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