Method of error detection in program controlled telecommunication exchange systems

Abstract

Abstract A method is described for accomplishing the diagnosis of errors in modular constructed, program controlled data exchange systems. The method contemplates the use of a specific program for error diagnosis. Redundance of the system is increased when several operating units in the system operate together in a cyclic fashion with central memories. When a particular unit of the system is recognized as malfunctioning, it is placed in a diagnosis state, and during the continuance of this state, the malfunctioning unit is active only for special test processes run under the control of the diagnostic program utilizing properly functioning units in the system. In carrying out the dianostic program, the properly functioning units are placed in the diagnostic state either constantly or at least for the duration of an operating cycle, as needed. A central sequence demand control, which receives, assigns and selects sequence requirements sent by the units of the system, is placed in a diagnostic state for running the diagnostic program in conjunction with the malfunctioning system unit now placed in the diagnosis state, along with a properly functioning program control unit for controlling the sequence and a properly functioning storage element. The sequence demand control operates in such a manner during the diagnosis state such that only particular cycle-related sequence demands of those units which are at the time in the diagnosis state are considered.

Inventors

• 👤 J Huber
• 👤 U Lenz

Bibliographic Details