Cabletron Systems STH-22, STHI-44, 42, 24 manual Introduction, Using This Manual, STH Overview

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CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems STH-22/-24/-42/-44 Stackable Token Ring Hub User’s Guide. The STH (Stackable Token Ring Hub) is a non- intelligent hub designed to provide expanded connectivity for Cabletron Systems’ STHi intelligent hubs and Cabletron Systems MicroMMAC intelligent hubs. This manual provides installation instructions and reference information for STH models 22, 24, 42, and 44.

Note: The term STH is used throughout this manual when describing features and functions that are common to the above listed STH models.

1.1Using This Manual

Read through this manual completely to familiarize yourself with its content and to gain an understanding of the features and capabilities of the STH. A general working knowledge of IEEE 802.5 Token Ring data communications networks and their physical layer components will be helpful when installing the STH.

Chapter 1, INTRODUCTION, outlines the contents of this manual, briefly describes STH features, and concludes with a list of related manuals.

Chapter 2, REQUIREMENTS & SPECIFICATIONS, describes installation requirements, network guidelines, and STH operating specifications.

Chapter 3, INSTALLATION, contains instructions for installing the STH.

Chapter 4, TROUBLESHOOTING, describes how to use the LANVIEW LEDs to troubleshoot network problems.

1.2STH Overview

The STH is a non-intelligent hub which provides expanded connectivity for Cabletron Systems’ STHi intelligent hubs and Cabletron Systems MicroMMAC intelligent hubs. Each STH added to an intelligent hub‘s managed stack increases the LAN’s connectivity by 12 or 24 Trunk

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Contents Stackable Token Ring HUB USER’S Guide Page DOC Notice FCC NoticeCabletron Software Program License Cabletron SYSTEMS, INC Program License AgreementExclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Contents Troubleshooting InstallationUsing This Manual IntroductionSTH Overview HubSTACK STH OverviewRing Speed Fault Protection Lobe Port and Multiple Ring Out Port ConfigurationsLanview LEDs Lanview LEDsDaughter Board Upgrade Kit Automatic Beacon Recovery ProcessAutomatic Beacon Recovery Process Active CircuitryRelated Manuals Related ManualsImproved Protection from Beaconing No Connection RedundancyDAISY-CHAIN MAU Configuration Getting Help Getting HelpGeneral Considerations Requirements & SpecificationsMaximum Number of Stations on a Ring CrosstalkTemperature Installation RecommendationsGeneral Considerations UTP Cabling Specifications Cable SpecificationsCable Specifications UTP Cable CategoriesNext UTP Cable CategoriesSTP Cabling Specifications UTP Lobe LengthsUTP Lobe Lengths STP Cable Categories STP Cable CategoriesSTP Lobe Lengths TCU Specifications TCU SpecificationsOperating Specifications Operating SpecificationsRing Speed Power Supply Requirements Ring SequenceRing Sequence Environmental Requirements SafetyEnvironmental Requirements PhysicalInstalling the STH InstallationUnpacking the STH Rack Mount or Wall Mount HardwareAdding the STH to a Stack Adding the STH to a StackAttaching the Strain Relief Bracket Attaching the Strain Relief BracketRack-Mounting the STH Wall-Mounting the STH Wall-Mounting the STHWall-Mounting the STH Free-Standing Installation Free-Standing InstallationConnecting the STH to the Power Source Connecting the STH to the Power SourceAttaching Network Cabling to TCU Ports Finishing the Installation Finishing the InstallationTroubleshooting Lanview LED SignalsTrouble Resolution Loss Of Power Trouble ResolutionFailure to Link on Enabled Port Ring Speed Fault