The copper-clad steel telephone wire is relatively hard and is not suitable for external cable pulling, which is easy to break the core. But it can still be used if buried in the wall. It can only be used in close range. The telephone line made of imported polypropylene material has high purity, lower transmission attenuation and higher transmission speed. It is suitable for broadband internet access and can meet the requirements of high transmission speed of videophone.

The conductor adopts the imported high-purity oxygen-free copper telephone line, with small transmission attenuation, small signal loss, clear and noiseless sound quality, and no sense of distance in the call. The sheath is made of high-grade transparent telephone wire, which is resistant to acid and alkali corrosion, anti-aging and long service life. The sheath is made of transparent telephone wire, which has good mechanical and physical properties, electrical properties and thermal stability. The content of heavy metals and heavy metal compounds such as lead and cadmium is extremely low.