开源的SIP协议库的扩展库，支持WINDOWS、linux，可用于开发SIP软电话，是对OSIP库的封装，这是09年最新版本，libeXosip2-3.3.0。-Open-source SIP protocol extension library database, support WINDOWS, linux, can be used for the development of SIP Softphone is OSIP library package, 2009 This is the l