| 摘要 |
PURPOSE:To elevate test efficiency and service to subscribers, by obtaining a necessary and sufficient subscriber line status display in the test board, by taking proper treatment mainly onto software. CONSTITUTION:A CPU CC starts a peripheral equipment PM through a date channel DCH, receives a stored subscriber data, and discriminates whether a called subscriber related to a telephone set SUB is an incoming controlled subscriber or not. When analysis of said subscriber data is finished, the CPU CC starts a main memory device MM, checks a line memory, and discriminates whether this called subscriber is busy or not. Also, it discriminates whether this called subscriber is busy or not by searching a lockout register. After that, when this subscriber line is free, whether the busy has been caused by lockout or not is discriminated. In accordance with said discrimination, the CPU CC controls a relay controller RC, combines relays of a line test trunk LTT, and executes an operation, and lighting and flickering. |
