GYFTS fiber optic cable is an outdoor loose-tube fiber optic cable that uses a non-metallic central strength member, stranded loose tubes, water-blocking materials, steel tape armor, and a polyethylene (PE) outer sheath. The steel tape provides additional mechanical protection against crushing, impact, moisture, and rodents, while the FRP central strength member keeps the cable electrically non-conductive at its core.

Compared with the unarmored GYFTY fiber optic cable, GYFTS provides stronger mechanical and environmental protection but is generally heavier, less flexible, and no longer a completely all-dielectric cable because of its steel armor.

For this reason, GYFTS is commonly considered when a fiber optic network needs more physical protection than a standard GYFTY cable can provide, particularly in outdoor aerial, duct, pipeline, and other demanding installation environments.

What Does GYFTS Mean?

GYFTS is a designation used to describe a particular construction of outdoor fiber optic cable. Although naming conventions can vary slightly between manufacturers and regional standards, the typical GYFTS construction can be summarized as:

• G – outdoor communication optical cable
• Y – polyethylene-related sheath/construction designation
• F – non-metallic strength member, typically FRP
• T – stranded loose-tube structure
• S – steel tape armor

In practical terms, the most important feature of GYFTS is the combination of a non-metallic FRP central strength member and steel tape armor.

The optical fibers are normally placed inside high-modulus PBT loose tubes. The tubes are stranded around the central FRP strength member, while water-blocking compounds or other water-blocking materials are used to reduce the risk of longitudinal water penetration. A longitudinally applied coated steel tape is then used as armor, followed by an outer PE sheath.

This construction gives GYFTS a useful balance between optical-fiber protection, mechanical strength, moisture resistance, and outdoor durability.

GYFTS Fiber Optic Cable Construction

Understanding the internal construction of GYFTS is important when comparing it with GYFTY, GYTS, GYTA, or other outdoor fiber optic cables.

A typical GYFTS cable contains the following major components.

1. Optical Fibers

The optical fibers are the transmission medium of the cable. Depending on the network design, GYFTS can be manufactured with different fiber types, including single-mode fibers such as G.652D and other application-specific fiber types. Some manufacturers also offer multimode configurations.

For long-distance telecommunications and outdoor backbone networks, single-mode fiber is generally the more common choice.

2. Loose Tubes

The fibers are placed inside loose tubes rather than being tightly bonded to the cable jacket.

The loose-tube design gives the fibers additional freedom to move within the tube when the cable experiences temperature changes, tensile loading, or other mechanical stress.

The loose tubes are generally made from high-modulus materials such as PBT and are filled with a water-resistant or thixotropic filling compound. This compound helps protect the fibers and limits water movement inside the tube.

3. Central FRP Strength Member

One of the defining characteristics of GYFTS is its non-metallic central strength member.

FRP stands for Fiber Reinforced Plastic. It provides mechanical strength without introducing a conductive metallic element into the center of the cable.

This helps improve tensile performance and corrosion resistance and can be useful in environments where a non-metallic central strength member is preferred.

However, it is important to distinguish this from a completely dielectric cable: GYFTS contains steel tape armor, so the finished cable is not all-dielectric.

4. Water-Blocking Materials

Water protection is critical for outdoor fiber optic cables.

A typical GYFTS design uses filling compound inside the loose tubes and may also use water-blocking material in the cable core. The objective is to reduce the movement of water along the cable and protect the optical fibers from moisture-related degradation.

Full-section or longitudinal water-blocking constructions are available depending on the manufacturer's design.

5. Steel Tape Armor

The letter S in GYFTS is particularly important because it indicates the steel-armored construction.

A coated or plastic-coated steel tape is typically applied longitudinally around the cable core. This armor increases resistance to:

• Crushing
• Mechanical impact
• External pressure
• Rodent damage
• Certain installation hazards
• Moisture penetration

The steel armor is one of the major differences between GYFTS and GYFTY.

6. PE Outer Sheath

The outer jacket is commonly made from polyethylene.

PE provides protection against outdoor environmental conditions such as moisture, UV exposure, abrasion, and temperature variation. Cable specifications vary by manufacturer, so the actual operating temperature, sheath material, diameter, weight, and mechanical ratings should always be confirmed from the product datasheet.

Key Advantages of GYFTS Fiber Optic Cable

1. Excellent Mechanical Protection

The biggest advantage of GYFTS is its steel tape armor.

Compared with an unarmored GYFTY cable, GYFTS has an additional mechanical protection layer. This makes it better suited to installations where the cable may be exposed to crushing forces, impact, rodents, or other physical hazards.

Steel tape armor is particularly useful when cable protection is a major design requirement.

2. Good Water and Moisture Resistance

Outdoor fiber cables must be designed to prevent water from reaching the optical fibers.

