3Com 16985ua.bk manual Problem

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Solving Problems Indicated by LEDs

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Solving Problems If the LEDs on the Switch indicate a problem, refer to Table 5 which

Indicated by LEDs contains a list of problems and suggested solutions.

Table 5 Problems indicated by LEDs

Problem

Suggested Solution

A Power LED does not Check that the power cable is firmly connected to the

lightrelevant Switch unit and to the supply outlet. If the connection is secure and there is still no power, you may have a faulty power cord.

On powering-up, the Power/Self Test LED lights yellow and a Unit LED lights green

The relevant Switch unit has failed its Power On Self Test (POST) because of an internal problem. Contact your supplier for advice.

A link is connected and yet the Status LED for the port does not light

Check that:

■All connections are secure.

■The devices at both ends of the link are powered-up.

■The connection uses cross-over cable if you are linking a 10BASE-T or 100BASE-TX port with a device that is MDIX-only.

For information about solving problems when managing the Switch, refer to the Problem Solving chapter in the “SuperStack Switch Management Guide”.

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents PIN -OUTS Page Page About this Guide Icon Description ConventionsConvention Description Documentation RelatedProduct YearCompliance CommentsIntroducing the Switch 3300 MM Summary of Features About SuperStack Switch 3300 MMSwitch 3300 MM front view Switch 3300 MM Front View DetailColor Indicates Port Status LEDs Power/Self Test LEDUnit LEDs Power Socket Switch 3300 MM Rear View DetailUnits on Examples ConfigurationSwitch 3300 MM as a NetworkUsing the Switch as a collapsed backbone SwitchUsing the Switch in a desktop environment Fast Ethernet configuration rules Configuration Rules with Full Duplex Introducing the Switch 3300 MM Installing the Switch Rack-mounting Fitting a bracket for rack mounting Repeat steps 2 and 3 for the other side of the SwitchTreated as a single manageable unit with one IP address Stacking UnitsStacking Units Stack of three units Sequence Power-upPowered-up and ready for operation Switch 3300 MMColor State ChoosingCorrect Cables Port, you need a cross-over cable. Most of the 10BASE-TProblem Guide SwitchNetwork. For information on managing the Switch using ManagingSafety Information Information Important SafetyPersonnel only Important Safety Information Étroites ’information deSécurité Importante Personnel qualifié’information de Sécurité Importante Wichtige Sicherheitsinformat ionen Pin to 9-pin Null Modem CablePC-AT Serial Cable Pin to RS-232 25-pinRJ45 Pin ConnectorsPin Number Signal Function Modem CablePin Number Signal Function Appendix B PIN-OUTS Environmental Requirements Physical DimensionsSafety Power SupplyVlan MIB RFC Online Technical ServicesUsername anonymous Country Telephone Number Asia, Pacific Rim Europe, South Africa, and Middle EastCountry Telephone Number Fax Number Glossary Ethernet BroadcastCollision EndstationLine speed See baud Repeater LoopMulticast ProtocolTelnet ServerStack SuperStackGlossary Index Index 3Com Corporation Limited Warranty Page Disclaimer Regulatory Notices

16985ua.bk specifications

The 3Com 16985UA.BK is a renowned networking product that has made a significant impact on the realm of technology, particularly in the area of networking and data communication. As part of the 3Com family, this device is recognized for its reliability and effectiveness in connecting devices and managing networks. Manufacturers and IT professionals turn to 3Com products for their robust architecture and versatility, and the 16985UA.BK excels in these departments.

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