Pass normal Characteristic supervisory manner and of time sharing speech path device pass normal Characteristic supervisory mode null of time sharing speech path

摘要

PROBLEM TO BE SOLVED: To monitor the normality of a path at all times, even when the path is busy. ;SOLUTION: A means 4 that makes cyclic redundancy check(CRC) of data for each time slot multiplexed on highways H₁-H_n and a means 6 that stores the result of the CRC arithmetic operation by all time slots are provided to a pre-stage of time division channel devices 1-3 of a telephone electronic exchange. Furthermore, a means 5 that makes CRC arithmetic operation of data for each time slot multiplexed on highways h₁-h_n, a means 7 that stores the result of the CRC arithmetic operation by all time slots, and a means 8 that discriminates whether or not a path is normal by reading and comparing the CRC arithmetic operation results for each formed path to conduct the path normality test are provided to a post-stage of the time division channel devices in addition. All the paths are monitored at all times, by confirming the continuity to discriminate the normality, even when a path is busy.;COPYRIGHT: (C)1998,JPO