Manuals

Command Set: Aztech MDP3900 56K Modem User's Guide

Note:

Type commands in either uppercase or lowercase letters, but not in a combination of the two. Use the <Backspace> key to delete characters if necessary.
If a command has numeric options and a number is not included, the modem assumes that the missing parameter is 0 (zero).
Every command except A/, +++, and A> must begin with AT and be executed by pressing <Enter>.

Command	Value (n)	Description
Z		Reset to Default Configuration
+FCLASS = n		Select Active Service Class
	0 (default)	Select Data Mode
	1 or 1.0	Select Facsimile Class 1.0 Mode
&F		Set to Factory-Defined Configuration
In		Request Identification Information
	0	Reports product code
	1	Reports Pre-Computed checksum
	2	Reserved
	3	Reports Firmware Version
	4	Reports OEM defined string
	5	Reports Country of Installation
	6	Reports data pump model and internal code revision
	7	Reserved
+GMI		Request Manufacturer Identification
+GMM		Request Model Identification
+GMR		Request Revision Identification
+GSN		Request Product Serial Number Identification
+GOI		Request Global Object Identification
+GCAP		Request Product Serial Number Identification
DTE-Modem Interface
En		Command Echo
	0	Disables command echo
	1 (default)	Enables command echo
Qn		Result Code Suppression
	0 (default)	Enables result codes to the DTE
	1	Disables result codes to the DTE
Vn		Modem Response Format
	0	Enables short-form (terse) result codes. Line feed is not issued before a short-form result code.
	1 (default)	Enables long-form (verbose) result codes
Xn		Result Code Selection and Call Progress Monitoring Control
	0	CONNECT result code is given upon entering online data state. Dial tone and busy detection are disabled.
	1	CONNECT <text> result code is given upon entering online data state. Dial tone and busy detection are disabled.
	2	CONNECT <text> result code is given upon entering online data state. Dial tone detection is enabled, and busy detection is disabled.
	3	CONNECT <text> result code is given upon entering online data state. Dial tone detection is disabled, and busy detection is enabled.
	4 (default)	CONNECT <text> result code is given upon entering online data state. Dial tone and busy detection are both enabled.
&Cn		RLSD Behavior
	0	RLSD is always ON
	1 (default)	RLSD follows the state of the carrier
&Dn		DTR Behavior
	0	Modem ignores DTR
	1	Upon an on-to-off transition of DTR, the modem enters online command state and issues an OK result code; the call remains connected
	2	Upon an on-to-off transition of DTR, the modem instructs the underlying modem to perform an orderly cleardown of the call. The disposition of any data in the modem pending transmission to the remote modem is controlled by the +ETBM parameter; otherwise, this data is sent before the call is cleared, unless the remote modem clears the call first (in which case pending data is discarded). The modem disconnects from the line. Automatic answer is disabled while DTR remains off.
*+IFC = n1,n2*		DTE-Modem Local Flow Control n1 specifies the method to be used by the DTE to control the flow of received data from the modem. n2 specifies the method to be used by the modem to control the flow of transmitted data from the DTE.
	n1 = 0	None
	n1 = 1	XON/XOFF on transmitted data (XON/XOFF on transmit data); do not pass XON/XOFF characters to the remote modem.
	n1 = 2 (default)	Circuit 133 (Ready for Receiving).
	n1 = 3	XON/XOFF on transmitted data with XON/XOFF characters being passed through to the remote modem in addition to being acted upon for local flow control
	n2 = 0	None
	n2 = 1	XON/XOFF on received data.
	n2 = 2 (default)	CTS/RTS
+ILRR = n		DTE-Modem Local Rate Reporting
	0	Disables reporting of local port rate (+ILRR: is not transmitted)
	1	Enables reporting of local port rate (+ILRR: is transmitted)
Dial Control
Dn		Dial
	0-9	DTMF digits 0 to 9.
	A-D	DTMF digits A, B, C, and D. Some countries may prohibit sending of these digits during dialing.
	L	Re-dial last number: the modem will re-dial the last valid telephone number. The L must be immediately after the D with all the following characters ignored).
	P	Select pulse dialing: pulse dial the numbers that follow until a "T" is encountered. Affects current and subsequent dialing. Some countries prevent changing dialing modes after the first digit is dialed.
	T	Select tone dialing: tone dial the numbers that follow until a "P" is encountered. Affects current and subsequent dialing. Some countries prevent changing dialing modes after the first digit is dialed.
