Controlling a call in a telecommunications network

摘要

Methods and devices for controlling a call in a telecommunications network are described. The telecommunications network comprises a service control entity (SCP204), a service switching entity (SSSF203) and a switching node (MSC205). The call is subject to a first service invoked for a first call party (CP201) and provided by the service control entity (SCP204), and to a second service invoked for a second call party (CP207) and provided by the switching node (MSC205). The service control entity (SCP204) performs the steps of receiving (239) a message comprising an indication of an invocation of the second service from the service switching entity (SSF203), selecting a procedure for handling the invocation of the second service based on a knowledge about the second service and a knowledge about the first service, and sending (240) an instruction to the service switching entity (SSF203) according to the procedure for handling the invocation of the second service.