Abstract: A method and system for directed call establishment to anchor selected cellular calls in a Voice over Internet Protocol (VoIP) or an IP Multi-Media Subsystem (IMS) network employs a mobile handset application client to interrupt selected cellular call initiations and request a directed call establishment number from a converged services node. A call placed to the directed call establishment number creates a call signaling path through the converged services node in the VoIP or IMS network, which can then exercise control over the call to provide enhanced call services. The converged services node completes a call connection to the original called number in a manner transparent to the user of the mobile handset.

Abstract: A method and system for directed call establishment to anchor selected cellular calls in a Voice over Internet Protocol (VoIP) or an IP Multi-Media Subsystem (IMS) network employs a mobile handset application client to interrupt selected cellular call initiations and request a directed call establishment number from a converged services node. A call placed to the directed call establishment number creates a call signaling path through the converged services node in the VoIP or IMS network, which can then exercise control over the call to provide enhanced call services. The converged services node completes a call connection to the original called number in a manner transparent to the user of the mobile handset.

Abstract: A system provides a service to mobile devices that permits the mobile devices to substantially avoid roaming charges while roaming in visited networks. A temporary subscriber identity (TSI) server receives a TSI request message from a TSI client operating on a roaming mobile device. If available, a temporary service identity is returned to the TSI client, which registers the mobile communications device with a specified service provider as a home subscriber using the temporary service identity.

Abstract: A method and system for joining independent but related communications sessions to form a communications connection uses a communications session join function to join independent communications sessions connected to first and second endpoints based on information contained in the respective independent first and second communications session requests. The communications session join function sends connected party information associated with the first endpoint towards the second endpoint and connected party information associated with the second endpoint towards the first endpoint to complete the communications connection.

Abstract: A system provides a service to mobile devices that permits the mobile devices to substantially avoid roaming charges while roaming in visited networks. A temporary subscriber identity (TSI) server receives a TSI request message from a TSI client operating on a roaming mobile device. If available, a temporary service identity is returned to the TSI client, which registers the mobile communications device with a specified service provider as a home subscriber using the temporary service identity.

Abstract: A method, apparatus and system for reconfiguring communications call paths enables more efficient use of communications network resources and enhanced service offerings. A plurality of feature control points (FCPs) located in a plurality of different types of communications carrier networks are controlled by a single call service node (CSN). The CSN receives a report from a FCP each time the FCP receives a call control signaling message. The CSN uses the reports to map the call path, so that when a connection change request is received, the CSN can select which of the FCPs to use to effect the requested change based on predetermined criteria.