	W	Wait for dial tone: the modem will wait for dial tone before dialing the digits following "W". If dial tone is not detected within the time specified by S7 (US) or S6 (W-class), the modem will abort the rest of the sequence, return on-hook, and generate an error message.
	*	The 'star' digit (tone dialing only).
	#	The 'gate' digit (tone dialing only).
	+
	!	Flash: the modem will go on-hook for a time defined by the value of S29. Country requirements may limit the time imposed.
	@	Wait for silence: the modem will wait for at least 5 seconds of silence in the call progress frequency band before continuing with the next dial string parameter. If the modem does not detect these 5 seconds of silence before the expiration of the call abort timer (S7), the modem will terminate the call attempt with a NO ANSWER message. If busy detection is enabled, the modem may terminate the call with the BUSY result code. If answer tone arrives during execution of this parameter, the modem will handshake.
	$	Wait for credit card dialing tone before continuing with the dial string. If the tone is not detected within the time specified by S7 (US models) or S6 (W-class models), the modem will abort the rest of the sequence, return on-hook, and generate an error message.
	&	Wait for credit card dialing tone before continuing with the dial string. If the tone is not detected within the time specified by S7 (US models) or S6 (W-class models), the modem will abort the rest of the sequence, return on-hook, and generate an error message.
	,	Dial pause: the modem will pause for a time specified by S8 before dialing the digits following ",".
	;	Return to command state. Added to the end of a dial string. This causes the modem to return to the command state after it processes the portion of the dial string preceding the ";". This allows the user to issue additional commands while remaining off-hook. The additional commands may be placed in the original command line following the ";" and/or may be entered on subsequent command lines. The modem will enter call progress only after an additional dial command is issued without the ";" terminator. Use "H" to abort the dial in progress, and go back on-hook.
	^	Toggles calling tone enable/disable: applicable to current dial attempt only.
	( )	Ignored: may be used to format the dial string.
	-	Ignored: may be used to format the dial string
	<space>	Ignored: may be used to format the dial string
T		Select Tone Dial
P		Select Pulse Dial
A		Answer
Hn		Hook Control
	0	The modem will release the line if the modem is currently on-line.
	1	If on-hook, the modem will go off-hook and remain in command mode.
On		Return to Online Data State
	0	Enters on-line data mode from the on-line command mode without a retrain. Handling is determined by the Call Establishment task. Generally, if a connection exists, this command connects the DTE back to the remote modem after an escape (+++).
	1	Performs a retrain then enters on-line data mode from the on-line command mode.
Ln		Monitor Speaker Loudness
	0	Off
	1 (default)	Low volume
	2	Medium volume
	3	High volume
Mn		Monitor Speaker Mode
	0	Speaker off
	1 (default)	Speaker on during call establishment, but off when receiving carrier
	2	Speaker on
	3	Speaker is off when receiving carrier and during dialing, but on during answering
&Gn		Select Guard Tone
	0 (default for U.S)	Disables guard tone
	1	Disables guard tone
	2 (default for W-Class)	Selects 1800 Hz guard tone
&Pn		Select Pulse Dial Make/Break Ratio
	0 (default)	Selects 39%-61% make/break ratio at 10 pulses per second.
	1	Selects 33%-67% make/break ratio at 10 pulses per second.
	2	Selects 39%-61% make/break ratio at 20 pulses per second.
	3	Selects 33%-67% make/break ratio at 20 pulses per second.
&V		Display Current Configuration
&W		Store Current Configuration
Modulation Control
+MS = n		Modulation Selection
	B103	For Bell 103
	B212	For Bell 212
	V21	For V.21
	V22	For V.22
	V22B	For V.22bis
	V23C	For V.23
	V32	For V.32
	V32B	For V.32bis
	V34	For V.34
	K56FLEX	For K56flex
	V90	For V.90
+MR = n		Modulation Reporting Control
	0	Disables reporting of modulation connection (+MCR: and +MRR: are not transmitted).
	1 (default)	Enables reporting of modulation connection (+MCR: and +MRR: are transmitted).
