This is a black PE outdoor telephone cable, which is a type of copper drop wire with a specification of 2 core parallel 2×0.80mm, specially designed for overhead application scenarios.​ Its structure consists of 2 parallel copper conductors with a cross-sectional area of 0.80mm². The copper conductors have excellent electrical conductivity, which can ensure the stable transmission of telephone signals and reduce signal attenuation. The insulation layer is made of polyethylene (PE) material and is black. PE material not only has good electrical insulation performance, which can effectively isolate external interference and ensure the quality of signal transmission, but also has excellent weather resistance. It can resist the erosion of outdoor natural environments such as sunlight, wind and rain, and high and low temperatures, thus extending the service life of the cable.​ As a telephone cable for overhead applications, it is suitable for the erection of outdoor telephone lines and can be widely used in scenarios such as urban communication networks, rural telephone line connections, outdoor communication wiring in industrial parks and residential communities. Its 2-core parallel design is convenient for overhead installation, can work stably in the overhead environment, and provides reliable line support for telephone communication.

This telephone drop wire is a twin parallel structure specially designed for outdoor aerial use, including 18/2 and 22/2 gauges, corresponding to conductor cross-sectional areas of 2×0.8mm and 2×1.0mm. It uses copper conductors and PE insulation materials, designed specifically for outdoor telephone signal transmission.​ The conductors are made of high-purity copper, which has excellent electrical conductivity, ensuring minimal attenuation and high stability of telephone signals during transmission. Among them, the current-carrying capacity of the 2×1.0mm conductor is slightly higher than that of 2×0.8mm, which can adapt to transmission requirements of different distances and signal strengths. The insulation layer is made of polyethylene (PE) material, which has excellent weather resistance and can resist the impact of outdoor natural environments such as direct sunlight, wind and rain erosion, and high and low temperature changes. At the same time, it has good electrical insulation, effectively isolating external interference and ensuring the quality of signal transmission.​ The twin parallel structure design makes it easy for aerial installation, which can be directly erected on outdoor carriers such as electric poles and walls. It is widely used in telephone line laying in urban fringe areas and rural areas, as well as outdoor communication wiring in industrial parks and residential communities. Whether it is short-distance user access or medium-distance regional line connection, it can stably play a role in signal transmission, providing reliable line support for outdoor telephone communication.