RECOVERY SYSTEM FOR ABNORMALITY OF LOOP LINE

PURPOSE:To effectively attain the recovery processing of a communication function by deciding the normality or the abnormality of loop information and providing a priority in respective recovery processings corresponding to the respective decisions. CONSTITUTION:OR condition parts 141-14s are disposed so as to erase the storage of storing parts 121-12n according to the normality decision output of corresponding decision parts 111-11n and the storing output of the abnormality detection previously decided in time. Accordingly, when a pattern abnormality is decided to be the abnormality in the plural decision parts 111-11n, the recovery processing corresponding to the type of the abnormality previously decided in time is precendently carried out and after this recovery processing is completed, when the abnormality decided afterward in time continues, the recovery processing to the abnormality is executed. In such a way, one recovery processing is executed in time and the plural recovery processings are not executed in parallel.