Abstract: The present invention proposes a solution for providing IMS services to users having circuit-switched controlled terminal being not adapted to provide IMS services to the users. In particular, it is proposed, in order to allow IMS to take the full call and service control, to place a user agent being responsible for the user ported to the IMS in a new node type called Mobile Access Gateway Control Function (MAGCF). This new node combines the logical functionality of a cellular switching center and the logical functionality of IMS. Further it is proposed to enhance a user's register, like HLR, to provide also information about the availability of a MAGCF node and about whether a particular user is enabled to use the MAGCF functionality.

Abstract: A system and method for allowing IMS subscribers to perform service and session control of IMS services via a CS access. A User Equipment, UE, that is registered with an IMS network but is not in a position to access the IMS network using IP can still access the IMS network and control the IMS sessions by sending Unstructured Supplementary Service Data, USSD, messages via an available Circuit Switched network that is connected to the IMS network.

Abstract: The invention relates to methods and devices for enabling the handling of terminating speech calls to a dual mode user equipment by using a further access network for transmitting said data.

Abstract: The invention is related to a method for transmitting data in a telecommunications network and a device, e.g. a network node, utilising that method, where said data transfer requires the application of algorithms for coding and/or decoding (“codec”) on said data, where at least one of said network nodes provides a list (25) of available codecs and transmits it to a further network node, where said further network node chooses from the received list (25) and from a corresponding set of codecs available to the further network node a combination of codecs to be used when transferring said data, and where the received list (25) not only comprises direct codecs (28) but transcoding codecs (29), i.e. codecs requiring transcoding, as well.

Abstract: The invention relates to a method for operating a switching node of a communications network, wherein the communications network comprises a layered architectural environment and a non-layered achitectural environment. The switching node provides processing capabilities for the processing of communications services both within the layered and the non-layered architectural environment The method comprises the steps of receiving a communication service request, determining according to at least one predetermined rule as an operation mode, whether the switching node is going to act for a processing of the requested communication service as a switching node of the layered architectural environment or as a switching node of the non-layered architectural environment, and processing the requested communications service in accordance with the determined operation mode of the switching node.

Abstract: The invention introduces a method for transmitting data packets of a call in a communication network, an edge node, a communication network and a computer program for performing said method. In the invented method, packets are sent between two edge nodes, wherein a first edge node removes redundant headers and replaces them by a new header, defined for the transmission of data packets between the edge nodes. Information that is necessary for the rebuilding of the removed headers is sent on a different path to the edge nodes, once, and stored in said edge nodes.