2. Service opportunities
The IMS domain offers a multimedia support network for the development of numerous services inherited from circuit telephony, as well as new Internet-related services.
The architecture and general principles are described below, along with a few examples of services (it being understood that the user can access a service in client/server mode with an application server, or in client/client mode with another IMS user).
2.1 Architecture and principles for implementing services
IMS services are executed on application servers, which may belong to the nominal operator's network (the user's IMS subscription) or to an external network (the network visited in a roaming situation, or a third-party network). Application servers are located...
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