supply of supply, installation and commissioning of universal fail safe block interface (ufsbi) for single line operation as per rdso spn no irs: s-105/2012 with latest ver & amdt. , supply, installation and commissioning of universal fail safe block interface ( ufsbi) for single line operation as per rdso spn no irs: s-105/2012 with latest ver & amdt. ea ch set consisting of following: universal fail safe block inter face for single line as per r dso spn no irs:s 105/2012 with latest version and amendement. it shall comprise of auto cha nge over facility for quad and ofc working. necessary modem for quad and ofc should be supplied along with auto changeover arrangement. qnty-02 nos block panel complete with all accessories as per rdso drg no rdso/s/32017 with latest amdt. qty-02 nos relay rack wit h dual locking and sealing arrangement as per rdso drg no rdso/s/32018 in ncluding relays for each relay rack ( qni-22 nos,qnai-06 nos,qli-02 nos,and timer-01 nos). qty-02 nos bl ock telephone with accessories as per rdso spn rdso/spn/191/2006(the block phone should work without any interruption after auto changeover). qty-02 nos. supply of reliability imp rovement kit suitable to work with ufsbi as per rdso/spn/147/2005 or latest. it comprise (i)a utomatic media changeover of modems working on redundant channels for data transmiss ion on ofc/quad /microwave radio(any two media)- 01 pair (ii) secondary modem for ufsbi for use with secondary media ofc/quad -01 pair (iii) type c & d power line (vf24ac/dc-02 no,v20c/3p h 150 v -02 nos) & data line spd ( 4 pm 4d/5t-02 nos) suitable to work with one pair ufsbi -01 se t (iv) power moniter & soft start unit pmss- 01 pair. including installation and commissioning. bidde r has to submit the supply and installation charges separately . inspection by rdso. [ warranty period: 30 months after the date of delivery ] ]