ment it is quite common to encounter the use of optical repeaters to transfer data at distances greater than those possible via copper cable. In addition to repeaters, the use of optical modems and multiplexers, as well as storage area networks based on the transfer of data over optical fiber, is also becoming com- mon. In the home environment both cable and telephone companies are using fiber-to-the-neighborhood (FTTN), fiber-to-the-curb (FTTC), and fiber-to-the-home (FTTH) systems as mechanisms to provide broadband communications to the residential market. Because of the explosion in the use of optical networking devices, it is important for communica- tions professionals to understand how optical networking occurs as well as the numerous options available. That is the focus of this book. In this book we will focus on the various components of an optical transmission system and how those components are used to support both effective and efficient transmission via light. Because it is reasonable to expect readers to have both a diverse background and more than likely Copyright 2001 The McGraw-Hill Companies, Inc. Click Here for Terms of Use. Preface different networking requirements, this book was written to provide insight into many areas of optical networking. Thus, in this book we will become acquainted with the operation of different optical networking components as well as their use in development of transmission systems for use in WANs, LANs, and other application environments. As a professional author with over 30 years of hands-on networking experience, I highly value reader feedback. Please feel free to contact me via email at gil_held@yahoo.com concerning any comments you wish to share concerning this book. Let me know if I omitted an area or topic that should be considered for the next edition of this book, or if I put too much or too little emphasis on a topic. With that said, grab a Coke, Pepsi, or your cup of tea and follow me as we explore the wonderful world of optical networking. Gilbert Held Ma