3Com DUA1770-0AAA04 manual Rack-mounting, Desk, or attach it to a wall, Have been fitted

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Rack-mounting 23

■ The air is as free from dust as possible.

■ The unit is installed in a clean, air conditioned environment.

■ No more than four Switch units are placed on top of one another, if the units are free-standing.

	■ The Switch is situated away from sources of conductive (electrical)
	dust, for example laser printers.
	■ The AC supply used by the Switch is separate to that used by units
	that generate high levels of AC noise, for example air conditioning
	units and laser printers.

Rack-mounting	The Switch is 1.5U and will fit in most standard 19-inch racks. However,
	as each Switch requires a shelf or runner to support its weight, you may
	need to allow a 2U space within the rack for each Switch.
	WARNING: The Switch should only be used in a rack if it is mounted on
	runners, a shelf, or a tray to support the weight. The rack-mount kits
	alone are not sufficient to support the weight of the switch. The rack-
	mount kits must not be used to suspend the Switch from under a table or
	desk, or attach it to a wall.
	CAUTION: Disconnect all cables from the Switch before continuing.
	Remove all self adhesive pads from the underside of the Switch if they
	have been fitted.
	CAUTION: You must use a shelf or support that will not obstruct the air
	flow through the side panels of the Switch.
	To rack-mount your Switch:
	1 Place the Switch the right way up on a hard flat surface, with the front
	facing towards you.
	2 Locate a securing bracket over the mounting holes on one side of the
	Switch, as shown in Figure 9.
	3 Insert the three screws and tighten with a suitable screwdriver.

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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 Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation 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 SocketSwitch units, it is returned to these defaults Default SettingsSupported by your Switch Installing the Switch Site Package ContentsChoosing a Suitable 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 InformationSetting Up the Switch with IP Information Connecting the Workstation to the SwitchConfiguring the Workstation 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 Automatically Configured IPViewing 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 ManagementChoosing a Browser Setting Up WebInterface Http//xxx.xxx.xxx.xxx Over the NetworkPasswords Setting Up SnmpDefault Users 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 Pin to 9-pin PC-AT Serial CableNull Modem Cable 9-pin to RS-232 25-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