Description
Enbeam OS2 singlemode G.657.A1 multi loose tube fibre cable is designed for external fibre optic installations in underground duct systems. It is suitable for access networks, FTTP/FTTx distribution, campus links and other outdoor telecoms routes where a water-blocked, duct-grade fibre cable is required.
The cable uses multiple gel-filled loose tubes arranged around a central strength member. Water-blocking yarn and water-blocking tape provide moisture protection, with a black HDPE outer sheath for external duct environments.
The G.657.A1 bend-insensitive fibre is compatible with OS2 9/125 singlemode infrastructure and standard 1310 nm / 1550 nm transmission windows. The HDPE sheath and water-blocked construction make it suitable for underground external duct routes; installers should check project CPR and internal routing requirements before taking the cable inside buildings.
Specification
| Weight (kg/km) | 12-24 core 55.0 (nominal) 48-72 core 55.0 (nominal) 96-core 80.0 (nominal) 144-core 130.0 (nominal) 288-core 170.0 (nominal) |
| Number of loose tubes/fillers | 12-core: 1/5 24-core: 2/4 48-core: 4/2 72-core: 6/0 96-core: 8/0 144-core: 12/0 288-core: 24/0 |
| Tensile strength | 2000 N |
| Crush resistance | 2000 N |
| Minimum bending radius | During installation 20D After installation 10D |
| Temperature | Operating -10°C to +70°C |
| Attenuation | @1310nm ≤0.35 dB/km @1550nm ≤0.21 dB/km |
| Chromatic dispersion coefficient | 1285nm - 1330nm ≤3.5ps/km·nm @1550nm ≤18ps/km·nm |
| Zero dispersion wavelength, λ0 | 1300-1324 nm |
| Zero dispersion slope | ≤0.092 ps/(km·nm2) |
| Cut-off wavelength, λcc | ≤1260 nm |
| Polarisation mode dispersion | Individual fibre ≤0.2ps/√Km Design link value (M=20, Q=0.01%) ≤0.1ps/√Km |
| Cladding diameter | 125.0±1.0 μm |
| Cladding non-circularity | ≤2.0% |
| Primary coating diameter | 245±10 μm |
| Core concentricity error | ≤0.8 μm |
| Coating - cladding concentricity error |
≤0.8 μm |
| Fibre curl radius | ≥4m |
| Mode field diameter | @1310nm 9.2±0.4 μm |
| Point discontinuity | ≤0.5 dB |
| Proof stress Level | ≥100kpsi (0.69 GPa) |
| Coating strip force | Peak 1.3-8.9 N |
Downloads
| Datasheet | Download |
| Declaration of Performance | Download |
| Certificate of Conformity | Download |
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