This Recommendation is intended to provide an overview of Telecommunications Management Network (TMN) Management Services and Telecommunications Managed Areas, It provides the framework for the specification of protocols, messages, management information, etc. for TMN interfaces. The TMN Management Services are described from the TMN users' perspective and are independent of the protocols, messages and information models chosen. They will therefore assist in the smooth transition from a non-TMN to a TMN environment. It should be noted that flexibility will be required in the definition of TMN Management Services to enable additional requirements to be accommodated as they are identified. To avoid discrepancies and duplications, this Recommendation establishes the structuring principles (e.g. numbering, naming, etc.) for the M.3200-Series of Recommendations.