"The subscriber terminals (AT) are used in transportation control and management systems, commercially produced high-end devices. AT is used to receive and process navigation satellite signals, receive information from sensors on the object's status, provide communication with the telematics server, and transmit control signals to actuators. The modules can be aligned with mobile objects: vehicles, dump trucks, excavators, and other mining and mining and transportation equipment. AT "M2M" collects sensor readings, including the current coordinates of the object, processes them using internal software, and transmits them via GPRS to a server. Now, as navigation and communication equipment in M2M, commercially manufactured GPS / GSM / GPRS controllers are used."