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Cabletron Systems SEHI-34, SEHI-22, SEHI-32, SEHI-24 manual Installation REQUIREMENTS/SPECIFICATIONS

Models: SEHI-24 SEHI-32 SEHI-34 SEHI-22

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.4Single Mode Fiber Optic Cable Speciﬁcations for the EPIM-F3 Module

Table 2-2 shows Single Mode Fiber Optic Cable speciﬁcations for the EPIM-F3.

Table 2-2. Single Mode Fiber Optic Cable Specifications

Cable Type	Attenuation	Maximum Cable Length


8/125-12/125 ∝m	10.0 dB or less	The maximum allowable fiber
		optic cable length is
		5 km (3.1 miles) with bridges
		at each segment end. Howev-
		er, IEEE 802.3 FOIRL specifi-
		cations specify a maximum of
		1 km (1093.6 yards).

Attenuation

You must test the ﬁber optic cable with a ﬁber optic attenuation test set adjusted for an 1300 nm wavelength. This test veriﬁes that the signal loss in a cable is 10.0 dB or less for any given single mode ﬁber optic link.

Fiber Optic Budget and Propagation Delay

Fiber optic budget is the combination of the optical loss due to the ﬁber optic cable, in-line splices, and ﬁber optic connectors. When determining the maximum ﬁber optic cable length, the ﬁber optic budget (total loss of 10.0 dB or less between stations) and total network propagation delay should be calculated and considered before ﬁber optic cable runs are incorporated in any network design.

Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network is 25.6 ∝sec, if the total propagation delay between any two nodes on the network exceeds 25.6 ∝sec, then bridges should be used.

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Cabletron Systems SEHI-34, SEHI-22, SEHI-32, SEHI-24 manual Installation REQUIREMENTS/SPECIFICATIONS

Contents

10BASE-T Intelligent 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 Local Management InstallationConnecting to the Network TroubleshootingContents Appendix B Twisted Pair Wiring Tables A-1 Chapter Introduction Using this ManualSehi Overview Introduction Getting HelpFlash EEPROMs Sehi FeaturesRepeater Functionality Polarity Detection and CorrectionStackable Capabilities Reset ButtonLanview LEDs Local ManagementEpim Introduction Optional FeaturesRack Mount or Wall Mount Hardware Daughter Board Upgrade KitRelated Manuals HubSTACK 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 TypeAUI Cable Requirements for the EPIM-A and EPIM-X Modules Network Port SpecificationsAUI Cable SEHI-32 and SEHI-34 Network Port Speciﬁcations SEHI-22 and SEHI-24 Network Port SpeciﬁcationsPin Champ Connector EPIM-T Installation REQUIREMENTS/SPECIFICATIONS Epim SpecificationsParameter Typical Worst Worst Case Typical Value Budget EPIM-F1 and EPIM-F2EPIM-F3 EPIM-F3Parameter Typical Minimum Maximum EPIM-C Connector TypeEPIM-A and EPIM-X EPIM-A and EPIM-X AUI PortTransceiver Requirements COMPreamble Delay Times Start of PacketsDelay Times JAM GeneralJAM Output Fault ProtectionPower Supply Requirements Output Min. Load Max. Load Max PowerPhysical SafetyUnpacking the Sehi Installing the SehiStacking the Sehi Stacking the Sehi Disconnect SEH and Sehi Interconnect Cables At the OUT Port Attaching the Strain Relief BracketRack Mounting the Sehi Installing the Sehi in the RackWall Mounting the Sehi Shelf or Table-top Installation Free-Standing InstallationInstallation Connecting the Sehi to the Power Source Connecting to Network Ports, SEHI-22 and SEHI-24 Connecting the Sehi to the NetworkEPIM-2 Connecting to Network Ports, SEHI-32 and SEHI-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 CPU PWRLNK Troubleshooting CLNUsing the Reset Button RCVChapter Local Management Local Management Management Terminal Requirements Management Terminal Connection Console Cable ConﬁgurationSetup Management Terminal Setup ParametersMenu Function Selection Display Setup General SetupSehi Local Management Local Management Accessing Local ManagementFeature Selection Screen Community Name Table Screen Local Management Using the Local Management ScreensCommunity Name AccessEditing the Community Name Field IP Address Conﬁguration ScreenSubNet Mask Default GatewayPort Enable Override Setting the IP AddressSetting the Subnet Mask Using the Port Enable Override Setting the Default GatewayTrap Table Screen Exiting the Configuration ScreenTrap IP Address Configuring the Trap TableSnmp Community Name TrapsSnmp Tools Screen Exiting the Trap Table ScreenGet Next OID PrependGet SetCycles WalkRecall-OID StepGetting the Next OID Getting Individual OIDsViewing Multiple OIDs Setting an OIDStepping Through OIDs Walking Through OIDsCycling Through OIDs Device Statistics Screen Exiting the Snmp Tools ScreenPort Admin. Status Errors ReceivedCRC Errors Alignment ErrorsPort Seg. Status Enable PortDisable Port Update-FreqSelecting the Appropriate Module/Port Using the Enable Port CommandExiting the Device Statistics Screen Using the Disable Port CommandTwisted Pair Wiring Tables Appendix a Twisted Pair Wiring TablesA-2 A-3 A-4 10BASE-T From Punch Down To RJ-45 Into Block Wallplate OfﬁceDrop Device A-6 A-7 Champ Down Block If Required Ethernet Device SEHI-32/34 Punch Wall PlateFigure A-1. Punch Down Block A-9 French Power Supply CordGerman Spanish