现代信息科技2026，Vol.10Issue(5)：193-198,6.DOI:10.19850/j.cnki.2096-4706.2026.05.035
基于单片机的固定电话未接来电告警系统设计
Design of a Missed Call Alarm System for Landline Phones Based on a Single-chip Microcomputer
胡嘉耀1
作者信息
- 1. 福州大学梅努斯国际工程学院,福建 福州 350108
- 折叠
摘要
Abstract
To address the lack of missed call alerts in most existing landline phones,which can lead to missed important calls,a sound and light alarm system for landline missed calls based on an AVR microcontroller(ATmega16)is designed and implemented.The system processes the telephone line signal through a preconditioning circuit for voltage reduction and level shifting.The ADC module of single-chip microcomputer samples and analyzes the features of the processed signal,accurately identifying telephone states-idle,ringing,off-hook,and on-hook-using a Finite State Machine(FSM)model.When a ring is detected without a subsequent off-hook action within a set time,the system activates audible and visual alarms via an optocoupler-isolated driver circuit.Test results demonstrate that the system accurately identifies states across various calling scenarios and triggers alarms reliably,effectively alerting users to missed calls and thereby reducing potential risks associated with unanswered calls.关键词
固定电话/未接来电/单片机/告警系统Key words
landline phone/missed call/Single-chip Microcomputer/alarm system分类
信息技术与安全科学引用本文复制引用
胡嘉耀..基于单片机的固定电话未接来电告警系统设计[J].现代信息科技,2026,10(5):193-198,6.
