主要介绍了现在应用最广泛的网络电话的SIP协议服务器，通过服务器可以更好的解决网络通话现象。-introduced the now widely used in Internet telephony SIP server, the server can better resolve network calls phenomenon.

SIP协议栈for linux

基于SIP协议的嵌入式家庭网关设计，以QQ2440V3开发板为基板，采用linux操作系统，使用zigbee技术设计无线收发模块。-Embedded family gateway design base on SIP protocol，by QQ2440V3 development board for boards, the Linux operating system, use zigbee wireless transceiver module design technology.