Microwave Towers The BorderTransportationSystem will be connected to the Internet, and to the Border Patrol system.  The U.S.A. Border Patrol has installed many high-technology sensors, radars, and microwave towers along the Arizona / Mexico border, and thus much of the system is already designed and in use. The microwave system can be used as a redundant system for the fiber optic communications or LED Li-Fi systems that are inside the system's 'T' towers, or visa versa. Index of ... Border Patrol Doubles Down on High-Tech Security Li-Fi Communications technology