Direct Buried

Direct Buried CT CST Light

Central tube (CT) corrugated steel tape (CST) design for direct buried


Optical fiber


PBT loose tube filled with water-blocking gel


Water-blocking gel


Corrugated steel tape armor


Polymer jacket


Steel wires

Excellent rodent resistance, suitable for duct installation

Reduced weight and size

Cost-effective design

Up to 24 fibers

Resistance to crushing load from 0.5 kN/cm

Allowable tensile strength up to 2.7 kN

Max rated design tension 2.7 kN
Crush — 0.5 kN/cm
Fiber count up to 12 up to 16 up to 24
Cable diameter, mm 7.3 7.5 7.8
Cable weight, kg/km 70.7 72.7 75.9
Min bending radius, mm 109.5 112.5 117.0
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Operation temperature -50°С…+70°С
Installation temperature -30°С…+50°С
Transportation and storage temperature -50°С…+70°С
Minimum bending radius 15x cable diameter
Life time 25 years