101 | Multi-Tech Systems MT2834MR6 instruction

			Appendix


#Fn	n = 0, 1, or 2	Fallback Modes When Online
		#F0	No fallback when online.
		#F1	Fall back incrementally from maximum speed to 4800 bps.
	***	#F2	Fall back incrementally to 4800 bps, fall forward when line improves.
&Gn	n = 0, 1, or 2	Guard Tones (International model only)
	***	&G0	Turn off ITU-T guard tones.
		&G1	Turn on ITU-T 550 Hz guard tone.
		&G2	Turn on ITU-T 1800 Hz guard tone.

Note:The U.K. model is locked to &G2, which turns on the ITU-T 1800 Hz guard tone.

Hn	n = 0 or 1	On-Hook/Off-Hook
		H0	Go on-hook (hang up).
		H1	Go off-hook.
*Hn	n = 0 or 1	Busy-Out After Disconnect
	***	*H0	Disable busy-out after disconnect.
		*H1	Enable busy-out after disconnect.
In	n = 0, 1, 2,	Inquire Product Codes
	or 5	I0	Request modem ID #.
		I1	Request firmware revision #.
		I2	Request modem description.
		I5	Request DSP version.
#Ix	x = password	Enter Login Password
		Password is case sensitive.
#I=x	x = password	Store Login Password
		Password must be 6–10 characters long, and may consist of any keyboard charac-
		ters.
Ln	n = 0, 5–11	List Commands
		L	List stored telephone numbers.
		L5	List current operating parameters.
		L6	List current S-register values.
		L7	List additional parameters.
		L8	List online diagnostic parameters.
		L9	List line probe signal strength data.

L10 List line probe signal to noise ratio.

L11 List line probe noise data.

Note: To use L9, L10, or L11 when online, you must first escape to command mode by typing +++ATLn<CR> (for n type 9, 10, or 11). Type ATO to return on line.

#Ln	n = 0, 1, 2,	V.42 Error Correction Mode
	3, or 8	*** #L0	Modems negotiate V.42 mode.
		#L1	MNP on and LAP-M off (originate mode only).
		#L2	LAP-M on and MNP off (originate mode only).
		#L3	Disable detection phase and go directly to LAP-M.

Mn	n = 0, 1, 2,
	or 3

Modem Speaker Control

M0 Modem speaker always off.

***M1 Modem speaker on until carrier signal detected.

M2 Modem speaker always on.

M3 Monitor speaker on during dialing, off during handshaking.

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Multi-Tech Systems MT2834MR6 manual 101

