The choice of optical cable in addition to the fiber number and fiber type, but also the outer sheath of cable is selected according to the cable service environment.

     1. outdoor optical cable directly buried, should usearmored cable. Overhead, the cable can be black plastic sheath reinforced with two or more.

      2. Cable buildings use should pay attention tocharacteristics of the flame retardant, toxicity and smokein the selection. General in the type of pipe or forcedventilation can be used flame retardant but smoke(Plenum), type selection of flame retardant, non-toxic and smokeless should be exposed in the environment (Riser).

      3.building vertical cabling, can choose layer stranded cable (Distribution Cables); horizontal wiring, can chooseto branch cable (Breakout Cables).

      4.The  transmission distance is within 2km, can choosemultimode optical fiber cable, more than 2km availablerelay or using a single mode optical fibre cable.