Structurally, fiber optic cables are more complex than what we just see, a fiber optic cable involves 8 kinds of materials at least . Furthermore, different fiber optic cables include different materials and designs which make them a little bit costly. So there are many inferior cables in the market supplied at low price, which gives people difficulties to get high-quality products. But it is still able to identify by the appearance and performance, as bad materials would cause evidence on products. 

Below are listing some useful experiences from the structure of fiber optic cable to give you ideas for identification.

Outer skin 

For outdoor and indoor fiber optic cables, we can identify from appearance’s features by below: