The Soft Tube Cable (STC) is a non-metallic, longitudinal water-protected outdoor fibre optic cable, designed for the construction of optical infrastructure networks (backbones, distribution and access). In the high-capacity version, they are destinated for the construction of network cores and ring structures. Their structure in sub-bundles allows simple identification and optimized management in boxes. The STC cable contains Soft Tubes, for fast and easy access to the fibres (without tooling), to avoid the risk of tube kinking, facilitate the end and mid span access and reduce the installation time and costs. Its light weight, compact and robust structure, combined with a low-friction HDPE outer sheath, makes the cable perfectly suitable for installation in ducts by pulling, floating or air-blowing.


Product characteristics
Colour outer sheath Black
Material outer sheath HDPE
Cable metal free Yes
Optical element Soft tube
Optical fibre standard ITU-T G.657.A2 200 µm
Cable type STC
Fibre type Single mode 9/125
Type of strain relief FRP
Strain relief Yes
Application Outside
Test procedures EN IEC 60794-1-2
Optical specification
Bending radius fiber (1 turn acc. to ITU rec.) 30 mm
Bending radius fibre storage (<10 turns acc ITU rec) 15 mm
Max. attenuation @ 1625 nm 0,25 dB/km
Max. attenuation @ 1550 nm 0,23 dB/km
Max. attenuation @ 1310 nm 0,36 dB/km
Category according to EN 50173 OS2
Environmental specification
Transportation and storage temperature -40/70 °C
Operational temperature range Ta1 - Tb1 -20/70 °C
Longitudinal watertight construction Super Absorbing Polymer
Installation temperature -15/50 °C
UV resistant Yes
UV-protection ISO 4892-2, 4000h
Max. attenuation increase during Ta2 - Tb2 0,15 dB
Operational temperature range Ta2 - Tb2 -40/70 °C
Max. attenuation increase during Ta1 - Tb1 0,05 dB
Color fastness Blue wool scale 8
Cable longitudinally watertight Yes
Other specification
Halogen free (acc. EN 60754-1/2) Yes
Halogen free IEC 60754-1&2 / EN 50257-2-1 / EN 50267-2-2 / EN50267-2-3
Low smoke (acc. EN 61034-2) Yes
Vertical flame propagation (for single cable) IEC 60332-1-2 / EN 50265-2-1
Logistical specifications
Unit meter
Grouped product items
Article number Description Outer diameter approx. Min. bending radius during installation Min. bending radius after installation Netto Weight (kg/m)
79025 720x SM G.657.A2 (60x12) 17,5 mm 175 mm 250 mm 0.208
79024 576x SM G.657.A2 (48x12) 16,5 mm 165 mm 150 mm 0.186
79023 432x SM G.657.A2 (36x12) 15,5 mm 155 mm 200 mm 0.161
79026 864x SM G.657.A2 (72x12) 18,0 mm 180 mm 135 mm 0.23