Contents

User Guide Trademarks Revision Date Description Contents Registers Warranty & Service Index 116 Introduction Manual Organization Introduction Description FCC Regulations for Telephone Line Interconnection FCC Fax Update Canadian Limitations Notice Technical Specifications Bell 103/113 Diagnostics300 bps Fax Carrier Power Supply Busy Switch Modem LED IndicatorsSpeed Data Rate bps LED State Safety Warnings 10 MT2834MR6 Installation Notes Dialing and Answering Dial-Up Handshaking Details Dial-Up Automatic Answering Call Termination AT Commands Modes of Operation Working with AT Commands Command Editing Command Structure AT Commands Flow control disabled Baud adjustModem baud rate Serial port baud rate Alternate out-of-band escape sequence Force answer modeEscape sequence selection Go back online Default none Dialing CommandsDial = phone number Default P Dial Modifier CommandsDefault R0 Pulse or Tone Dialing Or 4 through 255 seconds International models ATDT1028806127853500 $123456789 NdNe Number Linking = 0 or = 1 or Default none Phone Number Memory Commands P9,T14089876543 T14082345678 Default &W1 Configuration Storage and Recall CommandsDefault &F8 = 0, 8, or ATZ AT&W1 defaultAT&F8&W0 AT&F9&W0 Modem Response Result Code Commands Result Codes and Call Progress Selection DefaultDefault &A0 #An Auto Speed Detection Default #A0 Online Connection CommandsDefault B0 DCn AT Command Control = 0 or Default %DC0 #Fn Fallback Modes = 0, 1, or Default #F2 CDn Cleardown at Disconnect = 0 or Default &CD0DTn Dtmf Detection = 0 or Default DT0 Default *H0 Default &G0 models outside U.KDefault &P0 Models outside U.K G2 U.K. models only #T1 enables TCM #T0 disables TCMDefault Y0 Issued V.34 Commands Default &C1 RS-232 Interface CommandsDefault &D2 Default &R1 Go high again Default &S1S0 forces DSR high S1 allows DSR to act normally, that is, to follow CD Default &E1 Error Correction and Data Compression CommandsDefault &E15 #Ln Error Correction Modes Default #L0 $Rn Retransmit Count = 0 or Default $R0 $En Error Correction at 300 bps = 0 or Default $E0$An Autoreliable Buffering = 0 or Default $A0 Speed Conversion Commands $SB300 $SBn Serial Port Baud Rate = speed Default $SB57600$SB1200 $SB2400 Immediate Action Commands Rate Renegotiation BSn Maximum Reliable Block Size = 0 or Default &BS1 Flow Control Commands$EBn Asynchronous Word Length = 0 or Default $EB0 Flow Control Disable Default &E8 Default &E6Non-Error Correction Mode Flow Control Default &E10 #Xn Number of Xoff Characters Sent = 0 or Default #X0 Default &E13Pacing Computer-Initiated Flow Control = 12 or Escape Sequences Atcr Remote Configuration Escape Sequence Remote Configuration Commands Line Probe Commands Diagnostic Commands Registers Registers Default 10 J Default 13 MDefault 8 H Return Character Default 45 North America and International Time for Carrier Abort TimerUnit 1 second Range 1-255 U.S.A Maximum S11 value is 255 ms 255 units Registers Registers Examples of Reading Values Reading and Assigning S-Register ValuesExamples of Assigning Values AT Commands Affecting S-Registers Error Correction, Data Compression & Speed Conversion Error Correction, Data Compression, and Speed Conversion How V.42 Detects and Corrects Errors MNP Classes Data Compression 1 #L0 Command V.42 Mode Select Command #L2 #L1 Command 3 #L2 Command Reliable Mode &E2 Non-Error Correction Mode &E0Autoreliable Mode &E1 Modes of Operation Flow control and pacing Flow Control Hardware Flow Control &E4 Modem-Initiated Flow Control1 XON/XOFF Flow Control &E5 Pacing &E13 Non-Error Correction Mode Flow Control &E10 and &E111 XON/XOFF Pass-Through &E7 Hewlett Packard ENQ/ACK Pacing &E9 Non-Error Correction Mode Flow Control 10.1 V.42 Error Correction ModesModem-Initiated Flow Control 10.3 XON/XOFF Pass-Through LAP-M Error Correction MNP Error CorrectionResult Codes Speed Conversion Modem Baud Rate $MB Baud Adjust $BA Serial Port Baud Rate $SB Autoreliable Buffering $A Related CommandsMaximum Block Size &BS Autoreliable Fallback Character $F Retransmit Count $R 13.5 V.42 Error Correction at 300 bps $ESummary Testing & Troubleshooting Testing and Troubleshooting Local Analog Loopback Test V.54 Loop Test Procedure Remote digital loopback test Remote Digital Loopback Test V.54 Loop Local digital loopback test Local Digital Loopback Test V.54 Loop Warranty & Service 2 U.S. and Canadian Customers Multi-Tech Systems, Inc. Warranty & Repairs PoliciesWarranty International Distributors International Customers outside U.S.A. and Canada Repairs Repair Procedures for U.S. and Canadian CustomersRepair Procedures for International Customers Country Telephone Technical SupportInternet Site Appendices Appendix a Ascii Conversion Chart Dial Pulses Appendix B Figure B-2. Standard Dtmf frequencies Tone Dial Frequencies Result Code Summary Appendix C Standard AT Result Codes &Q1 Register Summary Register Unit Range Default DescriptionAppendix D S34 Appendix E AT Command SummaryCommand Values Description CDn 100 101 102 103 104 105 Appendix F RS-232C Interface SpecificationsSignal Information Negative Positive Transmitted Data TD Pin 2 To modem Functional Description of the RS-232C Signals Test Voltage +V Pin From modem External Transmit Clock XTC Pin To modem Appendix G Cable and Connector Diagrams Introduction to MultiTech Escape Methods Appendix H Escape Method 1 +++ATCR How to Select an Escape Method Aborting an Escape Sequence Registers and Escape Sequence Setup Introduction to Remote ConfigurationBasic Procedure Changing the Remote Escape Character Changing the Passwords Index Index 118 119 120 121 122 S000326A