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Author: James Publish Time: 21-07-2025 Origin: Site
Outdoor Duct Optical Cables are strands of specially designed fiber optic cable that are ideally suitable for deployment in underground conduits or ducts. This type of cable guarantees total security for optical fibers while providing long-distance, high-speed data transmission. Duct cables are widely used in backbone networks, metropolitan area networks (MANs), and access networks, particularly in situations where underground ducting provides a secure and stable routing.
The rugged optical fiber cables designed for duct installation are composed of several components, including strength members, water-blocking features, armoring (metal or non-metallic), and outer sheath (PE or self-contained).
These cables' structure guarantees that they will withstand wet, harsh, and extreme weather cuts as well as mechanical stress.
Common design features include:
The design is a loose tube filled with a water-blocking compound
Occasional armoring with steel or aluminum tape
The Central Strength Member is a CSM made of steel or FRP.
Corrugated steel tape or steel wires for enhanced mechanical protection.
A black polyethylene (PE) outer sheath for UV (ultraviolet rays) and chemical resistance.
Download Outdoor Optical Fiber Cable PDF
The selection of models used in duct laying is well documented and highlighted in the PDF:
Model | Structure | Strength Member | Armoring | Fiber Count | Sheath Type |
| GYTA | Loose tube with AL-tape + PE | Central Steel | Aluminum tape | 2–288 | PE |
Loose tube with Steel tape + PE | Central Steel | Steel tape | 2–288 | PE | |
All-dielectric, no metal parts | FRP | None | 2–144 | PE | |
All-dielectric, with AL-tape | FRP | Aluminum tape | 2–144 | PE | |
GYFTW | FRP with dual steel wires | FRP | None | 2–144 | PE |
Central loose tube with steel wires | Central FRP | Steel wires | 2–12 | PE | |
Central tube with steel tape | Central Steel | Steel tape | 2–12 | PE |
✅ These cables are non-self-supporting, intended for duct laying, and in some cases, can also be installed in aerial lashing scenarios.
Customize Your Outdoor Optical Fiber Cable
Installation Scenario | Recommended Cable Type | Description |
Underground conduit (standard) | GYTA, GYTS, GYFTY | Standard PE-sheathed cables with good mechanical and waterproof performance |
High humidity or flooding zones | GYTS, GYXTS, GYTA53 | Steel tape armored cables for enhanced moisture resistance |
Urban telecom duct systems | GYFTY, GYFTA | Non-metallic construction, resistant to electromagnetic interference |
Power-cable shared trenches | GYFTY, GYFTW | All-dielectric cables ideal for electric environments |
Short-distance or indoor drops | GYXTW, GYXTS | Small core count, flexible deployment in limited spaces |
Feature Requirement | Suggested Cable Model | Explanation |
Metallic armored protection | GYTS, GYTA | Steel/Aluminum armor enhances crush & rodent resistance |
All-dielectric (no metal) | GYFTY, GYFTA | Ideal for lightning-prone or EMI-sensitive installations |
High fiber count (>144 cores) | GYTA, GYTS | Multi-loose tube designs support large capacity networks |
Self-supporting (limited span) | GYFTW, GYXTW | Built-in FRP or steel wire strength members |
Cost-sensitive deployments | GYTA, GYFTY | Widely used, high-performance-to-cost ratio |
Project Need | Fiber Type | Notes |
Standard long-distance transmission | G.652.D | Low loss, widely compatible |
Tight bending or dense duct networks | G.657.A1/A2 | Bend-insensitive fiber ideal for FTTH and urban ducts |
High-capacity metro or access fiber | G.652.D / G.657 | Both are backward-compatible and reliable |
Model | Armored | Metallic | Self-supporting | Fiber Count | Recommended Use |
Al-tape | ✅ | ❌ | 2–288 | Underground ducts, backbone | |
Steel | ✅ | ❌ | 2–288 | Damp underground areas | |
None | ❌ | ❌ | 2–144 | City ducts, EMI-sensitive zones | |
Al-tape | ❌ | ❌ | 2–144 | Power co-location environments | |
GYFTW | None | ❌ | ✅ | 2–144 | Short spans, duct + aerial use |
Steel | ✅ | ✅ | 2–12 | Outdoor drop, last-mile fiber | |
Steel | ✅ | ❌ | 2–12 | Local duct drops |
Buyer Tips
Ducts with pull-rope inside: Use non-self-supporting models like GYTA or GYTS
Electric interference concerns: Choose non-metallic models like GYFTY or GYFTA
Rodent-prone or high-risk areas: Choose steel tape armored cables like GYTS
High-volume splicing required: Consider ribbon fiber versions (e.g., GYDTA) for faster fusion
The outdoor duct fiber cables are perfect for:
Long-run telecommunication trunk lines
Metropolitan backbone connections
Access networks linking centers and exchanges
Underground cable duct or subway
Fiber optic cables (FTTH) installations
Fiber color coding follows TIA/EIA-598 or YD/T standards, using the standard 12-color sequence (Blue, Orange, Green, Brown, Grey, White, Red, Black, Yellow, Violet, Pink, Aqua). Tubes are coded similarly. Additional fiber counts repeat the color sequence with color ring marks.
No. | 1 | 2 | 3 | 4 | 5 | 6 |
Color | Blue | Orange | Green | Brown | Gray | White(Natural) |
No. | 7 | 8 | 9 | 10 | 11 | 12 |
Color | Red | Black | Yellow | Violet | Pink | Aqua |
Note:
1. If there are less than 12 fibers in a loose tube, the color sequence is followed continuously, starting from No.1,
2. In the standard color sequence, No.6 white color can be replaced by natural color, called the W color sequence.
3. Color arrangement can be customized.
No. | 1 | 2 | 3 | 4 | 5 | 6 |
Color | Blue | Orange | Green | Brown | Gray | White(Natural) |
No. | 7 | 8 | 9 | 10 | 11 | 12 |
Color | Red | Black | Yellow | Violet | Pink | Aqua |
Each cable length is supplied on robust wooden drums, wrapped with a plastic sheet and sealed with battens. Typical marking includes:
Manufacturer Logo & Fiber Type (e.g., G.652D)
Fiber Count & Cable Type (e.g., GYTA 96C)
Meter Marking every 1m
Drum marking includes origin, project ID, and contract details
Standard drum lengths range from 2000–4000 meters, with at least 96% usable cable length per drum.
Zion Communication offers:
✔ Large selection of outdoor fiber cable categories.
✔ A/B (OEM/ODM) branding into the problem you need.
✔ Compatibility with ITU-T, IEC, and TIA/EIA standards.
✔ Cost-effective and rapid delivery.
Contact us now to get datasheets, samples, and a project-based quote.
James is a technical manager and associate at Zion Communication.
Specializes in Optical Fiber communications, FTTH Solutions,
Fiber optic cables, ADSS cable, and ODN networks.
james@zion-communication.com
+86 13777460328
