Enterprise IP Goes Mobile. The use of mobile devices by senior management and sales staff will be nearly universal in three years, according to a global survey of 395 senior executives conducted by the Economist Intelligence Unit for AT&T. Mobile usage also will escalate among customer service, IT, marketing and field workers. Many will be connected to converged IP networks. Employees can continue to work from almost anywhere, and can connect on the move, thanks to VoIP and IP VPNs. Companies are struggling to integrate mobile applications with existing IT infrastructure. Security also needs to be tightened, and informal knowledge sharing between remote workers must be maintained as employees meet face to face.