3Com 5108M-TP manual Troubleshooting With the Port Status LEDs

Page 50

Table 4-1. Troubleshooting With the Port Status LEDs (Continued)

LED State

Indication

Possible

Troubleshooting

Problem

Suggestions

 

 

 

 

 

 

 

 

 

 

2 Blinks

Port

Faulty cable

Check cable with cable

 

 

Partitioning

 

tester. Repair or replace

 

 

 

 

 

cable.

 

 

 

 

 

 

 

 

 

 

Network

Reassign users to

 

 

 

 

overloaded

another channel to

 

 

 

 

 

balance the load.

 

 

 

 

 

 

 

Jabber

Transceiver

Try another port or

 

 

condition

attached to the

replace module.

 

 

 

 

port is jabbering

 

 

 

 

 

or has DTE

 

 

 

 

 

jabber

 

 

 

 

 

Timed

Link

None

This is not a problem.

Blinks (LED

Integrity

 

You may want Link

is on for 10

Disabled

 

Integrity disabled.

seconds,

 

 

 

 

blinks off

 

 

 

 

for 400

 

 

 

 

msecs)

 

 

 

 

 

 

 

 

 

 

4 - 4 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 Usr/snm/agents Document ConventionsConvention Indicates Example Related Documents 3Com Documents Reference DocumentsPage Introduction ONline Ethernet 10BASE-T ModuleIndicators BASE-T Module Faceplate and ONline System Concentrator LED Name Color State Indicates Dip SwitchesInterpretation of the 10BASE-T Module LEDs Dip Switch SW1 Port Status Dip Switch SW3 Crossover Mode, Channel Select, Squelch Dip Switch SW1 Settings and InterpretationsCrossover Mode Switch Dip Switch SW3 Settings for Switches 1Switch Function Factory Switch Setting Default Off Squelch Mode SwitchChannel Select Switch Settings Dip Switch SW3 Settings and Interpretations for Switches 2 Switch Channel SelectionEnable Related FeaturesDip Switch SW6 Settings and Interpretations 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 Product Equivalent Distance meters LAN EquivalenceLAN Product Equivalent Distances Fiber Backbone, Twisted Pair To-The-Desk Fiber Backbone, Twisted Pair To-The-Desk Example Sample Configuration Distance Calculation Shielded Twisted Pair High Squelch Low Squelch IBM Type Maximum Link Distance on Twisted PairUnshielded Twisted Pair High Squelch Low Squelch 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 Possible Problem Troubleshooting State Solutions Troubleshooting With the Activity LEDsTroubleshooting With the Port Activity LEDs LED NameTechnical Assistance ONline Ethernet 10BASE-T Module Specifications Electrical SpecificationsGeneral Specifications Environmental SpecificationsMechanical 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 SupportWorld Wide Web Site Support from Your Network SupplierEmail Technical Support Support from 3Com Accessing the 3Com MIB Returning Products for Repair3Com Technical Publications Page Index MIB, B-4