Jernbaneverket wants to carry out an risk and vulnerability analysis of its electronic communication system. The electronic communication system produces services used for railway specific purposes. The system consist of transport network/transmission services, GSM-R based access network, various signalling systems (older locally based systems, class B Thales system, class A ERTMS system), condition monitoring/predictive maintenance system, traffic control systems and system specific IT including applications. The analysis shall cover both the system architecture perspective and the operational perspective of the system.