摘要
针对G.703E1传输线路的检测与维护,利用MT9075芯片的失步告警、PCM传输、CAS、CCS信令处理等功能,设计了由89S52单片机控制的PCM线路测试仪。该测试仪可根据串口信令或DIP开关设置实现对PCM线路状态监测、线路话音监听与插入、线路信令分析等功能,且具有易于操作、性价比高等特点。
For the test and maintenace of G. 703 E1 transmit line, we designed a PCM line test device which is controlled by microprocessor 89S52,by using the functions of MT9075 chip such as line alarm, PCM line transmit, CAS and CCS. This device can monitor PCM line status, receive or send line voice, analyse line signal, by reading the commands of serial interface or the setting of DIP switch. This device is easy to operate and has a high ratio of quality and price.
出处
《电子器件》
CAS
2005年第4期792-794,797,共4页
Chinese Journal of Electron Devices
