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Production » Optical microcables for urban networks » Cables for installation in cable ducts, tubes, tunnels » Microcable OKB-T

Microcable OKB-T

Fiber-optic cable OKB-T for direct burial installation, cable ducts, tubes, tunnels.


Fiber-optic cable OKB-T is designed for direct burial installation, cable ducts, tubes, tunnels in case of high requirements of crush strength.

  1. Optical fiber
  2. PBT loose tube filled with hydrophobic gel
  3. Zink-coated steel wire armor
  4. Protective jacket
  5. * longitudinal watertightness of the cable is provided by a hydrophobic gel


Cable core is a tube. Optical fibers are placed inside the tube. Interstice inside cable core is filled with hydrophobic filler. An armour of galvanized steel wires is formed around cable core. Interstice between cable core and armour is filled with hydrophobic filler. An additional jacket of high density polyethylene is extruded over the armour. In case of exclusive standards of fire safety cable jacket is made of halogen free flame retardant (HFFR) compound. In case the number of fibers exceeds 12 ring marking is used and/or bundling with identifications yarns.


Number of fibers2-82-2426-3638-48
Nominal overall diameter, mm 6,8 8,4 9,4 10,0
Total mass of cable with polyethylene jacket, kg/km 83,0 129,0 160,0 180,0
Tensile strength 2,7 kN 4,2 kN 5,1 kN 5,7 kN
Temperature range of operation, °С
-40… +60
Temperature range of installation, °С
not less than -20
Minimal bending radius, mm
not less than 10 diameters
Crush strength
from 3 kN/100 mm
Outer sheath type
HFFR compound

Documentation is on request

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