Everybody wants more from telecommunications. Service and equipment providers are queuing to meet these needs. This book is a result of ISSLS 91, a forum for reconciling supply and demand. The overall theme of the conference was Moving to the User, with sub-themes of Communication in Business, Secure and Dependable Services, Operations and Management, and Access Architectures and Technologies. ISSLS has for many years been dominated by the impact of network digitalization as it spreads into the local access network, particularly in the form of ISDN. The technology in this area has been maturing and the new challenge is to identify the ways digitalization can be exploited, both by the users for new applications, and by the network provider for making networks more manageable, resilient, flexible and cost-effective. Radio coupled with digital processing and control is now a major force, giving the opportunity for wireless operation on scales varying between the cordless telephone and the rapid provision of services in rural areas. For many purposes, the major challenge of radio lies in living with its limited bandwidth.
