3Com DUA1770-0AAA04 manual Online Technical, Services

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D	TECHNICAL SUPPORT

	3Com provides easy access to technical support information through a
	variety of services. This appendix describes these services.
	Information contained in this appendix is correct at time of publication. For
	the most recent information, 3Com recommends that you access the
	3Com Corporation World Wide Web site.

Online Technical	3Com offers worldwide product support 24 hours a day, 7 days a week,
Services	through the following online systems:
	■ World Wide Web site
	■ 3Com Knowledgebase Web Services
	■ 3Com FTP site
World Wide Web Site	To access the latest networking information on the 3Com Corporation
	World Wide Web site, enter this URL into your Internet browser:
	http://www.3com.com/
	This service provides access to online support information such as technical
	documentation and software, as well as support options that range from
	technical education to maintenance and professional services.
3Com	The 3Com Knowledgebase is a database of technical information to help
Knowledgebase Web	you install, upgrade, configure, or support 3Com products. The
Services	Knowledgebase is updated daily with technical information discovered by
	3Com technical support engineers. This complimentary service, which is
	available 24 hours a day, 7 days a week to 3Com customers and partners,
	is located on the 3Com Corporation World Wide Web site at:

http://knowledgebase.3com.com

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Setting UP for Management PIN-OUTS Page About this Guide Conventions Icon DescriptionConvention Description Related DocumentationDocumentation documentation Directory as a whole to maintain the structure of the files Please include the following information when commentingSuperStack 3 Switch 4900 Series Getting Started Guide 3Com recommends that you copy the Docs/referenceguideIntroducing Introducing the Superstack 3 Switch 4900 Series Hardware Features Switches Switch 4900 front view Switch Front View DetailSwitch 4924 front view Ports cross-over Unit LEDs Power/Self Test LEDColor Indicates Port Status LEDs Module Status LEDsSwitch 4900 rear view Switch RearSwitch 4924 rear view Power SocketDefault Settings Supported by your SwitchSwitch units, it is returned to these defaults Installing the Switch Package Contents Choosing a SuitableSite Have been fitted Flow through the side panels of the SwitchRack-mounting Desk, or attach it to a wallFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchInterconnecting two Switch 4900 units Sequence Power-upPowering-up SwitchPower System output Options RJ-45 connector is now a grounded portThat contain alignment pins can cause damage to your Switch Your SwitchTransceivers Switch 4950 GbicOperation Approved GbicInserting a Gbic Transceiver into a Switch Fiber SC connector Type 4 Gbic with internal Eeprom fittedSwitch 4950 Gbic Operation Installing the Switch Setting UP for Management Overview Setting UpAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationConnecting the Workstation to the Switch Configuring the Workstation with IP InformationSetting Up the Switch with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu 19,200 baud Data bits Connecting a workstation to the Switch via the console portSetting Up the Switch with IP Information Configured IP ViewingAutomatically Pre-requisites Viewing IP Information via the Console Port Example top-level command line interface menu Refer to Setting Up Command Line Interface Management on CLI Management via Command LineNetwork Using Telnet Interface ManagementSetting Up Web InterfaceChoosing a Browser Http//xxx.xxx.xxx.xxx Over the NetworkSetting Up Snmp Default UsersPasswords Security Device User Modify operation on the web interface User Default Name Password Access LevelFor Technical Support information, see Appendix D Problem SolvingOn powering-up, the Power/Self Test LED lights yellow Solving ProblemsSolutions below Power LED does not lightFor further information about RMON, refer to Status ProblemsSolving Hardware Fan failure warning message is receivedUnit fails, no Snmp fan failure message is received Error message indicating that the Gbic transceiver is faultyIP Addressing Solving Communication ProblemsHow do you obtain a registered IP Address? Safety Information This must be approved for the country where it is used Important Safety InformationImportant Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Schko ’information de Sécurité ImportanteAppendix a Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Der Netzstecker muß die Norm CEE 7/7 erfüllen Schuko Wichtige SicherheitsinformationenWichtige Sicherheitsinformationen Appendix a Safety Information PC-AT Serial Cable Null Modem Cable 9-pin to RS-232 25-pinPin to 9-pin Assignments ConnectorsModem Cable RJ-45 PinPin Number 10/100BASE-T 1000BASE-T Appendix B PIN-OUTS Same unless otherwise stated Physical DimensionsSafety Power ConsumptionStandards Supported Power SupplyProtocols Used for Administration Heat DissipationOnline Technical ServicesUsername anonymous From this region, enter the URL Asia, Pacific RimFrom this region, email Europe, Middle East and AfricaEurope, Middle East and Africa Asia, Pacific RimCountry Telephone Number Asia, Pacific Rim Country Telephone Number Latin America Numbers IndexPasswords Regulatory Notices