Multi-Tech Systems MT5634MSV manual Modem Does Not Respond to Commands

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6 Solving Problems

The Modem Does Not Respond to Commands

Make sure the modem is plugged in and turned on. (See “None of the Indicators

4Light.”)

Make sure you are issuing the modem commands from the data communications software, either manually in terminal mode or automatically by configuring the

4software. (You cannot send commands to the modem from the DOS prompt.)

Make sure you are in terminal mode in your data communications program, then type AT and press ENTER. If you get an OK response, your connections are good and the problem likely is in the connection setup in your communications soft-

4ware.

Try resetting your modem by turning it off and on. If you are using DOS or Win- dows 3.1 communications software, make sure the initialization string includes &F as the first command, to cancel any “leftover’ command that could affect the

4modem’s operation.

If you don’t get an OK, the problem may still be in the communications software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communications programs connect to the COM port automat- ically. Some connect when the software loads and remain connected until the program terminates. Others can disconnect without exiting the program. The modem’s TR indicator lights to show that the software has taken control of the

4modem through the COM port.

Your communications software settings may not match the physical port the mo- dem is connected to. The serial cable might be plugged into the wrong connector—check your computer documentation to make sure. Or you might have selected a COM port in your software other than the one the modem is physically connected to—compare the settings in your software to the physical

4connection.

If the modem is on, the cable is plugged into the correct port, the communica- tions software is configured correctly, and you still don’t get an OK, the fault

4might be in the serial cable. Make sure it is firmly connected at both ends.

Is this the first time you have used the cable? If so, it may not be wired correctly. Check the cable description on the packaging to make sure the cable is the right

4one for your computer.

Peripheral expansion cards, such as sound and game cards, might include a seri- al port preconfigured as COM1 or COM2. The extra serial port, or the card itself, may use the same COM port, memory address, or interrupt request (IRQ) as your communications port. Be sure to disable any unused ports.

To look for address or IRQ conflicts if you use Windows 3.1x, select File Run in Program Manager, type MSD, and press ENTER. Then select Mouse, COM Ports, and IRQ Status and note the addresses and IRQs that are in use. If you find an IRQ conflict, note which IRQs are not being used, then change one of the conflicting devices to use one of the unused IRQs. If you find an address conflict, change the address of one of the conflicting devices.

To change a port address or IRQ in Windows 3.1x, double-click the Control Panel icon, then the Ports icon. Click on the port you want to change, click Settings,

