ИСТИНА

The paper is devoted to telecommunication services for digital railways. We discuss a transition from GSM-R to LTE-R and 5G technologies. As a practical use case, we target urban railways development in Moscow, Russia. According to the European Commission, digital railways development should create so-called connected railways by providing reliable connectivity for safe, efficient and attractive railways, enhancing customer experience. It should provide added value for customers, increased capacity by enhanced reliability, efficiency, and performance of railways. In this connection, we discuss the critical elements of 5G deployment and the practical steps to move from the current tel-ecommunication services to 5G. As historical examples, we are considering the largest projects of the transformation of the telecommunications infrastructure. As basic examples for GSM-R transition and switch to digital railways, we discuss Moscow Central Ring and Moscow Central Diameters. The paper highlights several tasks for telecom providers in Russia. In particularly, it is the de-velopment of the GSM-R network architecture taking into account existing networks, including interaction with an intelligent network, as well as the need to upgrade existing networks.