supply of supply, installation and commissioning of block proving axle counter using block panel and ufsbi for double line operation. , supply, installation and commissioning of block proving axle counter using block panel and u fsbi for double line operation as per rdso specification no. irs : s-105/2025 version 1 or latest amendmen t. each set consisting of following: 1-universal fail safe block interface for double line as per rdso spec.no. irs:s. 104/2012 with latest version and amdt. it shall have auto changeover facility for quad and ofc/voice channel, necessary modem for quad and ofc/voice channel to be supplied along with auto changeover arr angement. quantity of this item -02 no in one set. 2- block panel complete with all accessories as per rds o/s/32017 with latest amdt qty-02 no. 3- relay rack with double locking and sealing arrangement as per r dso drg no. rdso/s/32018 including relays for each relay rack (qn1-19 no., qna1-07no, ql1-02 and time rs-1 no). quantity of this item - 02no in one set. 4- block telephone with accessories as per rdso spec.no. rdso/spn /191/2000 or latest (the block phone should work without any interruption after auto changeove r). quantity -2no. 5- supply of reliability improvement kit suitable to work with ufsbi as per rdso/spn/147/ 2005 or latest. it comprises (a) automatic media changeover of modem working on redundant channel for d ata transmission on ofc quad micro wave radio (any two media)-1pair (b) secondary modem for ufsbi for use with secondary media ofc/quad/voice channel=1pair (c) power & data spd: type c & d: power line (vf 24 ac/dc-2no, v20c/3ph 150v-2no) & data line spd(mdp 4d/5t- 2no). (d) power monitor and soft start unit pmss - 1 pair. [ warranty period: 30 months after the date of delivery ] ]