Our product range includes an original version of FTMSU that is classified as Dca -s2, d2, a2 and an upgraded version that is classified as Cca -s1b, d0, a1.


  • Optical fibres: Single-mode fibres according to the ITU-T G.657.A1. Fibres meet also the requirements of ITU-T G.652.D.
  • Secondary coating: Tight buffer, outer diameter 900 μm.
  • Strength members: Glass yarns with water-blocking coating under the sheath.
  • Outer sheath: Flame retardant, halogen free and UV resistant plastic (LSZH). Colour of the sheath is light grey RAL 7035. Nominal sheath thickness of the original version is 1,0 mm. Cable is flame retardant according to the IEC 60332-1-2 and IEC 60332-3.
  • Sheath marking: Marking printed on the sheath at one meter interval: Nestor Cables - cable type - year of manufacture - length marking. 

All of our fibre optic and copper cables are halogen-free.

STK* Nestor code Size Diameter Weight Length Drum
- -


5,3 mm

28 kg/km

2000 m P6




5,3 mm

28 kg/km

2000 m P6
0217456 L10926 4xG.657.A1 5,3 mm 28 kg/km 500 m P4




7,2 mm

51 kg/km

2000 m P8


*Clicking on these numbers will take you to the product page on the Finnish STK service.


Max. tension during installation

500 N

Crush strength with 100 mm plate

2000 N

Temperature range during operation

-45 - +60 °C

Temperature range during installation, storage, transport

-15 - +60 °C

Reaction to fire (CPR)

Dca -s2,d2,a2

Minimum bending radius

Installed 10 x diameter, during installation 20 x diameter