3Com DUA1770-0AAA04 manual RJ-45 connector is now a grounded port, Options, Only, Your Switch

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28CHAPTER 2: INSTALLING THE SWITCH

Table 7 Cables required to connect the Switch to other devices if auto-negotiation is disabled

Cross-over Cable

Straight-through Cable

Switch to Switch (MDIX to MDIX)

Switch to Hub (MDIX to MDIX)

Switch to PC (NIC) (MDIX to MDI)

✓✕

✓✕

✕✓

	CAUTION: If you want to install the Switch using a Category 5E or
	Category 6 cable, 3Com recommends that you briefly connect the cable
	to a grounded port before connecting network equipment. If you do not,
	the cable’s Electrostatic Discharge (ESD) may damage the Switch's port.
	You can create a grounded port by connecting all wires at one end of a
	UTP cable to an earth ground point, and the other end to a female RJ-45
	connector located, for example, on a Switch rack or patch panel. The
	RJ-45 connector is now a grounded port.
Choosing the Correct	If your Switch has fiber ports you can choose from the following cable
Fiber Cables	options:
	■ The 1000BASE-SX ports can be connected to multimode fiber cables
	only.
	■ The 1000BASE-LX and 1000BASE-LH70 GBIC ports use multimode or
	single-mode fiber optic cables.
	CAUTION: 3Com recommends that you use MT-RJ cables that do not
	contain alignment pins as these are provided by the fiber socket. Cables
	that contain alignment pins can cause damage to your Switch.
	For detailed information on fiber cable specifications, refer to the
	SuperStack 3 Implementation Guide on the CD-ROM that accompanies
	your Switch.

If you wish to connect a 1000BASE-SX MT-RJ port to a fiber port with a different type of connector, for example, SC or ST please contact your network supplier for a suitable patch cable.

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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 Icon Description ConventionsConvention Description Documentation RelatedDocumentation documentation Please include the following information when commenting SuperStack 3 Switch 4900 Series Getting Started Guide3Com recommends that you copy the Docs/referenceguide Directory as a whole to maintain the structure of the filesIntroducing Introducing the Superstack 3 Switch 4900 Series Hardware Features Switches Switch Front View Detail Switch 4900 front viewSwitch 4924 front view Ports cross-over Power/Self Test LED Color Indicates Port Status LEDsModule Status LEDs Unit LEDsSwitch Rear Switch 4900 rear viewPower Socket Switch 4924 rear viewSupported by your Switch Default SettingsSwitch units, it is returned to these defaults Installing the Switch Choosing a Suitable Package ContentsSite Flow through the side panels of the Switch Rack-mountingDesk, or attach it to a wall Have been fittedRepeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack-mountingInterconnecting two Switch 4900 units Power-up Powering-upSwitch SequencePower System output RJ-45 connector is now a grounded port That contain alignment pins can cause damage to your SwitchYour Switch OptionsSwitch 4950 Gbic OperationApproved Gbic TransceiversFiber SC connector Type 4 Gbic with internal Eeprom fitted Inserting a Gbic Transceiver into a SwitchSwitch 4950 Gbic Operation Installing the Switch Setting UP for Management Setting Up OverviewManual IP Configuration Automatic IP ConfigurationSetting UP for Management Manually Configuring IP Information Pre-requisitesConfiguring the Workstation with IP Information Connecting the Workstation to the SwitchSetting Up the Switch with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu Connecting a workstation to the Switch via the console port 19,200 baud Data bitsSetting Up the Switch with IP Information Viewing Configured IPAutomatically 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 Command Line Network Using TelnetInterface Management CLI Management viaInterface Setting Up WebChoosing a Browser Over the Network Http//xxx.xxx.xxx.xxxDefault Users Setting Up SnmpPasswords User Default Name Password Access Level Security Device User Modify operation on the web interfaceProblem Solving For Technical Support information, see Appendix DSolving Problems Solutions belowPower LED does not light On powering-up, the Power/Self Test LED lights yellowProblems Solving HardwareFan failure warning message is received For further information about RMON, refer to StatusError message indicating that the Gbic transceiver is faulty Unit fails, no Snmp fan failure message is receivedSolving Communication Problems IP AddressingHow do you obtain a registered IP Address? Safety Information Important Safety Information This must be approved for the country where it is usedImportant Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX ’information de Sécurité Importante SchkoAppendix a Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Wichtige Sicherheitsinformationen Der Netzstecker muß die Norm CEE 7/7 erfüllen SchukoWichtige Sicherheitsinformationen Appendix a Safety Information Null Modem Cable 9-pin to RS-232 25-pin PC-AT Serial CablePin to 9-pin Connectors Modem CableRJ-45 Pin AssignmentsPin Number 10/100BASE-T 1000BASE-T Appendix B PIN-OUTS Physical Dimensions SafetyPower Consumption Same unless otherwise statedPower Supply Protocols Used for AdministrationHeat Dissipation Standards SupportedServices Online TechnicalUsername anonymous Asia, Pacific Rim From this region, emailEurope, Middle East and Africa From this region, enter the URLAsia, Pacific Rim Europe, Middle East and AfricaCountry Telephone Number Asia, Pacific Rim Country Telephone Number Latin America Index NumbersPasswords Regulatory Notices