HP J3188A manual Interpreting LED Status, Connecting the Hub-16M to a Fiber-Optic Backbone

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Installing the Hub

Interpreting LED Status

Connecting the Hub-16M to a Fiber-Optic Backbone

With an HP Fiber-Optic external transceiver for 10Base-FL networks, you can connect your hub to a fiber-optic backbone. The following illustration shows a hub with an HP Fiber-Optic external transceiver connected to a fiber-optic backbone:

Fiber-optic cable to a fiber-optic backbone

HP J2606A Fiber-Optic

For more information about cabling configuration, see the documentation accompanying the optional transceiver modules.

Interpreting LED Status

Two types of LEDs exist on the hub. They are:

■Hub Status LEDs. These LEDs reflect certain conditions that exist on the hub at large and are not explicitly referring to a given port.

■Port Status LEDs. These LEDs reflect basic conditions (for example, Link Beat being enabled) that exist on a specific port.

Status information for both are described in the following tables.

Installing the Hub

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Contents HP J3188A Page HP 10Base-T Hub-16M J3188A Installation and Reference GuidePublication Number Front of the Hub HP 10Base-T Hub-16M J3188ABack of the Hub IiiNetwork Connections FeaturesContents Cables and Connectors Vii Security InformationPage Installing the Hub Verify included parts Installing and Configuring Your HubConnect the external transceiver Verify the hub operates correctlyTime Cord connected directly to the hub for proper operationPattern LEDRack or Cabinet Mounting Mount the hubTable Mounting Connect the hub to your network Connecting Devices to the Hub Connecting Hubs TogetherTwisted-Pair Cascade Connections 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 TroubleshootingUsing a Checklist to Diagnose the Hub Troubleshooting Using a Checklist to Diagnose the HubProblem Solution LED Operation Diagnostic Tips Troubleshooting LED OperationPower Coll Hub will automatically recover afterHub Maintenance Tasks Testing the Hub OnlyClearing a Password for the Ascii Console Troubleshooting Hub Maintenance Tasks Running Connectivity TestsObtaining Firmware Enhancements Managing the Hub Setting up the Ascii ConsoleDirectly, Using a Serial Cable and a Terminal Remotely, Using TelnetManaging the Hub Starting the Console Remotely, Using a Modem and a TerminalCommands are described in the rest of the chapter Console Command ReferenceExample HE ST This displays help for the Status command Syntax Conventions on Help ScreenDefault Description BAckupCOunters CDpstatusCounter Name Definition Valid Range RangeIPconfig When to Use IPconfigDIsconnect Using Novell NetWare IPX Configuring for Network ManagementUsing IP Following table explains the IP parametersMAnagers SHow Parameter Default Value DefinitionCommand Manager Address IP or IPX Receive Alarms?To end your editing MEssageinterval Displays the other devices that are using CDP protocolNEighbor Table entry with ID 1 would now be a blank lineClear a password PAsswordPIng Community nameREset POrt port ON/OFFRObustness SEcure portSHowCLear Security Configuration Parameter DefinitionsManaging the Hub Configuring Security on a Single Port Configuring Security on All Twisted-Pair PortsEavesdrop Prevention, must be set to on Address Selection Authorized Clearing Security Violation Indicators Showing the Security ConfigurationSTatus SPeed new speedStatus Information What It Means TEstlink Network links, see the , Troubleshooting16M will respond with the correct packet To sendPage Cables and Connectors Recommended CablesFollowing table shows PC connections to the RS-232 port Cables and Connectors Following table shows network connections to the hubCable Function Cable Type HP Product Number Pins 1 and 2 must be a twisted pair Twisted-Pair Cable/Connector Pin-OutsPins 3 and 6 must be a twisted pair Twisted-Pair Cable for Hub-to-Computer Network ConnectionInstaller for assistance with your cabling requirements RS-232 Connector and Cable Pin-OutsCable pin-out described below Minimum pin-out will function correctlySignal Minimum Cable Pinout for Ascii Console ConnectionRS-232 Modem Cable Twisted-Pair Cable Pin Assignments Twisted-Pair Straight-Through CableHub End MDI-X Physical SpecificationsElectrical EnvironmentalConnectors SpecificationsElectromagnetic Modem Configuration US Robotics Courier V.FC/V.34Megahertz XJ2288 Pcmcia card modem Practical Peripherals PM288MT II Intel 14.4EXSupra FAX Communication Between the Hub Network Management Station Network AddressingIP Addresses for IP and Non-IP Networks IPX Addressing for Novell NetWareIPX Addressing Notes Globally Assigned IP Network AddressesDevice IP Configuration CountryCompany Name/Address Bootp Process Using BootpDefinitions of the table entry fields Bootp Table File EntriesPage How Backup Links Work Backup LinksBackup Links LimitationsAdditional Notes How the Backup Function Works Examples of Backup LinksHub to a Switch Hub to a ServerHub 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 InformationHow Eavesdrop Prevention Works How Intruder Prevention WorksAuthorized MAC address Security InformationAssigning 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 StatementsTemperature might exceed 45C 113F Power PrecautionsSettings to configure Equipment and should be easily accessibleGrounding Safety InformationTible de causer des dommages à léquipement Informations concernant la sécuritéHinweise zur Sicherheit Considerazioni sulla sicurezza Consideraciones sobre seguridad Safety Information Japanese FCC Class a Statement for U.S.A. Only Regulatory StatementsEuropean Community CanadaDeclaration 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