Cabletron Systems SEH-32, SEH-34, SEH-24 manual Chapter Troubleshooting, Installation CHECK-OUT

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TROUBLESHOOTING

CHAPTER 5

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.

5.1INSTALLATION CHECK-OUT

After you connect the SEH to the network, verify that packets pass between all Ethernet devices connected to the SEH and any other devices connected to the network. If you encounter difﬁculty with any of the attached devices, check the link as follows:

1.Check that the LNK LED, if applicable, for the port is on. If the LED is not on:

a.Check that the 10BASE-T device at the other end of the twisted pair segment is powered up.

b.Verify that the connector on the twisted pair segment has the proper pinouts. Refer to Chapter 2 for the pin assignments for twisted pair connectors.

For EPIM-F1/EPIM-F2/EPIM-F3 check that the TX and RX fibers are properly connected.

c.Check the cable for continuity. A variety of tools are available for this test, depending on the media you are using.

d.Check that the twisted pair segments meet cable specifications for dB loss described in Chapter 2.

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Contents 10BASE-T Stackable HUB USER’S Guide Printed On Recycled Paper DOC Notice FCC NoticeCabletron Software Program License Cabletron SYSTEMS, INC Program License AgreementUnited States Government Restricted Rights Exclusion of Warranty Disclaimer of LiabilityTable of Contents Appendix B Twisted Pair Wiring Tables A-1 Contents InstallationConnecting to the Network TroubleshootingChapter Introduction Using this ManualSEH Overview Introduction Getting HelpSEH Features Repeater FunctionalityPolarity Detection and Correction Optional Features Stackable CapabilitiesEpim Rack Mount or Wall Mount Hardware Daughter Board Upgrade KitHubSTACK Interconnect Cables Part Description Application NumberHubSTACK Interconnect Cable Requirements Cable SpecificationsJitter LengthInsertion Loss ImpedanceNoise DelayTemperature CrosstalkCable Type Attenuation Maximum Cable Length Fiber Optic Budget and Propagation DelayInstallation REQUIREMENTS/SPECIFICATIONS Terminators ConnectorsThin-net Network Requirements for the EPIM-C Module Cable TypeNetwork Port Specifications AUI Cable Requirements for the EPIM-A and EPIM-X ModulesAUI Cable SEH-32 and SEH-34 Network Port Speciﬁcations SEH-22 and SEH-24 Network Port SpeciﬁcationsPin Champ Connector EPIM-T Installation REQUIREMENTS/SPECIFICATIONS Epim SpecificationsParameter Typical Worst Worst Case Typical Value Budget EPIM-F1/F2EPIM-F3 EPIM-F3Parameter Typical Minimum Maximum EPIM-C Connector TypeEPIM-A and EPIM-X EPIM-A and EPIM-X AUI PortGeneral Operating SpecificationsDelay Times Start of Packets Delay Times JAMJAM Output Fault ProtectionPower Supply Requirements Output Min. Load Max. Load Max PowerPhysical SafetyUnpacking the SEH Installing the SEHStacking the SEH SEH-2410BASE-T HUB with Lanview Disconnect SEH and Sehi Interconnect Cables At the OUT Port Attaching the Strain Relief BracketRack Mounting the SEH Installing the SEH in the RackWall Mounting the SEH Shelf or Table-top Installation Free-Standing InstallationInstallation Connecting the SEH to the Power Source Connecting Network Ports SEH-22 and SEH-24 Connecting the SEH to the NetworkEPIM-2 Connecting Network Ports SEH-32 and SEH-34 EPIM-T Cross-over Switch Connecting a UTP Segment to an EPIM-TConnecting to the Network Connecting to the Network Connecting to the Network Connecting a Thin-Net Segment to an EPIM-C EPIM-C EPIM-A Connecting an AUI Cable to an EPIM-AConnecting an AUI Cable to an EPIM-X On Position Toward Back Epim OFF Position Toward Front Finishing the InstallationInstallation CHECK-OUT Chapter TroubleshootingUsing Lanview Mgmt Green Flashing PWR GreenCLN Red RCV Yellow FlashingLNK Green Twisted Pair Wiring Tables Appendix a Twisted Pair Wiring TablesA-2 A-3 A-4 From Punch Down To RJ-45 Into Block Wallplate Ofﬁce 10BASE-TDrop Device A-6 A-7 Champ Down Block If Required Ethernet Device SEH-32/34 Punch Wall PlateFigure A-1. Punch Down Block A-9 French Power Supply CordGerman Spanish