HYA is a copper-core solid polyolefin insulated, moisture-proof layer with a polyethylene sheath for indoor communication cables. Primarily used for transmitting audio signals and analog signals up to 150kHz, as well as digital signals up to 2048kbit/s. Under certain conditions, it can also transmit digital signals above 2048kbit/s. Suitable for overhead or pipeline installations in urban, suburban, and local areas, and can also be directly buried.

1. Product Execution Standard: Refer to the Ministry of Posts and Telecommunications YD/T630-93 standard and Fengjin Da Enterprise standard

2. Annealed bare copper wire, diameter: 0.4mm, 0.5mm

3. Insulating Materials: High-density polyethylene, medium-density polyethylene, or polypropylene, with the colors of the insulated wires marked according to international chromatographic standards.

4. Insulated Pairing: Twisting single insulated wires into pairs at different pitch distances and using specified color code combinations for identification; this reduces crosstalk between wire pairs and minimizes power loss.

5. Sheath Material: HYA Copper Core Polyolefin Insulated Aluminum-Plastic Composite Sheath for Outdoor Use and Indoor Communication