In the research fields of communication and network, with its advantages, such as simpleness, efficiency, easy extendibility and so on, now SIP protocol becomes the mainstream control protocol in the field of VoIP. Do you love cheap north face jackets?TETRA digital trunked communication system has its advantages including better compatibility, fine openness, powerful confidentiality and so on.Where can I get nike running shoes? It is a digital trunked standard which is presently the best established, and involving the most manufacturers all over the world. In view of the important status and the current broad prospects of SIP and TETRA in the field of network and communication, the interconnection between TETRA system and SIP-based VoIP system will become a trend.At present, the interconnection between SIP and PSTN has its corresponding SIP-T standards, and the interconnection between TETRA and PSTN also has its corresponding standards.How much do these cheap straighteners cost? However, there are no corresponding standards proposed for the interconnection between SIP and TETRA. Therefore, it has great significance of researching and implementing SIP-based VoIP-TETRA gateway.Firstly, this paper summarizes the characteristics of SIP protocol and TETRA digital trunked technology and their research situation at home and abroad, and analyzes the network structure and function of SIP system and TETRA digital trunked system.
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