Based on the signaling mechanism and working mode of the two systems, this paper introduces the design scheme of the gateway architecture, the mappings of signaling and the procedure of signaling interconnection between SIP and TETRA. I would like to take this chi hair straightener.The gateway connects SIP network and TETRA network by imitating the form of base station, and defines Az interface information as the way of communication with TETRA network.Ralph Lauren Polo shirts are the best gift for your friend! Then based on the mapping relationship of signaling, the gateway completes the transformation and transmission for SIP messages and TETRA signalings, and successfully achieves the call establishment according to the procedure of signaling interconnection. These are my chi flat iron!And then the gateway is achieved from two aspects of system platform and application development. For the application development, the task design and program development are implemented by using the open eXosip/oSIP protocol stack. Finally, by unit tests and system functional tests of the gateway, the implementation scheme of the signaling gateway between SIP and TETRA is verified, which provides a reference for future study.
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