GYFTS can incorporate water-blocking filling compounds and water-blocking structures around the cable core. The steel tape can also contribute to moisture protection when combined with the appropriate sheath and sealing design.

This makes GYFTS suitable for many outdoor communication environments.

3. Non-Metallic Central Strength Member

The FRP central strength member provides mechanical reinforcement while avoiding a metallic central strength element.

FRP is also resistant to corrosion and is widely used in fiber optic cable construction because of its favorable strength-to-weight characteristics.

4. Better Rodent Resistance Than Unarmored Cable

Rodent damage can become a serious problem in outdoor, underground, utility, railway, industrial, and infrastructure networks.

Because GYFTS incorporates steel tape armor, it generally offers substantially better physical protection against rodents than an unarmored GYFTY cable.

For projects where rodent protection is important, an armored construction can reduce the risk of cable damage.

5. Suitable for Harsh Outdoor Environments

GYFTS is designed primarily as an outdoor cable.

With loose-tube construction, water blocking, steel armor, and PE jacketing, it can be configured for demanding outdoor network environments.

Typical applications include telecommunications infrastructure, backbone networks, access networks, duct installations, and some aerial installations.

GYFTS Fiber Optic Cable Applications

GYFTS is a versatile outdoor cable, but the exact installation method should always be selected according to its mechanical ratings and the manufacturer's specifications.

1. Outdoor Telecommunication Networks

GYFTS can be used in outdoor communication networks where stronger mechanical protection is required.

It can be deployed in:

• Telecommunications backbone networks
• Metropolitan area networks
• Access networks
• Local communication networks
• Long-distance communication systems
• Fiber distribution infrastructure

Its loose-tube design is well suited to outdoor temperature and mechanical conditions.

2. Fiber Optic Duct Installation

Duct installation is one of the common applications for GYFTS.

The cable can be installed inside underground communication ducts, pipelines, and other protected pathways.

The armored structure provides additional protection during installation and subsequent operation.

However, the cable's outer diameter, weight, minimum bend radius, pulling tension, and duct dimensions must be considered before installation.

3. Aerial Fiber Optic Networks

Some GYFTS constructions can be used for aerial applications.

However, GYFTS should not automatically be considered an ADSS cable.

ADSS is specifically designed as an all-dielectric self-supporting aerial cable and has a construction and mechanical design optimized for span installation.

GYFTS may be used aerially in configurations where appropriate supporting hardware or installation methods are provided, but the specific product must be approved by its manufacturer for the intended aerial installation.

4. Pipeline and Industrial Communication

GYFTS can be considered for industrial communication infrastructure and pipeline routes where mechanical protection is important.

The armored construction can provide additional protection against external mechanical damage compared with an unarmored cable.

5. Outdoor Backbone Networks

For outdoor backbone networks, cable reliability is often more important than minimizing cable weight.

GYFTS can be an attractive option when network designers need a combination of:

fiber capacity + water resistance + mechanical protection + outdoor durability.

GYFTS vs GYFTY: What Is the Difference?

The easiest way to understand the difference is:

GYFTY is generally an unarmored non-metallic loose-tube outdoor fiber optic cable, while GYFTS adds steel tape armor for increased mechanical protection.

Both cable types can use a central FRP strength member and stranded loose tubes.

The main difference is the armor.

Feature	GYFTS	GYFTY
Cable structure	Stranded loose tube	Stranded loose tube
Central strength member	Typically FRP	Typically FRP
Steel tape armor	Yes	No
All-dielectric finished cable	No	Yes
Mechanical protection	Higher	Lower
Crush resistance	Generally higher	Generally lower
Rodent resistance	Better	Lower
Weight	Generally higher	Generally lower
Flexibility	Generally lower	Generally higher
Corrosion resistance	Good, but includes steel armor	Excellent all-dielectric construction
EMI/lightning environments	Less suitable than all-dielectric GYFTY	Excellent choice
Outdoor application	Yes	Yes
Duct application	Yes	Yes
Aerial application	Depends on installation design	Depends on installation design
Cost	Usually higher	Usually lower
Best for	Physically demanding environments	Lightweight, non-metallic applications

Feiboer describes GYFTY as an outdoor cable using an FRP central strength member, gel-filled loose tubes, water-blocking construction, and an all-dielectric design.

By comparison, GYFTS adds steel tape armor, providing an additional mechanical protection layer.

GYFTS vs GYFTY: Which Cable Should You Choose?

The right choice depends primarily on the installation environment.

Choose GYFTS when:

• Mechanical protection is a high priority.
• Rodent damage is a concern.
• The cable may experience external crushing.
• The installation environment is physically demanding.
• Additional armor is required.
• The network is installed in ducts or outdoor infrastructure where cable protection is important.
• The additional weight of steel armor is acceptable.

