Bharti Airtel Limited (previously called Bharti Tele-Ventures) is one of India's leading private sector providers of telecommunications services, delivering mobile, broadband and telephony, and enterprise services to more than 19.74 million customers, including more than 18.45 million GSM mobile subscribers. Bharti has a firm commitment to growth and, through a highly cost-effective outsourcing business model, aims to differentiate itself in India's highly competitive communications environment by ensuring customer delight through personalized customer service. The Nortel solution includes: a 24x7 "Virtual storefront" voice portal based on the Nortel Interactive Voice Response (IVR) solution; and a Network Operations Center (NOC) in New Delhi to provide network design, integration, support and maintenance services for Bharti's contact center architecture.