SM 24 AERIAL OR DUCT APPLICATION OPTICAL FIBER CABLE
Cable Cross-section
Cable Identification
Fiber color code
Loose tube (LT) & filler rod (FR) color code
* “LT” means “Loose Tube”;
** “FR” means “Filler Rod”.
Cable Assembly & Dimensions
| Fiber count | Max. fiber count per tube | Loose tube diameter | Steel wire diameter | Total unit count (LT + FR) | sheath thickness (nominal*) | Overall diameter (nominal**) | Weight (approx.) |
| mm | mm | mm | mm | kg/km |
| 24 | 6 | 1.8 | 1.4 | 4LT+1FR | 1.7 | 9.7 | 80 |
* The nominal sheath thickness may have a tolerance with ±0.1mm.
* * The nominal overall diameter may have a tolerance with ±0.2mm.
Performance of Cabled Optical Fiber
The performance of cabled optical fiber (ITU-T Rec. G.652D)
| Item | Specification |
| Fiber type | Single mode |
| Fiber material | Doped silica |
| Attenuation coefficient @ 1310 nm @ 1550 nm | £ 0.36 dB/km £ 0.22 dB/km |
| Cable cut-off wavelength | £ 1260 nm |
| Zero-dispersion wavelength | 1300 ~ 1324 nm |
| Zero-dispersion slope | £ 0.092 ps/(nm2.km) |
| Chromatic dispersion @ 1288 ~ 1339 nm @ 1271 ~ 1360 nm @ 1550 nm @ 1625 nm | £3.5 ps/(nm. km) £5.3 ps/(nm. km) £18 ps/(nm. km) £22 ps/(nm. km) |
| PMD | £0.2 ps/km1/2 |
| Mode field diameter @ 1310 nm | 9.2±0.4 um |
| Core / Clad concentricity error | £ 0.6 um |
| Cladding diameter | 125.0 ± 0.7 um |
| Cladding non-circularity | £0.6% |
| Primary coating diameter | 245 ± 5 um |
Performance of Optical Fiber Cable
Cable bending radius: 10 x cable diameter (static)
20 x cable diameter (dynamic)
Application temperature range
| Operating temperature range | : -40oC to +70oC |
| Storage / Transport temperature range | : -40oC to +70oC |
| Installation temperature range | : -10oC to +60oC |
Mechanical & environmental performance test
| S/N | Item | Test Method | Acceptance Condition |
| 1 | Tensile Strength IEC 60794-1-E1 | - Load: 1.5KN - Length of cable under load: 50 m - load time: ≥1min. | - Loss change £ 0.1 dB @1550 nm - No fiber break and no sheath damage. |
| 2 | Crush Test IEC 60794-1-E3 | - Load: 1.0KN/100mm - Load time: ≥1min. | - Loss change £ 0.1 dB @1550 nm - No fiber break and no sheath damage. |
| 3 | Impact Resistance IEC 60794-1-E4 | - Points of impact: 3 -Times of per point: 1 - Impact energy:4.5Nm - Radius of hammer head: 12.5mm | - Loss change £ 0.1 dB @1550 nm - No fiber break and no sheath damage. |
| 4 | Repeated Bending IEC 60794-1-E6 | - Bending radius: 20 x cable diameter - Load: 150 N - Flexing rate: 3 sec/cycle - No. of cycle: 30 | - Loss change £ 0.1 dB @1550 nm - No fiber break and no sheath damage. |
| 5 | Torsion IEC 60794-1-E7 | - Length: 1 m - Load: 150 N - Twist rate: 1 min/cycle - Twist angle: ±90° - No. of cycle: 10 | - Loss change £ 0.1 dB @1550 nm - No fiber break and no sheath damage. |
| 6 | Water Penetration Test IEC 60794-1-F5B | - Height of water: 1 m - Sample length: 3 m - Test time: 24 hours | - No water shall have leaked from the opposite end of cable. |
| 7 | Temperature Cycling Test IEC 60794-1-F1 | - Temperature step: +20oC→-40oC→+70C →+20oC - Time per each step: 12 hours - Number of cycle: 2 | - Loss change £ 0.05 dB/km@1550 nm - No fiber break and no sheath damage. |
| 8 | Compound Flow IEC 60794-1-E14 | - Sample length: 30 cm - Temp: 70°C ± 2°C - Time: 24 hours | - No compound flow |
Packing
6.1 Each single cable length been wound on an iron stand-wooden composite or pure wooden drum.
6.2 Covered by plastic buffer sheet.
6.3 Sealed by strong wooden battens.
6.4At least 1m of cable inner end should be reserved for testing.
Note: The value “D” contain the seal dimension
| Cable Type | Drum length | D | d | B | b |
| GYTA | m | mm | mm | mm | mm |
| 24F | 4000 | 1180 | 450 | 680 | 630 |
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SM 24 Aerial Duct Application Optical Fiber Cable Images
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