What is GSM-R?

GSM-R stands for Global System for Mobile Communications-Railway, a digital communication system for railways:

  • Purpose

GSM-R is a secure, reliable, and mobile system that provides voice and data services for railway operations. It’s used by drivers and signallers to communicate with each other, and is a sub-system of the European Rail Traffic Management System (ERTMS).

  • Benefits

GSM-R improves safety, performance, and passenger experience. It also helps to create a more sustainable and digitally-enabled railway network.

  • Features

GSM-R offers a variety of features, including:

  • Functional Addressing: An alias system for calling someone registered on the GSM-R network

  • Location Dependent Addressing: A routing system for calling the most appropriate controller based on the train’s current position

  • Shunting Mode: A mode for when users are working on the tracks

  • Performance

GSM-R is designed to perform at speeds up to 500 km/h (310 mph) without any communication loss. However, its maximum transmission rate is only 9.6 kbit/s, which is too low for real-time applications or emergency communication.

National Rail warns of widespread disruption after communications system fault

Trains having to start their journeys later and some may be subject to cancellations or alterations