Abstract: A method and arrangement for providing information to a client from a client access network regarding a requested set of users, at least some of which are connected to other access networks. In response to a client subscription request, the client access network establishes a network subscription with the other access networks. Information updates regarding users in the set are then continuously received and stored in a database of the client access network, whenever the users change their state. In response to a subsequent request for user information from the client, corresponding stored user information is retrieved from the database and sent in a notification to the client.

Abstract: A method is disclosed for use in a telecommunications network that makes use of the Session Initiation Protocol (SIP). The method comprises receiving node status information in a SIP Request whose Request Uniform Resource Identifier, or Request-URI, identifies the SIP Request as comprising node status information and also identifies the intended recipients of the node status information.

Abstract: A method and arrangement for handling a service request in a session control unit in a multimedia network. Upon receiving the service request from a user equipment, the session control unit checks a service profile associated with a user-identity of the service request in order to find an application server to which the service request is to be routed. Prior to routing the service request, an ensuring entity ensures the service request will include a primary user-identity. In the application server, the primary user-identity is used to find stored data, which is necessary for executing the requested service.

Abstract: There is described a system which, in a voice over IP radiotelecommunications system, allows a mobile station to make an emergency call, even though other calls would not be allowed at that time.