Supply of ipbx telephone exchange unit in common zone (600 lines) at ttps site with redundancy and intercommunication with camp i and ii intercom telephone exchanges

Supply,erection and commissioning of ipbx telephone exchange in common zone 600 line) at ttps site with redundancy and intercommunication with camp i and ii intercom telephone exchanges for restoration of common zone intercommunication system in ttps

Ttps es circle em ii annual maintenance contract charges for the maintenance of 2 nos ipbx common zone telephone exchange system having 200 lines each available at ttps site camp 1 2 for the period from 01 04 2026 to 31 03 2027

Ttps es circle em ii charges for replacement of defective intercom telephone cables in camp i ii quarters area

Construction of bsnl telephone exchange at vallur camp opposite side of vallur camp gate i

Ttps es circle em ii routine maintenance and defective fault attending works in intercom telephone exchanges in operation zone and coal handling zone in ttps site for the period from 01 04 2025 to 31 03 2026