The telecom sector has seen much change during the past two decades. At first, it was the opening up of the equipment manufacturing sector, followed by the corporatisation of the government owned entities, Videsh Sanchar Nigam Limited (VSNL) and Mahanagar Telephone Nigam Limited (MTNL). Subsequently, the sector was opened for private participation in basic, cellular and other value added services. The most recent liberalization moves have been the corporatization of the Department of Telecom into Bharat Sanchar Nigam Limited (BSNL) and the privatisation of VSNL.