Compaq HB1004 manual Power and Cooling Problems, Installation, Port and Cable Assignments

Page 37

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-2Troubleshooting

Power and Cooling Problems

If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply as explained in the previous section. However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and verify that the fan on back of the unit was unobstructed and running prior to shutdown. If you still cannot isolate the problem, then the internal power supply may be defective. In this case, contact Compaq Technical Support at 1678-23143.

Installation

Verify that all system components have been properly installed. If one or more components appear to be malfunctioning (e.g., the power cord or network cabling), test them in an alternate environment where you are sure that all the other components are functioning properly.

Port and Cable Assignments

RJ-45 hub ports (MDI-X) can be attached to any device that uses a standard network interface (e.g., a workstation or server). Similar networking devices (e.g., another hub or switch) can be cascaded by connecting any of the RJ-45 ports (MDI-X) on the HB1004 hub to an MDI port on the other device. You can also set Port 4 on the HB1004 hub to MDI and connect to an MDI-X port on the other device. Use 100Ω Category 3, 4, or 5 twisted-pair cable, unshielded or shielded (UTP/STP), for all RJ-45 connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).

Image 37

Contents HB1004 10BASE-T HUB Compaq HB1004 10Base-T Hub User Guide Contents Appendix a Appendix C Overview FeaturesPackage Contents Hub Components LED IndicatorsRJ-45 Ports Serial COM PortHub LED Conditions and Descriptions Unit LEDsStatus Description Port LEDs MDI/MDI-X Slide SwitchPort LED Conditions and Descriptions Mounting the Hub InstallationMounting the Hub on a Flat Surface Mounting the Hub in a Rack Making a Connection via an MDI-X Port Connecting the Hub SystemMaking a Connection via the MDI/MDI-X Port Port Powering On the HubConnecting the Power Cord LED Diagnostic Test Functions Diagnostic TestsTest Function/Component State Indication Hub and Port LED IndicatorsApplications 7A Sample Application Using the HB1004 10Base-T Ethernet HubPreparing for Configuration Management Setup and ConfigurationOut-of-Band Connection Onsite ConnectionModem Connection In-Band Connection Starting the Configuration Program4Setup and Configuration Open box 6Setup and Configuration Main Menu Compaq HB1004 System ConfigurationCommon Menu Functions Main MenuMenu Item Description Common Menu Key Functions System Configuration SettingsFunction Displaying System Information 10Setup and ConfigurationSystem Configuration Screen Changing System ConfigurationInvalid Assigning Trap ManagersNetwork Performance Configuring Port ParametersDownloading System Software 14Setup and ConfigurationSaving a New Configuration Reverting Configuration to Factory SettingsResetting the Configuration Restarting the AgentHB1004 10Base-T Ethernet Hub SpecificationsManagement Support Network CriteriaDiagnosing Hub Indicators TroubleshootingTable B-1 Diagnosing Hub Indicators Symptom Cause SolutionInstallation Power and Cooling ProblemsPort and Cable Assignments Table B-2 RJ-45 Port Pin Assignments Twisted Pair CablePin Configuration Using Diagnostic ModeTable B-3 Factory Default Settings Factory SettingsDescription MIB Object Factory Setting DownloadExit Certification and Compliance Safety ComplianceEuropean Union EU Notice Wichtige Sicherheitshinweise Germany2Certification and Compliance LED Index2Index