One of my subjects at university The subject which I will briefly describe today is called "Reliability and operation of radio communications and radio access equipment". I was only on two lectures (each for 5 hours), and the professor told us about how to calculate spare parts so that they would be enough for the equipment to work without interrupts; about equipment in general, for example, that they are divided into many groups, for example, recoverable and non-recoverable. Recoverable ones can be restored after a failure or accident. More equipment is divided into groups, for example, on duty and main. Duty equipment begins its work only when: the main one stopped working, or the main equipment needs help because of the large load. At the weekend, I did the first lab, there were 7 tasks in which I need: ​​to calculate equipment availability factors, time between failures, reliability indicators, the probability of a failure, and more. This text was about one of my subjects that I learn at university.