Allied Telesis AT-GS950/8POE manual Troubleshooting, Chapter

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Chapter 4

Troubleshooting

This chapter contains information about how to troubleshoot a switch in the event a problem occurs. Sections in the chapter include:

ˆ“Power LED is Off” on page 56

ˆ“Twisted Pair Port Link LED is Off” on page 57

ˆ“Port PoE LED is not Solid Green” on page 58

ˆ“Port PoE LED is Off” on page 59

ˆ“SFP LED is Off” on page 60

ˆ“Transceiver is Installed but the Status is “Not Present”” on page 61

ˆ“Switch Functions Intermittently” on page 62

Note

If you are unable to resolve the problem after following the instructions in this chapter, contact Allied Telesis Technical Support for assistance. Refer to “Contacting Allied Telesis” on page 16 for contact information.

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Contents Installation Guide Page Electrical Safety and Emissions Standards Translated Safety Statements Contents Optional Transceiver Cable Specifications Figures Figures Tables Tables Preface Product Documentation Starting a Management Session Symbol Meaning Description Safety Symbols Used in this DocumentWhere to Find Web-based Guides Contacting Allied Telesis Management Software UpdatesChapter Overview10/100/1000Base-T Ports IntroductionPage 10/100/1000Base-T Twisted Pair Ports Connector Type Speed Duplex Mode Maximum DistanceCable Type Auto-MDI/ MDI-X Port Pinouts Power over Ethernet Minimum Power Maximum Power Class Redundant Twisted Pair Ports SFP Transceiver Slots LED LEDsSFP LEDs State Description Power Supply Network Topologies Power Workgroup TopologyCollapsed Backbone-Hub Topology Overview Installing the Hardware Reviewing Safety Precautions Page Selecting a Site for the Switch Unpacking a Switch Installing the Switch on a Desktop Installing the Switch in an Equipment Rack Ase-X Attaching a Rack-mount Bracket for Wall mounting Installing the Switch on a Wall1353 Resetting the Switch Resetting the SwitchInstalling the Hardware Cabling the Network Ports Twisted Pair Cable Specifications Cable SpecificationsOptional Transceiver Cable Specifications Cabling the Switch Connecting an RJ-45 Cable Installing an SFP Transceiver Installing Optional TransceiversRemoving the SFP Cover 1350 Powering on a Switch Cabling the Network Ports Troubleshooting Power LED is Off Twisted Pair Port Link LED is Off Port PoE LED is not Solid Green Port PoE LED is Off SFP LED is Off Transceiver is Installed but the Status is Not Present Switch Functions Intermittently Power Specifications Technical SpecificationsPhysical Specifications Environmental SpecificationsCertifications RJ-45 Twisted Pair Port Pinouts Pin SignalPinout Pair RJ-45 Style Serial Terminal Port Pinouts Appendix a Technical Specifications