Multi-Tech Systems MT5600BA, MT5600BL manual Modem Dials But Cannot Connect

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MultiModemII User Guide

click Advanced, and select the new port address and/or interrupt. If you wish to use COM3 or COM4, note that COM3 shares an IRQ with COM1, as does COM4 with COM2, so you should change their IRQs to unused ones, if possible.

Windows 9x: Right-click on My Computer, select Properties from the menu, click on the Device Manager tab, double-click on Ports, then double-click on the communication port your modem is connected to. In the port’s Properties sheet, click on the Resources tab to see the port’s input/output range and interrupt re- quest. If another device is using the same address range or IRQ, it appears in the Conflicting Device List. Uncheck Use automatic settings to change the port’s settings so they do not conflict with the other device, or select the port the con- flicting device is on and change it instead. If you need to open your computer to change switches or jumpers on the conflicting device; refer to the device’s docu- mentation.

Windows NT 4.0: To look for address or IRQ conflicts, click Start, Programs, Ad- ministrative Tools (Common), and Windows NT Diagnostics. In the Windows NT Diagnostics dialog box, click the Resources tab to see which input/output ranges and interrupt requests are in use. If you need to open your computer to change switches or jumpers on the conflicting device; refer to the device’s docu- mentation.

The serial port might be defective. If you have another serial port, install the mo-

4dem on it, change the COM port setting in your software, and try again.

The modem might be defective. If you have another Multi-Tech modem, try swapping modems. If the problem goes away, the first modem is possibly defec- tive. Call Technical Support for assistance (see Appendix D).

The Modem Dials But Cannot Connect

There can be several reasons the modem fails to make a connection. Possibilities include:

•lack of a physical connection to the telephone line.

•a wrong dial tone.

•a busy signal.

•a wrong number.

•no modem at the other end.

•a faulty modem, computer, or software at the other end.

•incompatibility between modems.

You can narrow the list of possibilities by using extended result codes. Extended re- sult codes are enabled by default. If they have been disabled, include V1X4 in the modem’s initialization string, or in terminal mode enter ATV1X4 and press ENTER. When4you dial again, the modem reports the call’s progress.

If the modem reports NO DIALTONE, check that the modem’s telephone line ca- ble is connected to both the modem’s LINE jack (not the PHONE jack) and the telephone wall jack. If the cable looks secure, try replacing it. If that doesn’t work, the problem might be in your building’s telephone installation. To test the building installation, plug a telephone into your modem’s telephone wall jack and listen for a dial tone. If you hear a dial tone, your modem might be installed

