Case Study

Danish State Rail Operator turns to GarrettCom for In-Carriage Network Solution


DSB carries some 168 million passengers every year and operates approx. 80% of passenger train services in Denmark. DSB provides rail services within Denmark and across international borders.

High-speed networks on trains demand ruggedized solutions able to withstand temperature swings, extreme weather and vibration. The EN50155 standard for electronic railroad applications introduces stringent demands for reliability, covering humidity, extended temperature range (–40 to +85°C), shock, vibration and power fluctuations. In addition, EN50155 prohibits the use of fans in train electronics: only passive cooling technologies are permitted.


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Project requirements

DSB decided that it was important for them to provide network connections for in-carriage IP-enabled security and surveillance equipment, infotainment systems, and passenger counting technology. However, they wanted to ensure everything installed complied with EN50155.
EN50155 even prohibits the use of fans in train electronics: only passive cooling technologies are permitted. Also as a precautionary measure EN50155 suggests the use of protective coatings for PCBs in electronic products to counteract corrosive atmospheres that are often present in railroad applications. The products to be installed all needed to be powered from an auxiliary 110V DC system which is present in each coach.



DSB now have an IP network on board their trains which has enabled a whole host of services to run across the one single communications platform. Train information such as passenger counting via cameras, and the trains current position is sent to a central office for monitoring and statistics. Video recorders are also connected to the network, which help DSB to avoid vandalism and graffiti damage at train equipment. A further benefit of the IP network is providing a free internet connection to passengers.