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目前，市场上推出一种新型带ＤＳＰ全固态留言免提电话机，该机除具有普通免提扬声电话机功能外，还具有１６ｓ的留言信息。主人有事外出，对方来电振铃４－５次后能立即启动告知对方留言内容。 一、基本电路原理 语言的储存，就是将语言信号转换成相应的音频电流，然后经放大
At present, a new type of all-solid-state voice message-free speakerphone with DSP is introduced on the market. In addition to having ordinary speakerphone functions, the machine also has a 16s message message. Host something out, the other ring after ringing 4-5 times immediately start informing each other message. First, the basic circuit principle Language storage, is the language signal into the corresponding audio current, and then amplified