Faster Speeds: Fiber optics can deliver gigabit speeds, enabling faster internet, high-definition streaming, and lag-free video calls. Greater bandwidth Copper cables were originally designed for voice transmission and have a limited bandwidth. Within. But what is it that gives Fiber Optics the advantage over traditional copper cabling? There are many advantages but there are some disadvantages also, so we are going to look at the fiber optic cable advantages and disadvantages. Enhanced Reliability: These cables resist electromagnetic interference and environmental stress, making them dependable in both indoor and outdoor. Furthermore, fiber optic cables are immune to extreme changes in temperature and moisture levels, both of which can hinder transmission in copper cables.