Structure: Single fiber, double fiber, four fiber, six fiber and muti-fiber ctc. Applications: Apply to transnaision equipment telephone data processing equipment and communication, and it is optical transmission wire in transmission network. Cable cross-section Pdr chromatogram Outer sheath: Orang -- muti mode optical fiber Yellow -- mode optical fiber Lnner sheath: Orang -- muti mode optical fiber Yellow - - single mode optical fiber Muti-cable: Outer coating--orange Cable specifications: Attenuation coefficient and bandwidth level Attenuation coefficient