短消息(SMS)是GSM 中最簡潔的數據通信方式。本文利用TC35i 通信模塊的SMS功能實現遠程前端不間斷電源（UPS）與監控中心之間數據和控制指令的雙向通信，通過單片機AT89C52 控制GSM 網絡基站中UPS 和空調設備的數據采集、參數調整與控制電路，實現
了對遠程UPS 和空調設備運行參數的數據采集、運行參數的調整與控制功能。實踐證明系統設計合理，運行穩定、可靠，經濟實用，管理靈活、方便。稍加修改，即可應用于其它遠程監控場合。
關鍵詞： GSM；短消息；遠程監控；AT89C52

Abstract: The short message service (SMS) is the most simple and convenient method for data communication in GSM system. The paper design and implement an dual communication system between the monitoring centre and the remote UPS and air conditioner by two TC35i modules. The system uses microcontroller AT89C52 to control and adjust remote UPS and the related circuits. Now the system runs well stably and reliably. It can be revised rarely and be applicable to the similar remote monitoring system
Key words: GSM; SMS; Remote monitoring; AT89C52