摘要
介绍了基于嵌入式技术的VoIP-PSTN网关的软硬件设计。其中软件设计主要负责控制SIP核心协议栈oSIP、RTP/RTCP核心协议栈ccRTP的正常运转,控制外围DSP芯片工作。硬件主要由基于ARM内核的微处理器S3C44B0子系统和基于LSI403LP芯片的DSP子系统以及电话接口模块构成。测试结果表明,所设计的VoIP-PSTN网关能够实现网关的主要功能。和现有VoIP设备相比,具有成本低、方便易用、可扩展性好等优点。
The software and hardware design of VoIP-PSTN Gateway based on embedded system are introduced. The software design are used to control the normal operations of SIP core protocol stack oSIP, RTP/RTCP core protocol stack ccRTP and the external DSP chip. Its main hardware are microprocessor S3C44B0 subsystem based on ARM core, DSP subsystem based on LSI403LP and telephone interface module. The test proves that the VoIP-PSTN gateway can achieve the main gateway function. Compared to current VoIP equipment, it has the advantages of low-cost, application flexibility and good scalability.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第6期1424-1427,共4页
Computer Engineering and Design
