The scope of this Recommendation is to provide an information model which covers the management aspects of the traffic management service functions in an exchange. The scope is limited only to circuit switched networks using hierarchical routing. This Recommendation focuses on the Stage 2 and Stage 3 description of the Q3 interface between Network Elements (NEs) and Operations Systems (OSs). The Stage 1 description is provided in E.410-Series Recommendations and in Recommendation E.502.