UMTS Open Service Architecture

One of the important features of UMTS is Open Service Architecture (OSA). OSA is a framework which aims at building various kinds of services on the top of UMTS core Network. The OSA will provide APIs to access the network functions like authentication and authorization of the user. The APIs are guaranteed to be secure, independent of vendor specific solutions and also independent of programming language by use of Object Oriented techniques like CORBA, SOAP etc. Various services like VPN, conferencing and many more unknown services can be implemented with the help of these APIs.