DYFTY is a stranded loose tube hybrid/composite cable with a single black polyethylene jacket and no armour. Its all-dielectric construction suits lashed aerial, duct and underground conduit installation.
Construction
- 2 to 288 fibres, 250 µm coloured
- Gel-filled loose tubes
- Central strength member: FRP (fibreglass-reinforced plastic)
- Black UV- and water-resistant polyethylene (PE) outer jacket
Why use it
- All-dielectric construction, up to 288 fibres
- Gel-filled loose tubes protect the fibres
- Fibreglass reinforcement gives high tensile strength
- UV- and water-resistant
Typical uses
Inter-building voice and data backbones; duct, underground conduit and direct burial.
Optical characteristics
| Fibre Type | G.652 | G.655 | 50/125µm | 62.5/125µm | |
|---|---|---|---|---|---|
| Attenuation (+20X) | 850 nm | <3.0 dB/km | <3.3 dB/km | ||
| 1300 nm | <1.0 dB/km | <1.0 dB/km | |||
| 1310 nm | <0.36 dB/km | <0.40 dB/km | |||
| 1550 nm | <0.22 dB/km | <0.23 dB/km | |||
| Bandwidth | 850 nm | >500 MHz-km | >200 Mhz-km | ||
| 1300 nm | >500 MHz-km | >500 Mhz-km | |||
| Numerical Aperture | 0.200±0.015 NA | 0.275±0.015 NA | |||
| Cable Cut-off Wavelength λcc | <1260 nm | <1450 nm | |||
Mechanical specifications
| Fibre Count | Nominal Diameter (mm) | Nominal Weight (kg/km) | Allowable Tensile Load (N) | Allowable Crush Resistance (N/100mm) | ||
|---|---|---|---|---|---|---|
| Short Term | Long Term | Short Term | Long Term | |||
| 2~24 | 10.6 | 85 | 1500 | 500 | 1000 | 300 |
Packing
Plywood or fumigated wooden drum.