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Railway Cables |  |
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CT2242 Outdoor Single Mode Armoured
Trackside Optical Fiber Cables
Application
The cables are designed for long distance telecom links on optical fi bres along railway tracks. The cables are
suitable for installation directly in channels or buried.
Standards
SNCF CT 2242.6.1
Construction
Fibres
Singlemode optical fibres G652 coloured (6 or 12 per tube).
Central Strength Member
Non-metallic central reinforcement (FRP).
Tube
PBT polyester tubes containing fibres.
Filling
Petroleum jelly with water-swelling yarns to provide longitudinal watertightness.
Inner Sheath
Low density polyethylene.
Armour
0.25mm thick corrugated steel tape armour.
Outer Sheath
Low density polyethylene.
Electrical Characteristics at 20℃
| Maximum Attenuation | G652 | |
| @1310nm | dB/km | 0.35 |
| @1550nm | dB/km | 0.22 |
| Maximum Chromatic Dispersion | ||
| Between 1260 and 1360nm | ps/(nm/km) | 3.5 |
| Between 1530 and 1565nm | ps/(nm/km) | 19 |
| Zero Dispersion Wavelength | nm | 1310±11 |
| Zero Dispersion Slope | ps/(nm2.km) | 0.09 |
| Numerical Aperture | 0.14 | |
| Point discontinuity | dB | 0.1 |
| PMD (individual fi ber) | ps/km | 0.2 |
| Maximum Cutoff Wavelength | nm | 1260 |
| Cladding Diameter | um | 125±1 |
| Core/Cladding Concentricity Error | um | ≤0.5 |
| Cladding Non Circularity | % | ≤1 |
| Coating Non Circularity | % | ≤6 |
| Proof Test Level | Kpsi (GN/m2) | 100 (0.7) |
| Crush Resistance | N/cm | 450 |
| Maximum Laying Tension | N | 3000 |
Mechanical and Thermal Properties
Minimum Bending Radius: 310mm.
Temperature Range: -40℃ to +70℃ (during operation);
-10℃ +70℃ (during installation)
Dimensions And Weight
| Cable Code | No. of fibres | Nominal Sheath Thickness mm |
Nominal Overall Diameter mm |
Nominal Weight kg/km |
| RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y | 1-36 | 1.5 | 14.5 | 260 |
| RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y | 48-72 | 1.5 | 16.5 | 300 |
| RO2242-ML-C-9-Tn×Fn-SR-2Y(STA)2Y | 80-144 | 1.5 | 22.0 | 510 |