Private networks: evolution to value-added applications

Private networks for voice and data are becoming increasingly sophisticated. Using standard ISDN communication inter faces, enhanced signaling and increased processor/switch interactions, private networks are evolving to support a variety of value-added applications. This paper reviews the present capabilities of PBX-based private networks, describes important developments in the areas of PBX and related ISDN network functionality, and illustrates how these developments will be applied to private networks in the future to allow increasingly useful business applications.