Invoked by the Communications Provider that owns the line on which the test will be conducted and provided with a valid Service ID, the Manage Line Test and Diagnostics Dialogue Service returns information regarding the operational status of the service based on the results of a real-time test of the physical characteristics of the associated circuit. Invocation returns a high-level summary of the test results and a unique test reference. The Test Reference is a pointer to a set of retained parametric test results and may be used by the CP in support of a subsequent Fault Report. Test results are presented in a CP-friendly form and include where required an explicit indication of the need for an Appointment or expectation of a CP-generated Fault Report. The Care Level associated with the Service ID is returned for use in any subsequent appointment. The Friendly Message and its associated code are mapped from the MFL, Test Outcome and Diagnostic Code/Text response provided by GTC.