| 摘要 |
PURPOSE:To increase the processing ability of software of a switchboard by detecting the varied information from a same subscriber's line and, then, stopping the detection of varied information. CONSTITUTION:The subscriber's line information scanned peroidically is supplied to CDL (subscriber's line change detecting circuit ) 203 through PL (the circuit storing the scanned result of present peroid) 203 and is compared with the result scanned in the last time; when the indication of report stop from DSTP (an independent interrupt circuit for subscriber's line change detection) 205 to QUE (a queue for the report of subscriber's line varied information is not set, the compared result is stored in QUE 204. At the same time, the succeeding indication for report stop to QUE 204 is set on DSTP 205. Therefore, the variation of same discriber's line after the succeeding peroid is reported to the software through QUE 204. |
