Research and Design on Voip Access Gateway for Wireless Sensor Network

With the rapid development of broadband networks and information technology,the separation of fixed line telephones,Internet and mobile networks can not meet the increasing requirements of enterprises.As a result,an unified communication technology for enterprise,which can integrate various communication manners and comprehensively manage various types of information data,is needed.On the other hand,with the maturation of short-range radio technology and wide deployment of wireless networks,there is also a need to include wireless networking in the unified communication platform.In this paper,base on analyzing the wireless communication technology,combining with sensor technology,we focus on the hardware design of VoIP access gateway and present the structure which includes the RF module,VoIP module,and PSTN module.Furthermore,we design the schematic and PCB of VoIP access gateway.