those with little desired call content are not able to use up all of the memory capacity as a result saved undesired content is superseded by desired content that is to be saved if the invention is developed further in such a way that the first subscriber terminal includes information about a third validity period for a period of time during which leaving a voice message is possible as the first item of information the subscriber is able to determine times during which calls with little desired content are for example rerouted to a voice recorder to leave a message it is also advantageous if the first subscriber terminal includes a sequence of instructions executable on the first network node as the first item of information this makes it possible for any terminals to be put in a position of carrying out the actions desired by the subscriber which are supposed to occur as a function of the first item of information individualization is therefore possible as well as a guarantee that the desired result is achieved by the resources available in the network embodiments are preferably further developed in such a way that when forming the data element the first network node and or the second subscriber terminal adds a first address to the first item of information addressing the second subscriber terminal for receipt of the first item of information this makes it possible to influence whether a caller who is supposed to be put through is also the.