Supply Of Isolation V.F.Transformers 600:470 Ohms As Per Rdso Specification Irs: Tc/76-2000 With Amendment No-1 Two Numbers Per Rtu & One No. For One External Modem. Inspection By Consignee. This Item Is Decontrolled By Rdso. Rdso Specification To Continue. Warranty Period: 12 Months After The Date Of D Elivery