Cabletron Systems 24 User Manual

Page 1-1CHAPTER 1INTRODUCTIONWelcome to the Cabletron Systems STH-22/-24/-42/-44 Stackable TokenRing Hub User’s Guide. The STH (Stackable Token Ring Hub) is a non-intelligent hub designed to provide expanded connectivity for CabletronSystems’ STHi intelligent hubs and Cabletron Systems MicroMMACintelligent hubs. This manual provides installation instructions andreference information for STH models 22, 24, 42, and 44.Note: The term STH is used throughout this manual when describingfeatures and functions that are common to the above listed STH models.1.1 Using This ManualRead through this manual completely to familiarize yourself with itscontent and to gain an understanding of the features and capabilities ofthe STH. A general working knowledge of IEEE 802.5 Token Ring datacommunications networks and their physical layer components will behelpful when installing the STH.Chapter 1, INTRODUCTION, outlines the contents of this manual,briefly describes STH features, and concludes with a list of relatedmanuals.Chapter 2, REQUIREMENTS & SPECIFICATIONS, describesinstallation requirements, network guidelines, and STH operatingspecifications.Chapter 3, INSTALLATION, contains instructions for installing the STH.Chapter 4, TROUBLESHOOTING, describes how to use the LANVIEWLEDs to troubleshoot network problems.1.2 STH OverviewThe STH is a non-intelligent hub which provides expanded connectivityfor Cabletron Systems’ STHi intelligent hubs and Cabletron SystemsMicroMMAC intelligent hubs. Each STH added to an intelligent hub‘smanaged stack increases the LAN’s connectivity by 12 or 24 Trunk