are not detected. DTMF tones are detected.
1		0 í 1			V.25 1300Hz calling tone is not detected. V.25 1300Hz calling tone is detected.
2		0 í 1			T.30 1100Hz fax tone is not detected. T.30 1100Hz fax tone is detected.
3		0 í 1			V.25/T.30 2100Hz answer tone is not detected. V.25/T.30 2100Hz answer tone is detected.
4		0 í 1			Bell 2225Hz answer tone is not detected. Bell 2225Hz answer tone is detected.
5		0 í 1			Call progress tones are not detected. Call progress tones are detected.

TONE GENERATOR - DIRECT ENTRY
Type:	Immediate
Format:	AT [cmds] #VTS=[m, n, x]
Range:	m 200-3000, n 200-3000, x 0-255
Unit:	m 1 Hz, n 1 Hz, x .1 second
Description:	Generates a dual-frequency tone for duration x at frequencies m and n.

TONE GENERATOR - TIMED PHONE KEYS
Type:	Immediate
Format:	AT [cmds] #VTS={a, n}
Range:	a 0-9, A-D, #, *; x 0-255
Unit:	n .1 second
Description:	Generates the DTMF tone for duration x for the character a.

TONE GENERATOR - PHONE KEYS
Type:	Immediate
Format:	AT [cmds] #VTS=a
Range:	0-9, A-D, #, *
Description:	Generates the DTMF tones for the characters in the string for the duration set with +VBT.

TONE GENERATOR LENGTH
Format	AT [cmds] #VBT=n [cmds]
Default:	10
Range:	0 - 40
Unit:	0.1 second
Description:	Sets the length of DTMF tones that are generated.

VOICE BUFFER SPACE
Type:	Configuration
Format:	AT [cmds] #VSK=n [cmds]
Default:	255
Range:	0 - 255
Unit:	1 byte
Description:	Sets the amount of data the modem can send into the buffer after the XOFF signal is sent.

VOICE DEVICE
Type:	Configuration
Format:	AT [cmds] #VLS=n [cmds]
Description:	Selects the I/O device for the DSP chip.
Command	Function
í #VLS=0	Telephone line and handset used for voice I/O.
#VLS=1	Telephone handset used for voice I/O.
#VLS=2	Internal speaker only used for voice I/O.
#VLS=3	External microphone only used for voice I/O.
#VLS=4	Telephone line and handset used for voice I/O; internal speaker enabled.
#VLS=5	Headset used for voice I/O.
#VLS=6	Speakerphone used for voice I/O.
#VLS=7	Handset muted by disconnecting handset or speakerphone from telephone line.
#VLS=8	Connects caller ID relay for recording of conversation over handset.
#VLS=9	Connects handset (or speakerphone) to DSP chip for recording or playback.

VOICE - DISPLAY BUFFER SIZE
Type:	Immediate
Format:	AT [cmds] #VBQ? [cmds]
Description:	Displays the size of the voice buffer.

VOICE - DISPLAY COMPRESSION TYPE
Type:	Immediate
Format:	AT [cmds] #VCI? [cmds]
Description:	Displays the type of compression currently in use.

VOICE - LOCAL SERIAL PORT SPEED
Type:	Configuration
Format:	AT [cmds] #BDR=n [cmds]
Default:	0
Range:	0 - 48
Unit:	2400bps
Description:	Sets the speed of the local serial port when in voice mode. A value of 0 indicates that the modem should auto-detect the correct serial port speed.

VOICE RE-RING DETECT TIME
Type:	Configuration
Format:	AT [cmds] #VRA=n [cmds]
Default:	70
Range:	0-255
Unit:	10 mS
Description:	Sets the maximum time the modem will wait for the remote station to ring again before it assumes that it has gone off-hook.

VOICE RECEIVE
Type:	Immediate
Format:	AT [cmds] #VRX
Description:	Commands the modem to begin receiving voice data.

VOICE RING DETECT TIME
Type:	Configuration
Format:	AT [cmds] #VRN=n [cmds]
Default:	Unidentified
Range:	Unidentified
Unit:	Unidentified
Description:	Sets the maximum time the modem will wait for the remote station to ring before it assumes that it went off-hook before it rang.

VOICE SAMPLE QUALITY
Type:	Configuration
Format:	AT [cmds] #VBS=n [cmds]
Description:	Selects the number of bits per sample that the modem records.
Command	Function
#VBS=2	Modem records 2 bits per sample in ADPCM encoding.
í #VBS=4	Modem records 4 bits per sample in ADPCM encoding.
#VBS=8	Modem records 8 bits per sample in PCM encoding.

VOICE SAMPLING RATE
Type:	Configuration
Format:	AT [cmds] #VSR=n [cmds]
Description:	Sets the sampling rate used when recording voice signals.
Command	Function
í #VSR=7200	Selects a sampling rate of 7.2KHz.
#VSR=11025	Selects a sampling rate of 11.025KHz in PCM encoding only.

VOICE SILENCE DETECTION TIME
Type:	Configuration
Format:	AT [cmds] #VSP=n [cmds]
Default:	Unidentified
Range:	0 - 255
Unit:	.1 second
Description:	Sets the minimum amount of silence that the modem will detect.

VOICE SILENCE DETECTION THRESHOLD
Type:	Configuration
Format:	AT [cmds] #VSS=n [cmds]
Description:	Sets the threshold of sensitivity that the modem uses to determine silence detection.
Command	Function
#VSS=0	Silence detection disabled.
#VSS=1	Minimum silence detection sensitivity.
#VSS=2	Standard silence detection sensitivity.
#VSS=3	Maximum silence detection sensitivity.

VOICE TIMING MARK
Type:	Configuration
Format:	AT [cmds] #VTM=n [cmds]
Description:	Configures timing mark placement.
Command		Function
#VTM=0		Timing marks disabled.
#VTM=10		Timing marks enabled at 1 second intervals.

VOICE TRANSMISSION LEVEL
Type:	Configuration
Format:	AT [cmds] #TL=hhhh [cmds]
Default:	3F44 for phone line, 7FFF for handset or speaker
Range:	0000 - 7FFF
Unit:	Unidentified (hexadecimal)
Description:	Sets the transmission level for sending audio in voice mode.

VOICE TRANSMIT
Type:	Immediate
Format:	AT [cmds] #VTX
Description:	Commands the modem to begin transmitting voice data.

VOICE VOLUME LEVEL
Type:	Configuration
Format:	AT [cmds] #VGT=n [cmds]
Default:	153
Range:	128 - 228
Unit:	Unidentified
Description:	Sets the volume level when playing back audio signals.