Total Network Data System: Theoretical and Engineering Foundations

The Total Network Data System (TNDS) is a coordinated family of computer-based systems that collect and process network measurements to aid the engineers, administrators, and managers of the Bell System network in efficiently meeting service objectives. In this paper we describe these service objectives, the traffic measurements used to monitor and design the network, and the theories underlying the use of these measurements in the various TNDS systems. It is important to realize that, as a result of the continuing changes in the switching systems and methods of routing traffic in the Bell * Bell Laboratories. °Copyright 1983, American Telephone & Telegraph Company. Photo reproduction for noncommercial use is permitted without payment of royalty provided that each reproduction is done without alteration and that the Journal reference and copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free by computer-based and other information-service systems without further permission. Permission to reproduce or republish any other portion of this paper must be obtained from the Editor.