1. The passband of optical fiber is very wide, theoretically up to 3 billion megahertz.
2. No relay section is tens to more than 100 kilometers long, while copper wire is only a few hundred meters.
3. Not affected by electromagnetic field and electromagnetic radiation.
4. Light weight and small size. For example: through the 21,000 thousand telephone circuit of 900 pairs of twisted pair, its diameter is 3 inches, weight 8 tons / KM. and communication volume for its ten times the diameter of the fiber optic cable is 0.5 inches, weight 450P / KM.
5. Fiber optic communication is not electrically charged, safe for use in flammable and volatile locations.
6. Wide range of ambient temperature.
7. Chemical corrosion, long service life.
