Chennai, Oct. 4 :    Chennai, Oct. 4:  Bharti Enterprises Ltd, a leading private telecom company which is building a country-wide fibre-optic cable network plans to cover the eastern region in its next phase, Sunil Bharti Mittal, chairman and managing director of the company, announced here today. Bharti launched its AirTel brand of cellular services here today and the chairman said the company is planning to make Chennai the focal point of its telecom operations. AirTel's entry into Chennai follows Bharti's recent acquisition of a majority stake of 89.5 per cent in Skycell Communications, one of the two existing cellular licensees in the city. Skycell Communications Ltd has also been rechristened as Bharti Mobinet Ltd. 'We have already invested Rs 100 crore for the Chennai operations and another Rs 100 crore will be pumped in the coming year to provide world class cellular services in Chennai', Mittal said. He said Bharti had chosen Chennai as the hub for its mobile, fixed line and undersea cable operations and added that the company's submarine cable link between Chennai and Singapore was expected to become commercially operational in the first quarter of next year opening up unlimited global communication access for Indian customers.