用于Voip的MySQL数据库接口函数库，很有用处。-for the MySQL database interface functions, the very useful.

sip服务器原代码,要求在linux或者unix下安装,可以用于建立自己的voip系统,基于sip协议-OpenSIPS brings: robust and performant SIP (RFC3261) Registrar server, Location server, Proxy server and Redirect server small footprint- the binary file is small size, functionality can be stri

A2 billing is a switchsoftware that manages the billing of VoIP system servers, using a MySQL language based software to communicate with the Asterisk Server. It uses cards to configure and create entries.