http://wenku.baidu.com/view/fd7376be960590c69ec37667.html
基于P2PSIP的网络电话系统
http://wenku.baidu.com/view/820bd57b1711cc7931b7161a.html?from=rec&pos=2&weight=2&lastweight=1&count=5
http://wenku.baidu.com/view/fd7376be960590c69ec37667.html
http://wenku.baidu.com/view/820bd57b1711cc7931b7161a.html?from=rec&pos=2&weight=2&lastweight=1&count=5