siteSIP

http://www.ce91.com/thread-92189-1-1.html

http://www.cnblogs.com/milospooner/archive/2012/07/15/2591979.html

http://doubango.googlecode.com/svn/branches/2.0/

http://baike.baidu.com/view/1616826.htm

http://code.google.com/p/imsdroid/

http://doubango.org/

http://www.webrtc2sip.org/
http://code.google.com/p/flash2ims/

http://code.google.com/p/openvcs/#Description

http://click2dial.org/index.html?svn=170

https://code.google.com/p/click-2-dial/source/checkout

http://sipml5.org/index.html?svn=20

http://code.google.com/p/webrtc2sip/source/checkout

http://code.google.com/p/openvcs/

http://www.linphone.org/eng/documentation/dev/tuning-linphone.html

http://www.kfsoft.info/article.php?idpk=62&t=7

http://blog.csdn.net/dfqin/article/details/8104412

http://www.cnblogs.com/tamer/archive/2012/06/28/2568739.html

http://blog.csdn.net/liaoqianchuan00/article/details/8260107

http://www.csdn.net/article/2013-04-03/2814763-famo-us-html5-platform-free-to-developer