Designing and Expanding the Network 2 | 3Com 5104M-FL1 guide

Note: In the reverse direction, a signal originating at Transceiver A loses 165 m of fiber equivalent distance when it exits the 10BASE-T Module to which Transceiver B is connected and

330meters for the signal entering the 10BASE-FL Module in the bottom concentrator. The overall fiber equivalence of the path is greater for signals going from Transceiver B to A, however, the B to A fiber equivalence determines whether the link meets the 4200 m Ethernet link maximum.

5.Subtract the sum of intervening cable lengths:

185 m + 50 m + 200 m + 1500 m + 100 m = 2035 m

6.The remainder is:

4200 m - 420 m - 230 m - 560 m - 800 m - 2035 m = 155 m

Because the remaining value is greater than zero, the configuration in Figure 2-9 is legal.

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3Com 5104M-FL1 installation and operation guide Designing and Expanding the Network 2

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 Guide Structure of This Guide Text Conventions Document ConventionsText Convention Example 3Com Documents Related Documents Reference Documents Page Introduction 10BASE-FL Module Description Theory of Operation 10BASE-FL and Foirl Ieee Standards ComparisonBASE-F Standards 10BASE-F Standard Description BASE-FL Module Connections Designing and ExpandingtheNetwork Basic Network Rules Understanding the General RulesSeven Basic Network Rules Rule Definition Recommendations/Notes As equivalent distance. Every Assume that one LAN Product Equivalent Distances LAN EquivalenceLAN Product Equivalent Calculating Maximum Link Distance Determining Maximum 10BASE-FL Link Distances Determining Link Budget Cable Size Transmit Receive Optical Link Loss Power BASE-FL Module Optical Power BudgetDBm ONline to Splicing 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 dB Meter Fiber Link With Mechanical Splice Example Fiber Link With Mechanical Splice Meter Fiber Link Through Two Patch Panels Example Fiber Link Through Patch Panels Choosing a Network Backbone Cabling Structure Star Configuration Star-Wiring Configuration Serial Configuration Serial Configuration Using 10BASE-FL Modules 10BASE-FL Module Configurations 10BASE-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 Concentrators Network with 6 Concentrators Fiber Equivalent Distances Between Transceivers 10BASE-FL Backbone, Unshielded Twisted Pair to-the-DeskTotal Fiber Number Equivalent Path Example 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 Configuration Connecting External Network Devices Ieee Example Connecting a Thin Ethernet 10BASE2 Segment Designing 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 Tolerance 10. Redundant Fiber Backbone Configuration Remote Failure Signaling 11. Total Backbone Fault-Tolerant Configuration Implementing Total Backbone Fault Tolerance 12. Network With 3 Concentrators ONline Ethernet 10BASE-FL Installation and Operation Guide Installing and Operating the Module Unpacking Procedures Precautionary Procedures Quick Installation Procedures Quick InstallationStep Procedure Section Title Setting the Dip Switches BASE-FL Module Dip Switch Locations Setting Dip Switch SW1 Factory 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 Selection Installing the 10BASE-FL Module BASE-FL Module Connection Configuring the Module Enabling Ports Enabling Port Redundancy Selecting a Network SET Port slot.port Mode Redundant slot.port BASE-FL Modules Connected with Redundancy/RFS Enabled Enabling Remote Failure Signaling Saving Module Configuration Showing Module Configuration Monitoring the Front Panel Shows the location of these indicators BASE-FL Module Faceplate and ONline System Concentrator LED Name Color State Indicates Interpreting the 10BASE-FL Module LEDs Verifying 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 State Troubleshooting Using the Port Status LEDs Troubleshooting Using the Port Status LEDsLED State Indication Possible Cause Corrective Action Replace remote device Technical Assistance RFS Troubleshooting ONline Ethernet 10BASE-FL Installation and Operation Guide Specifications Table A-1. General Specifications General Specifications Transmitter 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 Interface Mechanical Specifications Environmental SpecificationsTable A-6. Electrical Specifications Table A-7. Mechanical Specifications Fiber Cables and Connectors 10BASE-FL Cable and Connector Specifications Connector Type Part Number Table A-8. Connector Type Part Number On-line Technical Support Technical Support Email Technical Support Support from Your Network SupplierWorld Wide Web Site Support from 3Com Returning Products for Repair Accessing the 3Com MIB 3Com Technical Publications Page Index Index RFS VDE compliance Verify LED Operation, 3-19Network Assignment