HP J3188A manual Interpreting Port Status LEDs, Following table provides LED port information

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Installing the Hub

Interpreting LED Status

Interpreting Port Status LEDs

The following table provides LED port information.

	LED	State	Meaning of LED

	Twisted-pair	On	Link beat is detected from the attached node.
	Port (green)
	Port (green)	Off	The port is not receiving the link beat signal from the attached
		Off
			node.

		Slow	The port has been auto-partitioned. This port has been auto-
		Flash*	partitioned (disabled) due to excessive collisions. This port will
			reenable when the connected device no longer causes
			collisions.

	AUI	On	The AUI port is enabled.
	Port (green)
	Port (green)	Off	The AUI port is disabled.
		Off	The AUI port is disabled.

		Slow	The port has been auto-partitioned.
		Flash

* The slow flash is approximately once every 1.5 seconds.

Installing the Hub

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Contents HP J3188A Page HP 10Base-T Hub-16M J3188A Installation and Reference GuidePublication Number Iii HP 10Base-T Hub-16M J3188AFront of the Hub Back of the HubNetwork Connections FeaturesContents Cables and Connectors Vii Security InformationPage Installing the Hub Verify the hub operates correctly Installing and Configuring Your HubVerify included parts Connect the external transceiverTime Cord connected directly to the hub for proper operationPattern LEDRack or Cabinet Mounting Mount the hubTable Mounting Connect the hub to your network Twisted-Pair Cascade Connections Connecting Devices to the HubConnecting Hubs Together ThinLAN Connections InstallingOhm terminator Interpreting LED Status Connecting the Hub-16M to a Fiber-Optic BackboneInterpreting Hub Status LEDs Following table provides LED port information Interpreting Port Status LEDsPage Troubleshooting Approaches TroubleshootingProblem Solution Using a Checklist to Diagnose the HubTroubleshooting Using a Checklist to Diagnose the Hub LED Operation Hub will automatically recover after Troubleshooting LED OperationDiagnostic Tips Power CollClearing a Password for the Ascii Console Hub Maintenance TasksTesting the Hub Only Obtaining Firmware Enhancements Troubleshooting Hub Maintenance TasksRunning Connectivity Tests Managing the Hub Setting up the Ascii ConsoleManaging the Hub Directly, Using a Serial Cable and a TerminalRemotely, Using Telnet Starting the Console Remotely, Using a Modem and a TerminalSyntax Conventions on Help Screen Console Command ReferenceCommands are described in the rest of the chapter Example HE ST This displays help for the Status commandDefault Description BAckupRange CDpstatusCOunters Counter Name Definition Valid RangeDIsconnect IPconfigWhen to Use IPconfig Following table explains the IP parameters Configuring for Network ManagementUsing Novell NetWare IPX Using IPMAnagers SHow Parameter Default Value DefinitionTo end your editing CommandManager Address IP or IPX Receive Alarms? Table entry with ID 1 would now be a blank line Displays the other devices that are using CDP protocolMEssageinterval NEighborCommunity name PAsswordClear a password PIngRObustness REsetPOrt port ON/OFF SEcure portSHowCLear Security Configuration Parameter DefinitionsManaging the Hub Eavesdrop Prevention, must be set to on Configuring Security on a Single PortConfiguring Security on All Twisted-Pair Ports Address Selection Authorized Clearing Security Violation Indicators Showing the Security ConfigurationSTatus SPeed new speedStatus Information What It Means To send Network links, see the , TroubleshootingTEstlink 16M will respond with the correct packetPage Following table shows PC connections to the RS-232 port Cables and ConnectorsRecommended Cables Cable Function Cable Type HP Product Number Cables and ConnectorsFollowing table shows network connections to the hub Twisted-Pair Cable for Hub-to-Computer Network Connection Twisted-Pair Cable/Connector Pin-OutsPins 1 and 2 must be a twisted pair Pins 3 and 6 must be a twisted pairMinimum pin-out will function correctly RS-232 Connector and Cable Pin-OutsInstaller for assistance with your cabling requirements Cable pin-out described belowRS-232 Modem Cable SignalMinimum Cable Pinout for Ascii Console Connection Hub End MDI-X Twisted-Pair Cable Pin AssignmentsTwisted-Pair Straight-Through Cable Environmental SpecificationsPhysical ElectricalElectromagnetic ConnectorsSpecifications Megahertz XJ2288 Pcmcia card modem Modem ConfigurationUS Robotics Courier V.FC/V.34 Supra FAX Practical Peripherals PM288MT IIIntel 14.4EX Communication Between the Hub Network Management Station Network AddressingGlobally Assigned IP Network Addresses IPX Addressing for Novell NetWareIP Addresses for IP and Non-IP Networks IPX Addressing NotesCompany Name/Address Device IP ConfigurationCountry Bootp Process Using BootpDefinitions of the table entry fields Bootp Table File EntriesPage How Backup Links Work Backup LinksAdditional Notes Backup LinksLimitations Hub to a Server Examples of Backup LinksHow the Backup Function Works Hub to a SwitchHub can monitor only one link T e G g e s t i o nConfiguration/Installation Sequence Configuring a Backup LinkIndications of Backup Link Activation Identifying the Backup LinkReactivating the Primary Link Page Understanding Network Security Security InformationSecurity Information How Intruder Prevention WorksHow Eavesdrop Prevention Works Authorized MAC addressAssigning the Authorized MAC address Setting Inbound Security with Intruder Prevention Send Alarm Auto Port DisableSetting Outbound Security with Eavesdrop Prevention Security Information Page Mounting Precautions Safety and Regulatory StatementsEquipment and should be easily accessible Power PrecautionsTemperature might exceed 45C 113F Settings to configureGrounding Safety InformationTible de causer des dommages à léquipement Informations concernant la sécuritéHinweise zur Sicherheit Considerazioni sulla sicurezza Consideraciones sobre seguridad Safety Information Japanese Canada Regulatory StatementsFCC Class a Statement for U.S.A. Only European CommunityDeclaration of Conformity Index IndexDiagnosing with the LEDs … 2-2 diagnostic tests Late collision … 3-13 mounting the hub … LED description … Verifying hub operation … Page J3188-90001