Supply Of Universal Fail Safe Block Interface Etc ( Detail Description As Per Item Description ) Universal Fail Safe Block Interface Etc ( Detail Description As Per Item Description ) , Universal Fail Safe Block Interface For Double Line Complete With All Accessories As Per Rdsos Specification No.Irs:S-105 / 2012 ( Ver.0 ) , Each Block Section Mainly Comprises Of1. Dc-Dc Converters- 2 Sets 2. Ufsbi Digital System- 2Sets3. Relay Rack With Due Locking & Sealing Arrangement Including Relays Qn1 = 38 Nos., Qna1 = 14 Nos., Ql1 = 4 Nos, Timer = 2 Nos. 4. Block Panel Complete With Accessories As Rdso Drg. No. Rdso / S / 32017 Or Latest Amendment- 02 Nos. 5. Block Telephone With Accessories. The Block Phone Should Work Without Any Interruption After Auto Changeover Necessary Modem For Quad And Ofc Working Should Be Supplied Along With Auto-Changeover Arrangement [ Warranty Period: 30 Months After The Date Of Delivery ]