supply of supply, installation testing and commissioningsupply, installation testing and commissioning,supply, installation testing and commissioning of block proving by digital axle counter (bpac) using ufsbi for single line operation as per rdso specn. no irs/s/105/2012 (ver.0) it comprises of auto change over facility for quad and ofc working. necessary modem for quad and ofc should be supplied along with auto changeover arrangement details are as follows. (i) universal fail safe block interface (ufsb i) with complete accessories as per rdso specn no. irs/s/104/2012 (ii) block panel as per rdso s- 32019 (iii ) relay rack with locking and sealing arrangement duly wired as per rdso: s: 32020 along with complete rel ays. (iv) block telephone with accessories as per rdso/spn/191/2005. (v) automatic media changeover alon g with additional modem as per manufactures specification for bpac using ufsbi (item no i) for supply of ab ove items. unit will be in set consisting of 02 nos. of each items. rdso item id: 3100006 sub item id: 3100 006003 [ warranty period: 30 months after the date of delivery ] ] senior section engineer gujarat 2.00 set