基于visual c++的语音电话系统，基于串口，使用调制解调器实现的语音电话-based on visual c voice telephone system, based on the serial port, the use of the voice modem phone

一个很好的MODEM拨打电话的源程序,对串口的学习有很好的帮助-A good source MODEM call of serial learning have a very good help