3Com 5108M-TP manual Related Features, Dip Switch SW6 Settings and Interpretations, Enable

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If you enable a port and disable Link Integrity, the Status LED is on for 10 seconds and blinks off for 400 msecs to indicate that Link Integrity is disabled.

Table 1-5 lists the settings and functions for switches 1 through 8.

Table 1-5. Dip Switch SW6 Settings and Interpretations

Switch

Function

Factory

Switch Setting

Default

Off

On

 

 

 

 

 

 

 

1 - 8

Enable/disable link integrity

enable

disable

enable

 

 

 

 

 

If you have an ONline Ethernet Network Management Module installed in your Concentrator, you can remotely override these switch settings.

Related Features

The following sections describe functions which allow you to:

check the module's channel assignment and LED functionality

remotely manage the 10BASE-T Module

LED and Channel Verification

The ONline Controller Module is equipped with an LED/Channel Check button on the front panel. The LED/Channel Check button has two functions: it causes all LEDs in all modules in the concentrator to light and it causes each module to identify the channel to which it is assigned. When you activate this button, it causes all module LEDs to light for approximately five seconds. Any LED that does not light is defective.

After the five seconds elapse, the diagnostic continues with a channel check of all modules. This channel check causes each module's Status LEDs to blink a number of times corresponding to the channel to which it is

1 - 10 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