Power Supply System Having Both 12V/24V Dc Output Including Battery Charger With Minimu M 7Ah, 24V Dc Mf Battery. 12V Dc Supply Shall Be Connected To The Station Telephone Unit & 24V Dc Shall Be Fed To Line Circuit For Lc Gate Telephone System As Per Specification No. Rdso/Spn/Tc-51/2011, Rev 1.0 Or Latest. Make: Bentron Or Similar. [ Warranty Period: 30 Months After The Date Of Delivery ] ]