Siproxd is a proxy/masquerading daemon for the SIP protocol. It handles registrations of SIP clients on a private IP network and performs rewriting of the SIP message bodies to make SIP connections work via an masquerading firewall (NAT). It

Kphone 是其于QT界面的开源SIP 软件电话,支持语音,视频和文字消息交流.经测试,可以在Redhat 9.0 直接编译通过.在Arm-Linux 上需要比较多移植工作 以下是Kphone 是在SBC2410 ,Arm-Linux 2.6.11 内核移植过 -QT are Kphone its software interface, open source SIP phone to support voice, video and text message exchanges.

sip 协议程序中的实现 源码 用于kphone-sip kphone source code