Cabletron Systems SEHI-22 manual Thin-Net Network Requirements for the EPIM-C Module, Cable Type

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.5Thin-Net Network Requirements for the EPIM-C Module

When you connect a thin-net segment to the SEHI (via an EPIM-C), your network must meet the following requirements:

Cable Type

50 ohm RG-58A/U type coaxial cable must be used when making up a thin-net cable segment.

Length

The thin-net segment must be no longer than 185 meters.

Terminators

A 50 ohm terminator must be connected to the far end of each thin-net segment.

Connectors

A maximum of 29 tee-connectors may be used throughout the length of cable segment for host connections. If an excessive number of barrel connectors are used within the cable segment, such as ﬁnished wall plates with BNC feed-throughs, then a reduced number of host connections may be required. For special network design, contact Cabletron Systems Technical Support.

Grounding

For safety, ground only one end of a thin-net segment. Do NOT connect EPIM BNC ports to earth ground.

Warning: Connecting a thin-net segment to earth ground at more than one point could produce dangerous ground currents.

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Contents 10BASE-T Intelligent 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 Installation Connecting to the NetworkTroubleshooting Local ManagementContents Appendix B Twisted Pair Wiring Tables A-1 Using this Manual Chapter IntroductionIntroduction Getting Help Sehi OverviewSehi Features Repeater FunctionalityPolarity Detection and Correction Flash EEPROMsReset Button Lanview LEDsLocal Management Stackable CapabilitiesIntroduction Optional Features EpimRelated Manuals Daughter Board Upgrade KitRack Mount or Wall Mount Hardware Cable Specifications HubSTACK Interconnect Cable RequirementsLength Insertion LossImpedance JitterDelay TemperatureCrosstalk NoiseFiber Optic Budget and Propagation Delay Cable Type Attenuation Maximum Cable LengthInstallation REQUIREMENTS/SPECIFICATIONS Connectors Thin-Net Network Requirements for the EPIM-C ModuleCable Type TerminatorsAUI Cable Network Port SpecificationsAUI Cable Requirements for the EPIM-A and EPIM-X Modules SEHI-22 and SEHI-24 Network Port Speciﬁcations SEHI-32 and SEHI-34 Network Port SpeciﬁcationsPin Champ Connector Installation REQUIREMENTS/SPECIFICATIONS Epim Specifications EPIM-TEPIM-F1 and EPIM-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-XCOM Transceiver RequirementsDelay Times Start of Packets Delay Times JAMGeneral PreambleFault Protection Power Supply RequirementsOutput Min. Load Max. Load Max Power JAM OutputSafety PhysicalInstalling the Sehi Unpacking the SehiStacking the Sehi Stacking the Sehi Attaching the Strain Relief Bracket Disconnect SEH and Sehi Interconnect Cables At the OUT PortInstalling the Sehi in the Rack Rack Mounting the SehiWall Mounting the Sehi Free-Standing Installation Shelf or Table-top InstallationInstallation Connecting the Sehi to the Power Source Connecting the Sehi to the Network Connecting to Network Ports, SEHI-22 and SEHI-24EPIM-2 Connecting to Network Ports, SEHI-32 and SEHI-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 CPUTroubleshooting CLN Using the Reset ButtonRCV LNKChapter Local Management Local Management Management Terminal Requirements Console Cable Conﬁguration Management Terminal ConnectionManagement Terminal Setup Parameters Menu Function Selection Display SetupGeneral Setup SetupLocal Management Accessing Local Management Sehi Local ManagementFeature Selection Screen Local Management Using the Local Management Screens Community Name Table ScreenAccess Community NameEditing the Community Name Field Conﬁguration Screen IP AddressDefault Gateway Port Enable OverrideSetting the IP Address SubNet MaskSetting the Subnet Mask Setting the Default Gateway Using the Port Enable OverrideExiting the Configuration Screen Trap Table ScreenConfiguring the Trap Table Snmp Community NameTraps Trap IP AddressExiting the Trap Table Screen Snmp Tools ScreenOID Prepend GetSet Get NextWalk Recall-OIDStep CyclesGetting Individual OIDs Getting the Next OIDSetting an OID Viewing Multiple OIDsCycling Through OIDs Walking Through OIDsStepping Through OIDs Exiting the Snmp Tools Screen Device Statistics ScreenErrors Received CRC ErrorsAlignment Errors Port Admin. StatusEnable Port Disable PortUpdate-Freq Port Seg. StatusUsing the Enable Port Command Selecting the Appropriate Module/PortUsing the Disable Port Command Exiting the Device Statistics ScreenAppendix a Twisted Pair Wiring Tables Twisted Pair Wiring TablesA-2 A-3 A-4 Drop Device From Punch Down To RJ-45 Into Block Wallplate Ofﬁce10BASE-T A-6 A-7 SEHI-32/34 Punch Wall Plate Champ Down Block If Required Ethernet DeviceFigure A-1. Punch Down Block A-9 Power Supply Cord GermanSpanish French