A machine for fiber laying underground is a specialized engineering device built exclusively to install fiber optic cables, protective conduits, and related communication pipelines beneath the ground surface, with a core focus on cutting manual labor, reducing surface excavation . A machine for fiber laying underground is a specialized engineering device built exclusively to install fiber optic cables, protective conduits, and related communication pipelines beneath the ground surface, with a core focus on cutting manual labor, reducing surface excavation . Trenchless cable laying is a real challenge. Our cable plough systems are environmentally friendly, efficient and ideal for laying underground cables. Our machines can lay up to 10,000 metres per day. Using our underground equipment arsenal including excavation, directional drilling, cable plowing, and trenching DCG continues to provide the methods coupled with solutions to all. Conventional trenching is suitable for open areas, while narrow trenching or horizontal directional drilling (HDD) is often preferred in urban or high-traffic environments to minimize disruption during underground fiber optic cable installation. Using Conduits to Protect Underground Fiber Cables In. Installing fiber underground is one of the most durable ways to protect a network's backbone — when it's done right. 2 meters (3-4 feet) deep to reduce the likelihood of accidentally being dug up.