Multi-Tech Systems MT5600BL 22bis Guard Tone Control, Flow Control Selection, Communications Mode

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		4 AT Commands, S-Registers, and Result Codes
Command:	&Gn		V.22bis Guard Tone Control
Values:			n = 0, 1, or 2
Default:			0 (North America), 2 (elsewhere)
Description:	&G0		Disables guard tone.
	&G1		Sets guard tone to 550 Hz.
	&G2		Sets guard tone to 1800 Hz.

			Note: The &G command is not used in North America, and
			may not be permitted in some countries.

Command:	&Kn		Flow Control Selection
Values:			n = 0, 3, 4, 5, or 6
Defaults:			3 (data modem mode)
			6 (fax modem and voice modes)
Description:	&K0		Disables flow control.
	&K3	Enables CTS/RTS hardware flow control.
	&K4	Enables XON/XOFF software flow control.
	&K5	Enables transparent XON/XOFF flow control.
	&K6	Enables both RTS/CTS and XON/XOFF flow control.

			Note: See also the &E command

Command:	&Mn		Communications Mode
Values:			n = 0–3
Default:		0
Description:			This command determines the DTR operating mode. The mo-
			dem treats the &M command as a subset of the &Q command.
	&M0		Selects direct asynchronous operation. Note that the command
			sequence &M0\N0 selects normal buffered mode, but the
			command sequence \N0&M0 selects direct mode. This is be-
			cause the \N0 command is analogous to the &Q6 command.
	&M1		Selects synchronous connect mode with asynchronous offline
			command mode.
	&M2		Selects synchronous connect mode with asynchronous offline
			command mode. Same as &M1 except that &M2 enables DTR
			dialing of directory slot 3. The modem disconnects if DTR is
			low for more than the period stored in S25.
	&M3		Selects synchronous connect mode. This mode allows DTR to
			act as a talk/data switch. The call is manually initiated while
			DTR is inactive. When DTR becomes active, the handshake
			proceeds in originate or answer mode according to S14 bit 7.

