WLAN into one physical device. In addition to the requirement of having two radio interfaces available, the user subscriber information, which is stored on the USIM, needs to be accessible from both radio interfaces. If there are different deployment alternatives for the two radio interfaces in the marketplace, then naturally there will be different alternatives for providing access to the USIM, based on a single USIM or based on two USIMs. Telecom Management - Operations 'We have to learn to manage the disorder'. . ('Debemos aprender a manejar el desorden'.) Juan Perón 16.1 INTRODUCTION Besides covering telecom management operations at an overview level, this chapter sum- marizes the structure of the book by means of plenty of references to preceding chapters. Customer network Management interworking management Customer management IT & system Customer network management management Customer management IT & system management Network operation Network operation Service provisioning Service warehuusing warehousing provisioning Service layer Control layer Access Core connectivity Figure 16.1 Position of telecom management - Operations Understanding Changing Telecommunications - Building a Successful Telecom Business, by A. Olsson C 2003 Ericsson och Student litteratur. ISBN: 0-470-86851-1 Understanding Changing Telecommunications - Building a Successful Telecom Business The aim is to take a final step in acquiring a holistic and consistent view of the subject. Unfortunately, the telecom management area often gets less attention than it deserves. A reason for a holistic approach is that the extensively segmented network demands a subsequent integration to produce income. End users and telecom businesses need single, predictable and reliable network behaviour. An important requirement is to inte- grate segment behaviour into an end-to-end behaviour. Telecom management fulfils the wanted role as a network integrator, laid down in fundamental technical plans or sim- ilar rules. Telecom management allows configuration of 