开源SIP IMS项目收集

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http://www.openimscore.org/http://www.minisip.org/http://www.pjsip.org/http://bbs.cnttr.com/viewthread.php?tid=113346
http://code.google.com/p/sipdroid/http://www.linphone.org/http://code.google.com/p/csipsimple/
http://code.google.com/p/pjsip-jni-android/