CSipSimple 是个款通用的支持SIP协议的互联网电话软件，可以在支持andriod的平板，手机上使用。
本源码仓储由官方SVN转成git，并由ZenCodex 维护，如果有问题，请邮件联系 v@yinqisen.cn
中国CSipSimple爱好者QQ交流群：13945450 ZenCodex's Blog：http://yinqisen.cn
This project will allow native sip for android device.
It relies on the pjsip sip stack project.
Supported features :
SIP for calls and instant messages
Android integration with rewriting and filtering rules
Codecs : pcmu/a (aka g711u/a); speex; g722; gsm; iSAC; SILK; G729; AMR (depending on device) and as extra plugin : OPUS; g726; g722.1; codec2
Echo cancellation (with various backends : webRTC, speex, simple)
Auto speaker/earpiece option
API provided for other apps plugins.
Conference, transfer.
Secure call with TLS transport for SIP and SRTP or ZRTP for media.