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