In the 4th Framework of European research programme, telecommunications sector (ACTS) has played an important role. Within the framework under ACTS (Advanced Communications Technologies and Services), Domain 5 is dedicated to "Intelligence in Services and Networks (IS&N)" area and has projects that deal with service architecture, service platforms, service creation, communications management, electronic brokerage, mobility, security, agent technology and applications. Many of the pfojects cover more than one of these aspects. This text addresses the issues in particular order and provides the results of IS&N projects addressing those issues in a synthesized manner, so that the reader can get insights into the European projects contribution towards the telecommunications software industry. Thus it provides the reader with a comprehensive overview of IS&N issues