Specs: 2,000 ft outdoor run with direct burial, single-mode fiber, mid-grade jacket. Labor: 2 technicians, 18 hours. Total range: $2,800–$7,000; $1. Utility Direct burial fiber optic cables are resistant to UV radiation, abrasion, and fungus to endure the tough conditions of underground installations. These cables are engineered to resist moisture, temperature fluctuations, and physical damage, ensuring reliable performance in even the most. Direct buried fiber optic cable is a kind of optical cable which is armored with steel tape or steel wire outside. The main cost drivers include cable type (single-mode vs multimode), whether the run is indoors or outdoors, trenching or direct burial requirements, and labor time. Higher strand counts increase costs proportionally—a 12-strand fiber cable runs approximately $0.