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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.
2002-10-12