Automatic Intercept System: Administering the Intercept Data Base

Administering the Intercept Data Base By J. H. CARRAN, K. E. GREISEN, W. G. HALL, and D. J. WELLS (Manuscript received October 5, 1971) An Automatic Intercept System data base of up to a half-million changed or disconnected telephone numbers is updated, corrected, verified, abstracted, restructured, and restored through the actions of a collection of function-oriented subprograms. These subprograms run in the base-level main program loop under their own monitor which also controls interruptlevel accesses to the asychronous disc memory. The monitor together with the set of subprograms provides a file administration capability which responds to both machine stimuli, such as timed entries or trouble indications, and human requests initiated from teletypewriters. I. INTRODUCTION The Automatic Intercept System ( A I S ) assembles machine announcements for calls to telephone numbers which have been changed or disconnected. Such calls are switched to intercept trunks in many local offices connected to one Automatic Intercept Center ( A I C ) . The dialed numbers are transmitted automatically to the A I C by local offices equipped to do so or by operators when local offices are not so equipped. The A I S also provides special handling for calls to numbers which have never been equipped and for calls to lines on which a trouble condition has been marked at the local office. 1 The principal data base, containing as many as a half-million directory numbers, is stored in duplicated disc memory units.2 Clerical personnel keep it current with additions, corrections, and deletions of numbers on intercept in all connecting offices.