※Price not negotiable※ ◎ Transmission and Switching Equipment and Equipment Management From Reiwa 3 (2021) First Session to Heisei 24 (2012) First Session R3-1 to H24-1 (18 sessions) ◎ Regulations From Reiwa 2 (2020) Second Session to Heisei 26 (2014) First Session R2-2 to H26-1 (13 sessions) This is a collection of answers for each exam session, compiled on A4 paper. For calculation problems (questions 4 Ki and Ku, etc.), explanations are provided on separate sheets. Reference books in bookstores often omit the intermediate calculations, making it difficult for those who are not good at math to understand them even if they buy the book. However, this collection is easy to understand because it fills an A4 page with detailed intermediate calculations. For this qualification, reference books in bookstores can cost over 6,000 yen, and even if you buy one, you have to flip through many pages to find the answers you're looking for because of the large number of pages. It's inefficient to solve a large number of past questions. This is an answer book created to efficiently solve a large number of questions in a short amount of time. The reference books and past question collections currently available in bookstores focus only on the most recent exam questions, so the frequency of questions is low, the price is high, and they are thick, making them difficult to carry around, and the number of questions is also small, so the study efficiency is poor for the price. This answer book not only includes answer numbers but also the correct answers, so you can study with just this one sheet and past questions. As I am an amateur, I have collected and compiled a lot of answers from various books and the internet, so there may be some errors. If you are looking for a perfect product or are concerned about this, please refrain from purchasing. For those who are exempt from the telecommunications system exam, or those who have passed the Class 1 Radio Engineer or Telecommunications Engineer exams and are considering the next qualification, how about this? Or, for those who have obtained a Telecommunications Technician (DD1st Class, General Class, etc.) and are aiming for the Class 1 Radio Technical Engineer qualification, how about this? I think it's overwhelmingly easier and more recommended to obtain a Telecommunications Chief Engineer first and apply for subject exemptions than to study all subjects of the Class 1 Radio Engineer exam all at once. ※Caution※ ※The previous exam questions are not answered because they are highly unlikely to be asked in the next exam. ※Only answer explanations are provided. The questions themselves are available on the internet, so please search for them. ※For calculation problems only, two sessions' worth of questions are printed on one A4 sheet. ※Since I have not taken the Telecommunications System and Line exams, answer explanations are not included. ※The transfer, resale, reproduction, and secondary use of this product are prohibited, whether for profit or not.