Abstract: A method of controlling subscriber access to SIP-based services facilitated by an IP Multimedia Subsystem. The method comprises defining at a Serving Call Session Control Function node at least one default screening trigger, and downloading from a Home Subscriber Subsystem, specific screening triggers allocated to at least certain subscribers. At the Serving Call Session Control Function node, at least certain SIP messages originating at subscriber terminals are intercepted and, for each intercepted message and in the absence of a matching specific screening trigger, the default trigger is activated so as to cause the SIP message to be forwarded to a specific SIP application service.

Abstract: The invention relates to a method and a node at an entry point of an IP Multimedia Subsystem (IMS) for adapting a Session Initiation Protocol (SIP) message. The invention also relates to an IMS comprising the node and executing the method. The node comprises a port for receiving the SIP message from a client and a processor for executing a first function for detecting a client type, using information from the SIP message and for executing a second function for adapting the SIP message for the IMS, by adding an end point capability, such as feature tags and option tags, to the SIP message according to rules relative to the client type.

Abstract: Methods and systems for interworking in messaging systems are described. An event store can be accessible by different dispatchers associated with different message servers. The dispatchers may be co-located with the event store or non co-located with the event store.

Abstract: A method of controlling subscriber access to SIP-based services facilitated by an IP Multimedia Subsystem. The method comprises defining at a Serving Call Session Control Function node at least one default screening trigger, and downloading from a Home Subscriber Subsystem, specific screening triggers allocated to at least certain subscribers. At the Serving Call Session Control Function node, at least certain SIP messages originating at subscriber terminals are intercepted and, for each intercepted message and in the absence of a matching specific screening trigger, the default trigger is activated so as to cause the SIP message to be forwarded to a specific SIP application service.

Abstract: A method and Session Initiation Protocol (SIP) application server, the server comprising a SIP container supporting SIP communications and a SIP service running on the SIP server. When an SIP message is received at a SIP application server, the SIP container detects the message is destined to the local SIP service and determines which end-point capabilities are included in the SIP message, the end-point capabilities being, for example, indicative of the requirements for the proper processing of the message. The SIP container further determines whether or not end-point capabilities of the SIP service match the ones included in the SIP message, and upon determining that a match exist, invokes the SIP service and relays the message to the service. Otherwise, if a match is not detected, the SIP container does not invoke the SIP service, but rather issues an error message, or further relays the SIP message to another destination.

Abstract: A method and Session Initiation Protocol (SIP) application server for efficiently creating a SIP message, such as a SIP request or response message. A new service is installed in the server, and a service engine of the server acquires information regarding end-point capabilities (e.g. option tags or feature tags) associated with the service, possibly from a deployment descriptor file of the SIP service. During operation, a SIP message is created by the service, and sent to the engine, which detects if end-point capabilities should be added to the message. If so,the engine includes in the appropriate headers of the SIP message the proper end-point capabilities information, which may be zero, one or more option tags, and/or zero, one or more feature tags.