3Com 5104M-FL1 10BASE-FL Module Configurations, Serial Configuration Using 10BASE-FL Modules

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Figure 2-4. Serial Configuration Using 10BASE-FL Modules

10BASE-FL Module Configurations

The theoretical maximum diameter of an all fiber Ethernet network is limited to 4.2 km as defined by the 51.2 μsec slottime that is specified for the round trip-delay budget set by the IEEE 802.3 CSMA/CD protocol. (Thus, point-to-point link distances are limited to a maximum of 4.2 km.) This section describes how to define total network size based on the limits of IEEE 802.3 collision detection.

Designing and Expanding the Network 2 - 15

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Contents Page Vcci Class 1 Compliance Page Page Contents Installing and Operating the Module Appendix a Specifications Page Figures Page Tables Page Audience How to Use This GuideStructure of This Guide Text Conventions Document ConventionsText Convention Example 3Com Documents Related DocumentsReference Documents Page Introduction 10BASE-FL Module Description Theory of Operation 10BASE-FL and Foirl Ieee Standards ComparisonBASE-F Standards 10BASE-F Standard DescriptionBASE-FL Module Connections Designing and ExpandingtheNetwork Basic Network Rules Understanding the General RulesSeven Basic Network Rules Rule Definition Recommendations/NotesAs equivalent distance. Every Assume that one LAN Product Equivalent Distances LAN EquivalenceLAN Product Equivalent Calculating Maximum Link Distance Determining Maximum 10BASE-FL Link DistancesDetermining Link Budget Cable Size Transmit Receive Optical Link Loss Power BASE-FL Module Optical Power BudgetDBm ONline toSplicing Connector Type Range of Loss Per Typical Loss dB Pair dB Connector and Splice Insertion LossTypical Fiber Loss Characteristics Splice Type Range of Loss dB Typical Loss dBMeter Fiber Link With Mechanical Splice Example Fiber Link With Mechanical SpliceMeter Fiber Link Through Two Patch Panels Example Fiber Link Through Patch PanelsChoosing a Network Backbone Cabling Structure Star ConfigurationStar-Wiring Configuration Serial ConfigurationSerial Configuration Using 10BASE-FL Modules 10BASE-FL Module Configurations10BASE-FL Backbone, 10BASE-FL to-the-Desk All-10BASE-FL Network with 3 Concentrators Example a Network with 6 Concentrators Example a Network with 3 ConcentratorsNetwork with 6 Concentrators Fiber Equivalent Distances Between Transceivers 10BASE-FL Backbone, Unshielded Twisted Pair to-the-DeskTotal Fiber Number Equivalent PathExample Sample Configuration Distance Calculation Sample Configuration Distance Calculation 10BASE-FB Fiber Backbone, 10BASE-FL to-the-Desk Example Fiber Backbone, 10BASE-FL to-the-Desk Sample Fiber Backbone, 10BASE-FL to-the-Desk ConfigurationConnecting External Network Devices Ieee Example Connecting a Thin Ethernet 10BASE2 SegmentDesigning and Expanding the Network 2 Configuring Ports for Fault Tolerance Fault-Tolerant ConfigurationsStandard Redundant Configuration In this configuration Setting Redundancy Implementing Backbone Cable Plant Fault Tolerance10. Redundant Fiber Backbone Configuration Remote Failure Signaling 11. Total Backbone Fault-Tolerant Configuration Implementing Total Backbone Fault Tolerance12. Network With 3 Concentrators ONline Ethernet 10BASE-FL Installation and Operation Guide Installing and Operating the Module Unpacking Procedures Precautionary ProceduresQuick Installation Procedures Quick InstallationStep Procedure Section Title Setting the Dip Switches BASE-FL Module Dip Switch Locations Setting Dip Switch SW1Factory Switch Setting Dip Switch SW1 SettingsFunction Off Default Dip Switch SW2 Settings for Switches 1 to Setting Dip Switch SW2Switch Function Factory Default Dip Switch SW2 Settings for Switches 5 Installing the ModuleSwitch Settings Channel SelectionInstalling the 10BASE-FL Module BASE-FL Module Connection Configuring the Module Enabling Ports Enabling Port Redundancy Selecting a NetworkSET Port slot.port Mode Redundant slot.port BASE-FL Modules Connected with Redundancy/RFS Enabled Enabling Remote Failure SignalingSaving Module Configuration Showing Module ConfigurationMonitoring the Front Panel Shows the location of these indicatorsBASE-FL Module Faceplate and ONline System Concentrator LED Name Color State Indicates Interpreting the 10BASE-FL Module LEDsVerifying the LED and Network Assignments LED State Module Is Configured forNetwork Check Codes Troubleshooting Troubleshooting Using the Port Activity LEDs Troubleshooting Using the Port Activity LEDsLED Name Possible Cause Corrective Action StateTroubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDsLED State Indication Possible Cause Corrective Action Replace remote device Technical Assistance RFS TroubleshootingONline Ethernet 10BASE-FL Installation and Operation Guide Specifications Table A-1. General Specifications General SpecificationsTransmitter Specifications Optical SpecificationsTable A-2. Transmit Power Peak Values Table A-3. Receiver Specifications Receiver SpecificationsSupported Fiber Optic Cables Table A-4. Fiber Optic Interface Specifications Power RequirementsTable A-5. Power Requirements Fiber Optic InterfaceMechanical Specifications Environmental SpecificationsTable A-6. Electrical Specifications Table A-7. Mechanical SpecificationsFiber Cables and Connectors 10BASE-FL Cable and Connector SpecificationsConnector Type Part Number Table A-8. Connector Type Part NumberOn-line Technical Support Technical SupportEmail Technical Support Support from Your Network SupplierWorld Wide Web Site Support from 3Com Returning Products for Repair Accessing the 3Com MIB3Com Technical Publications Page Index Index RFS VDE compliance Verify LED Operation, 3-19Network Assignment