interface to the end users, where they can administrate their services. This is done through the portal solution, which is one of the building blocks in personal service environment management (PSEM). Thirdly, there is one interface to the applications, which is also the interface for the application developers. This is taken care of by the applications/services interface, which is also hosting a operator specific developer zone solution. And the fourth interface is to operation and management (the operators' interface). This is done through the service network operation system. The service network embraces network internal transport via an IP network. There is also a logical interface to other networks. See Figure 9.11. In the larger perspective the service network is located on top of the control network, but the application could also be remote and connected to the service platform by means of the Internet. Also, the connection from the service network to the connectivity network can be shown in a similar way as in Figure 9.11. See the bearer 'pipes' in Figure 9.12, which shows a distant application, supported by home service network resource management and application support. For an overview see Figure 9.13. Personal services environment management (CPE) Service network management (CME) Application(s) IP network server Common directory (PSTN, ISDN) Enablers Internet Figure 9.11 Major functions in a service network Understanding Changing Telecommunications - Building a Successful Telecom Business Remote application Application support servers Open API Management Bearers system Internet ISP PoP Access Figure 9.12 The service network cooperates with, and supports, remote applications Business Application servers Applications Service support and applications: Appl. Appl. network systems/ Partners server server Appl. Appl. Appl. server server management 3rd parties server Monitoring manager IP-Infrastructure/ backbone Integration PSE Management manager Billing Portal Directory engine Configuration system user pro