本程序演示语音电话的原理。您只要输入对方的电话号码，然后拨号，对方拿起电话，就可以听到由计算机播放的声音和音乐了。-this program demonstrated the principle voice calls. Your input each other's phone numbers, and then dial-up, the other side just pick up the phone, you could hear the broadcast by the com