ABOUT T HIS G UIDEThis guide describes the various interface cards and interface modules that areavailable for use with you H3C MSR 20/30/50 Series router.This guide is intended for qualified service personnel who are responsible forconfiguring, using, and managing the routers. It assumes a working knowledge oflocal area network (LAN) operations and familiarity with communication protocolsthat are used to interconnect LANs.n Always download the Release Notes for your product from the 3Com World WideWeb site and check for the latest updates to software and productdocumentation: http://www.3Com.comConventions Table 1 lists icon conventions that are used throughout this guide.Table 2 lists text conventions that are used throughout this guide.Table 1 Notice IconsIcon Notice Type Descriptionn Information note Information that describes important features orinstructions.c Caution Information that alerts you to potential loss of dataor potential damage to an application, system, ordevice.w Warning Information that alerts you to potential personalinjury.Table 2 Text ConventionsConvention DescriptionScreen displays This typeface represents information as it appears on thescreen.Keyboard key names If you must press two or more keys simultaneously, the keynames are linked with a plus sign (+), for example:Press Ctrl+Alt+DelThe words “enter” and “type” When you see the word “enter” in this guide, you must typesomething, and then press Return or Enter. Do not pressReturn or Enter when an instruction simply says “type.”
