supply,installation and commissioning of block proving with digital axle counter as per rdsospecification no: irs s105/2012 or latest using ufsbi and block panel for single line operation with automaticmedia change over of modems working in redundant channels for data transmission on ofc/quad and e1convertor (ethernet port to g-703) as per specification four ethernet 1 to e1 converter dual ac/dc power supply .