The book «Power supply of telecommunication systems: methodical instructions and control tasks for students of specialties «Radio engineering», «Network» by B. In. Klimovicha is an indispensable educational material for students and professionals seeking to better understand the basics of power supply in the field of telecommunications. With the rapid development of technology and increasing demand for reliable and efficient communication systems, this publication becomes a real guide to the complex but fascinating world of electrical and radio engineering. The book covers a wide range of topics related to power supply, including the principles of operation of power sources, methods of calculation and design of electrical circuits, as well as issues related to the reliability and safety of systems. In. In. Klimovich, having a rich experience in this field, shares his knowledge, which makes the material accessible and understandable even for beginners. At the same time, the author does not forget about the importance of practical application of theoretical knowledge, offering students control tasks that will help to consolidate the studied material and prepare for real working conditions in the field of telecommunications. This book will be especially useful for students of technical universities studying in the specialties "Radio Engineering" and "Networks" .. It may also be of interest to young professionals working in the design and operation of telecommunications systems, as well as teachers looking for quality teaching materials for their courses. In. In. Klimovich has created a work that combines theory and practice, making it ideal for anyone who wants to gain in-depth knowledge in the field of power supply. The topics raised in the book cover not only technical aspects, but also issues related to modern trends in telecommunications. The reader will be able to learn about new technologies, such as renewable energy, which are becoming increasingly relevant in the face of global climate change and the need to optimize energy consumption. Klimovic emphasizes the importance of sustainable solutions, which makes the book relevant not only for students, but also for everyone who cares about the future of our planet. The author's style is distinguished by clarity and logical presentation, which makes it easy to perceive even the most complex concepts. Klimovich uses many examples and illustrations, which makes the learning process more exciting and visual. His previous work is also noteworthy, and many readers note that the style and approach to learning in his books always remain at a high level. If you are looking for a high-quality training manual on power supply in telecommunications, which will help you not only to master the theory, but also to apply it in practice, "Power supply of telecommunications systems" In. Klimovich will be a great choice . This book is not just a set of methodological guidelines, but a whole world of knowledge that awaits its reader. She inspires the study, research and application of the acquired knowledge in real life, which makes her an indispensable assistant on the way to professional success.