Expansion And Consummation Of The Drive Of The Trunk Gateway

First, the paper introduces PSTN networks and IP networks concisely and discusses the important role of the communication between the PSTN networks and the IP networks in the development of the next generation networks .Then the paper gives an solution of this problem and draws out the main object which the paper elaborates,the trunk gateway. The trunk gateway can act as the Signaling Gateway between the PSTN networks and the IP networks to translate the SS7/PRI/No.l signaling to the SIP/H.323 protocol or reverse direction. Secondly, the trunk gateway can act as the Signaling Translation Server between SIP and H.323 protocol. Thirdly, the trunk gateway can also be used as the Media Gateway to implement the convert between PCM and RTP packetsThe second paragraph of the paper analyzes the architecture of the trunk gateway and expounded the concrete realization of the principle and the trunk gateway program.The third paragraph of the paper describes the design and the implementation of driver software of the trunk server in detail. Driver software mainly includes two parts, the signaling transceivers of E1/T1 links and media transformation. In this part the paper introduces some important process flows.The forth paragraph of the paper describes the fax function and the color bell funtion on the trunk gateway.The fifth paragraph of the paper introduces several solutions of the test of the trunk gateway and makes detailed testing plans.In the last part, the paper introduces some application solutions of the trunk gateway.