Abstract: A communication network management system for integrating two network management systems working together in a client/server manner to provide an integrated view of a multi-layer, multi-technology network. The invention provides a novel interface module that permits a network management system to represent different logical levels in a communication system. For instance, one logical level of the communication system could be the transport network while another logical level is the data network. The main advantages of the invention is that it provides to a network administrator a system which permits management of two levels of a networks a data network to tell how the two networks are integrated and what the entire topology is, and therefore renders it possible to manage both networks through the same system.