A fibre loop, also known as a fiber optic loop, is a network configuration that utilizes fiber optic cables to create a closed loop system for data transmission. Use the Cable options tables to determine the high-speed link (HSL) cables available for your servers, expansion units, and the maximum number of expansion units on an HSL loop. In this blog post, we will explore the significance of fiber loopback and its role in ensuring a reliable and efficient optical network. Its main use is for studying long-haul transmission in optical fiber communications systems.