| 摘要 |
<p>In a communication switching system including a control unit for establishing connections through a switching matrix, the connections being established during a cycle of the control unit and the cycle being divided into a number of sequence states during which established logical functions are to be accomplished before exiting to the next sequence state, an arrangement for making the sequencing of the control unit permissive instead of absolutely controlled by a timer set for worst case operation. With the disclosed arrangement, exit to the next sequence state is permitted as soon as all of the logical functions are accomplished. The control unit also can exit to the next sequence state if the worst case operating time is exceeded, and with a peg count of the occurrence being made. On genuine trouble conditions, the control unit is not permitted to exit to the next sequence state, a trouble second is printed out, and the sequence state counter is reset to its idle state, with the connection being dropped.</p> |
