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中继测试是指利用交换局内的专用中继测试系统把出入中继设备及局间传输线路结合起来,进行全程全网的完整测试。这种测试的实质是把两个交换局的用户通话需经过的途径进行定期的或即时的检查,以及时发现局内中继设备和传输线路上的故障,提高局间接通率。中继测试是保证通信畅通、服务质量的一项重要技术措施,其自动化程度和功能强弱也是衡量该交换机的维护功能完善与否、设备先进程度的一个标志。
Trunk test refers to the use of exchange within the private relay test system to the relay equipment and transmission lines between the Bureau combine to conduct a full test of the entire network. The essence of this test is to periodically or instantaneously check the routes that the users of the two exchange offices need to go through in order to find out the faults on the intra-office relay devices and transmission lines in time and improve the inter-office call-through rate. Relay testing is an important technical measure to ensure smooth communication and service quality. The degree of automation and function of the relay test is also a measure of the maintenance function of the switch or whether the equipment is advanced or not.