Abstract:Obtaining information is one of the most important requirements for intelligence works, spy surveillance cameras and listening devices are among the important means for this. One problem of using these means is a mechanism of controlling them to sustain their work efficiently for the perpetuating of achieving the purpose of their installation. In this research, the problem of controlling these devices has been overcome, by designing a system dependent on the dual tone multi frequency (DTMF) and global system f… Show more
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