 out in the field is not well served by any educational material currently available-a situation which this work aims to rectify. This book collects, arranges, and consolidates the necessary knowledge into a format that makes it easier to digest. The aim is to provide in-depth information on timing and synchronization-at the basic as well as advanced level. This book includes topics such as timing standards and protocols, clock design, operational and testing aspects, solution design, and deployment trade-offs. Although 5G mobile is the primary focus of this book, it is written to be relevant to other industries and use cases. This is because the need for a timing solution is becoming important in an increasing number of scenarios-the mobile network being only one very specific example. Many of the con- cepts and principles apply equally to these other use cases. The goal is for this book to be educational and informative. Our collective years of experience in both developing timing products and helping customers understand how to implement it is now available to the reader. Who Should Read This Book? The primary audience of this book is engineers and network architects who need to understand the field-as specified by international standards-and apply that knowledge to design and deploy a working synchronization solution. Because the book covers a broad spectrum of topics, it is also well suited for anybody who is involved in selecting equipment or designing timing solutions. This book is written to be suitable for any level of technical expertise, including the following: Transport design engineers and radio engineers looking to design and implement mobile networks Test engineers preparing to validate clock equipment or certifying a synchronization solution in a production network Networking consultants interested in understanding the time synchronization technology evolu- tion that affects their mobile service provider customers Students preparing for a career in the mobile service provider or private 5G networ