GYFTY Non-Metallic Non-Armored Outdoor Aerial/Duct Fiber Optic Cable

GYFTY cable

GYFTY cable

Description:

GYFTY is a non-metallic, non-armored fiber optic cable widely used in aerial (overhead) and duct (underground/conduit) transmission scenarios. It is designed to balance mechanical performance, environmental resistance, and cost-effectiveness, making it a core choice for access networks, metropolitan area networks (MANs), and rural communication infrastructures. 

Model Definition:

• F: Represents the non-metallic strength member FRP (replacing traditional steel wire, avoiding electromagnetic interference (EMI) and corrosion).

• T: Indicates the use of a loose tube structure (fibers are placed in a loose buffer tube filled with water-blocking gel, protecting fibers from external stress and moisture).

• Y: Denotes the polyethylene (PE) outer sheath (a weather-resistant, UV-resistant, and waterproof material for outdoor use).

GYFTY is a loose-tube, non-metallic reinforced, PE-sheathed outdoor cable—no metal components are used, distinguishing it from armored cables (e.g., GYTA with aluminum tape armor, GYTS with steel tape armor) or metallic-reinforced cables.

Detailed Structure:

Layer-stranding design

GYFTY Structure with Water-blocking tape & yarn as moisture resistance:

GYFTY cable

GYFTY cross section

GYFTY Structure with cable Filling Compound as moisture resistance:

GYFTY cable

GYFTY cross section

Features:

(1) Non-Metallic & Corrosion-Proof

• No steel, aluminum, or copper components—eliminates corrosion from rain, humidity, salt spray (suitable for coastal areas), or chemical environments (e.g., near factories).

• Avoids galvanic corrosion (a risk with metallic-armored cables when different metals react in moist conditions).

(2) EMI/RFI Immunity

• Non-metallic structure means no electromagnetic interference (EMI) from power lines, transformers, or industrial equipment, and no radio frequency interference (RFI) from wireless signals.

• Ideal for laying near high-voltage power cables (a common challenge for metallic cables).

(3) Lightweight & Easy Installation

• Weight: ~10-15 kg/100m (for 24-core GYFTY), significantly lighter than armored cables (e.g., GYTA: ~18-25 kg/100m).

• Flexible and easy to handle—simplifies manual pulling in ducts, overhead poles, or shallow trenches (no heavy equipment needed for armored cables).

(4) Cost-Effective

• Omits expensive metallic armor and metal reinforcement, reducing material and production costs compared to armored outdoor cables (e.g., GYTA, GYTS).

• Lower transportation and installation costs (due to light weight).

(5) Outdoor Durability

• UV-stabilized PE sheath: Resists long-term sunlight exposure (prevents sheath cracking or aging for 15-20 years).

• Multi-layer water blocking (gel + tape + yarn): Meets the "waterproof" requirement for outdoor cables (no water penetration even in submerged ducts).

Applications:

(1) Access Network "Last Mile"

• Laying from central offices (CO) to residential communities, commercial buildings, or rural villages (e.g., FTTH/FTTB outdoor distribution).

• Common in shallow trenches (0.5-1m deep) or underground ducts near homes (no need for heavy armor).

(2) Overhead Auxiliary Laying

• Strung along existing overhead poles (with lightweight hangers) for short spans (<50m) in suburban or rural areas.

• Lighter weight reduces pole load compared to armored cables.

(3) Power Utility Communication

• Laid alongside high-voltage power lines (e.g., 10kV/35kV) in power utility ducts—EMI immunity ensures stable signal transmission for power grid monitoring and control.

(4) Coastal & Humid Areas

• Corrosion resistance makes it suitable for coastal cities, islands, or wetland areas (where metallic cables rust quickly).

(5) Indoor-Outdoor Transition (Short Distances)

• Used for short outdoor segments connecting indoor equipment (e.g., from a building's outdoor distribution box to a rooftop antenna) due to its lightweight and non-metallic design.