annual rate contract towards maintenance services of bcpl ofc network and foot patrolling of pipeline rou / ofc route of bcpl please refer tender documents . , part-i ofc maintenance service , a . fault restoration of optical fiber cable as per scc & sow , attending of ofc fault in lepetkata plant including naptha pipeline . , restoration of ofc fault in lepetkata plant including naptha pipeline , attending of ofc fault along lepetkata duliajan pipeline including gdu duliajan . , restoration of ofc fault along lepetkata duliajan pipeline including gdu duliajan , attending of ofc fault along lepetkata lakwa pipeline including bcpl lakwa plant , restoration of ofc fault along lepetkata lakwa pipeline including bcpl lakwa plant , b . preventive maintenance of bcpl ofc node as per sow & scc , preventive maintennace of ofc nodes inside lepetkata plant , preventive maintennace of ofc node in gdu duliajan , preventive maintennace of ofc node in bcpl lakwa plant , preventive maintennace of ofc node sv#1 ( ldpl ) , preventive maintennace of ofc node sv#2 ( ldpl ) , preventive maintennace of ofc node sv#1 ( llpl ) , preventive maintennace of ofc node sv#2 ( llpl ) , preventive maintennace of ofc node sv#3 ( llpl ) , preventive maintennace of ofc node sv#4 ( llpl ) , preventive maintennace of ofc node naptha umloading palnt in railway siding , c . laying of ofc through hdpe conduit as per sow & scc , through manual excavation and backfilling , through horizontal directional drilling method , d . supply & installation as per sow & scc , pcc jointing chamber as per specification , joint closure 24 fibre , liu 24 fibre , pig tail as per specificaton , part-ii pedestal surveillance service as per scope of work , foot patrolling service along lepetkata duliajan pipeline , foot patrolling service along lepetkata lakwa pipeline , foot patrolling service along lepetkata railway siding naptha pipeline along including lepetkata plant