Multitech MT5600BAV.90, MT5600BAV.92, MT5600BLV.90 manual Modem Cannot Connect When Dialing

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Chapter 7 - Troubleshooting

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 request. 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 conflicting 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 documentation.

Windows NT 4.0: To look for address or IRQ conflicts, click Start, Programs, Administrative 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 documentation.

·The serial port might be defective. If you have another serial port, install the modem on it, change the COM port setting in your software, and try again.

·The modem might have a problem beyond the scope of this user guide. If you have another Multi- Tech modem, try swapping modems. If the problem goes away, call Technical Support for assistance (see Appendix D).

The Modem Cannot Connect When Dialing

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 result 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. When you dial again, the modem reports the call’s progress.

·If the modem reports NO DIALTONE, check that the modem’s telephone line cable 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 behind a corporate phone system (PBX) with an internal dial tone that sounds different from the normal dial tone. In that case, the modem might not recognize the dial tone and might treat it as an error. Check your PBX manual to see if you can change the internal dial tone; if you can’t, change your modem’s initialization string to replace X4 with X3, which will cause the modem to ignore dial tones (note, however, that X3 is not allowed in some countries, such as France and Spain).

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Contents MT5600BA-V.92 MT5600BA-V.90 MT5600BL-V.90 MT5600BA/BL SeriesRevision Date Description Table of Contents Contents Features Description and FeaturesProduct Description Safety Warnings Connect the Modem to Your System InstallationConnect the Phone to the Modem Optional Removing an Old Modem Driver Install the Modem DriverMT5600BA-V.92 Only Country Code ConfigurationInstall Phone Tools Modem Configuration Using the Front PanelLED Indicators Option Selection Liquid Crystal Display LCDMenu Structure Twigs Menu OverviewStatus Trunk Basic Options Trunk From previous Advanced Options Trunk Advanced Options Trunk Diagnostic Options Trunk Remote Configuration Options TrunkCaller ID Options Trunk Phone Number Memory Options TrunkStatus Menu OptionsBasic Options Using the Front Panel Advanced Options Using the Front Panel Diagnostic Options Remote Configuration OptionsPhone Number Memory Options Caller ID Options Leased-Line Operation Two-Wire SetupFour-Wire Setup Dial Backup and Leased Line Restoral Setup Dial Backup and Leased-Line RestoralLeased Line Operation Remote Configuration Changing the Remote Escape Character Callback Security Setup ProceduresFront Panel Method Assigning Callback PasswordsAssigning Callback Phone Numbers Calling Procedure Callback Enable/Disable Callback Security Commands Callback Assignments Form None of the Indicators Light TroubleshootingModem Does Not Respond to Commands Modem Cannot Connect When Dialing Modem Disconnects While Online File Transfer Is Slower Than It Should Be Modem Cannot Connect When AnsweringData Is Being Lost Modem Doesn’t Work with Caller ID There Are Garbage Characters on the MonitorFax and Data Software Can’t Run at the Same Time FCC Part 68 Telecom Appendix a Regulatory ComplianceCanadian Limitations Notice Fax Branding StatementInternational Modem Restrictions EMC, Safety, and R&TTE Directive ComplianceNew Zealand Telecom Warning Notice South African Notice Modem Compatibility Appendix B Technical SpecificationsTransmission Level Multi-Tech Systems, Inc. Warranty & Repairs Policies Appendix C Warranty, Service, Technical SupportRepair Procedures for International Distributors Online Warranty Registration ServiceInternational Customers outside U.S.A. and Canada Replacement PartsInternet Sites Technical SupportIdentify the Modem Firmware Upgrade OverviewAppendix D Upgrading the Firmware IntroductionExtract the Upgrade Files Download the Upgrade FileIdentify the Current Firmware Version Restore Your Parameters Upgrade the Modem’s FirmwareClear Your Stored Paramenters Appendix E Installing a Modem Under Linux Using the Modem to Call the Internet RS-232 Pin Descriptions Appendix F Pin DescriptionsRDL RS-232 Cable PinoutsFig. F-3. Macintosh cable Leased Line PinoutsIndex Index
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