3Com Hub 1000 SX 1 Downlink Connections, Connector, Maximum Cable, Cable Type, Length Meters

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Table 2-1Downlink Connections

Interpreting Hub Indicators 2-5

Table 2-1Downlink Connections

Connector		Maximum Cable
Type	Cable Type	Length (Meters)

SC	Short-wavelength (850 nm) fiber-optic:
	62.5/125 ∝ MMF	260
	50/125 ∝ MMF	550

7Apply power to the hub in either of these ways:

■Plug one end of the power cord into the AC input socket and the other end into a power source.

■Connect the hub to a power supply, as described in “Using Optional Power Systems” later in this chapter.

Placing on a Desktop If you place the hub on a desk or table, attach the supplied rubber feet to each bottom corner of the hub. Remove the protective cap from each downlink port and attach the proper cable to make the desired network connection. (For connector and cable information, see Table 2-1. For guidelines on making typical connections, see Chapter 3.) Apply power to the hub in either of these ways:

■Plug one end of the power cord into the AC input socket and the other end into a power source.

■Connect the hub to a power supply, as described in “Using Optional Power Systems” later in this chapter.

Interpreting Hub When power is applied, all the indicators on the front panel light

Indicatorsmomentarily. The UNIT STATUS LED is amber while POST is running. After approximately 30 seconds, the UNIT STATUS LED turns green. Verify that the PWR (power) LED remains lit, indicating that the hub is receiving power.

For explanations of the hub indicators, see Table 2-2.

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Contents SuperStack II Hub 1000 SX User GuideA member of the 3Com SuperStack II System UNITED STATES GOVERNMENT LEGENDS 3Com Corporation 5400 Bayfront Plaza Santa Clara, CaliforniaCONTENTS 2 INSTALLING THE HUBABOUT THIS GUIDE 1 INTRODUCTION A USING THE CONSOLE PORT 3 MAKING CONNECTIONSPOST Messages GLOSSARY INDEX 3COM CORPORATION LIMITED WARRANTY SPECIFICATIONSTECHNICAL SUPPORT FCC CLASS A VERIFICATION STATEMENTPage FIGURES Page Port Conﬁguration Menu TABLESPage Icon ABOUT THIS GUIDENotice Type DescriptionSETDEFAULT !0 -IP NETaddr = CommandsMenu commands and buttonsINTRODUCTION Hub 1000 SXGeneral Description and Uplink DownlinksFull-Duplex OperationFlow Control Functions Features andSuperStack II Hub 1000 SX User Guide INSTALLING THE HUBHub Description The hub’s front and rear panels are shown in Figure Connecting the Hub Installing and4 Repeat steps 2 and 3 for the other side of the hub Table 2-1 Downlink Connections ConnectorMaximum Cable TypeIndicator Table 2-2 Hub 1000 SX IndicatorsColor StatusConnecting a GBIC ModuleThe gigabit interface connector GBIC port on the rear panel of the Power Systems Using OptionalCabling Options Power ModulesTable 2-4 Advanced RPS Conﬁguration Options A hub connects to a UPS unit through the hub’s AC power cordYou can connect a UPS unit to an Advanced RPS unit as long as you do not exceed the maximum wattage 325 watts for the UPS unit. To verify that the UPS unit’s maximum wattage is not exceeded, calculate the total power consumption of all units connected to the Advanced RPS. If the result is less than 325 watts, your conﬁguration is safe if the result is greater than 325 watts, then there are too many units connected to the Advanced RPS Page Table 3-1 Gigabit Ethernet Maximum Cable Lengths MAKING CONNECTIONSAggregating Power WorkgroupServers connecting to the network backbone. See FigureSwitches The Hub 1000 SX does not support bandwidth aggregation trunkingYou can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps 3-4 CHAPTER 3 MAKING CONNECTIONS Figure 3-3 Aggregated Switches ConnectionConnecting Figure 3-4 Mixed ConnectionThe best use of the hub uplink is as a backbone connection to a 3Com Table 3-2 Troubleshooting Tips Figure 3-6 Uplink Connection to a 10/100 Mbps SwitchSymptom SolutionUSING THE CONSOLE PORT With Power Connecting theRequirements Console PortTo connect the console port when the hub is disconnected from powerConnecting the Console Port A-3 DisconnectedLogging On message, return the hub to the supplierAfter 4 minutes of inactivity, the CLI logs off automatically Port Settings PasswordChanging the ConﬁguringTo display the Port Conﬁguration menu Table A-2 Port Conﬁguration Menu Configuring Port SettingsA-8 APPENDIX A USING THE CONSOLE PORT Configuring Port Settings and be conﬁgured to receive pause frames Configuring Port Settings A-11 Hub Status Displayingmatrix, Y indicates yes and n indicates no. See Table A-3 Table A-3 Hub Status InformationDisplaying Hub Status A-13 A-14 APPENDIX A USING THE CONSOLE PORT Restoring the Factory Default SettingsFirmware Image Updating theentering option Checking theXmodem-CRC To transfer the ﬁrmware image ﬁle during a ﬁrmware update, the CLI displays the following message Logging Offlog in again. To restart the ﬁle transfer, repeat steps 6 and Table A-4 File Transfer Error Messages Table A-5 Fatal Error MessagesWhile saving port settings or SPECIFICATIONS Physical DimensionsEnvironmental Operating Ranges Page Board Service ServicesTECHNICAL SUPPORT Online TechnicalAccess by Digital Modem Access by Analog Modem1 408 654 C-2 APPENDIX C TECHNICAL SUPPORTLocal access numbers are available within the following countries Czech Republic/Slovak Santa Clara, CaliforniaCentral European HQ 305 261 3266 Miami, FloridaTo obtain an RMA number, call or fax Page GLOSSARY cable is based on CSMA/CD Carrier Sense Multiple Access/Collision Carrier Sense Multiple Access/Collision Detection. Channel accessaccess method transmission of light signalsincoming IEEEﬂow control Mbpscontrol. See also asymmetric ﬂow control, ﬂow control, pause frame Symbols INDEXNumbers Page Switch 9300 3-2, 3-3 Page STANDARD WARRANTY SERVICE 3Com Corporation LIMITED WARRANTYHARDWARE SOFTWAREFCC CLASS A VERIFICATION STATEMENT LIMITATION OF LIABILITYGOVERNING LAW