【Writer/ Henry Hsiang】
Previously, PA system was only for broadcasting with two speakers and cable for sound transmittance. Later on addressable broadcast came on the market. In order to go with decoder, 2 to 3 lines were required for power supply and message transfer. Various customers usually have questions about “Why does BXB’s PA system is equipped with 7 wires, and what are they for?”
Seven core wires is one of BXB’s main feature of PA system. With these seven wires, BXB integrates emergency call, door access, and other campus security except for the traditional broadcasting function that provides a more complete service. Following are the functions of each core wire and how do they connect with decoder to integrate security.