Cabletron Systems SEH-32, SEH-34, SEH-24 manual Delay, Crosstalk, Noise, Temperature

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

Delay

The maximum propagation delay of a 10BASE-T link segment must not exceed 1000 nsec. This 1000 nsec. maximum delay limits the maximum link segment length to no greater than 200 meters.

Crosstalk

Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-pair cable bundle. 10BASE-T transceivers are designed so that the user does not need to be concerned about cable crosstalk, provided the cable meets all other requirements.

Noise

Noise can be caused by either crosstalk or externally induced impulses. Impulse noise may cause data errors if the impulses occur at very specific times during data transmission. Generally, the user need not be concerned about noise. If noise-related data errors are suspected, it may be necessary to either reroute the cable or eliminate the source of the impulse noise.

Temperature

Multi-pair PVC 24 AWG telephone cables typically have an attenuation of approximately 8 to 10 dB/100m at 20°C (78°F). The attenuation of PVC insulated cable varies significantly with temperature. At temperatures greater than 40°C (104°F), we strongly recommend that you use plenum-rated cables to ensure that cable attenuation remains within specification.

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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