বেঙ্গল টেলিফোন কোম্পানি, কাউন্সেল হাউস স্ট্রিট, কলকাতা, ১৮৮৩ In 1881 license was granted to the original Oriental Telephone Company Limited of England for opening Telephone Exchanges at five metropolitan cities of India. On 28th January, 1882 , Major E. Baring, Member of the Governor General’s Council declared open the Telephone Exchange in Calcutta, Madras and […]

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