WJ-3049-1066 is an industrial-grade standard RJ11 6P4C sunk-board telephone interface socket, fully compliant with ITU-T K.10, GB/T 15157, and other domestic and international general interface standards. It is specifically designed for PCB on-board voice transmission and low-speed data communication scenarios. The product adopts a sunk-board integrated compact structure, paired with a fully enclosed metal shielding shell and high-reliability gold-plated contacts, providing a balance of stable transmission performance, excellent electrical insulation, and convenient industrial installation adaptability. It is a universal high-reliability connecting device in the fields of program-controlled switching equipment, security intercom systems, industrial control terminals, and communication access equipment.