supply of the following spares compatible for bpac using ufsbi & block panel ( deltron make ) as per rdso specification no.s.105 / 2012 / ver.0 or latest. ( 1 ) modem ( rs232 to fibre ) compatible with existing ufsbi system - 4 nos. ( 2 ) modem ( e1 ) compatible with existing ufsbi system - 4 nos. ( 3 ) flat cable set - 4 nos ( 4 ) power monitor & soft start ( pmss ) - 4 nos. ( 5 ) block telephone ( complete with ptt handset ) suitable to work with block panel & ufsbi - 4 nos. ( 6 ) supply of automatic media changeover of modems working on redundant channels for data transmission on ofc / quad - 4 nos. ( 7 ) supply of indication cum alarm box for automatic media changeover -1 no. [ warranty period: 30 months after the date of delivery ]