把一段语言作为秘密信息隐藏到宿主音频中，在公共信道中传递秘密信息。
It embeds a speech as the secret message into original audio signal, and transmits the secret message in the public channel.
我国目前的电话网是数模混合的，所以我国目前的信令系统也处于随路信令和公共信道信令并存的阶段。
Our country present telephone network is mixed by digital mode and analogy mode, so our country present signaling system is at the stage of CAS and CCS commixture .
对公共信道信令系统中的综合业务数字网用户部分（ISUP）和电话用户部分（TUP）进行了简单的比较。
The simple comparison is made between Integrated Server Digital Network User Part (ISUP) and Telephone User Part (TUP) in this paper.
对公共信道信令系统中的综合业务数字网用户部分（ISUP）和电话用户部分（TUP）进行了简单的比较。
The simple comparison is made between Integrated Server Digital Network User Part (ISUP) and Telephone User Part (TUP) in this paper.
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