ASU (Aerial Self-supported Unitube) Mini ADSS Fiber Optic Cable S80 S100 S120
| Model | ASU (Mini ADSS) |
| Fiber Counts | 2core - 24core |
| Fiber Type | ITU-T G.652D |
| Loose Tube | PBT |
| Strength Member | 2*FRP |
| Water Resistance | Water-blocking Yarn |
| Ripcord | Polyester |
| Outer Jacket | PE |
| Application | Aerial Self-supporting Laying |
| Drum Length | 2km, 3km, 4km |
Description:
ASU (Aerial Self-supported Uni-tube) fiber optic cable, also known as "Mini ADSS", is a specialized aerial transmission cable designed for overhead laying (e.g., strung between utility poles). Its core advantage lies in the "self-supported" design—unlike traditional aerial cables that require a separate messenger wire (a steel or fiber-reinforced composite cable) for mechanical support, ASU cables integrate mechanical strength directly into their structure. This simplifies installation, reduces material costs, and makes it ideal for medium-to-long-distance outdoor communication networks.
Combine mechanical robustness (to withstand wind, ice, and environmental loads) with optical performance (low signal loss, stable transmission).
Adapt to harsh outdoor aerial environments (temperature fluctuations, UV radiation, moisture).
Structure:
ASU cables follow a layered design, with each layer serving a specific function (mechanical protection, optical signal preservation, or environmental resistance).
| Layer Name | Component | Function |
| Optical Fiber Core | Single Mode Fiber (SMF) or Multi Mode Fiber (MMF) | Transmits optical signals with low attenuation. |
| Buffer | Loose Tube PBT | a single tube houses fibers (filled with water-blocking gel to prevent moisture intrusion). |
| Strength Member | FRP (Fiber Reinforced Plastic) | Two FRP provide good tensile performance, enabling the cable to support itself in spans of up to 80m, 100m, and 120m, small size, light weight |
| Water-Blocking layer | Water-blocking yarn | Prevent water penetration into the buffer tube. |
| Tearing Measure | Polyester Ripcord | easily strip |
| Outer Sheath | UV-Resistant PE | UV resistant, and moisture - resistant, protecting the internal structure of the cable |
ASU 12Core
ASU 24Core
Characteristics:
(1) Self-Supported & Easy Installation
• No need for pre-installing a messenger wire: The integrated strength members (FRP) bear the cable's own weight and environmental loads (wind, ice).
• Reduces installation steps and labor costs: Workers can directly suspend the cable between poles, cutting deployment time by 30–50% compared to messenger-supported designs.
(2) Balanced Mechanical & Optical Performance
Mechanical durability:
• Tensile strength: 1.5–5 kN (depending on strength member type).
• Crush resistance: Withstands external pressure (e.g., from tools or falling debris) without damaging the buffer tube.
• Weather resistance: Operates in a wide temperature range (-40°C to +70°C) and resists UV aging, rain, and snow.
Optical stability:
• Low attenuation: Typical loss for SMF is <0.36 dB/km at 1310 nm and <0.22 dB/km at 1550 nm (meets ITU-T G.652D standards).
• Minimal microbending loss: The unitube design and gel filling reduce fiber microbending (caused by temperature changes or vibration), ensuring stable signal transmission.
(3) Compact & Lightweight
• Compared to ADSS cables (which have a more complex dielectric structure), ASU cables with FRP strength members are lighter and have a smaller outer diameter.
• Reduces load on utility poles, eliminating the need for pole reinforcement in most cases.
(4) Cost-Effective
• Lower Cost: Saves on messenger wire materials, installation labor, and long-term maintenance (fewer components to inspect or replace).
• Small size: Supports 2-24 fibers, adapting to both small-scale access networks (e.g., rural broadband) and large-scale backbone networks.
Applications:
ASU optical fiber cables are widely used in overhead communication scenarios where simplicity, cost, and reliability are priorities.
Deployed along rural roads or suburban neighborhoods to connect remote households to fiber-to-the-home (FTTH) networks.
Advantage: Avoids expensive underground trenching (common in low-population areas) and leverages existing utility pole infrastructure.
Used to connect core network nodes (e.g., data centers, central offices) across cities via overhead routes.
Example: Strung between poles along highways or urban main roads to supplement underground backbone cables.
Applied in power grids, railway lines, or mining areas to transmit control signals (e.g., for smart grid monitoring) or high-speed data.
