The Norwegian rail system has adopted a mobile communications network to help improve safety and efficiency.
The system from Nokia Siemens Networks is designed to ensure better communications between traffic control centres and railway personnel.
The GSM-R network has been deployed by the Norwegian National Rail Administration.
The digital GSM-R mobile network replaces five different analogue networks for the communication between train sets and control centres.
The network will improve traffic security for Norwegian trains by ensuring seamless communication for employees along any tracks, totally independent of the location of the train and also when inside tunnels.
Norway is amongst the first few countries in Europe where a network allows for communications to function everywhere, said Nokia Siemens.
"The transition from analogue railway radio Scanet to GSM-R was delivered successfully and on time, and we are very satisfied with the network," said Harald Nikolaisen from the Norwegian National Rail Administration (Jernbaneverket).
Nokia Siemens said the project in Norway posed a number of geographical challenges, and covered 3,800 kilometres of railway track and 650 tunnels.
Nokia Siemens Networks installed over 500 base stations and provided radios for 150 locomotives. The network includes seven traffic control centres and 70 local control centres.