The invention relates to a method for emitting signal when a communication participant is not available on a subscriber station (SUB2) of a first partial network (NET1), especially a fixed network, associated with a communication network, once a call has arrived that was destined for the respective subscriber station, to a defined station of a second partial network (NET2), especially Internet, associated with the mentioned communication network which is linked with the first partial network (NET1) via at least one transition device (GW), and wherein communication links from and to a mobile radio device (MOF) associated with the respective communication participant can be established as radio links. According to the invention, a short message signal is transmitted to the defined station of the respective second partial network (NET2), via call redirection from the mentioned subscriber station (SUB2) to a server (SVR) associated with the second partial network (NET2) and by means of an information service defined in said server (SVR), said message comprising at least the subscriber number of the calling subscriber station (SUB1).