期刊名称：International Journal of Security and Its Applications
印刷版ISSN：1738-9976
出版年度：2015
卷号：9
期号：1
页码：337-346
DOI：10.14257/ijsia.2015.9.1.32
出版社：SERSC
摘要：Automation control systems demand high availability by providing its' users with reliable and uninterrupted service. Traditional monitor system fails to provide reliable service due to lack of protection of monitor link. It also requires TCP/IP, X.25, E1 and other interfaces to realize monitoring channels such as setting monitored object, reporting status information of monitored call, reporting voice data of monitored call. The organization of the system is very complicated. Besides, some old devices can't provide all the interfaces. Thus these old devices can't have access to the lawful interception system. This paper presents a method to provide the ability of monitor link protection under abnormal circumstance. This method offers complete monitor link protection with fewer interfaces. According to the result of experiment and practical application in many countries, the availability and reliability of the interception system have been greatly improved by using this method.
