用于测试DTMF收发，主要测试时间控制，本代码经过测试通过-used to test DTMF transceiver, the main control testing time, the code after the test

DTMF数据收发器 MT8880远程抄表客户系统-DTMF Transceiver MT8880 data customers remote meter reading system. .

电话银行VB例程 D080A-R （PCI ）语音处理卡保持了东进公司产品一贯的优良品质，高可靠，易用性及良好的性能价格比。高密度设计，单板完成8 路通道的处理，含有16 路DTMF 收发，数字录放音，信号音检测，主叫号码识别。-Telephone banking VB routine D080A-R (PCI) voice processing cards to keep the East into consistent good quality products, high reliab

dtmf双音多频收发系统，时序流程-DTMF DTMF transceiver system, flow..........................