usb电话开发中及windows 底层voice api的应用，mp3声音的压缩及解压-usb phone windows development and application of voice api bottom, mp3 voice compression and decompression

网络电话DLL调用演示程序。包括USB话机输入输出。DELPHI程序实例-Internet telephony DLL calls a demonstration program. Including USB phone input and output. DELPHI application instance