es. In line with Figure 3.25 the basic model must be complemented with a server part for content provision and similar server tasks. It could also be another peer or a mailbox according to Figure 3.24. The convergence of telecom and datacom leads (in the optimal solution) to the creation of one single network replacing all vertical networks after a long transitional period. The convergence with the media industry is shown by means of content provision and additional functional area on top of the network. The new model represents a person-to- content relationship, as opposed to the previous person-to-person model. A service layer adds to the fundamental plans. See Figure 3.26. In order to meet the user demands many devices and servers have been developed. Application developers design applications based on user needs and the possibilities offered by the network. The FPs shown in Figures 3.2 and 3.21 are now insufficient and a number of service- oriented plans are added. The service, security and QoS plans embrace functions in all layers (e.g. security in numbering and routing, QoS over the air). QoS and security can be seen as attributes to the service. In fact, certain services, security and QoS requirements have existed before. One could for example argue that ordinary voice and associated supplementary and/or intelligent network services have been around for a long time. Security may have been represented Understanding Changing Telecommunications - Building a Successful Telecom Business User data FAB = Actor-user Charges User segments Content interface, with Life-style analysis provision fulfilment, Youth, or content assurance and Roles (Billing) life enhancement, reception billing executives etc. (peer) Services, Qos, Security SM = Service management Application logic, Resources (API) Tuning NM = Network ROCE etc. Layering FP impl management Stable economic Network service interfaces Processing Platform Fundamental service technical plans Network interfaces interfaces Investments Distribution Figure 3.25 A ser