1. Improved Mechanical Protection
Double-Armored Structure
This double-armored telephone cable utilizes a combination of a metal armor layer (such as steel tape or steel wire) and a non-metallic sheath (such as PVC or PE). This design protects against mechanical damage during construction, rodent bites, and underground environmental pressure, making it particularly suitable for complex installations such as direct burial or mines.
Tensile and Compressive Resistance
The metal armor layer's rigid structure enhances the cable's tensile strength, preventing conductor breakage due to external forces. The elastic cushioning provided by the outer sheath further dissipates external pressure.
2. Improved Signal Transmission Stability
Electromagnetic Shielding Effect
The metal armor layer effectively shields against external electromagnetic interference (such as high-voltage lines and industrial equipment), reducing signal crosstalk and ensuring the integrity of voice and data transmission.
Enhanced Environmental Adaptability
The flame-retardant and weather-resistant outer sheath (such as UV and corrosion resistance) combined with the moisture-resistant design of the armor layer ensures the cable maintains low attenuation even in high-temperature, high-humidity, and chemically corrosive environments.