A top-down operations model for ADSL and ATM based access networks

Existing information-modeling techniques are based on a bottom-up approach and often deal with a single technology, however, they have failed to yield an adequate operation model to support multi-technology-based communications networks in the real world. As ATM technology is introduced into interoffice backbone networks and xDSL-based access networks, it becomes increasingly difficult to manage these coexisting, multi-technology-based networks without a better NM (network management) information modeling technique. The standard telecommunications management network model divides network management functions into five management layers and five function areas. It separates service-oriented management functions from technological dependency and implementation specifics. This separation provides the necessary freedom for new technologies and innovative ideas to be introduced rapidly for new services. This paper suggests using a top-down approach. By using both an abstractive service profile and a detailed, corresponding line profile we could link upper-layer service functions and low-layer detailed attributes to each access line together harmoniously. With this approach operations interfaces may be simplified and an open interface between OSS (operations support system) and the EMS (element management system) may also become feasible.