3Com 5108M-TP manual Structure of This Guide

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Structure of This Guide

This guide contains the following chapters:

Chapter 1, Introduction Introduces the principal features of the ONline Ethernet 10BASE-T Module and provides views and descriptions of the front panel and the dip switches on the module.

Chapter 2, Designing and Expanding the Network Shows and explains examples of possible network configurations using the ONline System Concentrator and the ONline Ethernet 10BASE-T Module. These examples include both shielded and unshielded twisted pair configurations.

Chapter 3, Installing and Operating the Module Provides illustrated procedures for installing the 10BASE-T Module into the ONline System Concentrator.

Chapter 4, Troubleshooting Provides help in isolating and correcting problems that may arise during the installation process and during normal operation.

Appendix A, Specifications Provides electrical, environmental, and mechanical specifications, as well as other information for the module.

Appendix B, Technical Support Lists the various methods for contacting the 3Com technical support organization and for accessing other product support services.

Index

xii ONline Ethernet 10BASE-T Module User’s Guide

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Contents ONline Ethernet 10BASE-T Module User’s Guide Ii ONline Ethernet 10BASE-T Module User’s Guide ONline Ethernet 10BASE-T Module User’s Guide Iv ONline Ethernet 10BASE-T Module User’s Guide Contents Installing and Operating the Module Figures Viii ONline Ethernet 10BASE-T Module User’s Guide Tables Page How to Use This Guide AudienceStructure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents 3Com Documents Reference DocumentsPage Introduction ONline Ethernet 10BASE-T ModuleIndicators BASE-T Module Faceplate and ONline System Concentrator Dip Switches Interpretation of the 10BASE-T Module LEDsLED Name Color State Indicates Dip Switch SW1 Port Status Dip Switch SW3 Crossover Mode, Channel Select, Squelch Dip Switch SW1 Settings and InterpretationsDip Switch SW3 Settings for Switches 1 Switch Function Factory Switch Setting Default OffCrossover Mode Switch Squelch Mode SwitchChannel Select Switch Settings Dip Switch SW3 Settings and Interpretations for Switches 2 Switch Channel SelectionRelated Features Dip Switch SW6 Settings and InterpretationsEnable LED State Channel Configuration Channel Check CodesPage Designing and ExpandingtheNetwork Understanding the General Rules Basic Network RulesSeven Basic Network Rules Rule Definition Recommendations/NotesCertain LAN devices Seven Basic Network Rules LAN Equivalence LAN Product Equivalent DistancesLAN Product Equivalent Distance meters Fiber Backbone, Twisted Pair To-The-Desk Fiber Backbone, Twisted Pair To-The-Desk Example Sample Configuration Distance Calculation Maximum Link Distance on Twisted Pair Unshielded Twisted Pair High Squelch Low SquelchShielded Twisted Pair High Squelch Low Squelch IBM Type Twisted Pair Backbone, Twisted Pair To-The-Desk Unshielded Twisted Pair NetworkRedundant Twisted Pair Configuration Redundant LinksPage Patch Panels Installing and Operating the Module Precautionary ProceduresUnpacking Procedures Installation ProceduresInstalling a 10BASE-T Module BASE-T Module Cable Connection Troubleshooting TroubleshootingTroubleshooting With the Status LEDs Troubleshooting With the Port Status LEDsTroubleshooting With the Port Status LEDs Troubleshooting With the Port Status LEDs Troubleshooting With the Activity LEDs Troubleshooting With the Port Activity LEDsPossible Problem Troubleshooting State Solutions LED NameTechnical Assistance ONline Ethernet 10BASE-T Module Specifications Electrical SpecificationsEnvironmental Specifications Mechanical SpecificationsGeneral Specifications Twisted Pair Connectors and Cables Twisted Pair ConnectorsFigure A-1. RJ45 Connector Pin-outs Twisted Pair CablesConnecting Twisted Pair Cables Page Technical Support On-line Technical SupportSupport from Your Network Supplier Email Technical SupportWorld Wide Web Site Support from 3Com Accessing the 3Com MIB Returning Products for Repair3Com Technical Publications Page Index MIB, B-4