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Contents User Guide FCC Part User Guide Record of Revisions Quick Start IntroductionMessageSaver Operation Remote Configuration AT Commands, S-Registers & Result CodesSolving Problems PhoneToolsAppendix C Loopback Tests Appendix a Regulatory ComplianceAppendix E Upgrade Procedures Appendix D Warranty, Service, and Technical SupportIntroduction Introduction Product Description How to Get a Copy of Your User Guide Related Manuals What Is in Your Modem Package?MessageSaver User Guide Quick Start Introduction Safety WarningsWhat You Will Need We supplySelect Stereo or Mono Speaker Mount the FeetOpening the Modem Location of speaker jumper Changing the Speaker JumperRS232 Connection Connect the Modem to Your SystemLine Connection Power-On Test Power ConnectionPhone Connection Microphone ConnectionAdding the Modem to Windows Install the Modem in WindowsRemoving Your Old Modem from Windows Install and Configure Your Software Call the Multi-Tech BBS Windows HyperTerminal Windows Terminal Microsoft Fax Send a FaxReferences Select Start Programs Accessories Fax Compose new faxMessageSaver User Guide MessageSaver Operation Independent Mode Functions PhoneTools FeaturesMessageSaver Operation Recording and Downloading an AnnouncementIndependent Mode Configuration Dialog Box Independent Mode Operation in PhoneToolsIndependent Mode Control dialog box Independent Mode Control Dialog BoxControl Buttons Independent Mode Operation Using the Front PanelIndicator Lights Answering a Call with the Speakerphone Adjusting Speaker VolumePlaying Voice Messages Stopping the Play of Voice MessagesUsing the MessageSaver in Speakerphone Mode Remote ControlControlling the MessageSaver Remotely Remote Control Keys Activating Independent Mode RemotelyAT Commands Registers Result Codes AT Commands AT Command Summary DS=y Dial Stored Telephone Number Echo Command Mode CharactersEcho Online Data Characters Hook ControlMonitor Speaker Mode Monitor Speaker VolumeReturn Online to Data Mode Modulation HandshakeSet Register Value Result Codes Enable/DisableSr? Read Register Value Tone DialingLong Space Disconnect Modem ResetAuto Retrain Data Carrier Detect DCD ControlCommunications Mode Load Factory SettingsAsynchronous Communications Mode 22bis Guard Tone ControlDisplay Current Settings Test CommandsStore Current Configuration Select Stored Configuration for Hard Reset\Bn Transmit Break \An\Gn Modem Port Flow Control \Jn Data Buffer Control\Tn Inactivity Timer \Nn Error Correction Mode Selection\Qn Flow Control Selection \Vn Protocol Result Code DCn AT Command Control\Xn XON/XOFF Pass-Through Data Calling Tone#Sx Enter Setup Password Command +ES=n Enable Synchronous Buffered Mode#S=x Store Setup Password Command +++ATCR Escape SequenceRegisters Register Unit Range Default DescriptionRegister Unit Range Default Description S37 Register Unit Range Default Description S42 Terse Verbose Description Result CodesBlacklist Full Remote Configuration Setup Basic ProcedureChanging the Setup Password Changing the Remote Escape Character MessageSaver User Guide Solving Problems None of the Indicators Light Modem Does Not Respond to Commands Modem Dials But Cannot Connect Modem4Disconnects While Online File Transfer4Is Slower Than It Should Be Modem4Cannot Connect When AnsweringData Is Being Lost Modem4Doesn’t Work with Caller ID There Are Garbage4 Characters on the MonitorFax and Data4Software Can’t Run at the Same Time MessageSaver User Guide PhoneTools Installing PhoneTools Phone Module Using PhoneTools’ Status BarMaking a Phone Call Making Quick Dial Entries Using the SpeakerphoneVoice Module Setting up AnswerphoneActivating and Deactivating Answerphone Setting Up the Answer/Record Mode Setting Up the Answer Only ModeListening to Received Messages in PhoneTools Listening to Received Messages from a Remote PhoneChanging Recording Parameters Recording an AnnouncementConfiguring and Controlling Independent Mode Operation Independent ModeHow Does It Work? Selecting an Announcement Activating and Configuring Independent ModeManaging Stored Documents Inbox Independent ModeFaxing a Document from a Windows Application Fax ModuleSending a Cover Faxing a File Directly from PhoneToolsViewing and Printing Faxes Adding a Logo to the CoverInbox Management Inbox and Outbox ManagementOutbox Management Creating New Records Phone BookImporting Existing Records Selecting RecordsUsing the Phone Book for Dialing Starting a Modem Connection Terminal Emulation ModuleCapturing Information to Disk Uploading Files to a Remote SystemSending a Data File Automatically Data File TransferReceiving a Data File Automatically Appendixes FCC Part 68 Telecom Appendix a Regulatory ComplianceRegulatory Compliance Fax Branding StatementInternational Modem Restrictions Canadian Limitations NoticeCommission Decision CTR21 New Zealand Telecom Warning Notice EMC and Safety ComplianceMessageSaver User Guide Appendix B Technical Specifications Carrier Frequencies Frequency Stability MessageSaver User Guide Local Analog Loopback Test V.54 Loop Test procedureFigure 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 LoopMessageSaver User Guide Service Limited WarrantyTechnical Support Online Warranty RegistrationMulti-Tech BBS About the Internet About the Multi-Tech Fax-Back Service Modem AccessoriesSupplyNet Online Ordering Instructions Identify the Modem Firmware Upgrade OverviewMulti-Tech Web Site Identify the Current Firmware VersionMulti-Tech BBS Extract the Upgrade Files Download the Upgrade FileClear Your Stored Paramenters Restore Your Parameters Upgrade the Modem’s FirmwareIndex Symbols Index 106
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