Cabletron Systems SEH-32, SEH-34, SEH-24 manual CLN Red, RCV Yellow Flashing, LNK Green

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TROUBLESHOOTING

CLN (Red)

This LED indicates that a collision has occurred on one of the ports.

RCV (Yellow Flashing)

When this LED ﬂashes, it indicates that the SEH is receiving data packets from the associated port segment. Each SEH port has a corresponding RCV LED:

•Network Ports: RCV LEDs 1-24

•EPIM-1: RCV LED E1

•EPIM-2: RCV LED E2

LNK (Green)

When a LNK LED is on, it indicates an established link between the associated twisted pair segment and the 10BASE-T device at the other end of the segment. LNK LEDs will remain on as long as a link is maintained. Each SEH Network Port (ports 1-24) has a corresponding

LNK LED.

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Contents 10BASE-T Stackable HUB USER’S Guide Printed On Recycled Paper FCC Notice DOC NoticeCabletron SYSTEMS, INC Program License Agreement Cabletron Software Program LicenseExclusion of Warranty Disclaimer of Liability United States Government Restricted RightsTable of Contents Troubleshooting Contents InstallationConnecting to the Network Appendix B Twisted Pair Wiring Tables A-1Using this Manual Chapter IntroductionIntroduction Getting Help SEH OverviewSEH Features Repeater FunctionalityPolarity Detection and Correction Optional Features Stackable CapabilitiesEpim Part Description Application Number Daughter Board Upgrade KitHubSTACK Interconnect Cables Rack Mount or Wall Mount HardwareCable Specifications HubSTACK Interconnect Cable RequirementsImpedance LengthInsertion Loss JitterCrosstalk DelayTemperature NoiseFiber Optic Budget and Propagation Delay Cable Type Attenuation Maximum Cable LengthInstallation REQUIREMENTS/SPECIFICATIONS Cable Type ConnectorsThin-net Network Requirements for the EPIM-C Module TerminatorsNetwork Port Specifications AUI Cable Requirements for the EPIM-A and EPIM-X ModulesAUI Cable SEH-22 and SEH-24 Network Port Speciﬁcations SEH-32 and SEH-34 Network Port SpeciﬁcationsPin Champ Connector Installation REQUIREMENTS/SPECIFICATIONS Epim Specifications EPIM-TEPIM-F1/F2 Parameter Typical Worst Worst Case Typical Value BudgetEPIM-F3 EPIM-F3Parameter Typical Minimum Maximum Connector Type EPIM-CEPIM-A and EPIM-X AUI Port EPIM-A and EPIM-XDelay Times JAM Operating SpecificationsDelay Times Start of Packets GeneralOutput Min. Load Max. Load Max Power Fault ProtectionPower Supply Requirements JAM OutputSafety PhysicalInstalling the SEH Unpacking the SEHStacking the SEH SEH-2410BASE-T HUB with Lanview Attaching the Strain Relief Bracket Disconnect SEH and Sehi Interconnect Cables At the OUT PortInstalling the SEH in the Rack Rack Mounting the SEHWall Mounting the SEH Free-Standing Installation Shelf or Table-top InstallationInstallation Connecting the SEH to the Power Source Connecting the SEH to the Network Connecting Network Ports SEH-22 and SEH-24EPIM-2 Connecting Network Ports SEH-32 and SEH-34 Connecting a UTP Segment to an EPIM-T EPIM-T Cross-over SwitchConnecting to the Network Connecting to the Network Connecting to the Network Connecting a Thin-Net Segment to an EPIM-C EPIM-C Connecting an AUI Cable to an EPIM-A EPIM-AConnecting an AUI Cable to an EPIM-X Finishing the Installation On Position Toward Back Epim OFF Position Toward FrontChapter Troubleshooting Installation CHECK-OUTUsing Lanview PWR Green Mgmt Green FlashingCLN Red RCV Yellow FlashingLNK Green Appendix a Twisted Pair Wiring Tables 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 SEH-32/34 Punch Wall Plate Champ Down Block If Required Ethernet DeviceFigure A-1. Punch Down Block A-9 Spanish Power Supply CordGerman French