| 摘要 |
PURPOSE:To reduce the processing time, by performing the collation check with the vacant call state memory, through the provision of selection successively with the first selection point when the vacant state memory is renewed and it reaches the final line of memory. CONSTITUTION:The allocated position information of the exchanger is memorized corresponding to the subscriber number to the memory unit MEM, and if the subscriber number is the representative subscriber number, the vacant state display memory BUSY is provided corresponding to the representative line number in the representative line group. Further, if the sequential selection for the vacant state display memory BUSY reaches a given line in the representative line group, the busy condition of all the representative lines in the representative line group is inspected for the C line of the exchange line link, renewing the busy state display memory BUSY, and if it reaches the final line of the memory MEM, it is returned to the first selection point and the sequential selection can successively be made. Thus, the collation check with the busy state memory allows the processing time to be reduced. |
