| 摘要 |
<p>PURPOSE:To realize a low abort rate by forming the switch with a single kind of switch modules only and sending a read inhibit signal to a switch module of one preceding stage when a cell abort due to buffer overflow is going to take place in any of the switch modules. CONSTITUTION:Switch modules are arranged to each stage so that number of the switch modules of each stage of a line concentration switch is selected twice the number of switch modules belong to one succeeding stage with respect to the stage to which the switch module belongs and an output of the switch module of each stage is connected to the input of the switch module of a stage succeeding to the stage to which the switch module belongs. When cell abort is going to take place in a buffer memory of any switch module, a read inhibit signal is sent to the switch module of the pre-stage to stop the output of the cell to the switch module of the post stage. When there is no possibility of occurrence of cell abort, the transmission of the read inhibit signal is stopped and the cell transmission is restarted.</p> |