Error Control
+ES = n1,n2,n3		Error Control and Synchronous Mode Selection n1 specifies the initial requested mode of operation when the modem is operating as the originator. n2 specifies the acceptable fallback mode of operation when the modem is operating as the originator. n3 specifies the acceptable fallback mode of operation when the modem is operating as the answerer or specifies V.80 Synchronous Access Mode.
	n1 = 1	Initiate call with Normal Mode (also referred to as Buffered Mode or Direct Mode) only.
	n1 = 2	Initiate V.42 without Detection Phase. If V.8 is in use, disable V.42 Detection Phase.
	n1 = 3 (default)	Initiate V.42 with Detection Phase.
	n1 = 4	Initiate MNP.
	n1 = 6	Initiate V.80 Synchronous Access Mode when connection is completed, and Data State is entered.
	n2 = 0 (default)	LAPM, MNP, or Normal Mode error control optional.
	n2 = 2	LAPM or MNP error control required; disconnect if error control is not established.
	n2 = 3	LAPM error control required; disconnect if error control is not established.
	n2 = 4	MNP error control required; disconnect if error control is not established.
	n3 = 1	Error control disabled, use Normal Mode.
	n3 = 2 (default)	LAPM, MNP, or Normal Mode error control optional.
	n3 = 4	LAPM or MNP error control required; disconnect if error control is not established
	n3 = 5	LAPM error control required; disconnect if error control is not established.
	n3 = 6	MNP error control required; disconnect if error control is not established.
	n3 = 8	Initiate V.80 Synchronous Access Mode when connection is completed, and Data State is entered
+ER = n		Error Control Reporting
	0	Error control reporting disabled (no +ER intermediate result code transmitted).
	1 (default)	Error control reporting enabled (+ER intermediate result code transmitted).
Data Compression
+DS = n1,n2,n3,n4		Data Compression n1 specifies the desired direction(s) of operation of the data compression function; from the DTE point of view. n2 specifies whether or not the modem should continue to operate if the desired result is not obtained. n3 specifies the maximum number of dictionary entries (2048 entries) which should be negotiated (may be used by the DTE to limit the codeword size transmitted, based on its knowledge of the nature of the data to be transmitted). n4 specifies the maximum string length (32 bytes) to be negotiated (V.42bis P2).
	n1 = 0	Negotiated; no compression (V.42bis P0=0).
	n1 = 3 (default)	both directions, accept any direction (V.42bis P0=11).
	n2 = 0	Do not disconnect if V.42bis is not negotiated by the remote modem as specified in <direction>.
+DR = n		Data Compression Reporting
	0	Data compression reporting disabled (no +DR result code transmitted).
	1 (default)	Data compression reporting enabled (+DR result code transmitted).
%En		Enable/Disable Line Quality Monitor and Auto-Retrain
	0	Disable line quality monitor, auto-retrain, and auto-rate renegotiation.
	1 (default)	Enable line quality monitor, auto-retrain, and auto-rate renegotiation.
V.8 and V.8 bis
+A8E = n1,n2,n3,n4,n5,n6		V.8 and V.8bis Operation Control n1 denotes decimal number which enables/disables issuance of +A8x indications during modem-controlled V.8 origination negotiation n2 denotes decimal number which enables/disables issuance of +A8x indications during modem-controlled V.8 answer negotiation. n3 set the V.8 CI signal call function to the hexadecimal octet value X. n4 denotes decimal number which enables/disables V.8bis negotiation. n5 is a "<string of values>", applicable only for n2 = 5 (not supported). n6 is a "<string of values>", applicable only for n2 = 5 (not supported).
	n1 = 1	Enable DCE-controlled V.8 origination negotiation without +A8x indications.
	n1 = 6 (default)	Enable DCE-controlled V.8 origination negotiation with +A8x indications.
	n2 = 1 (default)	Enable DCE-controlled V.8 answer negotiation without +A8x indications.
	n2 = 5	Enable DCE-controlled V.8 answer negotiation with +A8x indications.
	n4 = 0 (default)	Disable V.8bis negotiation.
	n4 = 1	Enable DCE-controlled V.8bis negotiation.
	n4 = 2	Enable DTE-controlled V.8bis negotiation.
World-Class
+GCI?		Country of Installation
DSVD Control
-SSE = n		Enable/Disable DSVD
	0 (default)	Disable DSVD.
	1	Enable DSVD. A modem not supporting DSVD will respond with ERROR.
Fax Commands
+FAE = n		Data/fax Auto Answer
	0 (default)	Disable data/fax auto answer mode.
	1	Enable data/fax auto answer mode. The modem determines the calling type and issues DATA result code (13) if the caller is a data modem or issues FAX result code (15) if the caller is a fax modem.
S-Parameters
S0		Automatic Answer
S1		Ring Counter
S2		Escape Character
S3		Command Line Termination Character
S4		Response Formatting Character
S5		Command Line Editing Character
S6		Pause Before Blind Dialing
S7		Connection Completion Timeout
S8		Comma Dial Modifier Time
S10		Automatic Disconnect Delay
S11		DTMF Tone Duration
S12		Escape Prompt Delay (EPD)
S29		Flash Dial Modifier Time
Voice Commands
+FCLASS = n		Configuration Commands
	8	Select Voice Mode
	80	Select VoiceView Mode
+VIT = n		Voice Inactivity Timer (DTE/Modem)
	0-255	n corresponds to the time in units of 1.0 second. A value of 0 disables the timer.
