ces, networks, terminal operations and maintenance of these. One example is a global video conference system at an enterprise site. Another example is 'Call Centre' where calls from customers are directed to a specific call-centre answering and acting on behalf of the enterprise. In the ideal case the calling customer should feel that it is the addressed enterprise that is answering the call. 2.3.5 ENTERPRISE SEGMENTS In this book, three 'Enterprise segments' are defined below, primarily based on size, which is one of the key parameters that determine the type of service needs. The needs for external and internal communications and also administration and business processes are to a large extent size dependent. The large enterprise, counted in number of employ- ees, normally has a larger need for applications in order to maintain a complex network of customers, employees, local offices worldwide, subcontractors and SO on. However, within each segment there are considerable variations in the type of services used, com- munication intensity, complexity, and SO on depending on the type of business operation. End-User Needs and Demands A hightech company can be anticipated to have other needs than a commodity man- ufacturing company. It is also important to remember that a small company working for example with front-line technology and products might have a much bigger need of advanced multimedia communication and services than a big company depending on the type of business operation. As said before, all segmentations and characterization of the segments must by necessity be quite generalized. The three enterprise segments defined in this book are: 1. Small office/Home office (SOHO) 2. Small and medium enterprise (SME) 3. Corporate 2.4 BASIC NEEDS MODEL Needs by individual users, organizations and enterprises is a main point when discussing what type of telecom services are important to design and implement. There are basic needs that are common to parts of the society; some are even common to the whole society. Co