What is an optical time-domain reflectometer (OTDR)?

An optical time-domain reflectometer (OTDR) is a crucial tool used in fiber optic communication, specifically designed for testing and troubleshooting fiber optic cables. It operates by sending a series of light pulses into the fiber and measuring the amount of light that is reflected back to the device. The reflections help determine the integrity of the fiber, locate faults, splices, and connectors, and assess overall performance.

This capability makes the OTDR vital for maintenance and quality assurance in fiber optic installations, as it provides valuable insights into the state of the fiber links and enables technicians to identify issues quickly. By analyzing the reflections captured over time, the OTDR generates a detailed graphical representation of the fiber's performance, which is essential for diagnosing problems and ensuring optimal functionality.

The other options do not accurately describe the role or functionality of an OTDR. While it does play a part in installation, its primary utility lies in testing and troubleshooting, not just during installation. Additionally, it is not primarily a system for managing fiber optic connections or a control system for signal distribution. Its focus is specifically on testing and analyzing the integrity of the fiber optic medium itself.