Supply, Installation, Trenching/Hdd/Clamping, Laying Of Duct, Blowing Of Ofc Through Ducts, Splicing, Testing & Commissioning For Ofc Replacement Between In Thomson Road – Phq - Ndrb–Vayu Bhawan– Sena Bhawan-Executive Enclave (Cv)– Ccs (Cv) -Ndbh – Thomson Road Section Of Railtel And Maintenance Of Ofc For 5 Years