stations are the interface between the wired and wireless parts of the network, and can have switching capabilities. OSS for Telecom Networks ATM nodes comprise the basic infrastructure of the broadband integrated serv- ices digital network (B-ISDN) core network. ATM nodes must support mobility serv- ices and also perform all the usual functions of ATM nodes in a land-based network. In W-ATM, information flows enter the network at the UNI and leave at the destina- tion UNI. Thus, the network is homogeneous and does not distinguish fixed from mobile users. In other mobile network architectures, the B-ISDN connection termi- nates at a base station within the network, thus drawing a distinction between fixed and mobile users. Mobile terminals being within the B-ISDN network leads to some network man- agement problems. In particular, the approach to mobility management is specific to W-ATM. Performance issues in W-ATM mobility management rests almost entirely on the problem of handover and these problems have not yet been convin- cingly solved. It is not certain whether W-ATM will have a significant role in future wireless networks. 3.5 Conclusion Standardisation efforts towards a unified framework for managing ATM networks have largely been limited either to general guidelines or specific areas of ATM man- agement (such as the UNI via the ILMI specification). Therefore, most vendors remain attached to traditional management methods such as SNMP and extend these to provide their own proprietary solution. As a result, the development of an integrated platform for managing a heterogeneous, multi-vendor network requires considerable implementation effort, usually building upon some generic commercial management platform. Web-based network management (WBM) is an increasingly viable alternative to the monolithic, integrated platform approach to managing ATM networks. Tech- nologies such as Java combined with distributed object technologies, such as CORBA, make it possible to develop distributed WBM applications that deal 