Steel-reinforced ASU cables are preferred here for resistance to heavy loads (e.g., ice on power lines) and industrial hazards.
Used in emergency scenarios (e.g., natural disasters, large events) to quickly establish temporary fiber links.
Benefit: Rapid deployment (no messenger wire required) ensures fast restoration of communication services.
To better understand ASU's positioning, here's a comparison with two common alternatives:
| Item | ASU (Aerial Self-supported Unitube) | ADSS (All-Dielectric Self-Supported) | Messenger-Supported Cable |
| Support Type | Self-supported (integrated strength members) | Self-supported (all-dielectric strength members) | External messenger wire |
| Weight | Light | Medium | Heavy (cable+messenger) |
| Installation Complexity | Low (direct suspension) | Medium (requires dielectric testing) | High (install messenger first) |
| Cost | Low (smaller size) | High (dielectric+aramid materials) | Medium-High (messenger+labor) |
| Best for | Rural broadband, MAN, temporary networks | High-voltage power line corridors (no electrical conductivity) | Small-scale, low-load areas |
1. Structure Parameter
| Model | ASU (Mini ADSS) | |||||
| Fiber Type | ITU-T G.652.D | |||||
| Fiber Counts | 1-12 | 24 | ||||
| Span | 80 m | 100 m | 120 m | 80 m | 100 m | 120 m |
| Cable Diameter（mm） | 6.6 | 7.2 | 7.6 | 7.0 | 7.7 | 8.2 |
| Cable Weight（Kg/km） | 45 | 50 | 62 | 49 | 57 | 65 |
| Tensile（N） | 1500N | 1800N | 2000N | 1500N | 1800N | 2000N |
| Crush（N/100mm） | 2000N | |||||
| Min. Bending Radius (mm) | Static/Dynamic：10D/20D | |||||
| Temperature (℃) | Storage/Operation: -40℃~+70℃ | |||||
2. Fiber Color Identification
No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
Color | Blue | Orange | Green | Brown | Slate | White | Red | Black | Yellow | Violet | Pink | Aqua |
3. Fiber Parameter G.652.D (After Cable)
Item | Characteristics | Unit | Value | |
Geometrical | Cladding Diameter | μm | 125.0±1.0 | |
Cladding Non-circularity | % | ≤1.0 | ||
Core-Cladding Concentricity Error | μm | ≤0.6 | ||
Core Non-circularity | % | ≤12 | ||
Coating Diameter | μm | 245±10.0 | ||
Coating-Cladding Concentricity Error | μm | ≤12 | ||
Curl Radius | m | ≥4 | ||
Attenuation | Zero Dispersion Slope S0 | ps/nm²km | ≤0.092 | |
1625nm Attenuation | dB/km | ≤0.30 | ||
1383+/-3nm Attenuation | dB/km | ≤0.36 | ||
1310nm Attenuation | dB/km | ≤0.36 | ||
1550nm Attenuation | dB/km | ≤0.22 | ||
Point Discontinuity (1310nm & 1550nm) | dB | ≤0.05 | ||
Attenuation at 1285nm ~ 1330nm compared with 1310nm | dB | ≤0.03 | ||
Attenuation at 1485nm ~1580nm compared with 1550nm | dB | ≤0.03 | ||
Zero Dispersion Wavelength λ0 | nm | 1300≤λ0≤1324 | ||
Dispersion | 1285~1339nm Dispersion | ps/nm/km | ≤3.5 | |
1271~1360nm Dispersion | ps/nm/km | ≤5.3 | ||
1550nm Dispersion | ps/nm/km | 13.3~18.6 | ||
Nominal MFD Value（1310nm） | μm | 8.6-9.5 | ||
MFD Tolerance | μm | ±0.4 | ||
Bending | Cable Cut-off Wavelength λcc | nm | ≤1260 | |
1550nm Macro-bend Induced Attenuation（ 100turns with diameter of 60mm ） | dB | ≤0.5 | ||
PMD | Q | 0.01% | ||
Maximum Individual Fiber | ps/√km | 0.2 | ||
M | 20 cables | |||
Reel Length:
normally 2km, 3km, 4km, 5km (as your request)
Drum options:
Fumigated Wooden Drum
Steel-reinforced Wooden Drum
Plywood Drum
Sheath and Drum Marking according to customer's requirements.
Shipping Photos:
