Programmed diagnostic equipment for a communication switching system

Claim 1

IN AN ELECTRONIC SYSTEM HAVING A PLURALITY OF DIFFERENT CIRCUIT UNITS OPERATING IN PREDETERMINED PROGRAMS INDIVIDUALLY AND IN COOPERATION WITH EACH OTHER, WHEREIN EACH CIRCUIT UNIT INCLUDES A PROGRAM FUNCTION TIMING MEANS OPERATED TO INDICATE A FAILURE TO COMPLETE SAID PREDETERMINED PROGRAM: A FAULT INDICATOR FOR USE THEREWITH COMPRISING; ASSOCIATING MEANS OPERATED UPON A FAILURE INDICATION FROM A PARTICULAR CIRCUIT UNIT FOR TEMPORARILY ASSOCIATING THEREWITH, PROCESS CONTROL MEANS, SAID ASSOCIATING MEANS INCLUDING MEANS OPERATED UPON ASSOCIATING WITH A CIRCUIT UNIT TO INDICATE TO SAID PROCESS CONTROL THE TYPE OF UNIT ASSOCIATED THEREWITH, TEST PROGRAM STORAGE MEANS COMPRISING A MAGNETIC DRUM, MEANS IN SAID PROCESS CONTROL OPERATED IN RESPONSE TO SAID TYPE INDICATION TO INTERROGATE SAID STORAGE MEANS FOR AN APPROPRIATE TEST PROGRAM, A COMMON TEST ACCESS PATH CONNECTABLE TO EACH CIRCUIT UNIT, CONNECTING MEANS IN EACH CIRCUIT UNIT OPERABLE TO CONNECT SAID CIRCUIT UNIT TO SAID TEST ACCESS PATH, FIRST CONTROL MEANS IN SAID PROCESS CONTROL MEANS OPERATED UPON SAID ASSOCIATING MEANS ASSOCIATING WITH A CIRCUIT UNIT TO OPERATE SAID PARTICULAR CONNECTING MEANS, TRANSFER MEANS IN SAID CONTROL MEANS THEREAFTER OPERATED TO APPLY SAID TEST PROGRAM TO SAID CIRCUIT UNIT, COINCIDENCE MEANS IN SAID CONTROL MEANS, SECOND CONTROL MEANS IN SAID PROCESS CONTROL MEANS OPERATED AFTER APPLICATION OF SAID TEST PROGRAM TO SAID CIRCUIT UNIT TO APPLY SAID CIRCUIT UNIT OUTPUT AND PART OF SAID STORAGE MEANS PROGRAM TO SAID COINCIDENCE MEANS, AND OTHER MEANS IN SAID CONTROL CIRCUIT OPERATED UPON COINCIDENCE OF SAID TWO INPUTS TO SAID COINCIDENCE MEANS TO INDICATE THE FAULTY CONDITION.