economical understanding is crucial for successful service development and business. The problem in real life is indeed to limit the area. What is described in this chapter is more a kind of ideal future situation than a descrip- tion of what has yet been implemented in real networks. 9.2 CONNECTION TO PRECEDING CHAPTERS An introduction to the service network area is found in Chapter 3, see for example Section 3.11. The area is also treated in Chapter 8, section 8.7. This chapter develops the subject further. Other network (CPN, Terminal if any) Content Content Service network Applications control applications Applications Service enablers Service enablers Network control and intelligence Access Core connectivity User information flow Figure 9.1 Position of the service network in the reference model Understanding Changing Telecommunications - Building a Successful Telecom Business. Edited by A. Olsson © 2004 John Wiley & Sons, Ltd ISBN: 0-470-86851-1 Understanding Changing Telecommunications - Building a Successful Telecom Business This chapter: Revenue ! Service plan (business based) Packet production process handling control Service layer resources interconnect (VAS, IN) numbering routi, Appl. adapt Chapter logic Access Produced packet Find and connect with QoS, security! Economy FP Signal- Access ling, incl. Access Development track service HTTP, SMTP charging lay dependent conn. control (mutual dependence security layers vs service plan) Protocol store Save bandwidth! (CAPEX) Billing Process example at end of chapter 8 Brief example at end of chapter 7 (Figure 7.25, 7.27) Figure 9.2 A process view that was introduced in Chapter 8 - FPs involved in traffic cases are indicated Regarding the technical side, the chapter pursues the successive communication system build-up in Chapters 5, 6, 7 and 8. The parent service layer has been treated in previous chapters. Let us use the process view of Figure 9.2 as a bridge between technique preceding chapters and this one. Pedagogically, a process view like this one can h