Abstract: A system and method for testing subscriber's services and sectionalizing service trouble in distributed networks, such as Advanced Intelligent Network (AIN), includes a test call set-up component, which enables a tester to set-up a test call. A test call can be set up by the tester by interactively defining the test environment and other information to emulate a call from a subscriber's communication line. A test call can also be set-up by marking triggers in the subscriber's trigger criteria and by marking the subscriber's subscription data at the service control point/adjunct. The test call set-up component also establishes a maintenance parameter which defines the environment in which a test call is to be processed and the data to be collected, if any, during the test call.