Abstract: Method for connecting of AGW terminations and PSTN terminations using a telephone exchange (EX) and a media gateway controller (MGC), and gateways (AGW, TGW). An extend mechanism for providing of advanced call services is executed comprising the steps of detecting call conditions for applying the extend mechanism, inserting of a gateway (eTGW) for providing advanced call services, in a bearer connection of the involved terminations (T1, T2, T3, T4), wherein the gateway is connected with a port of the exchange (EX), routing the bearer to a digital switching device (ACSF) of the exchange (EX) via the inserted gateway (eTGW) and providing the advance call service. A media gateway controller (MGC) and a exchange (EX) for executing the method comprises components for controlling the inserting and removing of said extend gateway (eTGW) and providing the advanced call service to the subscriber.

Abstract: The present invention concerns a method, a switching center, a converting node, and a service control point for the transmission of service signaling messages, with service signaling messages being transmitted in sequences through a signaling network between switching centers (SW1, SW2, SW3, SW6). The service signaling messages are each directed from an originating switching center to a destination switching center using a destination code and a converting node (CP) if necessary determines a ported subscriber code assigned to the subscriber code. It is proposed that the originating switching center determine a ported subscriber code and enter it into the those signaling messages as destination code which the originating switching center sends within a sequence of signaling messages following a first signaling message.