+VLS = n		Analog Source/Destination Selection
	0	Modem on-hook. Local phone connected to the line.
	1	Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	2	Modem on-hook and connected to the Local phone.
	3	Modem off-hook and connected to the line and Local phone.
	4	Internal Speaker connected to the Modem. Modem on-hook. Local phone connected to the line.
	5	Internal Speaker connected to the line. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	6	Internal Microphone connected to the Modem. Modem on-hook. Local phone connected to the line.
	7	Internal Microphone and Internal Speaker connected to the line. Squelching active. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	8	External Speaker connected to the Modem. Modem on-hook. Local phone connected to the line.
	9	External Speaker connected to the line. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	10	Internal Microphone and External Speaker connected to the line. Squelching active. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	11	External Microphone connected to the Modem. Modem on-hook. Local phone connected to the line.
	12	Internal Microphone and Internal Speaker connected to the line. Squelching active. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	13	External Microphone and External Speaker connected to the line. Squelching active. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	14	External Microphone and Speaker combination (handset or headset) connected to the Modem. Modem on-hook. Local phone connected to the line.
	15	External Microphone and Speaker combination (handset or headset) connected to the line. Modem off-hook and connected to the line. Local phone provided with power to detect hook condition.
	16 or 30	Mute Speakerphone Microphone.
	17 or 31	Unmute Speakerphone Microphone.
	18 or 32	Mute Speakerphone Speaker.
	19 or 33	Unmute Speakerphone Speaker.
	128	Modem on-hook, local phone connected to the line, external speaker connected to the modem. Caller ID relay output active.
	129	Modem off-hook, local phone connected to the line, MIC_M routed to TXA. Typically used for music during handset conversation. Do not use this mode to answer incoming ring.
	130	Modem off-hook, local phone disconnected from the line, MIC_M routed to TXA. Typically used to play greeting from audio codec.
	131	Modem off-hook, local phone connected to the line, external speaker connected to the line. Typically used for recording a handset conversation through a sound card.
+VRN = n		Ringback Never Appeared Timer
	0-60	n denotes a decimal number specifying the time period, in units of 1.0 second, that the modem will wait for Ringback during call origination. A value of 0 forces the modem to report the OK result code immediately after dialling. The range is 1 to 60 seconds for n = 1 to 60.
+VSD = n1, n2		Silence Detection (Quiet and Silence)
	n1 = 0	Use +VSM silence compression setting and algorithm for long-term silence detection (if +VSM is in use) or proprietary silence compression setting and algorithm for long-term silence detection (if +VSM is not in use).
	n1 = 127	Sets less aggressive long-term silence detection independent of presence or use of silence compression.
	n1 = 128	Sets normal long-term silence detection independent of presence or use of silence compression.
	n1 = 129	Sets more aggressive long-term silence detection independent of presence or use of silence compression.
	n2 = 0-255	n denotes a decimal number specifying the required period of silence, in units of 0.1 second, before the modem can report silence detected at the end of a voice receive either with the "Presumed End of Message" (QUIT) or "Presumed Hangup (SILENCE) event reports. A value of 0 disables the modem silence detection. The range is 0.1 to 25.5 seconds for n = 1 to 255.
+VSM = n1, n2, n3, n4		Compression Method Selection
	n1 = 1, 128 to 133	n denotes the decimal number identifying the compression method.
	n2 = 7200 or 8000	n2 denotes the range of values containing the supported range of voice samples per second of the analog signal.
	n3 = 0	n3 denotes the range of values containing the supported range of sensitivity settings for voice receives.
	n4 = 0	n4 denotes the range of values containing the supported range of expansion values for voice transmits.
+VDT = n1, n2		Control Tone Cadence Reporting
	n1 = 0	The modem will not produce any control tone cadence report.
	n1 = 1	The modem will produce control tone cadence report as specified for the n2 subparameter.
	n2 = 0	The modem will produce only CPOF and CPON messages.
	n2 = other	Reserved.
Speakerphone Commands
+VSP = n		Speakerphone ON/OFF
	0	OFF
	1	ON
+VGM = n		Microphone Gain
	0-255	n denotes a decimal number corresponding to the gain.
+VGS = n		Speaker Gain
	0-255	n denotes a decimal number corresponding to the gain.

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