A telephone system provides subscribers with access to a service provider's platform logic and data implemented in any runtime environment. In one embodiment, the service logic is embodied in Java applets and Java beans in a JAVA virtual machine for subscriber personalizing and modifying the service logic. The provider provides the subscriber a tool kit or access to a support server for writing service logic modifications as JAVA beans. The service logic modification is achieved in a process in which the service requirements and objectives are set. The service specifications are designed, implemented, tested, and rolled out. Initial service provisioning and support is provided a subscriber, service modification by the subscriber is made to subscriber data provisioning and subscriber service logic provisions. A modified service logic is locally tested by the subscriber, followed by remote testing of the modification on the service provider's premises. The service provider provisions and then supports the modified service logic.