... households at guard room.(6).Emergency call function.(8)Security functions,6 alarm zones:NC,NO and 24 ... 4 monitor & 1 audio handset) and 2 front door cameras connection.(4).Internal call & conversation function: between extended ... camera.(9).Up to 4 pcs of common gate cameras connection in a building.(optional)3.Parameter(1). ... :fixed board,screw,manual,patch cord,network cable.7.Certificate: CE/RoHs.