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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 Notice Cabletron Software Program License Cabletron SYSTEMS, INC Program License Agreement United States Government Restricted Rights Exclusion of Warranty Disclaimer of Liability Table of Contents Local Management InstallationConnecting to the Network Troubleshooting Contents Appendix B Twisted Pair Wiring Tables A-1 Chapter Introduction Using this Manual Sehi Overview Introduction Getting Help Flash EEPROMs Sehi FeaturesRepeater Functionality Polarity Detection and Correction Stackable Capabilities Reset ButtonLanview LEDs Local Management Epim Introduction Optional Features Rack Mount or Wall Mount Hardware Daughter Board Upgrade KitRelated Manuals HubSTACK Interconnect Cable Requirements Cable Specifications Jitter LengthInsertion Loss Impedance Noise DelayTemperature Crosstalk Cable Type Attenuation Maximum Cable Length Fiber Optic Budget and Propagation Delay Installation REQUIREMENTS/SPECIFICATIONS Terminators ConnectorsThin-Net Network Requirements for the EPIM-C Module Cable Type AUI 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 Speciﬁcations Pin Champ Connector EPIM-T Installation REQUIREMENTS/SPECIFICATIONS Epim Specifications Parameter Typical Worst Worst Case Typical Value Budget EPIM-F1 and EPIM-F2 EPIM-F3 EPIM-F3 Parameter Typical Minimum Maximum EPIM-C Connector Type EPIM-A and EPIM-X EPIM-A and EPIM-X AUI Port Transceiver Requirements COM Preamble Delay Times Start of PacketsDelay Times JAM General JAM Output Fault ProtectionPower Supply Requirements Output Min. Load Max. Load Max Power Physical Safety Unpacking the Sehi Installing the Sehi Stacking the Sehi Stacking the Sehi Disconnect SEH and Sehi Interconnect Cables At the OUT Port Attaching the Strain Relief Bracket Rack Mounting the Sehi Installing the Sehi in the Rack Wall Mounting the Sehi Shelf or Table-top Installation Free-Standing Installation Installation Connecting the Sehi to the Power Source Connecting to Network Ports, SEHI-22 and SEHI-24 Connecting the Sehi to the Network EPIM-2 Connecting to Network Ports, SEHI-32 and SEHI-34 EPIM-T Cross-over Switch Connecting a UTP Segment to an EPIM-T Connecting 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-A Connecting an AUI Cable to an EPIM-X On Position Toward Back Epim OFF Position Toward Front Finishing the Installation Installation CHECK-OUT Chapter Troubleshooting Using Lanview CPU PWR LNK Troubleshooting CLNUsing the Reset Button RCV Chapter Local Management Local Management Management Terminal Requirements Management Terminal Connection Console Cable Conﬁguration Setup Management Terminal Setup ParametersMenu Function Selection Display Setup General Setup Sehi Local Management Local Management Accessing Local Management Feature Selection Screen Community Name Table Screen Local Management Using the Local Management Screens Community Name Access Editing the Community Name Field IP Address Conﬁguration Screen SubNet Mask Default GatewayPort Enable Override Setting the IP Address Setting the Subnet Mask Using the Port Enable Override Setting the Default Gateway Trap Table Screen Exiting the Configuration Screen Trap IP Address Configuring the Trap TableSnmp Community Name Traps Snmp Tools Screen Exiting the Trap Table Screen Get Next OID PrependGet Set Cycles WalkRecall-OID Step Getting the Next OID Getting Individual OIDs Viewing Multiple OIDs Setting an OID Stepping Through OIDs Walking Through OIDsCycling Through OIDs Device Statistics Screen Exiting the Snmp Tools Screen Port Admin. Status Errors ReceivedCRC Errors Alignment Errors Port Seg. Status Enable PortDisable Port Update-Freq Selecting the Appropriate Module/Port Using the Enable Port Command Exiting the Device Statistics Screen Using the Disable Port Command Twisted Pair Wiring Tables Appendix a Twisted Pair Wiring Tables A-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 Plate Figure A-1. Punch Down Block A-9 French Power Supply CordGerman Spanish