用单片机软件实现V．_（21）建议

Realizing V._(21) Recommendation by One-chip Microcomputer Software

通过对ＣＣＩＴＴ的Ｖ．２１建议的分析，提出了用单片机软件实现的原理和方法，并给出了软件实现ＣＰ－ＦＳＫ的应用结果。结果表明这个方法是正确的，在相似的工作环境下有推广价值。

This paper describes the method of realizing V.21 recommendation by one-chip microcomputer software. practice shows that the method is right and it is applicable to similar environment.