Choose GYFTY when:

• An all-dielectric cable is required.
• Lightning exposure is a major concern.
• Electromagnetic interference is a concern.
• The cable is installed around high-voltage infrastructure.
• Lower cable weight is important.
• A simpler and more flexible cable structure is preferred.
• Strong mechanical armor is not necessary.

A key point is that GYFTY's all-dielectric construction is a major advantage in environments involving electrical interference or lightning exposure. FiberHome specifically identifies the all-dielectric design as eliminating electromagnetic induction effects.

Therefore, adding steel armor is not automatically an upgrade. It is a trade-off between mechanical protection and electrical/non-metallic performance.

GYFTS vs GYFTY: Mechanical Performance

From a mechanical protection perspective, GYFTS normally has the advantage.

The steel tape provides an additional barrier against external forces. This is especially useful when the cable could be exposed to crushing, impact, or rodent activity.

GYFTY relies primarily on its PE sheath, central FRP member, loose-tube construction, and water-blocking materials for protection.

Consequently:

GYFTS = stronger physical protection

GYFTY = lighter and more electrically isolated

The exact tensile and crush performance must not be inferred solely from the cable name. Different manufacturers can offer different cable diameters, fiber counts, materials, and mechanical ratings.

GYFTS vs GYFTY: Electrical Performance

This is one of the most important differences.

GYFTY is designed as an all-dielectric cable, meaning it does not contain metallic armor in the standard construction.

GYFTS contains steel tape.

Therefore, if the project requires a fully non-metallic cable for lightning-prone or high-voltage environments, GYFTY may be the more appropriate option.

If mechanical protection is more important than maintaining a completely dielectric construction, GYFTS may be preferable.

This distinction is particularly important for utility networks and installations near electrical infrastructure.

GYFTS vs GYFTY: Weight and Installation

Steel armor inevitably adds material to the cable.

As a result, a GYFTS cable with the same fiber count and comparable dimensions will generally be heavier than an unarmored GYFTY design.

A heavier cable can affect:

• Pulling tension
• Duct fill
• Transportation cost
• Installation labor
• Aerial loading
• Cable handling

For long-distance installations, even a small difference in kilograms per kilometer can become significant.

Therefore, cable weight should be included in the initial network design rather than considered only after cable selection.

GYFTS vs GYFTY: Cost

GYFTY is generally simpler because it does not require a steel armor layer.

GYFTS adds steel tape and additional manufacturing materials, so it will often have a higher unit cost.

However, comparing only the cable price can be misleading.

A lower-cost GYFTY cable may require additional mechanical protection in a demanding environment. Conversely, choosing GYFTS where armor is unnecessary can increase material and installation costs.

The best approach is to compare:

Cable price + installation cost + protection requirements + maintenance risk + expected service life.

Is GYFTS Better Than GYFTY?

There is no universal answer.

GYFTS is better when physical protection is the primary requirement.

GYFTY is better when lightweight, all-dielectric construction, and resistance to electromagnetic induction are the primary requirements.

In other words, these two cables are designed to solve different engineering problems.

GYFTS emphasizes mechanical protection.

GYFTY emphasizes non-metallic construction and lower weight.

The correct cable is therefore determined by the installation environment rather than by the cable model alone.

GYFTS vs GYTS

GYFTS is sometimes confused with GYTS because both can use steel tape armor.

The key difference is the central strength member.

A typical GYTS construction uses a metallic central strength member, while GYFTS typically uses a non-metallic FRP central strength member and steel tape armor.

Therefore:

GYTS = metallic central strength member + steel tape armor

GYFTS = non-metallic FRP central strength member + steel tape armor

This distinction can be important for applications where a non-metallic central reinforcement is preferred.

GYFTS vs GYTA

GYFTA and GYFTS are similar in basic construction, but the armor material differs.

GYFTA typically uses aluminum tape armor, while GYFTS uses steel tape armor.

Therefore:

GYFTA → aluminum armor

GYFTS → steel armor

Steel generally provides stronger mechanical protection, while aluminum can provide advantages related to weight and electrical characteristics.

The correct choice depends on the project requirements.

How to Select the Right GYFTS Fiber Optic Cable

Before purchasing GYFTS cable, network engineers and buyers should evaluate at least the following parameters.

1. Fiber Count

Common configurations can range from low fiber counts to high-capacity designs.

Select the fiber count according to the current network requirement while considering future expansion.

2. Fiber Type

For most long-distance outdoor telecommunication applications, single-mode fiber is common.

G.652D is widely used, while G.657 and other fiber types may be selected for specific applications.