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Contents Model MT5600BA Model MT5600BL Record of Revisions FCC Part MultiModemII User Guide Using the Front PanelIntroduction Quick StartCallback Security AT Commands, S-Registers & Result CodesRemote Configuration Solving ProblemsAppendix E Upgrading the Modem Appendix D Warranty, Service, and Technical SupportAppendix a Regulatory Compliance Appendix C Loopback TestsContents Viii Introduction Product Description FeaturesIntroduction Data IntroductionRelated Manuals What Is in Your Modem Package?Quick Start You supply Safety WarningsWhat You Will Need We supplyQuick Start Connect the Modem to Your SystemRS232 Connection Dialup ConnectionPower-On Test Two-Wire Leased Line ConnectionFour-Wire Leased Line Connection Power ConnectionRemoving Your Old Modem from Windows Install the Modem in WindowsAdding the Modem to Windows Install and Configure Your Software Trio DataComm Call the Multi-Tech BBSWindows HyperTerminal Windows Terminal Microsoft Fax Send a FaxTrio Fax References Select Start Programs Accessories Fax Compose new faxMultiModemII User Guide Using the Front Panel LED Indicators Modem ConfigurationMenu Structure Using the Front PanelLiquid Crystal Display LCD Option SelectionMultiModemII User Guide Menu Overview Using the Front Panel Status Trunk MultiModemII User Guide Basic Options Trunk Using the Front Panel Advanced Options Trunk Diagnostic Options Trunk MultiModemII User Guide Remote Configuration Options TrunkCaller ID Options Trunk Using the Front Panel Phone Number Memory Options TrunkStatus Menu OptionsUsing the Front Panel Basic Options Implemented Advanced OptionsRemote Configuration Options Caller ID Options MultiModemII User Guide Diagnostic OptionsPhone Number Memory Options AT Commands Registers Result Codes Introduction AT Commands, S-Registers, and Result Codes AT CommandsInformation Request Echo Command Mode CharactersDS= y Dial Stored Telephone Number Hook ControlResult Codes Enable/Disable Monitor Speaker VolumeMonitor Speaker Mode Return Online to Data ModeTone Dialing Select RegisterSet Register Value Read Register ValueData Carrier Detect DCD Control Modem ResetResult Code Selection Long Space DisconnectModem-Initiated Flow Control Error Correction ModesLoad Factory Settings Data Terminal Ready DTR ControlFlow Control Selection Communications Mode22bis Guard Tone Control Data Set Ready DSR Control Sync/Async ModeTest Commands Clear to Send CTS ControlSynchronous Clock Source Display Current ConfigurationStore Current Configuration Display Last Connection StatisticsData Compression Control Select Profile for Hard ResetLine Signal Level Zy =x Store Telephone Number\Bn Transmit Break Line Signal QualityPCM Code Selection \An Maximum MNP Block Size\Vn Single Line Connect Message \Nn Error Correction Mode SelectionReserved,maxTXrateCR +MS= Modulation SelectionMNP Extended Services Flash Memory Download Command -SDR=nDistinctive Ring ControlCommand #CBNy=x Store Callback Number Command #CBPy=x Store Callback PasswordEscape Sequence Command #CID= n Caller IDCallback Enable/Disable Command $SBn Serial Port Baud RateRegisters Register Unit Range Default DescriptionS32 S36 S46 Terse Verbose Description Result CodesProtocol ALT +FCERROR MultiModemII User Guide Remote Configuration Changing the Remote Configuration Password Basic ProcedureSetup Changing the Remote Escape Character Remote ConfigurationMultiModemII User Guide Callback Security Turning Callback Security On and Off Setup ProceduresCallback Security Assigning Callback PasswordsAssigning Callback Phone Numbers Command #CBN y= x Store Callback Number Calling ProcedureCallback Security Commands Command #CBPy=x Store Callback Password Callback Assignments MultiModemII User Guide Leased Line Operation Two-Wire Setup Leased Line Operation Four-Wire SetupDial Backup and Leased Line Restoral Setup Dial Backup and Leased Line RestoralLeased Line Operation MultiModemII User Guide Solving Problems None of the Indicators Light Solving Problems Modem Does Not Respond to CommandsModem Dials But Cannot Connect Modem4Disconnects While Online File Transfer4Is Slower Than It Should Be Modem4Cannot Connect When AnsweringModem4Doesn’t Work with Caller ID Data Is Being LostThere Are Garbage4 Characters on the Monitor Fax and Data4Software Can’t Run at the Same Time Appendixes FCC Part 68 Telecom Appendix a Regulatory ComplianceRegulatory Compliance Fax Branding StatementCommission Decision CTR21 Canadian Limitations NoticeInternational Modem Restrictions New Zealand Telecom Warning Notice EMC, Safety, and Terminal Directive ComplianceAppendix B Technical Specifications Technical Specifications Receiver Sensitivity Loopback Tests Test procedureLocal Analog Loopback Test V.54 Loop Figure C-2. Remote digital loopback test Remote Digital Loopback Test V.54 LoopFigure C-3. Local digital loopback test Local Digital Loopback Test V.54 LoopBack-to-Back Test Figure C-5. Back-to-back test connections Service Limited WarrantyMulti-Tech BBS Online Warranty RegistrationWarranty, Service, and Technical Support Technical SupportAbout the Internet SupplyNet Online Ordering Instructions Ordering Modem AccessoriesIdentify the Modem Firmware Upgrade OverviewUpgrading the Modem Identify the Current Firmware VersionMulti-Tech Web Site Multi-Tech BBSSet the Modem to the Factory Defaults Download the Upgrade FileExtract the Upgrade Files Restore Your Parameters Upgrade the Modem’s FirmwareRS-232 Pinouts Appendix F Cable PinoutsCable Pinouts Leased Line PinoutsCtrl Code Hex Dec Appendix G Ascii Character MapIndex 108 Index 110

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