This is a comprehensive book that addresses both thermal and mechanical reliabilities as well as energy efficiency in the design of all types of telecommunications equipment, including indoor and outdoor systems. This book places a great deal of emphasis on providing practical solutions to thermal issues facing today's telecommunications industry. Materials presented in the book are based on actual cases in design of all types of telecommunications equipment. This book is developed to serve many types of readers. For graduate students, this book will guide them with practical approaches to solve real world problems that are of vast complexity. For professional engineers, this book will provide them with valuable and resourceful references.