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Contents Model MT5600BA Model MT5600BL Record of Revisions FCC Part Quick Start Using the Front PanelIntroduction MultiModemII User GuideSolving Problems AT Commands, S-Registers & Result CodesRemote Configuration Callback SecurityAppendix C Loopback Tests Appendix D Warranty, Service, and Technical SupportAppendix a Regulatory Compliance Appendix E Upgrading the ModemContents Viii Introduction Product Description FeaturesIntroduction Introduction DataWhat Is in Your Modem Package? Related ManualsQuick Start We supply Safety WarningsWhat You Will Need You supplyDialup Connection Connect the Modem to Your SystemRS232 Connection Quick StartPower Connection Two-Wire Leased Line ConnectionFour-Wire Leased Line Connection Power-On TestRemoving Your Old Modem from Windows Install the Modem in WindowsAdding the Modem to Windows Install and Configure Your Software Call the Multi-Tech BBS Trio DataCommWindows HyperTerminal Windows Terminal Microsoft Fax Send a FaxTrio Fax Select Start Programs Accessories Fax Compose new fax ReferencesMultiModemII User Guide Using the Front Panel Modem Configuration LED IndicatorsOption Selection Using the Front PanelLiquid Crystal Display LCD Menu StructureMultiModemII User Guide Menu Overview Using the Front Panel Status Trunk MultiModemII User Guide Basic Options Trunk Using the Front Panel Advanced Options Trunk MultiModemII User Guide Remote Configuration Options Trunk Diagnostic Options TrunkUsing the Front Panel Phone Number Memory Options Trunk Caller ID Options TrunkMenu Options StatusUsing the Front Panel Basic Options Advanced Options ImplementedRemote Configuration Options Caller ID Options MultiModemII User Guide Diagnostic OptionsPhone Number Memory Options AT Commands Registers Result Codes Introduction AT Commands AT Commands, S-Registers, and Result CodesHook Control Echo Command Mode CharactersDS= y Dial Stored Telephone Number Information RequestReturn Online to Data Mode Monitor Speaker VolumeMonitor Speaker Mode Result Codes Enable/DisableRead Register Value Select RegisterSet Register Value Tone DialingLong Space Disconnect Modem ResetResult Code Selection Data Carrier Detect DCD ControlData Terminal Ready DTR Control Error Correction ModesLoad Factory Settings Modem-Initiated Flow ControlFlow Control Selection Communications Mode22bis Guard Tone Control Clear to Send CTS Control Sync/Async ModeTest Commands Data Set Ready DSR ControlDisplay Last Connection Statistics Display Current ConfigurationStore Current Configuration Synchronous Clock SourceZy =x Store Telephone Number Select Profile for Hard ResetLine Signal Level Data Compression Control\An Maximum MNP Block Size Line Signal QualityPCM Code Selection \Bn Transmit Break\Nn Error Correction Mode Selection \Vn Single Line Connect Message+MS= Modulation Selection Reserved,maxTXrateCRMNP Extended Services Command #CBPy=x Store Callback Password Command -SDR=nDistinctive Ring ControlCommand #CBNy=x Store Callback Number Flash Memory DownloadCommand $SBn Serial Port Baud Rate Command #CID= n Caller IDCallback Enable/Disable Escape SequenceRegister Unit Range Default Description RegistersS32 S36 S46 Result Codes Terse Verbose DescriptionProtocol ALT +FCERROR MultiModemII User Guide Remote Configuration Changing the Remote Configuration Password Basic ProcedureSetup Remote Configuration Changing the Remote Escape CharacterMultiModemII User Guide Callback Security Setup Procedures Turning Callback Security On and OffAssigning Callback Passwords Callback SecurityAssigning 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 Four-Wire Setup Leased Line OperationDial Backup and Leased Line Restoral Dial Backup and Leased Line Restoral SetupLeased Line Operation MultiModemII User Guide Solving Problems None of the Indicators Light Modem Does Not Respond to Commands Solving ProblemsModem Dials But Cannot Connect Modem4Disconnects While Online Modem4Cannot Connect When Answering File Transfer4Is Slower Than It Should BeModem4Doesn’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 Appendix a Regulatory Compliance FCC Part 68 TelecomFax Branding Statement Regulatory ComplianceCommission Decision CTR21 Canadian Limitations NoticeInternational Modem Restrictions EMC, Safety, and Terminal Directive Compliance New Zealand Telecom Warning NoticeAppendix B Technical Specifications Technical Specifications Receiver Sensitivity Loopback Tests Test procedureLocal Analog Loopback Test V.54 Loop Remote Digital Loopback Test V.54 Loop Figure C-2. Remote digital loopback testLocal Digital Loopback Test V.54 Loop Figure C-3. Local digital loopback testBack-to-Back Test Figure C-5. Back-to-back test connections Limited Warranty ServiceTechnical Support Online Warranty RegistrationWarranty, Service, and Technical Support Multi-Tech BBSAbout the Internet Ordering Modem Accessories SupplyNet Online Ordering InstructionsUpgrade Overview Identify the Modem FirmwareMulti-Tech BBS Identify the Current Firmware VersionMulti-Tech Web Site Upgrading the ModemSet the Modem to the Factory Defaults Download the Upgrade FileExtract the Upgrade Files Upgrade the Modem’s Firmware Restore Your ParametersAppendix F Cable Pinouts RS-232 PinoutsLeased Line Pinouts Cable PinoutsAppendix G Ascii Character Map Ctrl Code Hex DecIndex 108 Index 110
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