this the source code of library information system write in C++ language-this is the source code of library information system write in C++ language

使用SIP进行通话时,出现断话,产生的Q.850代码查询断话原因.-When calls clear in SIP, H.323 and ISDN a "Cleardown Cause Code" is provided to indicate the reason why the call cleared down.

对软交换中的sip消息的各个部分进行自动解析-Sip soft information exchange in various parts of the automatic analysis