corrigendum - tender for ofc connectivity from vigokot to bediadet with add drop points at karimshahi , bawarlabet and dharamshala , 12 core sm ua ofc , hdpe pipe 33 / 42 mm , optimux ( 34 mbps ) : 4 slot modular chassis with dual sfp ( 1+1 ) 120km , 4 x e1 , 4 x ethernet , 4 x fxo / fxs and 2 x spare slot , 48v , 25a fcbc with 4 hrs battery backup , splicing machine , otdr , ftb ( fiber termination box ) , patch cord 10 mtr , pig tail 10 mtr , brick chamber , route indicator , aerial ofc jointing box with mounting assembly , electric pole wire mounting brackets , guide wire for ofc , gi pipes 2 inch , splicing & joint enclosure , digging , trenching and laying of ofc , installation and commissioning , amc charges on items ser no 3 to 6