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该文所给出的系统是以ＭＣＳ－５１为主体，集检测、计时、控制为一体的实用装置，它能够实现对电话的有效管理，具有广阔的市场前景。
The system presented in this paper is a practical device based on MCS-51, which integrates detection, timing and control. It can achieve the effective management of the telephone and has a broad market prospect.