ABOUT THIS GUIDEThis guide provides all the information you need to install and use thefollowing switches in their default state:■ Switch 4500 26-Port (3CR17561-91)■ Switch 4500 50-Port (3CR17562-91)■ Switch 4500 PWR 26-Port (3CR17571-91)■ Switch 4500 PWR 50-Port (3CR17572-91)All procedures described in this guide apply to all models except wherestated.The guide is intended for use by network administrators who areresponsible for installing and setting up network equipment;consequently, it assumes a basic working knowledge of LANs (Local AreaNetworks).Before You Start The Release Notes provide important information about the currentsoftware release, including new features, modifications, and knownproblems. You should read the Release Notes before installing the Switchin your network.If the information in the Release Notes differ from the information in thisguide, follow the instructions in the Release Notes.The latest versions of user guides and release notes are available in AdobeAcrobat Reader Portable Document Format (PDF) on the 3ComWorld Wide Web site:http://www.3com.com/