采用东进D系列模拟电话语音卡编写的DTMF通信控制程序，与下位机完成数据传输。-Dongjin D analog telephony card prepared by the DTMF communication control program, and the next crew to complete the data transmission.

一款功能齐全的，适用于企业的内部通信工具，界面简洁，并能够进行语音-A fully functional for the internal corporate communications tool, the interface simple, and can voice

铁路运输通信数字式语音记录仪技术条件及实验方法，调度指挥工作中记录通信语音及相关事件的标准。-The technical condition of railway transport communication digital voice recorder and experimental methods, the standard of communication of voice and related events recorded in the dispatch command work

利用MATLAB gui 编的短波通信系统，录制一段语音信号，分别通过AM SSB DSB 等调制信号，加入噪声，然后解调出来，可比较各种调制解调方式的优劣。-Use MATLAB gui compiled shortwave communication system, record a voice signal, respectively, by AM SSB DSB modulated signal, etc., added noise, then demodulated, you can