Caltrain is an American railway company in California and is one of the most important railways around the Bay of San Francisco. In 2016, Stadler Rail had been awarded a contract to deliver 16 double-decker trains (type KISS) and had selected ErvoCom/Railcom as the supplier for the train radio system. The scope of delivery includes 32 train radio system TRS2090 including a customer-specific UIC Option Board for connecting to the passenger intercom units. Another customer specific feature was the integration of the IM-interface to connect on-board data bus with the TRS2090. Since the customer has already exercised the option for further trains, there will be additional deliveries in 2021.