The document provides an overview of the history and development of telecommunication in India. Some key points:
1) India has the second largest number of wireless connections in the world after China, with over 800 million subscribers projected to reach 1.2 billion by 2013.
2) The first experimental electric telegraph in India was established in 1850 between Calcutta and Diamond Harbour. The telegraph network then expanded across India.
3) The Department of Telecom (DoT) was established in 1975 and managed all telecom services until the 1990s when the sector was opened to private investment.
4) Wireless technologies like pagers and mobile phones were launched commercially in India in the 1990s. India