t). 2. Two seconds to access personalized portal. 3. Three clicks to desired content on personalized portal. 9.7.2 SINGLE SIGN ON It is tedious to log in to many different services. Single sign on enables a single secure log-on. Understanding Changing Telecommunications - Building a Successful Telecom Business Single sign on has evolved as a cost-saving solution to minimize support calls, and at the same time simplifies the administrative process of authentication and authorization. For a large enterprise, as the number of passwords each user is required to maintain increases, SO do the support calls With each of these calls having an associated operational cost of $32 (according to the Gartner Group), and the increasing number of applications in use, businesses cannot afford the productivity lost through continuous password resets. 9.7.3 MANAGEMENT OF PERSONAL SERVICES A service network offers control of network resources to the applications. Such a control implies also a possibility to receive personalized services, provided the user preferences are known and paid for. From an end-user point of view, the service network owner becomes a single point of contact for service provisioning and matters related to a user's personal service environ- ment. The main responsibility of personal service environment management is to handle end- user service provisioning and service management. It is an end-user's contact point for managing his/her personal service environment. As such, it is not coupled to a spe- cific access type or underlying core network, and is reachable via several accesses and core networks. 9.7.4 AVAILABILITY OF SERVICES This is a prioritized area for OMA. 'No matter what device I have, no matter what service I want, no matter what carrier or network I'm using, I can communicate and exchange information'. The OMA solution is interoperability across technologies, products, services and value chains. 9.7.5 ENTERPRISE B2B COMMUNICATION AND WEB SERVICES According to common business language, CBL (a framewo