| 摘要 |
PURPOSE:To attain instantaneous calling by sending a cut-off signal and a resource release signal continuously from a call processing processor when a fault takes place at a part of a network so as to release a release standby state even when cut-off signals collide with each other. CONSTITUTION:If the fault takes place at a part of network, the call processing processor 10 detects it and sends a cut-off signal 1 and a resource release signal 2 continuously to a line concentration stage processor 20. When no cut-off signal is generated from a digital subscriber terminal equipment 30 in this case, the cut-off signal is used for a conventional release processing after the line concentration and succeeding stage and a resource release signal 2 is treated as an invalid signal by a line concentration stage processor LPR. When a cut-off signal is generated from the digital subscriber terminal equipment 30 conversely, the cut-off signal sent from the call processing processor 20 is treated as an invalid signal by the line concentration stage processor 20 and the resource release signal makes the conventional processing of the line concentrating and succeeding stages effective. Thus, the release standby state of the line concentration stage processor is released as fast as possible.
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