Product Overview
GYTS is an outdoor stranded loose tube fiber optic cable with corrugated steel tape armor and a black PE outer sheath. It is designed for duct, conduit and protected backbone routes requiring increased crush resistance and mechanical protection.
Construction: Stranded loose tube
Armor: Corrugated steel tape
Reference fiber count: 4–144 fibers
Outer sheath: Black polyethylene
Temperature range: -40°C to +70°C
Product Overview
What Is a GYTS Fiber Optic Cable?
GYTS is an outdoor armored optical cable using a stranded loose tube cable core, water-blocking materials, corrugated steel tape and a black polyethylene outer sheath.
The 250 μm optical fibers are placed inside high-modulus plastic loose tubes filled with water-blocking compound. The loose tubes and filler elements are stranded around a metallic central strength member to form a compact circular cable core.
After the cable core is water blocked, corrugated steel tape is applied around it before the PE outer sheath is extruded. The steel tape provides greater crush and mechanical protection than an aluminum-laminate GYTA construction, making GYTS suitable for protected outdoor routes with increased mechanical requirements.
Cable Construction
GYTS Cable Structure
Optical Fibers
250 μm single-mode or multimode optical fibers selected according to the required network and transmission specification.
Gel-Filled Loose Tubes
High-modulus plastic loose tubes contain the fibers and filling compound, helping protect them against moisture and mechanical stress.
Central Strength Member
A metallic strength member provides the central support for the stranded cable core. Certain high-count constructions may use a PE-coated strength member.
Stranded Cable Core
Loose tubes and fillers are stranded around the strength member to maintain the required geometry and fiber arrangement.
Water-Blocking Materials
Cable-core filling and water-blocking materials help reduce longitudinal moisture migration inside the cable.
Corrugated Steel Tape
A corrugated steel tape layer surrounds the water-blocked cable core to provide increased crush resistance and mechanical protection.
PE Outer Sheath
A black polyethylene sheath protects the armor and internal cable elements against the outdoor environment.
Product Benefits
GYTS Cable Features
Stranded loose tube structure supports stable optical performance under temperature and installation stress.
High-modulus loose tubes provide mechanical strength and hydrolysis resistance.
Tube filling compound protects optical fibers within each loose tube.
Water-blocked cable core helps limit longitudinal moisture migration.
Corrugated steel tape provides increased crush and mechanical protection.
Compact cable-core geometry helps reduce loose-tube movement and retraction.
Black PE outer sheath provides outdoor weather and UV protection.
Fiber count, fiber type, jacket marking, drum length and packing can be configured for approved OEM orders.
Network Applications
Where Is GYTS Cable Used?
Duct and Conduit Routes
GYTS is used in outdoor duct and conduit networks where additional mechanical protection is required around the cable core.
Telecom Backbone Networks
The cable can support metropolitan, access and long outdoor backbone routes between communication facilities and distribution points.
Industrial Communication Routes
Steel tape armor can provide additional protection in controlled industrial routes exposed to greater mechanical contact or pressure.
Supported Aerial Routes
GYTS may be lashed to an approved messenger wire where the supporting method, tensile load, span and environmental conditions have been verified.
Standard GYTS is not a self-supporting aerial cable. Steel tape armor does not automatically make every GYTS construction suitable for direct burial. Where increased burial and moisture protection are required, a double-sheath armored cable such as GYTS53 should be evaluated.
Reference Data
GYTS Fiber Optic Cable Specifications
| Fiber Count | Loose Tubes | Fillers | Reference Weight kg/km | Long-Term Tensile N | Short-Term Tensile N | Long-Term Crush N/100 mm | Short-Term Crush N/100 mm | Static Bend Radius | Dynamic Bend Radius |
|---|---|---|---|---|---|---|---|---|---|
| 4 | 1 | 4 | 96 | 600 | 1500 | 300 | 1000 | 10D | 20D |
| 12 | 2 | 3 | 96 | 600 | 1500 | 300 | 1000 | 10D | 20D |
| 24 | 4 | 1 | 96 | 600 | 1500 | 300 | 1000 | 10D | 20D |
| 48 | 4 | 1 | 111 | 600 | 1500 | 300 | 1000 | 10D | 20D |
| 96 | 8 | 0 | 168 | 600 | 1500 | 300 | 1000 | 10D | 20D |
| 144 | 12 | 0 | 228 | 600 | 1500 | 300 | 1000 | 10D | 20D |
D represents the nominal cable diameter. These are reference configurations based on the available product document. Final cable diameter, weight, loose-tube arrangement, steel-tape construction and mechanical performance must be confirmed against the approved manufacturing specification.
GYTS or GYTA
When Should You Select GYTS Instead of GYTA?
| Selection Point | GYTS | GYTA |
|---|---|---|
| Protective layer | Corrugated steel tape | Aluminum-polyethylene laminate |
| Primary advantage | Greater mechanical and crush protection | Moisture barrier with lower cable weight |
| Reference weight | Higher | Lower |
| Typical selection direction | Routes with increased mechanical exposure | Duct routes prioritizing moisture protection and manageable weight |
| Direct burial | Must be confirmed; consider GYTS53 | Must be confirmed; consider GYTA53 |
Available Options
GYTS Cable Configuration Options
Inspection
GYTS Cable Testing and Quality Control
The inspection plan should follow the approved GYTS construction and the project requirements. Available checks may include:
Optical attenuation at the specified wavelengths
Fiber and loose-tube color sequence
Cable outside diameter and construction verification
Central strength member and loose-tube arrangement
Water-blocking material inspection
Steel-tape thickness, corrugation and overlap
Outer-sheath thickness, appearance and marking
Tensile and crush performance testing
Bending, temperature-cycle and water-penetration testing where required
Cable length, drum, packaging and shipping-mark inspection
Applicable requirements can be reviewed with reference to YD/T 901 and the relevant IEC 60794 series test methods. The standard edition, test scope and compliance records must be confirmed for the exact product and order.
Quotation Preparation
Information Required for a GYTS Cable Quote
Installation route and expected mechanical exposure
Required optical fiber type and fiber count
Cable construction or existing model reference
Required tensile and crush ratings
Temperature and water-blocking requirements
Length per drum and total order length
Jacket printing, labels and test-document requirements
Destination, packing method and required delivery date
Frequently Asked Questions
GYTS Fiber Optic Cable FAQs
What does GYTS mean in fiber optic cable?
GYTS identifies an outdoor stranded loose tube optical cable using corrugated steel tape armor and a polyethylene outer sheath.
What is the purpose of steel tape in GYTS cable?
The corrugated steel tape provides increased crush resistance and mechanical protection around the stranded loose tube cable core.
What is the difference between GYTS and GYTA?
GYTS uses corrugated steel tape and is selected where increased mechanical protection is needed. GYTA uses an aluminum-polyethylene laminate moisture barrier and is generally lighter.
Can GYTS cable be directly buried?
Direct-burial suitability depends on the complete cable design and installation environment. A double-sheath construction such as GYTS53 may be required for increased burial protection.
Is GYTS a self-supporting aerial cable?
No. Standard GYTS does not contain a self-supporting messenger. Aerial installation normally requires an approved external supporting method.
Can GYTS cable be customized?
Fiber type, fiber count, cable marking, reel length, testing and packing can be reviewed according to the project quantity and approved manufacturing specification.
Project Review
Request a GYTS Cable Configuration and Quote
Send the route, fiber count, mechanical requirements, drum length, quantity, testing scope and delivery destination. An existing cable marking, product photograph, drawing or specification can be used for the initial review.
