Invention Application
US20070025331A1 Systems and methods to send and receive encrypted DTMF digits in a data flow 有权
在数据流中发送和接收加密的DTMF数字的系统和方法

Systems and methods to send and receive encrypted DTMF digits in a data flow
Abstract:
Systems and methods provide for embedding white noise signals representing DTMF digits into a voice data stream.
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