基于asterisk 的计费系统，支持回拨，直拨，DID 一号通，web800 等运营， 本源码经本人汉化，汉化率99 ， 包含完整的中文提示，切修正大量bug-Asterisk based billing systems to support callback, direct dial, DID on the 1st pass, web800 such operations, after I finished this source, localization rate of 99 , c

osip再次封装，显现简单调用，回调，方便使用。在实际项目中应用-osip package again, show a simple call, callback, easy to use. Application of the actual project