The 24-core direct-buried optical cable is typically a GYTA53 or GYTY53 double-armored, double-sheathed fiber optic cable designed for underground installation with high mechanical and environmental protection.

Cable Construction and Features

• Fiber Count: 24 cores, available in both single-mode and multimode configurations .
• Fiber Type: 250 µm optical fibers housed in gel-filled PBT loose tubes, providing protection against moisture and mechanical stress .
• Central Strength Member: A phosphatized steel wire or metallic core provides tensile strength and strain resistance .
• Loose Tube Stranding: Tubes and filler ropes are stranded around the central strength member, allowing fibers to move freely and remain stress-free under longitudinal tension .
• Waterproofing: The loose tubes are filled with a water-blocking compound, and additional water-blocking tapes or fillers prevent water ingress .
• Armoring: The cable features corrugated steel tape and aluminum-polyethylene laminated tape (APL) for crush resistance, rodent protection, and mechanical durability .
• Sheathing: A double PE sheath (inner and outer) provides environmental protection and UV resistance .

Performance and Applications

• Direct Burial: Designed for underground installation, capable of withstanding soil pressure, moisture, and rodent attacks .
• Long-Distance Transmission: Suitable for LAN, metropolitan, and long-haul fiber networks due to low attenuation and high signal integrity .
• Environmental Resistance: Resistant to electromagnetic interference, lightning, and harsh weather conditions, making it ideal for outdoor and extreme environments .
• Mechanical Protection: The double-armored design ensures crush resistance, tensile strength, and strain relief, critical for direct-buried or duct installations .

Summary

The 24-core GYTA53/GYTY53 direct-buried optical cable is a robust, high-performance fiber optic solution for underground deployment. Its double-armored, double-sheathed construction with gel-filled loose tubes and a metallic central strength member ensures durability, water resistance, and stress-free fiber operation, making it suitable for long-distance, high-reliability fiber optic networks in harsh environments .