The purpose of the book is stated as "to provide insight into the many advances in long-distance telecommunications", to mark changes in the used technologies "from analog to digital, from microwave radio to fiber-optic cable". Largely experienced in the domain (having contributed to the developments in network elements and transmission systems), the authors opt for a practical approach at the expense of a mathematical approach. They present the principles underlying the operation of equipment and systems and especially the field orientation rather than "the fine details of topics that are likely to change".
by William S. Lee and Derrick C. Brown