数字交换机接口特性检测研究

针对目前数字交换机检测使用的协议测试技术无法检测物理层参数和故障的问题,提出通过对接口特性检测判断交换机物理层故障的思路。通过研究交换机的接口特性检测内容,分析接口特性对交换机的性能与工作状态特别是对通信可靠性的影响,为提高通信设备的可靠性提供一定的参考。给出了使用通用测试仪器对接口阻抗与信号电平和回波损耗进行检测的方法,在实际使用中操作简单,使用方便。

Detection of digital exchanger interface characteristics

For the situation that protocol testing technology used in detection of digital exchanger can not detect physical layer parameters and faults,a method to determine the physical layer faults of digital exchanger by detecting the interface char-acteristics is put forward in this paper. Based on the research of the detection contents of the interface characteristics for digital exchanger,the effect of interface characteristics on the performance and working state,especially the communication reliability, of digital exchanger were analyzed. It provides a reference for improving the reliability of the communication equipments. A meth-od to detect interface impedance,signal level and return loss by a universal testing instrument is proposed,which is simple and easy to operate.