Multi-Tech Systems MT3410ZLX-T/2 Troubleshooting Introduction, No Response to AT Commands

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4 - Troubleshooting

Chapter 4 - Troubleshooting

Introduction

This chapter provides general and specific problem solving steps. Below are a number of examples of Problems (in bold text:), Causes (C:), and Solutions (S:). If your MT3410ZLX is not working properly, look up the problem and solution here; if unsuccessful, call Tech Support (see Chapter 5). At the end of this chapter is some specific steps for resolving IRQ and COM port conflicts.

No Response to AT Commands

C: The COMx port that the modem is set to may be used by another card in the computer already.

S: Change the COMx port of MT3410ZLX to a different unused port. It might be best to set it to COM3 or COM4. Even if you are not using a serial port which is set to the same COMx port as the modem, it can still interfere with the modem. Be sure to update your software COMx port setting as well.

C: The Interrupt that the modem is using may be the same Interrupt that another card is using.

S: Change the IRQ settings to a different, unused,

IRQ. Even if you are not using a serial port which is set to the same IRQ as the modem, it can still interfere with the modem.

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Contents Models MT3410ZLX MT3410ZLX-T/2 Record of Revisions MultiMobileTM Model # MT3410ZLX & MT3410ZLX-T/2Contents Comprehensive Driver Notes TroubleshootingService Appendix B AT Commands Registers & Result Codes Appendix a Technical SpecificationsAbout This Product Introduction and Description About This ManualSpecifications Modem Characteristics FeaturesFax System Requirements Ship Kit ContentsIntroduction and Description Installation Safety Warnings Installing The MT3410ZLX or MT3410ZLX-T/2 Cards Novell NetWare Installation Driver Software InstallationMenu Installation Driver Installation Screen Manual Driver Installation Carden Novell Client Installation VLM Microsoft LAN Manager Installation Microsoft LAN Manager Installation Screen Packet Driver Installation Select the Enhanced mode NDIS3 for.... string and press OK NDIS2 Driver for Workgroup Select the Real mode NDIS2 for... string and press OKODI Driver for Workgroups Select the Netware ODI Driver ... string and press OK Windows NT 3.51 / NT 4.0 Installation Driver from disk provided by hardware manufacturer Windows 95 InstallationArtisoft Lantastic 6.0 Installation PC Card Software Manual Installation Factory Default SettingsComprehensive Driver Notes Introduction Quick StartVendor Device Loaded in CONFIG.SYS Getting Started Using DOS Extended Memory ManagersCARDEN.EXE Driver Directory StructureDriver Upgrades Example of partial AUTOEXEC.BAT file LM28NDS2NIF Drivername LM28NDS$ \WFW311\NETSTART No Response to AT Commands Troubleshooting IntroductionModem Goes Off-Hook and Disables the Telephone Line Modem Does Not Execute the Command LineCharacters on the Screen Are Doubled Modem Does Not Auto-Answer the PhoneNo Text Appears on the Screen When in Command Mode No Text Appears on the Screen in Data ModeCommunications Software Dials, but Fails Modem Connects with Some Modems, but Not Others Modem Loses the Connection When in UseModem Gets Random Errors in Transmitted Data Occasionally, the Modem Gives a Burst of ErrorsModem Does Not Connect with Another Modem Text on the Screen Is Not Legible Connect When Using V.42bis or MNP5, Some Features Are DisabledEnabling The MT3410ZLX Example Device=C\DOS\EMM386.EXE RAM X=D000-D3FFSelect Properties Select Drivers in Properties Installing The Win 95 Driver Over SystemSoft CardWorksSelect Use Plug and Play Windows COM Port and IRQ ConflictsWindows Limited Warranty ServiceSoftware User License Agreement On-line Warranty RegistrationService Recording Modem Information Tech SupportService About the Multi-Tech BBS How to Use the Multi-Tech BBSAbout CompuServe/Internet About the Multi-Tech Fax-Back System Operating Systems DataPhysical How To Use AT Commands Appendix B AT Commands Registers & Result Codes IntroductionCommand Options Function & Description Basic AT CommandsAT&K3H0Enter Select Bell 212A for 1200 bps Command Options Function & Description Result code disabled AT& Ampersand Commands Set flow control Grant request from remote for RDL AT\ Back Slash Commands AT% Percent CommandsCommand Options Function & Description =0 or Connect AT- Dash Commands Registers ATSn=x Appendices Page Appendices S62 DTE rate status. The factory default is Appendices Result Codes 333 Carrier Consumer Instructions Page Appendices Page Canadian Limitations Notice FCC Fax UpdatePage AT Commands, S-Registers Dash Commands Data Specifications Desired DCE speed Installation Installing The MT3410ZLX or PC Card Software Manual Installation Service