The PLM-8CS PLENA matrix 8 Zone Call Station is an accessory of the PLM-8M8 PLENA matrix 8 channel DSP Matrix Mixer, and like any good accessory it has a complementary aesthetic design, but behind the good looks and sleek design, there is a product of substance and usability. With one touch, the call station can call either a single zone, or a user defined group of zones. Installation couldn’t be easier; Powered over standard CAT 5 from the PLM-8M8, the unit’s communication is via RS485, this means that multiple call stations can be daisy-chained together reducing cable runs and installation time