Disclosed embodiments allow telephony services of different types to be provided by a telephone company at a service platform for telephone calls received at a local telephone exchange belonging to the telephone company, but which does not itself support services those different types of services. Additional embodiments allow for disabling a subscriber-configurability feature for a service of a first service type on the local exchange so as to prevent or inhibit a subscriber from configuring a setting which may interfere with services provided on the service platform.