3Com 5017C-LS, 5017C with load sharing Backup Concentrator, Redundant Cable Link Configuration

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Figure 1-6. Redundant Cable Link Configuration

Backup Concentrator

A second concentrator or 3Com Fiber Ethernet Star Coupler may be used to backup the primary concentrator in a star-wired network. This provides full fault tolerance for a backbone cable plant.

1 - 10 ONline 17-Slot System Concentrator Installation and Operation Guide

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Contents Document Number Printed March VDE Class B Compliance Restricted Rights Page Contents Maintenance Appendix B Slot Usage Chart Appendix C Technical Support Page Figures Page Tables Page How to Use This Guide AudienceStructure of This Guide This guide contains the following chaptersDocument Conventions Convention Indicates ExampleRelated Documents 3Com Documents Reference DocumentsPage Introduction Introducing the ONline System ConcentratorMultiple 17-Slot Concentrator Environment Back Panel Front PanelONline System Concentrator Features ONline System Concentrator Front ViewModular ONline Configuration Modular DesignPort-Switching Technology TriChannel ArchitectureONline System Concentrator Using Multiple Networks Backup Power Supply Fault-Tolerance CapabilitiesLoad Sharing Backup Controller Module Redundant Cable LinksBackup Concentrator Redundant Cable Link ConfigurationBackup Concentrator Configuration Hot Swapping of Media ModulesSynchronous Backplane Installation and Troubleshooting Contents of the Shipping BoxONline System Concentrator Shipping Box Contents FCC Regulations Location Requirements Site Selection ConsiderationsVentilation Power Requirements Rack Mount Installation RequirementsInstallation Table Top Installation RequirementsInstalling the Cable Tray Rack Mount Settings Cable Tray Rack MountingRack Mount Positions Cable Tray Installation in Rack Cable Tray Table MountingInstalling the ONline System Concentrator Rack Mounting the ONline System ConcentratorAttaching the Rack Mount Flanges Table Top Mounting the ONline Concentrator Chassis Mounted in RackInstalling the Backup Power Supply Optional Removing Fan UnitUnplugging the Fan Unit Power Supply Connectors Selecting the Power Supply Voltage 10. Installed Backup Power Supply11. Setting the Voltage Selector Switch Installing ONline Modules Connecting Network CablesPower Up and Verification 12. Network Cable ConnectionsPower Supply Operation Verification Fan Operation VerificationTroubleshooting with Controller Module LEDs Command. If this fails to See Primary Power LED Technical Assistance Where To Go From Here Configuration of your concentratorMaintenance Routine Maintenance Replacing the Power SupplyRemoving the Power Supply Unplugging the Power Supply Power Supply Plugs in ONline System Concentrator Backup Power Supply Installed Replacing the Fan Unit Removing the Fan UnitUnplugging the Fan Unit ONline Module Maintenance Other System ComponentsPage General EnvironmentalMechanical Power SourceRegulatory Compliance Accessories Page Slot Usage Chart Table B-1. Concentrator Slot Usage Chart Table B-1. Concentrator Slot Usage Chart Page Technical Support On-line Technical SupportEmail Technical Support Support from Your Network SupplierWorld Wide Web Site Support from 3Com Accessing the 3Com MIB Returning Products for Repair3Com Technical Publications Page Index Index