http://ithelpblog.com/voice/opensips/install-opensips-1-8-on-ubuntu-12/

http://voipfreak.net/how-to-install-opensips-on-centos/

https://github.com/antonraharja/book-opensips-101/blob/master/content/2.1.%20Compile%20and%20Install%20OpenSIPS.mediawiki

http://m.blog.naver.com/PostView.nhn?blogId=euijin915&logNo=140088439570

http://nil.uniza.sk/sip/opensips/opensips-installation-debian

http://vidodz.wordpress.com/2009/07/28/install-opensips-on-debian-or-ubuntu/

http://viop4learn.blogspot.kr/2014/03/opensips-installation-on-ubuntu.html