3. Cable Diameter

Cable diameter affects:

• Duct compatibility
• Bend radius
• Installation space
• Cable weight
• Pulling performance

4. Tensile Strength

The maximum allowable tensile load must be checked before installation.

The required tensile strength depends on installation method, cable length, pulling method, and environmental conditions.

5. Crush Resistance

If the cable will be installed in areas with heavy external loads, crush resistance becomes particularly important.

The steel tape construction of GYFTS can provide an advantage in this respect.

6. Operating Temperature

Outdoor cables can experience substantial temperature fluctuations.

Always verify the manufacturer's operating and storage temperature ranges rather than assuming a universal value.

7. Outer Sheath

PE is common for outdoor GYFTS cables.

However, special sheath materials may be available for projects involving flame retardancy, special environmental conditions, or other requirements.

8. Water Blocking

For underground and outdoor applications, verify whether the cable uses:

• Tube filling compound
• Cable filling compound
• Water-blocking tape
• Water-blocking yarn
• Full-section water-blocking construction

The actual design can vary between manufacturers.

GYFTS Installation Considerations

Proper installation is essential for achieving the expected service life of a GYFTS cable.

The installer should pay attention to:

Avoid Excessive Pulling Tension

Excessive pulling force can damage the cable structure or place unnecessary stress on the optical fibers.

Respect the Minimum Bend Radius

The minimum bend radius is normally specified separately for installation and operation.

The manufacturer's datasheet should always be followed.

Use Appropriate Duct Size

For duct installation, cable diameter and duct fill should be checked before installation.

Protect Cable Ends

Cable ends should be properly sealed during transportation and installation to prevent moisture from entering the cable.

Avoid Sharp Bends

Even armored cables should not be treated as indestructible. Sharp bends can affect the cable structure and optical performance.

Frequently Asked Questions About GYFTS Fiber Optic Cable

What is GYFTS fiber optic cable?

GYFTS is an outdoor stranded loose-tube fiber optic cable that typically uses an FRP non-metallic central strength member, water-blocking materials, steel tape armor, and a PE outer sheath.

Is GYFTS an armored fiber optic cable?

Yes. GYFTS normally uses steel tape armor, making it an armored outdoor fiber optic cable.

Is GYFTS all dielectric?

No. Although GYFTS typically uses a non-metallic FRP central strength member, it contains steel tape armor. Therefore, the finished GYFTS cable is not completely all-dielectric.

GYFTY is the more typical choice when a fully dielectric construction is required.

What is the difference between GYFTS and GYFTY?

The main difference is armor.

GYFTS uses steel tape armor, while GYFTY is normally unarmored and all-dielectric.

Is GYFTS suitable for outdoor use?

Yes. GYFTS is primarily designed for outdoor communication networks and can be configured for applications such as duct, pipeline, and certain aerial installations.

Is GYFTS suitable for direct burial?

Some GYFTS designs may be suitable for direct burial, but this should never be assumed from the cable name alone. Direct-burial applications require appropriate mechanical, moisture, and environmental ratings from the manufacturer.

Is GYFTS suitable for aerial installation?

Some GYFTS cables can be used in aerial applications with appropriate installation hardware and support methods. However, GYFTS should not be confused with ADSS, which is specifically designed as a self-supporting aerial cable.

Is GYFTS better than GYFTY?

Neither is universally better.

GYFTS is generally better for environments requiring greater mechanical protection, while GYFTY is better when an all-dielectric and lightweight construction is required.

Conclusion: GYFTS Is a Strong Choice for Protected Outdoor Fiber Networks

GYFTS fiber optic cable is designed for outdoor networks where mechanical protection, water resistance, and reliable fiber protection are important.

Its typical construction combines:

Optical fiber + loose tube + water blocking + FRP central strength member + steel tape armor + PE sheath.

The most important advantage of GYFTS over GYFTY is the addition of steel tape armor. This improves physical protection against crushing, impact, and rodents, but it also increases cable weight and means that the finished cable is no longer completely dielectric.

For projects where lightning protection, electromagnetic isolation, or extremely low cable weight is the priority, GYFTY may be a better solution.

For projects where mechanical protection is more important, GYFTS can provide a stronger and more robust cable construction.

The best selection should therefore be based on the actual installation environment, including fiber count, cable route, mechanical loading, water exposure, rodent risk, electrical environment, installation method, cable weight, and required service life.

In short:

Choose GYFTS when you need an outdoor loose-tube fiber optic cable with steel tape armor and strong mechanical protection. Choose GYFTY when you need a lightweight, all-dielectric outdoor fiber optic cable.

This simple distinction makes GYFTS vs GYFTY much easier to understand and provides a practical starting point for selecting the right fiber optic cable for outdoor communication infrastructure.