... the function of voice and data transfer on both GSM-R and 450MHz mode.CIR unit is made up ... contains the Control unit,GPS unit,Record unit,GSM-R voice unit,GSM-R data unit,450MHz function unit,Power ... ,break-in and forced-release etc.(2)Control the GSM-R data unit by wireless data transfer to get ... the train larger than 300W.4 work condition(1)Operation temperature: -25°C~+55°C(2)Relative Humitity: 95%( ...