支持电话拨号，当收到拨号呼叫可自动摘机，可用于电话机自动控制，便于人工通话，对话音数据进行处理和转发至计算机通信终端-Telephone dial-up support, upon receipt of a dial-up calls can be automatically picking machines, automatic control can be used for telephones, to facilitate manual calls for voice data proce

51系列单片机普通的IO 口模拟串口通信，已经过测试，可以直接使用-51 Series single-chip analog IO serial communication, has been tested, and can be used directly. . .