The GT-MCX is a network adaptor that will allow multiple GT Series systems to be connected over a network. A typical system, when expanded, will support up to 16 entrance stations, 4 video guard stations, and 500 tenant stations. When using the GT-MCX, up to 32 GT Series systems can be connected together allowing the total capacity of the system to grow to 480 entrance stations, 96 video guard stations, and 5,000 tenant stations.