An implementation architecture for a telecommunications management network (TMN) suitable for the management of integrated broadband communications in the CEC RACE programme is described. The architecture is intended to support the future implementation of TMN systems within Europe and elsewhere. Having outlined some of the motivations for the development of a TMN architecture, the paper introduces the various functions associated with a TMN. An overview is given of the functional and physical views of the TMN. One of the major components of any network management system is the management information base. This is described in some detail because of its central role in the architecture. Finally a list of some of the open issues still remaining concludes the paper.