A subscriber unit in a telephone network may receive personalized services from a network by providing personalized software to the network. The subscriber unit may prepare or have prepared particular personal agent software that implements certain enhanced functions designed by or for the subscriber. That software may then be uploaded to the network. Upon the occurrence of a certain event, the personal agent software is executed by the network to provide the personalized service desired by the subscriber. In some cases, the network may afford a variety of primitives which may implement basic functions that may be called by the personal agent software.