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In order to meet the needs of improving security environment of mining to prevent accidents, backwardness of existing underground voice communication system are deeply analyzed in this paper. By combining embedded WINCE 6.0 system with VoIP(Voice over IP) technology, a new kind of wireless underground voice communication device is designed. And then corresponding realization details are discussed...
This paper fusion many multimedia network and related technology, Set up a set of a complete VoIP system. Through the analysis of the Corporate computer networks and the telephone network, establish a VoIP network telephone system on the basis of existing LAN, realize the application of an enterprise Internet phone calls, to achieve the purpose to reduce call charges. Finally simulate with OPNET,...
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