Total Network Data System: Trunking System

Trunking Systems By P. V. BEZDEK* and J. P. COLLINS* (Manuscript received August 3, 1982) The Total Network Data System/Trunking ( T N D S / T K ) systems are those modules of T N D S that support the engineering and administration of the message trunk network. T N D S / T K consists of the Trunk Forecasting System (TFS), the Trunk Servicing System (TSS), and Common Update/Trunking (CU/TK). Using representative trunk group loads and switching system growth data as input, T F S forecasts trunk needs for five future years. T S S fine tunes the first year of the forecast by showing where to rearrange the network to meet c u r r e n t demand. And C U / T K supports T S S a n d T F S with a record base that contains a description of the network and user-stated parameters. We describe T N D S / T K from the standpoint of its environment, functions, system internals, and future direction. We also present a high-level view of its algorithms. For more detail, the reader is referred to the "Theoretical and Engineering Foundations" article and its references in this issue. I. THE CIRCUIT ADMINISTRATION CENTER 7.7 General The Total Network Data System/Trunking (TNDS/TK) systems support the activities of people in the Circuit Administration Centers (CACs). These are work centers in the Bell Operating Companies (BOCs) that are responsible for engineering and administering the * 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.