The story
Early history
The Telegraph branch under the Posts and Telegraph Department was created in 1853 in the then British India, and was regulated afterwards under the Telegraph Act-1885. The Telegraph branch was reconstructed in 1962 in the then East Pakistan as Pakistan Telegraph and Telephone Department.
Post-independence
Following Bangladesh's independence, the Bangladesh Telegraph and Telephone Department was set up under the Ministry of Posts and Telecommunications in 1971. This was converted into a corporate body named 'Telegraph and Telephone Board' by promulgation of Telegraph and Telephone Board Ordinance, 1975. Pursuant to a 1979 ordinance, the Telegraph and Telephone Board was converted into a government board named the Bangladesh Telegraph and Telephone Board (BTTB).
Bangladesh Telecommunications Company Limited
On 1 July 2008, BTTB transformed to a government-owned Public Limited Company under a new name of Bangladesh Telecommunications Company Limited BTCL. BTCL has launched a 24-hour call centre for customers. Customers in Dhaka will be able to call the number and reach the BTCL for enquiry, according to a company media release. BTCL runs a red telephone exchange for the VIPs which is secured and always live.
From Wikipedia’s article on Bangladesh Telecommunications Company Limited, shared under CC BY-SA 4.0.4