685, 642 Int. CLG06I 9/75 U.S.CL 340-I72.5 3I ( A program controlled telephone switching system is shown as an example of a ... are performed and a plurality of trouble interrupt levels (maintenance interrupt levels), which are employed to initiate ... The call processor comprises a program control which receives program instructions from a program store to control the ... r1. aiArr*a#39;tfa#39;. ~. A computer input system. Data from a plurality of input units is transmitted through a single time-sharedanbsp;...
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