Fiber optic serial data modems, also known as fiber optic converters, are utilized for secure and high-bandwidth data signal transfer in industrial and commercial environments. The FOM II series modems support various serial protocols and are designed for low signal attenuation over long distances, making them suitable for diverse applications, including traffic control and underwater communication. These modems convert electrical signals to optical signals using fiber optic cables, ensuring seamless connectivity and reliable performance in high EMI conditions.