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This paper presents a new development of mobile communication in application to remote data transmission and control. A concept of G3 is proposed, including GPS, GSM, and GIS. In this paper, a GSM real time control system for data uplink and downlink remote terminals is considered. The proposed system can be implemented on a PC-based or a μ P-based to integrate into G3 configuration. This paper presents the system design and implementation with practical data verification. From experiment results, the proposed GSM real time control system has a bottleneck of 580 ms delay in highly reliable and accurate uplink and downlink communications.