This telephone RJ11 one-to-two junction box adopts a one-input and two-output design, which can divide a telephone line into two independent output ports. The junction box uses high-quality internal wires and precise wiring technology to ensure that the signal will not be interfered or attenuated during transmission. This adapter has a simple design and is very easy to install and use. Just plug the original telephone line into the input port of the one-to-two junction box, and then connect the two devices to be connected to the two output ports respectively. The product shell is made of high-quality engineering plastics, which has good wear resistance and aging resistance, and can effectively resist collisions and scratches in daily use. Whether it is a home office, a small business or an individual user, it can meet their needs for multi-device connection and provide a flexible and convenient solution.