Employees usually need a number of communications and IT services during the working day, whether they are mobile or not. To provide the right tools for every job, one needs to understand the individual service needs of each employee. It is helpful to divide communication and IT services into Person-to-Person and Person-to-System services. Person-to-Person services include both voice and text based communication, whereas Person-to-System services include services such as phonebook, calendar, general office applications, connectivity to enterprise intranet and various enterprise specific applications such as Customer Relations Management (CRM) applications.