Tender for Replacement Of Outlived Digital Electronic Telephone Exchanges With Ip Based Digital Electronic Telephone Exchanges At Saharanpur, Jagadhari Workshop, Dhuri, Patiala, Rajpura, Sirhind, Roopnagar, Nangal Dam, Chandigarh, Kalka, Bathinda, Shimla & Ambala Cantt Railway Stations Over Umb Division. in Ambala - Haryana

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