TUFF Handset Delivers Six-Figure Annual Savings for Rail Operators – Now TOSQA and RIS Approved for GSM-R Train Radio Yurtdışı Haberleri by railsistem - Haziran 25, 20250 Driven by its success as a PIS handset, DAC’s TUFF handset is now officially TOSQA and RIS 0794 approved for use with onboard GSM-R radios. In the train cab, driver communication is critical, and this relies on robust, durable equipment. When a system goes down, delays and downtime occur and it’s