我军、我国各部门使用着大量指挥专线,此类线路的特点是:(1)工作性质比较重要,而平时通信量较少,有了故障或隐患不易发现,一旦需要使用时如果不通,就会耽误大事。(2)线路组成不同,有的可能是一对电缆或一条被复线,有的要经过载波、数字话路、有线甚至无线信道,中间环节复杂,因此出现故障的可能性也比较大。“全程巡测”的目的,是使重要线路的故障能及时发现,及时处理,保障指挥通信不中断或少中断。现在惯用的方法是人工逐路振铃通话试线,这样比较费事,往往不够及时;若 Our army and various departments in our country use a large number of direct lines. The characteristics of such lines are: (1) the nature of the work is more important, and the amount of communication is usually less; if there is a fault or a hidden danger, it is not easy to find out; if it fails to be used Will delay the event. (2) different line composition, and some may be a pair of cables or a double line, and some to go through the carrier, digital voice, wired or even wireless channel, the intermediate link is complex, so the possibility of failure is relatively large. The purpose of “full tour inspection” is to make the failure of important routes timely discovered and dealt with in time so as to ensure uninterrupted or interrupted command and communication. Now the usual method is artificial one-way ringing call test, so more trouble, often not timely enough; if