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.

The telephone line passes through ADSL, converts the information in the computer into analog line number, and then transmits it to another telecommunication terminal through the telephone line, and then converts the analog signal into digital signal. The telephone line frequency is not high, and it is usually used for analog signal related work.