UNE-EN 50159:2011/A1:2020 Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems
2020UNE-EN 50159:2011/A1:2020 Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems
2011UNE-EN 50159:2011 Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems