Fiber optics are essential in telecommunications for high-speed internet and data transmission. They are installed using thin strands of glass or plastic fiber that transmit data as light pulses. Technicians assess the site to determine the optimal routing, which is then carefully laid out using trenching or aerial installations. Advanced fusion splicing techniques are used to minimize signal loss. After installation, the system undergoes rigorous testing to ensure performance standards are met, including light transmission quality and signal disruptions. Regular maintenance and upgrades are scheduled to maintain the network's integrity and longevity, providing reliable and fast telecommunications services.