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3Com 5108M-TP Troubleshooting With the Status LEDs, Indication, Possible, Problem, Suggestions

Models: 5108M-TP

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Troubleshooting With the Status LEDs

A blinking Port Status indicator may be a sign that the port detects a potential problem. Once a port detects a problem, you can further analyze the problem by counting the number of blinks. Table 4-1 provides troubleshooting suggestions for each of the blinking sequences.

Table 4-1. Troubleshooting With the Port Status LEDs

	LED State	Indication		Possible	Troubleshooting
	LED State	Indication		Problem	Suggestions
				Problem	Suggestions

	Off	Port		Port disabled	Enable port.
		Disabled
		Disabled		10BASE-T	Check the Controller
				10BASE-T	Check the Controller
				Module not	Module Power LEDs.
				powered

				Broken LED	Press the LED/Channel
					Check button on the
					Controller Module.

				Bad 10BASE-T	Replace module.
				Module

4 - 2 ONline Ethernet 10BASE-T Module User’s Guide

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3Com 5108M-TP manual Troubleshooting With the Status LEDs, Indication, Possible, Problem, Suggestions, LED State

Contents

ONline Ethernet 10BASE-T Module User’s Guide Document Number Printed March Model Number 5108M-TP 3Com Corporation118 Turnpike Road Southborough, MA U.S.A 508 FAX 508 Federal Communications Commission Notice Canadian Emissions RequirementsVDE Class B Compliance EN55022/CISPR22 ComplianceONline Ethernet 10BASE-T Module User’s Guide Restricted Rightsiv ONline Ethernet 10BASE-T Module User’s Guide Contents How to Use This GuideChapter 1 - Introduction Chapter 2 - Designing and Expanding the NetworkChapter 3 - Installing and Operating the Module Chapter 4 - TroubleshootingAppendix A - Specifications Appendix B - Technical SupportFigures viii ONline Ethernet 10BASE-T Module User’s Guide Tables Page How to Use This Guide AudienceStructure of This Guide Document Conventions ConventionIndicates ExampleRelated Documents A Caution. AA Warning. A Warning Wear eye3Com Documents Reference DocumentsPage 1 Introduction The ONline Ethernet 10BASE-T ModuleIndicators Figure 1-1. 10BASE-T Module Faceplate and ONline System Concentrator Introduction 1Dip Switches LED NameColor StateDip Switch SW1 Port Status Figure 1-2. 10BASE-T Module and Dip Switch LocationsDip Switch SW3 Crossover Mode, Channel Select, Squelch SwitchSwitch Setting DefaultCrossover Mode Switch Squelch Mode SwitchSwitch Switch SettingChannel Select Switch Settings 1 - 8 ONline Ethernet 10BASE-T Module User’s GuideDip Switch SW6 Link Integrity Channel SelectionSwitch SwitchRelated Features LED and Channel VerificationSwitch Switch SettingChannel Configuration The ONline Ethernet Network Management ModuleLED State Table 1-6. Channel Check Codes1 - 12 ONline Ethernet 10BASE-T Module User’s Guide 2 Designing and ExpandingtheNetwork Designing and Expanding the Network 2Understanding the General Rules Basic Network RulesRule DefinitionRecommendations/Notes Table 2-1. Seven Basic Network RulesTable 2-1. Seven Basic Network Rules Continued RuleDefinition Recommendations/NotesRule DefinitionRecommendations/Notes The fiber link distancesLAN Equivalence LAN ProductEquivalent Distance metersFiber Backbone, Twisted Pair To-The-Desk Table 2-2. LAN Product Equivalent Distances ContinuedLAN Product EquivalentFiber Backbone, Twisted Pair To-The-Desk Example Figure 2-1. Sample Configuration Distance Calculation Cable Gauge Supports Link Distances Up To22 .6mm 150mTwisted Pair Backbone, Twisted Pair To-The-Desk Figure 2-2. Unshielded Twisted Pair NetworkRedundant Links Figure 2-3. Redundant Twisted Pair ConfigurationTo set redundancy between two 10BASE-T Modules, connect two links between the modules. The redundant link must be connected to a port on the same 10BASE-T Module as the primary link. Use a crossover adapter between each link unless you choose to uncross port 8 on one of the modules to make the connection. Refer to Chapter 1 for information on using crossover mode. Then use the SET PORT slot.port MODE REDUNDANT slot.port command to specify which port is the primary link and which is the backup link Patch Panels 2 - 14 ONline Ethernet 10BASE-T Module User’s Guide3 Installing and Operating the Module Precautionary ProceduresUnpacking Procedures Installation ProceduresFigure 3-1. Installing a 10BASE-T Module Figure 3-2. 10BASE-T Module Cable Connection 4 Troubleshooting TroubleshootingTroubleshooting With the Status LEDs TroubleshootingProblem IndicationTroubleshooting ProblemLED State IndicationTroubleshooting ProblemLED State IndicationTroubleshooting With the Activity LEDs Possible ProblemSolutions TroubleshootingTechnical Assistance A Specifications ONline Ethernet 10BASE-T Module SpecificationsElectrical Specifications Environmental Specifications Mechanical SpecificationsGeneral Specifications Twisted Pair Connectors and Cables Twisted Pair ConnectorsTwisted Pair Cables Figure A-1. RJ45 Connector Pin-outsConnecting Twisted Pair Cables Page B 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 Numerics