Accton Technology FAST ETHERHUB-12S manual Appendix a Troubleshooting, Diagnosing Hub Indicators

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Appendix A: Troubleshooting

Diagnosing Hub Indicators

This Fast EtherHub can be easily monitored through its comprehensive panel indicators. These indicators assist the network manager in identifying problems the hub may encounter. This section describes common problems you may encounter and possible solutions.

Symptom: Power indicator does not light up.

Cause: Defective power outlet, power cord, or internal power supply.

Solution: Have your unit’s power supply or Power LED replaced. Ask for dealer assistance.

Symptom: Partition indicator lights up.

Cause: Hub has partitioned a port.

Solution: If port partitioning has occurred, the hub will automatically enable the port when the faulty condition disappears.

Symptom: Link/Traffic indicator remains unlit after making a connection.

Cause: Workstation’s network adapter, the cable, or the hub port is defective.

Solution: Verify that the hub and attached device are powered on. Be sure the cable is plugged into both the hub and corresponding device. Verify that the proper cable type is used (Chapter 2), and that its length does not exceed 100 meters. Check the adapter on the attached device and cable connections for possible defects. Replace the defective adapter or cable if necessary

Use the diagnostic procedures described in the following section to verify that all other system components are functioning properly. If you still cannot resolve the problem, contact your Accton distributor for assistance.

Troubleshooting

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Contents Fast EtherHub-12s Installation Manual QWHUQDWLRQDO+HDGTXDUWHUV Package Contents Quick Installation Fast EtherHub-12s User’s Guide About this Guide Contents Appendix B Port and Cable Assignments Appendix a TroubleshootingAppendix C Specifications Appendix E Product Support ServicesList of Tables Glossary Index List of FiguresIntroduction to Fast Ethernet Product OverviewAccton’s Fast EtherHub-12s Basic Features Fast EtherHub-12s User’s Guide Pre-Installation Requirements Installing the SystemMaking a Connection via an MDI-X Station Port Connecting the Hub SystemDistance Limit for Fast Ethernet Cabling Making a Connection via the MDI Daisy-Chain PortPrecise Cable Length Budgeting Providing Power to the EtherHub Verifying System Operation Verifying Port StatusFast EtherHub-12s User’s Guide Connecting Multiple Hubs Configuring the NetworkStand-Alone Multiple Hub Configuration Using the Daisy-Chain Port Using the RJ-45 Daisy-Chain PortPrecise Guidelines for Configuring Multiple Hubs Cabling Limits for Multiple Hub Configuration Hardware Reference IndicatorsFront Panel Color Red Label Alert Function Fan status Hardware Reference Color Label Function RJ-45 Ethernet Ports Rear Panel Power SocketDiagnosing Hub Indicators Appendix a TroubleshootingPower and Cooling Problems System DiagnosticsInstallation Hub Integrity Physical ConfigurationRJ-45 Port Appendix BCategory 5 STP/UTP Appendix C Product SpecificationsEMI Certification Appendix DFCC Class B Certification Voluntary Control Council for Interference VCCI-2 European Community Immunity Requirements CE Mark Declaration of Conformance for EMI and SafetyUnderwriters Laboratories Inc Safety ComplianceSicherheitshinweise Product Registration Appendix E Product Support ServicesProblem Report Hardware Repair ServiceInteractive Fast Fax U.S.A. office Bulletin Board Service BBSInternational Headquarters USA Headquarters Technical SupportCustomer Remedies Limited WarrantyNorth and South America Return ProcessOrdering Information Accton Offices100BASE-TX GlossaryLED Shielded Twisted-Pair STP Index Index EH3012-TX 150114-101 E0197-R02