a phone the application could be controlled by use of dual tone multifrequency dtmf signaling the applications could be equally controlled by use of interactive voice response ivr in telephony the possibility to develop an application once and make it available through telephone umts videophones and iptv systems is one of the advantages of this interactive application architecture for existing iptv systems in the second embodiment of the invention the interactive session is dynamically established in this embodiment the television 1 of the end user is already switched on before the connection setup the television 1 is arranged so that it is capable of dynamically presenting u201c pop up u201d type notifications to the end user now the aauim 11 can take advantage of this feature to launch an interactive session with the end user in the second embodiment of the invention an interactive video conferencing session is launched with the television 1 through the set top box 3 the end user has access to a voip service where the voip system hosted by the service provider provides the following facilities supervision of call events through a computer telephony interface cti or equivalent interface for instance in public networks supervision of calls can be performed by an intelligent network in application or by an ip multimedia subsystem ims application server in an ims network in a typical situation the supervision of calls may be derived from the existing colored ring back tone rbt service which is triggered for any incoming call to the subscriber colored ring back tone service is provided by several vendors for instance fundial u2122 provided by comverse inc of 100 quannapowitt parkway wakefield mass 01880 www comverse com the incoming call event provides a special parameter for video calls i e callers.