open sip 源码，GNU 的会话初始化协议栈源码，需要仔细研究。-open sip source code, belongs to GNU , suitable for sip R&D

This free source of voice and text chatting. This is able to use only on LAN, but if you do port forwarding, you can use it as VoIP. Thanks for your reading! -This is free source of voice and text chatting. This is able to use only on LAN, bu