Fiber Optic Tools (FOTs) are equipment and tools used to install, maintain and repair fiber optic communication systems. Measures distance to faults, reflectance, and total fiber loss. Crucial for certifying new links or troubleshooting existing ones. Good OTDRs come with touchscreen interfaces, multiple wavelengths, and. Fiber optic tools play a critical role in the deployment, maintenance, and testing of modern communication networks.