Design And Implementation Of Embedded Integrated Communication Voice Gateway

With the development of information technology,the core network of voice communication has been gradually realized,and the integration of voice and data has been realized in the local office.Through the deployment of communication voice gateway at the user end users can put the end of the fixed network unified to broadband network.Through the study on the IMS networking solutions are analyzed,combined with the actual needs of the development of IP voice communication,the voice gateway is an embedded IP network telephone network fusion.This paper first discusses the significance and Prospect of fixed line network to the IP network,and the domestic and international development status of needle voice gateway are analyzed,put forward the requirements of medium scale voice gateway is a more suitable for deployment and technical specifications,the gateway needs at the same volume,the more integrated POTS interface.Based on the analysis of the number and function of the existing voice gateway interface,this paper designs an integrated 1U interface,which is suitable for medium sized enterprises to deploy and use the integrated communication voice gateway,based on the analysis of the number and function of the voice gateway interface.The gateway without the need for a dedicated room cabinet,the AC power supply,SIP communication protocol,POTS interface compatible with ordinary analog phone,while supporting the cascade expansion,support up to 5 devices cascade.Secondly,do research on the technology of voice gateway,the key indicators of performance analysis and design requirements,compared to the current mainstream chip design,to achieve the hardware design of the equipment of the main control chip is the most suitable and the peripheral interface chip,and focus on the main control module,memory module,network switching hardware module,voice interface module and the power supply module and other modules of the detailed design and implementation.Software architecture to fully consider the voice gateway high concurrency,high real-time requirements,the use of streamlined VxWorks embedded operating system,and the use of efficient software framework,and give full play to the performance advantages of the entire program.According to the software in MSP media processing module,CM management module,communication management module,flow media call control module,management module,FXS extended interface standardization and dynamic adjustment of power line module detail design and realization.Finally,according to the actual needs of enterprises,the production of equipment can be used to test the prototype,and complete the hardware module and software module debugging.By testing the key signal of the hardware,the voice gateway is ensured to run stably in a variety of external environment.Also carries on the POTS port's words road characteristic test,the whole machine electromagnetic compatibility test,the temperature rise test under the high temperature environment,as well as the entire machine call performance test.Finally meet the requirements of high concurrency,high performance gateway design requirements,POTS interface compatibility,completely ordinary analog phone internal original.