3Com 5102M-FBP, 5104M-FB1, 510M-FBP installation and operation guide 10BASE-FL

Page 84

Table 4-2. Troubleshooting Using the Port Status LEDs (Continued)

LED State

Indication

Possible Cause

Corrective Action

 

 

 

 

 

5 Blinks

Invalid Data

Receive light

Verify that received

 

 

 

intensity too

optical power level is

 

 

 

high.

correct. Refer to

 

 

 

 

Chapter 2 (Link

 

 

 

 

Distances).

 

 

 

 

 

 

 

 

Connection

Unplug the

 

 

 

made to

connection. 10BASE-FL

 

 

 

10BASE-FL

is not compatible with

 

 

 

Module.

this 10BASE-FB

 

 

 

 

Module.

 

 

 

 

 

 

 

 

Bad fiber

Clean and reconnect

 

 

 

connections.

fiber (both ends).

 

 

 

 

 

 

 

 

Broken or

Check and fix RX fiber

 

 

 

cracked fiber.

link.

 

 

 

 

 

 

 

 

Bad remote

Try another port or

 

 

 

device.

replace device.

 

 

 

 

 

 

 

 

Bad 10BASE-FB

Replace the module.

 

 

 

Module.

 

 

 

 

 

6 Blinks

Low Light

Low light

Verify optical power

 

Received

received.

received is at low end

 

 

 

 

of optical power

 

 

 

 

budget by doing an

 

 

 

 

optical power

 

 

 

 

calculation. If value is

 

 

 

 

acceptable, disable low

 

 

 

 

light detection.

 

 

 

 

 

 

 

 

Legal

Disable low light

 

 

 

configuration

detection or enable

 

 

 

with acceptable

High power at remote

 

 

 

low light.

end.

 

 

 

 

 

4 - 6 ONline Ethernet 10BASE-FB Module Installation and Operation Guide

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Contents Page VDE Class B Compliance Restricted Rights Page Contents Installing and Operating the Module Appendix a Specifications Page Figures Page Tables Page How to Use This Guide AudienceStructure of This Guide Document Conventions Convention Indicates ExampleUsr/snm/agents Related Documents 3Com DocumentsSlot ONline System Concentrator Installation and Operation Reference DocumentsPage Introduction 10BASE-FB Module Descriptions Introduction 1 10BASE-FB Compliance Theory of OperationBASE-FB Module Connections Compatibility With Other Ethernet Fiber Products BASE-FB Module Compatibility3Com Product Part Number Designing and Expanding the Network Rules for Configuring a Network Understanding the General RulesBasic Network Rules Rule Definition Recommendations/NotesDefinition Recommendations/Notes Is actually equal to 1.1 meters Equivalent Fiber Distances Equivalent Fiber Distances of LAN ProductsLAN Product Equivalent Fiber Determining Maximum Fiber Link Distances Calculating Maximum Link Distance Determining Link BudgetONline 10BASE-FB Module Optical Power Budget Normal Power PowerLink Link Loss DBmONline 10BASE-FB Module Optical Power Budget High Power BASE-FB Optical Power BudgetCable Size Used Transmit Receive Optical Power Micron ONline toAttenuation Connector and Splice Insertion Loss Typical Fiber Loss CharacteristicsExample 1700 Meter Fiber Link With Mechanical Splice Meter Fiber Link With Mechanical SpliceExample 2000 Meter Fiber Link Through Two Patch Panels Meter Fiber Link Through Two Patch PanelsChoosing a Network Backbone Cabling Structure Star Configuration Star-Wiring ConfigurationSerial Configuration Serial Configuration Using 10BASE-FB Modules10BASE-FB Module Configurations Fiber Backbone, Fiber-to-the-DeskAll-Fiber Network Example Network With 3 Concentrators Network With 3 ConcentratorsNetwork Configured With 8 Concentrators Example Network with 8 ConcentratorsFiber Equivalent Distances Between Transceivers Example Sample Configuration Distance Calculation Fiber Backbone, Unshielded Twisted Pair to-the-DeskSample Configuration Distance Calculation Example Connecting a Thin Ethernet 10BASE2 Segment Fiber Backbone, Coaxial ConnectionDesigning and Expanding the Network 2 Fault-Tolerant Configurations Configuring Ports for Fault ToleranceStandard Redundant Configuration In this configuration Setting Redundancy 10. Redundant Fiber Backbone Configuration Implementing Total Backbone Fault Tolerance 11. Total Backbone Fault-Tolerant Configuration 12. Fiber Network With 3 Concentrators Page Installing and Operating the Module Precautionary Procedures Unpacking Procedures Quick Installation Quick Installation ProceduresStep Procedure Section Title Setting the Dip Switches BASE-FB Module Dip Switch Locations Setting Dip Switch S1 Dip Switch S1 Settings for Switches 1Switch Label Function Factory Switch Setting Default Off Dip Switch S1 Settings for Switches 3 to Port-Switching Module PortModule-Switching Module Channel SelectionSetting Dip Switch S2 Dip Switch S2 SettingsSwitch Label Function Factory Switch Setting Default Installing the Module Enable/disable Disable Module Low Light Detection Not UsedInstalling the 10BASE-FB Module BASE-FB Module Connection Configuring the Module Enabling Ports Selecting a Network You can enable port redundancy in one of the following ways Enabling Port RedundancyEnabling Optical Power Enabling Low Light WarningShowing Module Configuration Saving Module ConfigurationMonitoring the Front Panel Page Interpreting the 10BASE-FB Module LEDs LED Name Color State IndicatesLED State Network Configuration Verifying LED and Network AssignmentsNetwork Check Codes Troubleshooting Troubleshooting Using the Port Activity LEDs Troubleshooting Using the Port Activity LEDsPossible Cause Corrective Action Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDsLED State Indication Possible Cause Corrective Action Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDs 10BASE-FL Technical Assistance Page Specifications General Specifications Table A-1. General SpecificationsOptical Specifications Transmitter SpecificationsTable A-2. Transmit Power Cable Type Normal Power High PowerReceiver Specifications Table A-3. Receiver SpecificationsSupported Fiber Optic Cables Power Requirements Table A-4. Fiber Optic Interface SpecificationsTable A-5. Power Requirements Fiber Optic InterfaceEnvironmental Specifications Mechanical SpecificationsTable A-6. Electrical Specifications Table A-7. Mechanical Specifications10BASE-FB Cable and Connector Specifications 10BASE-FB Cables10BASE-FB Connectors Port-Switching Connector TypeTable A-8 BASE-FB Module Part Numbers 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 Installing Link Budget Redundant Link, 3-16Redundancy LED Unpacking Procedures, 3-3Unshielded Twisted Pair Cable
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