The engineering officers of ITS are working in senior positions in the Department of Telecommunications (DoT), Telecom Enforcement Resource and Monitoring (TERM Cells) now known as DoT Licensed Service Area (LSA), Bharat Sanchar Nigam Limited (BSNL), Mahanagar Telephone Nigam (MTNL), Telecommunications Consultants India Limited (TCIL), Telecom Regulatory Authority of India (TRAI), Telecom Disputes Settlement and Appellate Tribunal (TDSAT), Unique Identification Authority of India (UIDAI), Central Vigilance Commission (CVC), Metro Rail Corporations etc.

These connected Kolkata (then Calcutta) and Peshawar in the north; Agra, Mumbai (then Bombay) through Sindwa Ghats, and Chennai (then Madras) in the south; Ootacamund and Bangalore.

In 1865, the first Indo-European telegraph communication was effected and two years later a new cable was laid between India and Ceylon (Sri Lanka).

[5] On 28 January 1882, Major E. Baring, Member of the Governor General of India's Council declared open the Telephone Exchanges in Calcutta, Bombay and Madras.

The year also witnessed the opening of the first automatic exchange at Simla (Shimla) with a capacity of 700 lines and 400 actual connections.

In the 1980s, the first satellite earth station for domestic communications was set up at Secundrabad, the Troposcatter system link with the Soviet Union was inaugurated, the first SPC electronic digital telex exchange and the first SPC analogue electronic trunk automatic exchange were commissioned in Bombay, the Centre for Development of Telematics (C-DOT) was established, the first mobile telephone service and the first radio paging service were introduced in Delhi, Mahanagar Telephone Nigam Ltd. (MTNL) and Videsh Sanchar Nigam Ltd. (VSNL) were set up, and the international gateway packet switch system was commissioned in Bombay.

This service is primarily responsible for policy, technical, administrative and managerial functions of the government in the areas related to telecommunications.

After recruitment through Engineering Services Examination conducted by UPSC, the officers undergo a rigorous two-year probation course at National Telecommunication Institute for Policy Research Innovation and Training(www.ntiprit.gov.in) at Ghaziabad where ITS probationers are groomed as Future leaders to handle various techno-managerial matters in Government of India.

[7] As ITS Officers are backbone enablers of various digital technological developments in India, they are imparted latest training pertaining to various administrative and technical aspects.

The officers are also deputed for on job field training in various areas like Disaster Management, Coordination with states, telecom operations etc.

Member (Services), Digital Communications Commission (DCC) of India is cadre controlling authority of ITS, Group A.