Description
Enbeam OS2 G.657.A1 aerial fibre cable is an ultra-lightweight loose tube singlemode fibre optic cable for overhead fibre access networks. It is typically used on FTTP/FTTx distribution routes, pole-to-pole spans, external telecoms links and access network builds where a compact, moisture-protected cable is required.
The cable is built with gel-filled micromodules, water-blocking yarn and water-swellable tape beneath a black HDPE outer sheath with yellow stripe marking. Embedded brass-coated steel wire strength members provide mechanical support for aerial installation.
Optical performance is suitable for standard OS2 singlemode network applications, with attenuation of ≤0.35 dB/km at 1310 nm, ≤0.21 dB/km at 1550 nm and ≤0.23 dB/km at 1625 nm.
The G.657.A1 fibre supports improved bend performance while remaining compatible with OS2 singlemode infrastructure. The HDPE sheath and water-blocked construction are intended for external aerial use; installers should confirm CPR/fire requirements before routing through internal building spaces.
Specification
| Number of cores | 12, 24, 48, 96 |
| Type of tube | Loose |
| Fibre type | Singlemode 9/125 |
| Category | OS2 |
| Outer sheath material | HDPE |
| Outer sheath colour | Black |
| Reaction-to-fire class according to EN 13501-6 | Fca |
| Outer diameter approx. | 7 mm |
| Attenuation | @1310nm ≤0.35 dB/km @1550nm ≤0.21 dB/km @1625nm ≤0.23 dB/km |
| Chromatic dispersion coefficient | 1285nm – 1330nm ≤3.5ps/km·nm @1550nm ≤18.0ps/km·nm 1565nm – 1625nm ≤22.0ps/km·nm |
| Zero Dispersion Wavelength, λ0 | 1302-1324nm |
| Zero Dispersion Slope | ≤0.092 ps/(km·nm2) |
| Cut-off Wavelength, λcc | 1100-1320nm |
| Polarization mode dispersion | Individual fibre ≤0.1ps/√Km Design link value ≤0.04ps/√Km |
| Macro bending loss | 100 turns, 50mm radius ≤0.05dB@1310/1550nm 100 turns, 60mm radius ≤0.05dB@1625nm |
| Cladding diameter | 125.0±0.7μm |
| Cladding non-circularity | ≤1.0% |
| Primary coating diameter | 242±5μm |
| Primary coating material | UV Cured Acrylite |
| Core - cladding concentricity error | ≤0.5μm |
| Coating - cladding concentricity error | ≤12μm |
| Fibre curl radius | ≥4m |
| Mode field diameter | @1310nm 9.2±0.4μm @1550 nm 10.4±0.5μm |
| Proof stress level | 1.0% (100kpsi) |
| Weight (kg/km) | 4-48 core 40.0 (nominal) |
| Number of fillers | 4-12 core 2 24-core 1 36-48 core 0 |
| Embedding strength member | Dimension 3 x 0.32 mm Type Brass Coated Steel Wire |
| Moisture barrier | Type Water Blocking Yarn & Water Swellable Tape |
| Outer sheath | Material HDPE Thickness 1.6 mm (nominal) Strip marking width 1.25 mm (nominal) Strip marking type HDPE Yellow |
| Break load | 1900 N |
| Tensile strength | 1250 N |
| Crush resistance | 2000 N |
| Minimum bending radius | During installation 20D After installation 10D |
| Voltage test | Along power line, min vertical distance of 1.8 m 11 Kv |
| Resistance to wind/ice | 97 kph wind - No ice 80 kph wind - 5 mm ice 0 kph wind - 10 mm ice |
| Temperature | Installation -10°C to +60°C Operation -30°C to +70°C Storage -40°C to +70°C |
Downloads
| Datasheet | Download |
| Declaration of Performance | Download |
| Certificate of Conformity | Download |
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