1.wide pass band optical fiber.The theory of up to 30Tera hertz.

       2.no relay long. Several to more than 100 kilometers, only a few hundred metres of copper wire.

       3. Effects of 3 is not affected by the electromagnetic field and electromagnetic radiation.

       4.The 4 light weight, small size. For example: 20000 1000session 900 twisted pair, which is 3 inches in diameter,weight of 8 tons of /KM. And communication cable the ten times, 0.5 inches in diameter, weight 450P/KM.

       5. optical fiber communication is not charged, the use ofsafety can be used in flammable, explosive places.

       6. use a wide range of ambient temperature.

       7 .chemical corrosion, long service life.