Outdoor fiber optic cable is optical cable engineered for unprotected external environments, distinguishing it from indoor cable through enhanced protection. These are the outdoor fiber optic cables you see strung along telephone poles (aerial), installed inside an underground duct, or even. Outdoor fiber optic cables are critical for building stable, high-speed networks in real-world environments. It affects performance, maintenance, cost, and reliability. Compared with indoor fiber optic cables, outdoor.