ROQSTAR M12 EN 50155 Ethernet Switches are certified for use in rail vehicles. All devices of this series are managed switches, with which intelligent IP networks in trams/streetcars can be realized. Gigabit ports are available, enabling a transmission rate of 1000 MBit/s. Thanks to integrated bypass relays, fail-safe line topologies are possible. All printed circuit boards are protected by a special lacquer.