Do outdoor fiber optic cables all have armor

Some cables have armor, usually metallic but sometimes hard plastic, under the outer jacket resist crushing loads, such as cables installed under floors in data centers or in rocky soil, as well as to prevent rodent penetration. Use armored or water-blocked designs. Need abrasion resistance and high pull strength. Best for long-distance links. Executive Summary: Both armored and unarmored fiber optic cables transmit light signals at near-speed-of-light speeds. You select between them based on route exposure, rodent risks, burial requirements, tension loads, and overall ODN architecture.